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#17
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On 11/22/2016 8:20 PM, Eric Greenwell wrote:
Bruce Hoult wrote on 11/19/2016 12:50 AM: Define "coordinated". No problem to spin with the string perfectly centered. It's true in any glider with enough elevator, but the Blanik is excellent for demonstrating it. Shallow turn, very graaaadually slow it down, maintaining constant bank angle with aileron and keeping the string in the middle with the rudder. Pretty soon you've got a whole heap of out of turn aileron and into turn rudder. But the string is in the middle and the nose isn't even very high. And then BAM full-on incipient spin. Bruce describes how I practice incipient spins in my ASH 26 E (also the way I practiced them in my ASW 20 C). One moment I'm doing a smooth, coordinated turn; an instant later, the inboard wing is rotating down - no warning. Blame this somewhat-thread-drifting post on winter finally trying to put in an appearance in this part of the northern hemisphere... I'm guessing what Eric's "no warning" comment means is "in the absence of a distinct separation-induced burble," or something similar (I've not flown either an ASW 20 or ASH 26). I'm gonna "winter-quibble" with the concept "no warning." My club used to have a 2-32 (eventually sold) about which the same thing was routinely said, and in fact the ship did routinely and enthusiastically drop the same wing before beginning a rapid rotation if not "immediately and properly countered." If it really did catch someone out, going through at least 90-degrees of an incipient spin, and WAY nose down before recovery - was in your immediate future. Many club pilots of roughly equivalent time as I then had might accurately have been described as "unduly frightened" of the ship. But "no warning?" Surely you jest (and my name isn't Shirley). True, before the wing "let go" there was (almost always) an absence of aerodynamic burble felt through the stick or one's butt or merely "drummed" through the metal fuselage, but by the time the wing did let go, "all the other usual suspects" had put in their appearances: low wind noise; nose noticeably high; controls (especially stick) getting sloppy; etc. Subsequent to checking out in the ship, I found it "intellectual fun" to mess around with it in slow flight "trying to find the burble." Abrupt departure from controlled flight - yes, indeed! "No warning?" - not by a long shot. Bob - a big fan of coordination AND "sufficient airspeed" - W. |
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