https://peertube.dngr.us/videos/watch/76aa5c6d-3daa-4a8b-9a4f-04eae675ab49 This 1945 US Navy Training Film, QUIT STALLING - - OR SPIN IN! (MN-4353a) teaches pilots how to avoid stalls and spins, which were resulting in more pilot deaths than enemy gunfire. (00:01:25:00) Amazing vintage crash footage can be seen at (00:00:17:00). A far off crash can be seen at (00:07:07:00). Vintage wreckage shots can be seen at (00,00:27:00) , (00:04:28:00) , (00:13:03:00) , (00:14:12:00) and a proper landing can be seen at (00:16:25:00). Footage of an amazing spin caused by an actual instructor can be seen at (00:08:12:00). Footage of more accidental spins can be seen at (00:01:40:00) , (00:06:23:00) , (00:06:40:00) , (00:10:25:00) , (00:11:38:00) , and (00:12:20:00). A normal spin can be seen at (00:15:18:00). More amazing plane footage can be seen at (00:12:39:00). A botched dive-bombing run can be seen at (00:14:00:00). Visual examples of different types of botched flights and landings can be seen at (00:03:55:00) , (00:04:50:00) , and (00:05:20:00) , including an actual shot of a plane falling off an aircraft carrier at (00:05:42:00). In fluid dynamics, a stall is a reduction in the lift coefficient generated by a foil as angle of attack increases. This occurs when the critical angle of attack of the foil is exceeded. The critical angle of attack is typically about 15 degrees, but it may vary significantly depending on the fluid, foil, and Reynolds number. Stalls in fixed-wing flight are often experienced as a sudden reduction in lift as the pilot increases the wing's angle of attack and exceeds its critical angle of attack, which may be due to slowing down below stall speed in level flight. A stall does not mean that the engine has stopped working, or that the aircraft has stopped moving, the effect is the same even in an unpowered glider aircraft. Vectored thrust in manned and unmanned aircraft is used to surpass the stall limit, thereby giving rise to post-stall technology. Because stalls are most commonly discussed in connection with aviation, this article discusses stalls as they relate mainly to aircraft, in particular fixed-wing aircraft. The principles of stall discussed here translate to foils in other fluids as well... A stall is a condition in aerodynamics and aviation wherein the angle of attack increases beyond a certain point such that the lift begins to decrease. The angle at which this occurs is called the critical angle of attack. This critical angle is dependent upon the profile of the wing, its aspect ratio, and other factors, but is typically in the range of 8 to 20 degrees relative to the incoming wind for most subsonic airfoils. The critical angle of attack is the angle of attack on the lift coefficient versus angle-of-attack curve at which the maximum lift coefficient occurs. Flow separation begins to occur at small angles of attack while attached flow over the wing is still dominant. As angle of attack increases, the separated regions on the top of the wing increase in size and hinder the wing's ability to create lift. At the critical angle of attack, separated flow is so dominant that further increases in angle of attack produce less lift and vastly more drag. A fixed-wing aircraft during a stall may experience buffeting or a change in attitude. Most aircraft are designed to have a gradual stall with characteristics that will warn the pilot and give the pilot time to react. For example, an aircraft that does not buffet before the stall may have an audible alarm or a stick shaker installed to simulate the feel of a buffet by vibrating the stick fore and aft. The "buffet margin" is, for a given set of conditions, the amount of ‘g’, (00:02:00:00) which can be imposed for a given level of buffet. The critical angle of attack in steady straight and level flight can be attained only at low airspeed. Attempts to increase the angle of attack at higher airspeeds can cause a high-speed stall or may merely cause the aircraft to climb. Any yaw of the aircraft as it enters the stall regime can result in autorotation, which is also sometimes referred to as a 'spin'. Because air no longer flows smoothly over the wings during a stall, aileron control of roll becomes less effective, while simultaneously the tendency for the ailerons to generate adverse yaw increases. This increases the lift from the advancing wing and accentuates the probability of the aircraft to enter into a spin. This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD and 2k. For more information visit http://www.PeriscopeFilm.com Source: https://www.youtube.com/watch?v=YlK6RDDK1Uw Mirrored from Periscope Film (https://www.youtube.com/@PeriscopeFilm) Fri, 12 Jun 2026 03:36:50 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://peertube.dngr.us https://peertube.dngr.us/lazy-static/avatars/41a6fee9-7f57-42d0-a5fc-5db4f1af2e31.png https://peertube.dngr.us/videos/watch/76aa5c6d-3daa-4a8b-9a4f-04eae675ab49 All rights reserved, unless otherwise specified in the terms specified at https://peertube.dngr.us/about and potential licenses granted by each content's rightholder.