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rlborger(at)mac.com
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 Posted: Tue Jun 19, 2007 6:48 am Post subject: turning stall, was 180 turn |
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William and other Europaphies,
I can't speak directly for the Europa as mine is still 10 - 12 weeks from flying. But my experience in the C-150, Champ & Supercub was pretty much the same. Granted, they are not aircraft with laminar flow wing sections, but it's the best I can do right now. Never tried them in the Tri-Pacer, Colt or any of the Cherokee types or the Diamonds.
1: Stall in a coordinated turn, ball centered - high wing stalls first, aircraft rolls level in the stall as the nose drops. Maybe a bit more than typical altitude loss. Nothing evil happens.
2: Stall in a slipping condition, ball outside - high wing stall first, aircraft rolls level in the stall as the nose drops. For sure, a bit more than typical altitude loss. Nothing evil happens.
3: Stall in a skidding condition, ball inside - low wing stalls first, aircraft rolls near inverted as the nose drops. Huge altitude loss. Could spin if there is sufficient altitude. This is usually performed on the overshot base to final turn where extra rudder is used to encourage the nose around. If that is the situation, you will hit the ground inverted as there is no possible recovery.
Later this year, I'll report on what N914XL does in these situations as I will be testing them with plenty of altitude during my 40 hours of test flying.
I hope this helps,
Bob Borger
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asarangan(at)YAHOO.COM
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| Posted: Tue Jun 19, 2007 8:16 am Post subject: turning stall, was 180 turn |
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I have learned from experience that stall characteristics are very
specific to each airframe. There are only generic similarities across
the same model. Even in the ubiquitous Cessna 172, the stall
characteristics may appear to be consistent during an imminent stall,
but if you push it deeper into a stall, or an uncoordinated stall, the
characteristics are not at all similar. On an experimental
construction, I would expect these variations to be more drastic than
in production models.
As soon as I heard about this accident, I looked at the google
satellite map of Livermore airport and wondered why he was tempted to
make a 180. If the golf course had people in it that might be one
reason, but it looks like there are quite a few cow pastures slightly
left of course, and some shallow lakes (reservoirs?) further left.
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