Was it aileron flutter he saw (and heard) or loose fabric?
On 30/9/09 08:15, "Hartmut Beil" <[email protected]> wrote: > > Ralph. > > I have the same doubts about the eye witness account. > > It is almost impossible to see any detail of a plane that flies 1200 feet > above you. > Now, the plane might have been directly above the witness and maybe the sun > was in an angle that mirrored. > But the breakup occurred at 11:15 local time I think, ( If it would be Zulu > time, the flight would have happened at 6 A.M in the morning), so at least the > report. > This is the worst time to see anything against the sky. > > Anyhow. Maybe he could see the detail. If both ailerons were to flutter, the > whole control system was broken loose. > > What I believe is that the upper spar cap broke at one side and the whole wing > was fluttering. That made the other side of the spar also loose its wing > support and we now had two wings fluttering. THAT you can observe from 1200 ft > below. > > I hope the NTSB will get the details out soon. So the talk "we don't do > nothing, the controls were fluttering" will stop. > > > Hartmut > > > To: [email protected] > From: [email protected] > Date: Tue, 29 Sep 2009 17:44:53 -0700 > Subject: RE: [ercoupe-tech] Re;FYI -Seibring crash Read & Ponder > > > "From the second witness's position, he could see both ailerons - the hinged > flaps on the control surfaces attached to the wing's trailing edge - > fluttering at a high frequency." > > Hard to believe. Eyewitness accounts are known to be unreliable. > > ³And they flutter that much that a witness from 1200ft below can see them > moving.² > > Even less reliable. 1200 feet away and he can see both fluttering? > > Ralph Finch > > ________________ Alon A2 A-188 G-HARY www.ercoupe.co.uk
