On Fri, 10 Dec 2004 09:53:51 +1030, you wrote: > Just remind me. > > Are glider types supposed to be spin recoverable (i.e. using standard spin > recovery techniques) before being certified for flight in Australia? Who > does the flight testing? > > People have oft quoted the JAR's that cover this (isn't it limited to a > certain number of complete rotations in spin?). > > If the Puchacz is such a worry, why isn't it retested in spin by a competent > test pilot to try and put the issue of its danger to bed? (For that case, > why aren't all the other twin seater training aircraft in Australia > (obviously apart from the expense of it all)). > > Also, as the number of rotations in a spin increases, the rotational kinetic > energy will build up and the spin will flatten, i.e. recovery may take a > couple of rotations to be acheived so long as correct spin recovery is used. > Aeronautical engineering types please comment.
Once the spin has stabilised, i.e. spin rate constant, there will be no further increase in kinetic energy. How many turns are needed to reach this condition will probably be dependant on many variables. Whether the spin will gradually flatten after numerous rotations, I don't know, but suspect it will also depend on many variables, including actual C of G position and the aerodynamics of the particular aircraft. Cheers, John G. _______________________________________________ Aus-soaring mailing list [EMAIL PROTECTED] To check or change subscription details, visit: http://lists.internode.on.net/mailman/listinfo/aus-soaring
