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Too many accidents
Just to correct a couple of misconceptions about the ASK21 and spinning.
It WILL spin without the use of a spin kit, it just needs a rearward CofG. Normally (but not always) with an instructor on board the CofG will be to far forward but once the pupil goes solo then that can be a very different matter! Any talk that an aircraft is unspinable is the type of thing that can lull trainees into a false sense of security. As for the comment that it make a good spin trainer with the spin weights I would have to disagree. Its spin entry and recovery are inconsistent even at the same CofG. If you look at the updated flight manual even the spin recovery is non-standard. Note the point that says "Warning: Fall forward stick may retard or even prevent spin recovery" https://www.alexander-schleicher.de/..._TM23_E_HB.pdf If your not careful you are training pilots with a recovery technique that will not work for all other aircraft. At 08:41 14 September 2018, Steve Thompson wrote: Referring to the ASK21 TM4b, publicly available on the AS site. I see on page 4 : "By following the spin ballast table a c.g. of approx. 406 mm (16 inch) is set in for the flight." As far as I can tell from other data, this is not the aft limit. I believe the aft limit is 469mm. The USAF spinning tests are well documented in the technical note flight manual and discusses inertia effects as well as just CG position effects. 406mm is aft enough. At 23:32 13 September 2018, Andreas Maurer wrote: On Mon, 10 Sep 2018 08:56:05 -0700 (PDT), krasw wrote: maanantai 10. syyskuuta 2018 16.54.53 UTC+3 kirjoitti: Un-spinable? You might want to watch this and look up the USAF report conducted on the spin characteristics of the ASK-21. https://www.youtube.com/watch?v=yXH6XDxQdPY ASK21 is unspinable unless you equip with spin kit designed to move cg well aft of normal limits. Without this kit you cannot spin 21. One addition: The spin weights put the CG to the normal aft limit, but not beyond it. This is the same CG that you would have if a light pilot flies without a copilot. With the spin weights the ASK-21 is an excellent spin trainer. Cheers Andreas |
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