Tag Archives: UFO

Heinkel-BMW Flying disc project

Weimar and Nazi Germany, WW2, , , ,

Nazi flag Nazi Germany (1940)

Experimental circular-wing aircraft

Number built: Allegedly, up to four prototypes

An artistic drawing of what this unusual aircraft might have looked like source: www.nevingtonwarmuseum.com

The German military industries during the Second World War are often seen as highly developed, and producing highly sophisticated, superior weaponry to that used by the Allies. The reality is quite different, as they began to implement the mass use of slave labor and were chronically short of several key resources. Regardless, bright engineering minds and desperation led to the introduction of a series of new technologies, some being the first of their kind. The German aviation industry was credited with creating some advanced and innovative, but ultimately scarce aircraft designs such as the Me 262 jet fighter. With this reputation, many theories on German hyper-advanced, secretive aircraft projects began to spread after the war. Among them, was the theory that they had created a series of supersonic, flying saucers.

The Myth of German Technological Superiority 

In the decades after the Second World War ended, in media and popular culture, German military technology and industry were often presented as significantly superior to the Allies. This is perhaps the most obvious when mentioning the German Wunderwaffe (Eng. wonder-weapon). These weapons ranged from flying bombs, ballistic missiles, jet engines, and super-heavy tanks. In essence, from the German perspective, the Wunderwaffe presented any weapon that would help them turn the tide of the war. Probably the best examples that were used in greater numbers were the V-2 rockets and the Me 262 jet fighter. In the case of the V-2, these were used en masse to bomb targets in Great Britain and continental Europe. Descending at a speed of nearly 6000 km/h, they could not be tracked and struck without warning. The Me 262 was able to achieve speed far superior to that of ordinary piston-powered aircraft., and with its armament of four 3 cm cannons, it could easily take down heavy Allied bombers.

Before we go any further we must discuss the history and truthfulness of these wonder weapons and their origin. It is important to point out that the German war industry prior to and during the war struggled with numerous industrial shortcomings. It was unable to produce enough quantities of weapons and materiel to satisfy the German Army’s demands.  This can be best seen in the pre-war tank production when during the invasion of Poland, only a limited number of modern Panzer III and IV were available. The lack of anything better forced the German armored formation to rely on the weaker Panzer I and II tanks. The effective heavy tanks, such as Tigers, due to their complexity and price, were built in limited numbers. Even the Panther, of which some 6,000 were built, which was much cheaper and easier to build, could never be produced in such numbers to fully replace older designs. The Army itself, while generally portrayed to be highly motorized, was actually heavily dependent on horses for the transportation of artillery and supplies.

Regarding the term Wunderwaffe, it is almost entirely associated with German propaganda. The term was more actively used when the war began to turn bad for the Germans, especially after defeats like the one at Stalingrad. In theory, any weapon or vehicle could be categorized as a Wunderwaffe. Ranging from an assault rifle to a jet-powered aircraft. Some were just paper projects or simple proposals that were intended to enter production but they actually never did.

Now the question would be were these weapons truly superior to the Allied ones? A simple answer is no, but every single of these Wunderwaffe had pros and cons, so making a simple conclusion about their effectiveness and use would revive extensive research and work that is beyond this article. But we can briefly consider the effectiveness of the two previously mentioned weapons systems, the V-2 and the Me 262. While the V-2 was quite advanced for its day, it was plagued with many problems. The reliability of the rockets was not guaranteed with some of them exploding during take-offs. Precision was their weakest point, and by late 1944, when they were used en mass, the Germans simply lacked the means to observe their effectiveness against targets in Great Britain and could not correct the aim of the rockets. The Me 262 was also far from perfect, given the technological novelty of many of its components, it too suffered from poor reliability. Both weapons were also introduced too late to have any real impact on the war.

The first mass-produced jet fighter in the world was the Me 262. Source: Wiki

The Germans lost the war, which obviously showed that the concept of the Wunderwaffe was just a desperate attempt to increase the morale of its people and to fight the ever-increasing fear of a possible defeat. But despite it, these weapons continued to tickle the imagination in modern-day culture. To some extent, some mysteries would emerge after the war, that were either fabricated or were to some extent real. The probably best-known, and most infamous is the German flying disc project which employed the unusual circular wing design.

A Brief History of Circular Wing Design

While the circular wing design may be seen often wrongly connected to the unidentified flying object its actual origin is more earthly in nature and goes way back to the 18th century. One of the first recorded proposals for using a circular wing design to create a flying contraption was presented by Swedish scientist and philosopher Emanuel Swedenborg. He published his work in a scientific journal in 1716, but his proposal ultimately led nowhere. Nearly two centuries later in 1871 when French inventor Alphonse Penaur tested his own flying model. Encouraged by this success in the following years he began working on a new aircraft design that was to have elliptical wings and be powered by two smaller steam engines. But he committed suicide in 1880 and never fully implemented this new project. In the 1910s a wealthy weaver, Cedric Lee and his friend George. T. Richards began working on a circular wing glider. After a series of flight tests, they noticed that the glider had a good overall flying performance. Inspired by this success, they hired an engineer, James Radley, to help them build their new propeller-driven circular-wing aircraft in 1913. This aircraft also performed well during its test flight, but during the landing, the engine stopped and the aircraft crashed. While the pilot was unharmed the aircraft was a complete loss. Both Cedric Lee and George. T. Richards continued working on improving their design, but after a few more crash landings, they gave up on their project. In the 1940s, the American Army and Navy experimented with using a few different semi-disc wing designs These were the Boeing B.390 and the XF5U-1. While boths were surely interesting aircraft, their overall design proved to be a failure and none would be accepted for service.

Cedric Lee and George. T. Richards incomplete experimental circular-wing aircraft. Source: B.Rose and T. Buttler Secret project Flying Saucer Aircraft
The Boeing B.390 design, while being a much simpler design than the XF5U-1, proved to be an unsuccessful design. Source: B.Rose and T. Buttler Secret project Flying Saucer Aircraft

The Flying Disc Project

The history of German flying disc projects is rather poorly documented, and in many cases, outright fabricated. They were allegedly related to German attempts to develop a vertical take-off and landing (VTOL) aircraft. It is surrounded by a veil of secrecy, and quackery, and probably that is the main reason why it is often connected to mythical or even supernatural origins. It is worth mentioning that the sources regarding these developments are quite unreliable, as they are mostly based on stories told by eyewitnesses and individuals. The reliability of these eyewitnesses and individuals should be taken with a great grain of salt. We must take into account that many of the written sources were made decades after the alleged events occurred. Another vital point to consider is the reliability of the main individuals that were allegedly involved in such projects. One such person was Rudolph Schriever, who after the war, gave an account of his reputed involvement in the development of a secret flying disc aircraft.

According to his story, the German Reichsluftfahrtministerium RLM (Ministry of Aviation) appointed a young aircraft design engineer and pilot, Rudolph Schriever, to work at the Heinkel-Rostock design office. In reality, he had no verifiable claims to German military service, relating to aviation or otherwise, and his only known employment was for the US Army as a truck driver after the war. It’s also not quite clear, but in some sources there is a mention of  a certain Otto Habermohl, supposedly also involved from the start. Not to be beaten out by Schriever, there is not only any evidence for his credentials, but he doesn’t seem to have existed at all.

At that time, different engineers wanted to solve the issue of reducing the space needed to launch and recover aircraft. One solution was to launch an aircraft directly, and vertically into the sky. In this case, such aircraft would not need a long runway and instead could take to the sky from a single launching point. But this concept, while tested over the years, was never successfully implemented during the war.

Schriever claims to have  approached this problem with a somewhat unusual solution. He made plans using a disc-shaped aircraft powered by jet engines using the so-called Coanda effect. This effect was named after the Romanian Henri Marie Coanda, an aerodynamic engineer. He discovered that when using a  jet stream  that is applied tangentially against a convex surface it creates a lift force that could be further increased by circulation. Schiriever claimed to have presented his idea to Ernst Heinkel, who was said to have liked the concept. This supposedly led to the start of work on a small prototype. He claims that after some work, the prototype was completed in early 1941. This prototype received the simple V1 designation without any prefix for the aircraft type. This should not be confused with the V1 flying bomb, as the V stands for Versuchs (experimental or trial model) which was quite commonly used by the Germans especially in the aviation industry to describe experimental or pre-production models. This prototype supposedly consisted of a disc-shaped wing design powered by an electrical rotary fan, no power source is given.

In 1942, this prototype was allegedly flight tested. No precise information about its overall performance exists. The assembly of this prototype named V2 was said to have begun in nearly 1943. By that point, Schriever claimed that some design work was moved from Germany to occupied Czechoslovakia. Škoda factories near Prague are assumed to have provided assistance to this project, though he did not specify in his testimony.  A few other companies were also mentioned to be to some extent involved in this project, this includes Junkers, Wilhelm Gustloff, and Kieler Leichtbau. The fate of the V2 prototype is not clear.

The testing of the Schriever flying disc was supposedly observed by a group of some 25 eyewitnesses from the Flight school which was stationed near this airfield. One of these eyewitnesses gave testimony to a German aeronautical magazine Flugzeug in 1987. The truth of these claims cannot be completely verified with certainty. If we consider the fact that more than 40 years have passed since this incident to the moment they gave the interview. They reportedly saw a strange disc-shaped aircraft. This aircraft was described as disc-shaped with an estimated diameter between 5 to 6 m with the height of an average man. They also reported that it had an aluminum color. And that while being on the ground held in position by four landing gear legs. It managed to reach a flight of around 300 m of distance at 1 m of height.  In the event the witness was not being intentionally misleading, it is likely they saw a helicopter being tested, several designs of which were researched and built during the war.

 

This piece of equipment is often mentioned to be the Rudolph Schriever demonstrator for the whole concept.It shares a notable resemblance to a torque converter. Source: B.Rose and T. Buttler Secret project Flying Saucer Aircraft

Name of the project

Beside the names given to the prototypes, this whole project appears to not have received any official designation, which was somewhat odd. It is often simply referred to as the Heinkel-BMW or by its name of the inventor Schriever, or even as the Schriever-Habermohl  flying disc. Also sometimes it is also referred to as Flugkreisel (Flying top). This article will use the Heinkel-BMW flying disc designation for the sake of simplicity only.

Further Work

By 1944, the whole team that worked on this project was supposedly moved to Czechoslovakia. The entire personnel were not stationed at one facility but instead relocated to various small cities in that occupied country. Allegedly, this was done to avoid any of them being killed in the Allied bombing raids. The main base of operation was said to be the Praha-Kbely Airfield. According to Schriever, by this time, other aircraft design engineers began joining the program. One of them was SS Lieutenant Helmut Zborowski who was then appointed commander of this base. Given his position, Helmut would be most likely directly involved in the project. Others included Dr. Richard Miethe who may have been involved in the German rocket development. He may have been involved in the Peenemunde rocket research center, but his work there was never verified and so far no connection has been proven. Lastly, there was Klaus Habermohl and surprisingly an Italian, Dr. Giuseppe Belluzzo, who specialized in the work of turbines. The involvement of these two in the supposed project is unclear. Dr. Giuseppe Belluzzo claimed after the war that he was involved in the disc-shaped aircraft project but there is no proof  of this. Klaus Habermohl is another strange person that allegedly worked on this project. What is bizarre is that no actual proof was ever found that this was a real person that existed. Lastly, the role of Joseph Andreas Epp, who was an engineer, was a supposed consultant to the Heinkel-BMW flying disc program. After the war, he claimed to have greatly influenced the German disc-shaped aircraft project, but if this is true, or was just an attempt to gain fame are unknown, the latter option seems more possible.

Schierver claimed that, together this team decided to proceed and built a third,even larger aircraft. The necessary component for the aircraft was to be supplied by Heinkel while  Bayerische Motoren Werke AG – BMW was to have been responsible for providing the necessary engines. During the construction of the V3 prototype, one member of the team proposed using an experimental radial flow gas turbine engine which was adopted. The V3 was said to have been completed in the autumn of 1944. It was said to be  almost double the size of the previous prototype with a diameter ranging from 12.2 to 15.1 m. No specific model of jet engine was mentioned. Supposedly, this aircraft was capable of achieving subsonic speed and could take off vertically.

Alleged drawing of the V3 prototype, note there are a few slightly different drawings of this alleged prototype. Source: www.nevingtonwarmuseum.com

As the war was by this point obviously lost, the Germans tried to delay the inevitable, and out of desperation, the SS became more involved in Wunderwaffe projects. This flying disc was said to be one of them, with their supposed involvement helping to add another layer of esotericism. Supposedly, soon the new V7 prototype was under construction. The fate of the V4, V5, and V6 prototypes is unknown. The last prototype, the V7 was reportedly designed to be larger than its predecessor by having a diameter of 18.3 to 21.3 m. This prototype was to be powered by gas turbine engines, from the start. At some point the work on the prototype was supposedly taken over by Richard Miethe.

Technical characteristics

Given the general obscurity and poor source materials, the precise construction of this bizarre aircraft is unknown. The available information should be regarded as illegitimate as it is technically incorrect, extremely inconsistent, and often fantastical.

A drawing of the flying disc’s lower part. source: www.nevingtonwarmuseum.com

The aircraft itself was envisioned as a circular-rotary wing design likely made of metal and powered by several smaller jet engines. It consisted of a centrally positioned crew cabin, which was surrounded by a large rotary wing assembly, resembling a huge fan. These were surrounded by a huge likely metal ring. What holds this ring in place is not clear according to a few drawings of it that exist.

The V7 had a diameter of 18.3 to 21.3 m. To provide stability it is often suggested that this aircraft received a stabilizing fin added close to the central cockpit. The central cockpit appears to be hemispherical and was fully glazed, providing the crew with a good upper all-around view. The lower view would be greatly restricted by the large rotary wing and present extreme difficulty in landing. How they would resolve this issue is not clear. It is possible that at the bottom of the cockpit, additional windows were to have been added.  The crew consisted of two to three crew members whose roles were not specified.

Beneath the large rotary wings, at least four jet engines were to be used to power the whole assembly. These provided lift during take-off and landing. Allegedly, horizontal flight could be achieved by adding additional engines possibly connected to the lower part of the cockpit unit. Several different possibilities could have been used for this project. Ranging from Jumo 004, Jumo 211/b, BMW 003 engines, Walter HWK109 rocket engine, or the Argus pulsejet. Its alleged maximum speed achieved was 1,200 km/h or up to 2,000 km/h at a height of 12,400 m. Given its nature, and that none of the engines would have sufficient performance for supersonic flight, both numbers seem unrealistic, to say the least. Even in Rudolph Schriever’s own testimony after the war, he claimed that the prototype only managed to achieve some basic flights. There is no record that any kind of armament was tested on this aircraft.

The Fate of the Project

Like most parts of this aircraft, its final fate is unknown. Hard to verify, and often absurd claims, mention that it climbed to  heights of 12.200 m or managed to reach supersonic speed. Given that it was supposedly in its early development phase when the previously mentioned test flight was made, it is dubious that such a flight was possible even with all of the other issues.

The V7 was said to have been destroyed by the Germans to prevent its capture. Or the Germans failed in this and the Soviets managed to capture it, with no evidence existing in either case. There was also said to be a V8 prototype that was under construction by the war’s end. Another interesting but unconfirmed information is that some members of the team who worked on this flying disc including Richard Miethe actually managed to surrender to the Western Allies. This seems unlikely and was possibly fabricated by Miethe, who was known to have been involved in some different conspiracy theories, so his background is also not verifiable.

The alleged photograph was taken by Joseph Andreas Epp while he was driving toward the Prag airport in (possibly August) 1944. The part of the picture to the right is the same photograph that just increased in size and focused on the aircraft itself. Source: H. Stevens, Hitler Flying Saucers

Ironically, the Germans actually managed to develop and built in small series a rocket-propelled VTOL aircraft, the Ba 349. While quite an unusual design, it was a  real, and more practical aircraft in contrast to fictitious flying disc projects.  By the time it was flight tested in March 1945, it proved to be a failure.

The experimental and unusual rocked-powered Ba 349 Source: Wiki

Production

After the war, Joseph Andreas Epp claimed that at least 15 various prototypes were built and tested by the Germans. This number also includes another similar project that runs parallel to the alleged Heinkel-BMW project.

  • V1 –  Small prototype model
  • V2 –  Second prototype whose fate is unknown
  • V3 –  Tested in late 1944
  • V4-6 –  Possibly paper projects
  • V7 –  Larger fully operational prototype
  • V8 –  Alleged improved V7 prototype

Is the whole story actually True?

Not surprisingly the entire story about Rudolph Schriever’s work is in all likelihood, a complete fabrication. Author, G. Rendall (UFOs Before Roswell) gives a quite detailed account of the Schriever’s involvement, or better said, lack thereof in the German flying disc program.

The connection between Schriever and the Luftwaffe is not clear. While he is often described as having the title Flugkapitan (Flight Captain) this was not an official military rank but instead an honorary title given to civilian test pilots for their service. This usually includes testing a prototype aircraft and testing newly built planes. Schriever, allegedly thanks to his idea of a flying disc, and pilot skill was said to be summoned to Heinkel. In reality, there is no evidence to support this, neither him being an engineer nor a test pilot. His first public appearance and general mention of his flying disc project occurred when he gave an interview to the Der Spiegel news magazine on the 30th of March 1950.

Schriever may have been influenced to come up with his story by the Italian post-war flying disc stories. In the late 1940s Italian engineers showed great interest in designing similar aircraft. One engineer Francesco de Beaumont proposed a disk-shaped aircraft design powered by four jet engines. Another engineer Giuseppe Belluzzo in his own story given to the magazine Il Giornale d’Italia, was he mentioned Italian and German flying disc development.

Francesco de Beaumont proposed a disk-shaped aircraft proposal. Source: B.Rose and T. Buttler Secret project Flying Saucer Aircraft
A drawing of the Rudolph Schriever flying disc was published in the German newspaper Der Spiegel in March 1950 Source: H. Stevens, Hitler Flying Saucers

In any case,  according to Schriever’s interview, he allegedly became involved in the flying disc program in 1942. Quite interesting is the fact that according to Schriever’s own words, this aircraft was successfully flight-tested.  He continued to work on this project up to the end of the war when he had to flee with the whole documentation and plans. He set up a small workshop and the documents were stored there. In 1948 he claimed that they had been stolen by an unspecified foreign agency and never found. Despite claiming to be involved in the secret flying disc program as an engineer,  Schriever after the war worked as a simple truck driver. As there is no proof of the Heinkel-BMW flying disc, the whole story seems like a fabrication invented by Schriever. As in his later interview, he claimed to be involved in other projects; it is likely that he was seeking attention possibly from the Allies or simply just bored during a time when Germany was undergoing a slow, painful recovery. To add to the likelihood of the latter, at that time German engineers were highly in demand by the Allies and the Soviets. The US army even organized special operations to bring many German scientists to America, yet Schriver’s claims of the disc aircraft were completely ignored. If being recruited was Schriever’s intention, he failed in that regard. In the end, Schriever’s story ended with his death in 1953, as reported by the German Newspaper, Deutsche Illustrierte

The Real German Circular-wing aircraft

As it is often the case, the reality is often quite disappointing for those who believe in the extraterrestrial and esoteric origins of German flying source projects. Likely the only circular-wing design that reached some operational level was the Arthur Sack Sack AS-6. While even this aircraft had a rather obscure history, it is known that one prototype was completed and tested. Given that this was mostly a one-man project built using salvaged components, it should not come as a surprise that it led nowhere. During testing, the aircraft failed to take off and after a number of improvements, attempts to fly the aircraft were eventually discarded.  The only prototype would be destroyed in an Allied bombing raid. The Horten Ho 229 could technically also be classified as a flying disc aircraft, though by any technical definition, it is a flying wing. Despite some effort put into its development, it remained at the prototype stage. There were many other projects but few went beyond a mock-up stage.

While Arthur Sack’s work was never implemented in mass production, his unusual design was often mistakenly taken as some advanced and secret German World War II project, which ironically, it never was. Source: all-aero.com
The unusual Sack AS-6 circular-wing aircraft. Source: alkeeins.blogspot.com
Few prototypes of the unusual Horten Ho 229 were built and tested during the end of the war. Source: www.ww2-weapons.com
Focke-Wulf wooden mock-up of a VTOL aircraft that has some resemblance with a flying disc. Source: B.Rose and T. Buttler Secret project Flying Saucer Aircraft

Conclusion

Based on the few available information what conclusion could be made regarding this unusual design? Given its supposed secrecy and some element of Wunderwaffe allure, there is no doubt that the project is by all indications, fictional. Given the fact that the Germans allegedly spent years developing such aircraft but did not advance beyond the prototype stage, probably an indicator that the whole concept was likely flawed if it existed in the first place.

In the case of Rudolph Schriever’s work, it is quite certain that his entire involvement in such design was purely made-up after the war. Why he would do so is unclear. It is possible that he tried to get the attention of the Allies. In this regard, he failed, as the Allies probably saw,if they ever bothered in the first place, that the whole story was fake and invented from the start. It is much more likely that Rudolph Schriever simply wanted to do a publicity stunt, as he was probably extremely bored being a truck driver in post-war Germany. In the end, it’s likely that  Rudolph Schriever never suspected that his story would have gone so far, being propelled by the flying saucer craze of the 1950s.

Alleged Heinkel-BMW V7 Specifications
Wingspans 18.3 to 21.3 m
Engine Multiple unspecified jet engines
Maximum Speed 1.200 to 2.000  km/h / 745 to 1240 mph
Maximum Service Ceiling 12.400 m
Crew 2 to 3
Armament
  • None

Illustration

Artist impersonation of the Heinkel-BMW Flying disc

Credits

  • Article written by Marko P.
  • Edited by  Henry H.
  • Ported by Henry H.
  • Illustrated by Medicman 11

Source:

 

Sack AS 6

Weimar and Nazi Germany, WW2, , ,

Nazi flag Germany (1943)
Experimental Circular Wing Aircraft – 1 Prototype Built

The unusual Sack AS-6 circular-wing aircraft [falkeeins.blogspot.com]
In the history of aviation there were many designers who had ambitious ideas and concepts for new designs, but never had the chance to bring their ideas to fruition. On the other hand, there were those who had radical or even completely impractical designs that did manage, at least to some extent, to be built. Germany had a fair share of such individuals, especially during the later stages of the Second World War. These designers may have proposed their projects out of desperation to save their country or in fear of being sent to the front. There were also those that were simply enthusiasts in aircraft development but lacked a better understanding of how aerodynamics actually work. One such person was Arthur Sack (1900-1964), who prior to the war came up with the idea of building a circular-wing aircraft known simply as the Sack AS-6.

History

Prior to the war, Germans were prohibited from developing and building military aircraft. The Germans simply bypassed this prohibition by instead focusing on gliders, but also on civilian aircraft which if needed would be quickly converted for military use and conducted secret experiments. They especially took great care in the development and investment of manned gliders, but also scale model-building competitions and organizations. While this may seem like a waste of time and money, it actually helped gain initial and valuable experience in aircraft development which proved vital for the later Luftwaffe.

One such model competition was the National Contest of Aero Models with combustion engines, held in late June 1939 at Leipzig-Mockau. Here, aviation enthusiast Arthur Sack presented his model of an unusually circular-wing-shaped aircraft named AS-1. It is sadly unclear why Sack pursued the design of such an unusual aircraft design. Due to engine problems, the AS-1 was unable to take off from the ground, so the small model had to be launched by hand instead. The Air Minister (Reichsluftfahrtministerium RLM) Ernst Udet, who was present at the event, seemed to be impressed with this design and advised Sack to continue its development.

Arthur Sack and his AS-1 model. [lvz.de]
Thanks to financial support from the RLM, Sack was able to proceed with the development and even the construction of a few scale models, a process that lasted some three years. In 1943 he submitted a fully operational model SA-5 to the RLM. The presentation went well for Sack and the RLM commission provided the necessary funds for the construction of a fully operational prototype. Interestingly, at some point Sack came into contact with another unusual aircraft designer Dr. Alexander Lippisch. While not completely clear, it appears that Sack received some design tips from Lippisch, to better improved his work.

With the order secured, Sack initiated the construction of a prototype. He named this aircraft the AS-6 V1 (Versuchs – version). As he had no proper workshop to build the aircraft himself, the glider manufacturer Mitteldeutsche Metallwerke was tasked with this instead. The initial work for the assembly of the aircraft began in the autumn of 1943. It took nearly half a year to complete the working prototype. Interestingly, due to the general shortage of materials, the AS-6 was constructed by utilizing a considerable amount of salvaged components from other damaged aircraft. For example, the cockpit canopy and parts of the interior were taken from a Bf 109B. Once the prototype was ready, it was allocated to the Luftwaffe for initial tests in early 1944.

AS-6 side view. [lvz.de]

Technical Characteristics

A good view of the AS-6 internal wooden frame construction.[all-aero.com]
The AS-6 was designed as an experimental prototype to test the idea of using circular-wing design. Sadly, this aircraft is quite obscure and poorly documented so not much is known about its overall design. It was a single-seater aircraft that was mostly built out of wood. It did not have a classical fuselage, instead, the majority of the aircraft consisted of two large circular wings. The internal design is more or less conventional with a wooden construction frame being covered with canvas. Two large elevators were installed on the rear of the wings. The tail assembly is a conventional design as well, consisting of one vertical stabilizer and two horizontal stabilizers.

The AS-6 rearview. The two elevators were too small, poorly designed, and did not provide adequate control during initially limited test flights. [all-aero.com]
The AS-6 was powered by an Argus As 10C-3 engine, which ultimately proved to be inadequate [all-aero.com]
The AS-6 was powered by a 240 hp Argus As 10C-3 engine driving a two-blade wooden propeller. The engine was housed in a metal frame, which was then bolted to the AS-6 fuselage. The engine was salvaged from a Bf 108 aircraft.

The cockpit canopy and its interior, as already mentioned, were taken from a Bf 109B. The cockpit was slightly elevated above the fuselage and provided the pilot with an excellent all-around view. The landing gear was also salvaged from a Bf 109B, but in the case of the AS-6, it was fixed. Initially, a landing skid was used on the rear, which was later replaced with a landing wheel instead.

The canopy and landing gear was taken from a damaged Bf 109 aircraft [ufxufo.org]

Testing the Prototype

Initial evaluation tests of the AS-6 prototype were conducted at the Luftwaffe Brandis Airbase. The flight tests were conducted by Rolf Baltabol Junkers test pilot. While several short take-offs were made, there were no attempts to actually take the aircraft to the sky. The test pilot noted that the aircraft had an overall poor design and was difficult to control. He urged that the control surfaces and rudder be completely redesigned. The engine was also deemed too weak. During the last short take-off, one of the two landing gear assemblies was damaged.

The AS-6, following its unsuccessful start, spent several weeks in repairs and received a number of modifications in an attempt to improve its performance. These included adding an additional 70 kg of weight to the rear, installation of brakes taken from a Ju 88, and repositioning the landing wheels to the rear by about 20 cm. Sack proposed moving the landing wheels further back, but the test pilot Rolf simply refused to fly it if this change was implemented. He argued that placing the landing gear to the rear would imbalance the aircraft potentially leading to tipping forward during a take-off. For this reason, the modification was not implemented. While the engine was underpowered, there were simply no alternatives available at that time.

The AS-6 during testing [falkeeins.blogspot.com]
The next test was scheduled for April 1944. During these tests, Rolf tried to take it to the sky, but failed again to do so. This time it was noted that the wings were simply too short. Further tests were canceled, the AS-6 was to await more modifications, and was to be tested in a wind tunnel; if possible with a completely new engine.

The fate of the AS-6

Following the unsuccessful testing, the AS-6 was stored at the Brandis airfield. In the summer of 1944, this airfield became the main operational base for the experimental Me 163 rocket-powered aircraft. The pilots of the I./JG 400 (charged with testing the Me 163) found the AS-6. One of its pilots, Franz Rossle, expressed a desire to attempt flying the unusual plane. But when the ground crew was preparing the aircraft for take-off, one of its landing gear units simply broke due to rough terrain, effectively preventing the test flight to be conducted. After this, it was once again stored at Brandis. It would remain there until early 1945 when it was lost in an Allied bombing raid.

The AS-7 project

While not clear when (possibly during early 1945), Sack approached Messerschmitt company with a proposal to use his circular-wing design on the Bf 109K-4 aircraft. The aircraft marked as SA-7 would be powered by a DB 605 2,000 hp engine. Fitted with circular wings it was theorized that it would be capable of carrying more armament inside the wings. It is believed (but not clear) that Messerschmitt was interested in this proposal and designated the project Me 600. Due to the war’s end, nothing really came from this project.

Conclusion

While certainly an unusual and interesting design, due to poor quality and salvaged materials used during its construction, the AS-6 performed poorly and never actually achieved flight. We will never know if the AS-6 circular-wing design offered any major advantage over more conventional wing designs. It appears that Arthur Sack did not continue with his idea after the war and passed away in the mid-1960’s. While his work was never implemented in mass production, his unusual design was often mistakenly taken as some advanced and secret German World War II project, which ironically, it never was.

AS-6 Specifications
Wingspan 16 ft 5 in / 5 m
Length 21 ft / 6.4 m
Wing Area 19.62 ft² / 211 m²
Engine One 240 hp Argus As 10C-3 engine
Maximum Take-off Weight 1,984 lbs / 900 kg
Crew 1 pilot
Armament
  • None

Gallery

Illustration by Ed Jackson

Credits

  • Written by Marko P.
  • Edited by Henry H. & Blaze
  • Illustrated by Ed Jackson

Sources

  • B. Rose and T. Butler (2006) Secret Projects Flying Saucer Aircraft, Midland Publishing
  • J. Dennis G.G. Lepage (2009) Aircraft of the Luftwaffe 1935-1945, McFarland and Company
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  • http://www.luft46.com/misc/sackas6.html

USAF Type 17 Weather Balloon

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sweden flag United States of America (1946)
Weather Balloon – Around 2,000 Built

The best publicly available photograph of a Type 17 in action and with its tether still intact. This photo was taken over a mountain range and is close enough to the ground that the USAF logo is barely visibly on the underside. Some of these balloons would have this marking while others did not. [Authors Personal Collection]
The United States Air Force Type 17 Weather Balloon was an experimental and highly secretive weather balloon that used a saucer shape balloon design and █████ technology to test the airworthiness of the “strange” shape. The design however, proved to be more unstable than anticipated, and with a flaw in the cable design, led many of these balloons to break free and travel some distance away. These “escaped” Type 17s can be considered responsible for the “UFO sighting craze” of the late 1940s and 1950s.

History

The immediate post Second World War aviation industry was an incredibly interesting time. Many new radical concepts were being tested, with jet engines, helicopters, and many other advanced designs coming to light. Although not extensively discussed, many different types of lighter-than-air aircraft designs were also tested, but many of these have been either lost or forgotten. One of the most peculiar designs that is known is the USAF Type 17 Weather Balloon.

The origins of the Type 17 start right at the beginning of 1946. With spherical weather balloons in use for quite some time, officials at the USAF began looking to see if some other balloon shape would be more efficient than the spherical design. It was thought that maybe a saucer shape could possibly offer better stability in the wind. Work began on creating the first prototype Type 17 on April 3rd, and a first test flight was scheduled for the 9th but had to be postponed for 2 days due to inclement weather. Balloon 1 went up on April 11th with no issues and achieved an altitude of around 30,000 ft (9.1km). The problem however, was that the location, where it was first tested, was extremely close to many residential areas, and although there wasn’t a report of a “flying saucer” in the area of the test flight, the USAF decided it would be best to move testing of the aircraft out to New Mexico, where other secret aircraft projects were being tested away from the eyes of the public. Thanks to the success of the first flight, a production order of around 1000 was made.


A loose Type 17 captured over New Mexico. Most of these balloons where tested here.

By June, construction of around two-thirds of the Type 17s was complete, and were now being introduced to the various bases in New Mexico, with a few also being sent to bases in Nevada, Texas, Arizona, and it is known that possibly one was sent to NORAD Headquarters in Colorado. Testing continued without issues until the first of many incidents occurred on December 29th. During a routine flight, balloon 134 was sent aloft, but the cable connecting the balloon suddenly broke, and 134 was thrown by the wind similar to a frisbee. The balloon was sent almost 30 miles east and crashed in the middle of the desert. It took the USAF almost 3 days to find the remains. It was then found that the cables designed for the Type 17 had a fatal flaw. Over time, the low quality synthetic material it was made out of would eventually disintegrate, leaving the balloon to be blown away in the wind. Sometimes, the balloon would be blown in such a way, due to its shape, that it could be described as performing maneuvers that “no manmade craft could do”. This flaw was largely ignored for the first few months upon discovery, but by March of 1947, more and more balloons were being lost, and soon, reports from civilians of alien spacecraft in the desert began to emerge more and more. In some cases, multiple Type 17s would break off at once, making it appear there were entire squadrons of flying saucers over the desert. It was decided that for a few months, all Type 17s would be grounded.

Operations continued in the summer, with many now having improved cables. Despite these newer cables, many air force bases still would use the older defective cables due to an error in communication. To curb the loss of the Type 17, they were ordered to operate at a lower altitude than before. This way if the balloon was lost, it wouldn’t be swept as far by the wind, but coming at the cost of being more visible. Also in the summer, the USAF introduced the Type 17A, a larger version over the base model. As more and more of the UFO craze of 1947 came to the public, the Type 17 was once again used less and less to draw attention away from the program. While the fleet of Type 17s were grounded, a further development on the design was made in early 1948 as the Type 17B. The B used the same larger body as the Type A, but had a larger cylinder-shaped top that allowed it to carry even more instruments.

A loose Type 17 captured over New Mexico. Most of these balloons where tested here.

While the fleet was grounded, more of the newer cables were finally distributed to stop the balloons from breaking off. In the summer of 1948, operations would continue a lot more smoothly than the previous years thanks to the stronger cables. The Type 17 and its variants would continue to be used over the years, it is unknown when they would stopped being used completely, but it is known that a handful of Type 17s would be used for mid-air target practice by the USAF. This was at one point observed by a civilian who was trespassing on USAF property, witnessed what he claimed to be a “USAF F-86 dogfighting with an alien spacecraft”.

At some point during its operations, a version of the Type 17 was made to be manned to test high altitude pressure suits for NASA’s budding space program. From what little is known of this project, during one of these manned flights on this Type 17C, the defective cable was used and broke. The pilot in the cupola of the balloon was carried for miles with the wind, landing in a field outside of a farmer’s house. The pilot was eventually picked up a few hours later, after being mistaken for a “spaceman,” he finally convinced the owner of the farm to borrow their landline phone. The Type 17C was taken back to base as well, even if it was damaged from the impact, and supposedly had a handful of holes that matched the entry of a .22 caliber bullet. This incident is cited by many to be an encounter with an “alien spaceman.” After this, safer ways of testing the suits were used instead, and the pilot who had to endure this incident and subsequent crash was reimbursed with a cache of beer and whiskey as a reward.

There is also mention of an unconfirmed Type 17D that would test an experimental ████████ ███████-████████ engine at ██████ ███, ██. This supposed variant could reach ████ mph (████ km/h) and is claimed to have █████ and ████ around it. Details on this design are extremely sparse and the only visual we have of it is based off a napkin drawing from former USAF aeronautics engineer, ████ ████.

The Roswell Incident

Major Jesse A. Marcel posing with the second half of the debris from Balloon 678 on July 8, 1947. [Wikipedia]
The most famous of the Type 17 incidents happened in early July of 1947 near Roswell, New Mexico. On July 1st, men at Walker Air Force Base, 3 miles from Roswell, sent balloon number 678 up for a few tests. Due to a strong wind that day, and the deterioration of the cable connecting the balloon, 678 broke free and traveled extremely close to Roswell before crashing nearby. The men at Walker AFB were quick to act and quietly recovered what they thought was most of the debris. However, upon impact, the balloon had been torn in half, with only a single half of the aircraft being recovered. The second was thrown even further away by the wind and wasn’t recovered until July 8th. By this point however, the people of Roswell had already caught glimpses of the vehicles used to collect it and a report was done in the local newspaper that day of a claimed alien spacecraft crash landing nearby. To at least alleviate this claim, once the remains of balloon 678 were taken to Fort Worth,Texas, a publicity photo was done to show that the craft was just a simple weather balloon, and not anything of alien or supernatural nature. This whole incident is widely popular in ufology, despite there being obvious evidence that it was a Type 17 balloon that crash landed.

Design

Supposedly a photograph of a Type 17A that had broken free. This photo is stated to be from New Jersey. Its interesting to note that Type 17s operated almost nowhere near this state, but it is entirely plausible one was able to break free and fly so many miles away that it could reach this state. [Wikipedia]
The Type 17 was a weather balloon designed for high-altitude flight. The balloon had a flat, saucer shaped body made of aluminum-infused rubber. On the underside of the craft was sometimes painted the USAF symbol and the production number of the balloon. At the top of the balloon was a rounded hump that carried most of the onboard instruments. This hump is often mistaken for some sort of “cockpit” by ufologists. At the very bottom was the connection point that had the radiosonde attached. The balloon was both tested with hydrogen and helium, but it would primarily use helium as its main gas source. On the underside is where the gas valve was filled from. The balloon was connected to the ground via a cable. Instead of a steel cable, a newer synthetic material was used at first, but it was found it corroded very fast and broke easily because of this. A stronger synthetic connection cable was created for the craft around the time of the Type 17A being created.

Several variants of the Type 17 exist. The first of these was the Type 17A, which had the same design but was much larger. The increase in size was done to stabilize the design more and around 100 of these were built. The second was the Type 17B. A derivative of the Type 17A, the B was the exact same size but the instrument “dome” was enlargened to a more cylindrical shape to carry more onboard instruments. The final design was the Type 17C. No photographs exist of this design and details are sparse, but it is known to have had either an A or B design for the balloon, but beneath it was an enclosed gondola that a man could sit in.

Conclusion

The Type 17 was at least known to have still been in use by the mid 1950s. Eventually it was decided that the Air Force should return back to more spherical shaped balloons. Balloons that would cause less of a panic than the saucer shaped 17. After the program was finished, all Type 17s and many of the documents relating to the program were destroyed by the USAF, some say it was out of embarrassment. The last reported use of the Type 17 was in 1957.

 

The Type 17 was an interesting attempt to create a new and improved weather balloon design, but was more of a flop that caused more panic than progress. Due to the poor cable integrity and strange shape, the amount of Type 17s lost is uncountable, and it can be assumed that hundreds of this type are most likely scattered across the deserts and lands of America.

If you ever happen to be out exploring near where the Type 17 operated, and come across material or remains you believe to be related to the Type 17, please contact the United States Department of ████████ at 1-███ ███ ████. Thank you for your cooperation.

Variants

 

  • Type 17– Base model of the Type 17
  • Type 17A – A second design that was slightly larger than the base design. Only around 100 of these type were made.
  • Type 17B – Variant of the Type 17A that had a larger instrument dome that was more cylindrical in shape to carry more instruments. It is known only around 10 of these were built. 1 was confirmed lost.
  • Type 17C – A mysterious 3rd design. Details are sparse on this but supposedly this was an attempted manned version to test high-altitude pressure suits. Beneath the balloon was an enclosed gondola for the test pilot.
  • Type 17D – An unconfirmed 4th design that supposedly tested ██████ ████████ at ████████ ████████, ██████. It could supposedly achieve speeds of ████ mph (████ km/h).

Operators

 

  • United States of America – The Type 17 was operated by the United States Air Force for weather research and performance testing. It operated from 1946 to at least 1957.

Type 17 Weather Balloon Specifications
Diameter 65 ft / 20 m
Height 17 ft / 5.1 m
Maximum Service Ceiling Around 35,000ft / 10668 m
Gas Type Hydrogen or Helium
Material Aluminum-infused Synthetic Rubber
Maximum Speed (Type 17D) ████ mph / ████ km/h
Equipment
  • Type 17 Radiosonde
  • Mk33 Radar Antenna
  • Various other meteorological tools

Gallery

Sources

  • Joe Rogan Experience #1315 – Bob Lazar & Jeremy Corbell
  • Joe Rogan Experience #1510 – George Knapp & Jeremy Corbell
  • Johnsmith, Joe (1988), The Truth Behind the 1947 Saucer Craze: How a Balloon Tricked America. MIB-Books
  • Lovejoy, Erik (2022), How Balloons Ruined My Life and How They’ll Ruin Yours!, MM-PUB.
  • Nermal, Abbey (2003), USAF Aircraft in Detail: The Type 17 Weather Balloon, Greasy PUB.
  • Wikipedia
  • Some of the info was revealed to me in a dream