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Nelson Funston
A disconnected aileron will move when the flaps are moved, the problem
could have been that when the flaps were moved from negative to positive, right after lift-off, this may have allowed the short push- rod in the fuselage to drop down and jam against something! If you move a control (flaps) and something unexpected happens (ship rolls left), put the control you just moved...........back where it was! Or, here's an even better idea............do a critical assembly check! JJ On Jun 3, 1:40*pm, Eric Greenwell wrote: Ramy wrote: I hope we don't need to wait for the NTSB report, we all know what they worth. Or Thelen's accident reports in Soaring Magazine, which from some reason he can never get the details from those involved, and have to speculate. I wish Nelson speedy recovery. Ramy No need to speculate anymore. According to the NTSB report it was disconnected aileron http://www.ntsb.gov/NTSB/brief2.asp?...9&ntsbno=SEA08.... I hope Nelson is recovering fine. Ramy (who wonders why we had to wait for the NTSB report to learn this) Ramy's link didn't work for me, but this link did: http://www.ntsb.gov/ntsb/brief.asp?e...02X00759&key=1 I've always believed that a disconnected aileron would not lead to loss of control at speeds close to and above takeoff speed, and that the danger was flutter at higher speeds. The glider would not respond as quickly at low speeds, of course, but I thought it could still be held level, turns could be made, and even spoilers used. Perhaps that is not true, at least for the Nimbus, or perhaps the control was operating and then fully disconnected, allowing the left wing to drop. Can someone familiar with the Nimbus 4 M control hookups explain what happens to the aileron if it is not hooked up at the fuselage? Does it droop, does it move with the controls at all? Can it be partially connected so it would appear to operate? Does it move with the flaps; e.g., it the flaps were in negative during the takeoff roll, then moved to positive to lift off, would this induce a roll to the left because the left aileron did not follow the flaps into a positive setting? -- Eric Greenwell - Washington State, USA * Change "netto" to "net" to email me directly * Updated! "Transponders in Sailplanes"http://tinyurl.com/y739x4 * * * New Jan '08 - sections on Mode S, TPAS, ADS-B, Flarm, more * "A Guide to Self-launching Sailplane Operation" atwww.motorglider.org- Hide quoted text - - Show quoted text - |
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