On Tuesday, September 11, 2018 at 12:26:48 AM UTC-4, Eric Greenwell wrote:
George Haeh wrote on 9/10/2018 12:57 PM:
So how does one demonstrate or practice a spin or incipient spin without "misusing" the rudder?

[Puchaz excepted]

In my ASW 20C and ASH 26 E, I could easily get a wing drop from coordinated
flight. I never let either enter a full spin, but always recovered at less than a
quarter turn. Easy to do: I circle at about 20 degree bank while continuously
slowing down, always maintaining coordinated flight; at some point as I slow, the
inner wing will drop and can not be picked up with the ailerons. So, spin entry
with no rudder misuse, just flying too slowly in a turn.

The above is harder to do at 30 degree bank, and I couldn't get it too happen at
40-45 degree bank. I did not experiment with different CG positions - mine was a
bit towards the aft side, but not near the rear limit.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1
- "Transponders in Sailplanes - Dec 2014a" also ADS-B, PCAS, Flarm

http://soaringsafety.org/prevention/...anes-2014A.pdf

It is worth remembering that the inside wing in a turn is flying at a higher angle of attack than the outer wing. They are both descending at the same rate, but the inner wing is slower due to flying a shorter path. Add in the expectation that there is probably a small amount of top aileron to counteract the over banking tendency,and one can see why the inner wing will stall first and an incipient spin can result.
UH