REFLECTOR: Velocity video
s_korney at hotmail.com
Thu Jan 31 11:36:16 CST 2008
A soft trim spring and the Sparrow Strainer allow for a better feel of the elevator on landing.....
> Date: Thu, 31 Jan 2008 10:20:54 -0600
> From: aminetech at bluefrog.com
> To: reflector at tvbf.org
> Subject: Re: REFLECTOR: Velocity video
> Dave Philipsen wrote:
> > Wow, my canard stalls at around 65 knots when I'm up in the air. Maybe
> > that number comes down a bit when in ground effect. Is that what you're
> > implying?
> Yes, plus the elevator "flap" effect.
> > Sounds like you are saying that you could fly final with the
> > canard bobbing and by the time you get down close to the ground it would
> > stop bobbing because of ground effect.
> Yes. However my power off stall is a mush. I would be less comfortable rounding out
> if the nose were bobbing significantly. With 2 up front I get a very gentle, barely
> perceptable oscillation which does go away in ground effect.
> > Do you have the throttle cut to idle before you touch down?
> > I thought the danger of deep stall was pretty much eliminated some years
> > ago with some changes made to the shape of the main wings. Is it really
> > still possible to deep stall in slow flight? If so, is it recoverable?
> I did a stall test according to the procedure posted by Scott B several years ago
> which calls for setting up at 80 kn and pulling back on the stick to get the stall. I
> got a mush and concluded that was satisfactory, but probably at my aft cg limit.
> I want to emphasize that I believe elevator position is very important. I believe
> that for the stall test, had I not pulled back on the stick and instead used my trim
> button, I would have achieved a lower speed where the main wing would have stalled and
> the canard kept flying (deep stall). This is just theory as I'm not willing to try
> it. This is my reason for recommending never to trim for level flight at a speed less
> than 80 kn.
> > Dave Philipsen
> > Velocity STD-FG
> > N83DP
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