Re: Is this stalling? Or something else?

From: <vhacker_at_pol.net>
Date: Sat, 24 Feb 2007 17:54:47 -0500 (EST)

I have also noticed this
Thought of it as a shfing of gears Then considered that is knots coming
loose Hacck
> I have had experience with a motorstick bending in the vertical plane.
> You trim the plane to fly well at launch, but it stalls, stalls, stalls
> as the torque, and therefore the bend, decreases over the length of the
> flight.
>
> However, something else I have sometimes observed is similar to, but
> subtly different that the behavior described above. The climb and
> cruise are normal, but as the plane is descending it kind of hesitates
> - almost as if it has just turned into a headwind. As a result, it
> drops down a foot or two, nearly vertically, then resumes flying
> normally. Sometimes this happens only once during the flight, somes
> two or three times.
>
> Looking back to our SO biplanes last year, they seemed more prone to
> this behavior than our monoplanes, but perhaps this is just
> coincidence.
>
> Any ideas as to what could cause this? It is under discussion on the
> Science Olympiad Student Center message board. One post mentioned
> stab tilt, or perhaps excessive stab tilt as the reason, but I don't
> see how it could be connected to this phenomenon.
>
> Dave Drummer
Received on Sat Feb 24 2007 - 15:01:47 CET