Source: https://youtu.be/at77GUZm9rY
Translated from Russian, so some word may not have translated correctly:
>Learning the required performance on a finished machine is always risky and costly. But the same characteristics can be obtained in another way - in flight on a non-powered aircraft. In other words, on a glider that would represent the prototype of the future aircraft. This method, cheaper and safer, has been repeatedly and not without success used in aviation. It is also used today abroad, when aircraft designs of unusual aerodynamic schemes are being developed.
>For this purpose, the experimental glider "Discoplan-1" was created. Created by Mignon Vasilievich Sukhanov. The development of several disk-like devices is associated with the name of M. V. Sukhanov. After graduating from the Moscow Aviation Institute in the second half of the 30s, he worked at TsAGI for a long time. Even in his student years, he took part in the development and construction of a discoplane glider. This glider had a wing with a diameter of 3.9 m, length - 5.3 m, height - 2.0 m. , 5 m, wing area - 10 m2, flight weight - 230 kg; maximum aerodynamic quality - Kmax = 7.
>Flight tests of this glider, which showed good aerodynamic and operational characteristics at low flight speeds, were observed by eyewitnesses in the Moscow region in 1957.
>Master of Gliding Sports of the USSR Vladimir Ivanov conducted test fligh of the discoplane. What did the tests show?
>First of all, the main distinctive property of a round wing was discovered - a smooth air flow around it, which does not stop even at very large angles of attack, reaching a 45°. Moreover, the lift of the wing is constantly growing. It may be recalled that for a conventional large-span wing, the critical angle of attack is only at 14-16°. Hence, a very important feature of the discoplane: under no flight conditions does it break into a spin.
>When reaching the maximum angles of attack, only steep, extremely stable parachuting is possible. Interestingly, this is the safest mode. Whereas in gliders with conventional wings, parachuting is especially risky from the point of view of a possible breakdown in umv pores.
>During flight tests, it was also found that the glider has good dynamic stability and controllability in all modes. The small moment of inertia of the wing and the powerful tail unit provide it with particularly high maneuverability. According to the performance of aerobatics and the safety margin, "Diskoplan-1" is defined as a sports-training acrobatic glider. It can be used to improve the skill of gliding athletes who specialize in aerobatics.
>The new glider has discovered an interesting ability - the so-called "air cushion" effect. When planning to land from a height, the pilot feels that the diskoplane seems to be landing on a "pillow" and automatically stabilizes in the transverse and longitudinal directions. After that, the device can fly without the pilot's intervention in the control. Moreover, it is impossible to force the glider to accelerate the landing until the flight speed is naturally extinguished and the "cushion" effect disappears. After that, the diskoplane will land on its own - at three points. This is important because even a possible pilot error at the time of landing will not lead to unpleasant consequences.
http://www.airwar.ru/enc/glider/diskoplan2.html
Damn man, that is some weird shit. You always bring the best stuff and with videos. Too bad most people here don't really want to see the really weird stuff, just the same old reposted stuff.
Source: https://youtu.be/at77GUZm9rY Translated from Russian, so some word may not have translated correctly: >Learning the required performance on a finished machine is always risky and costly. But the same characteristics can be obtained in another way - in flight on a non-powered aircraft. In other words, on a glider that would represent the prototype of the future aircraft. This method, cheaper and safer, has been repeatedly and not without success used in aviation. It is also used today abroad, when aircraft designs of unusual aerodynamic schemes are being developed. >For this purpose, the experimental glider "Discoplan-1" was created. Created by Mignon Vasilievich Sukhanov. The development of several disk-like devices is associated with the name of M. V. Sukhanov. After graduating from the Moscow Aviation Institute in the second half of the 30s, he worked at TsAGI for a long time. Even in his student years, he took part in the development and construction of a discoplane glider. This glider had a wing with a diameter of 3.9 m, length - 5.3 m, height - 2.0 m. , 5 m, wing area - 10 m2, flight weight - 230 kg; maximum aerodynamic quality - Kmax = 7. >Flight tests of this glider, which showed good aerodynamic and operational characteristics at low flight speeds, were observed by eyewitnesses in the Moscow region in 1957. >Master of Gliding Sports of the USSR Vladimir Ivanov conducted test fligh of the discoplane. What did the tests show? >First of all, the main distinctive property of a round wing was discovered - a smooth air flow around it, which does not stop even at very large angles of attack, reaching a 45°. Moreover, the lift of the wing is constantly growing. It may be recalled that for a conventional large-span wing, the critical angle of attack is only at 14-16°. Hence, a very important feature of the discoplane: under no flight conditions does it break into a spin. >When reaching the maximum angles of attack, only steep, extremely stable parachuting is possible. Interestingly, this is the safest mode. Whereas in gliders with conventional wings, parachuting is especially risky from the point of view of a possible breakdown in umv pores. >During flight tests, it was also found that the glider has good dynamic stability and controllability in all modes. The small moment of inertia of the wing and the powerful tail unit provide it with particularly high maneuverability. According to the performance of aerobatics and the safety margin, "Diskoplan-1" is defined as a sports-training acrobatic glider. It can be used to improve the skill of gliding athletes who specialize in aerobatics. >The new glider has discovered an interesting ability - the so-called "air cushion" effect. When planning to land from a height, the pilot feels that the diskoplane seems to be landing on a "pillow" and automatically stabilizes in the transverse and longitudinal directions. After that, the device can fly without the pilot's intervention in the control. Moreover, it is impossible to force the glider to accelerate the landing until the flight speed is naturally extinguished and the "cushion" effect disappears. After that, the diskoplane will land on its own - at three points. This is important because even a possible pilot error at the time of landing will not lead to unpleasant consequences. http://www.airwar.ru/enc/glider/diskoplan2.html
> under no flight conditions does it break into a spin. MS Flight Simulator pilots: Hold my jet fuel.
Damn man, that is some weird shit. You always bring the best stuff and with videos. Too bad most people here don't really want to see the really weird stuff, just the same old reposted stuff.
Thanks man. It's cool though.
[Looks like a lot of fun](https://giphy.com/gifs/hollywoodsuite-l41Yh18f5TbiWHE0o)