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Re: Stall strips

Subject: Re: Stall strips
From: Klaus Dietrich <Klaus.Dietrich@oracle.com>
Date: Thu, 30 Aug 2001 11:02:43
Yes, I do know one who did....and I can also report that he did a wheel-up
landing....with full flaps down...electricaly deployed....just forgot to lower
also the gear....

Klaus

Shaun Simpkins wrote:

> Now here's a thought.
>
> Has anyone out there tried decoupling the flaps and gear on a monowheel and
> using
> the tri-gear flap motor to deploy the flaps?  One can see why full flaps are
> desirable
> on landing, but mebbe only 1/3 flaps are really required on takeoff.
> I seem to recall that the original 912/fixed pitch classic had barely enough
> oomph to
> take off at sea level.  The 912S addresses this, and the 914 at high/hot
> conditions,
> but Terry's T/O problems sound frightening...
>
> Shaun
>
> ----- Original Message -----
> From: "Terry Seaver" <terrys@cisco.com>
> Subject: Stall strips
>
> > N135TD is a mono-wheel XS with 912S and a Whirlwind
> > constand speed prop.
> > Stall testing of N135TD at gross weight showed a
> > very benign gear/flaps up stall at about 50 knots. On the
> > other hand, the gear/flaps down stall is rather abrupt at
> > about 44 knots, with one wing falling off rather quickly
> > and the nose dropping to near vertical before recovery
> > can be made.  We thought that it would be best to fit
> > stall strips, as recommended in the Europa pilot's manual,
> > as a stall like this on final approach could ruin your day.
> >
> > Last Sunday we flew to Bishop, CA, which is at 4120 feet.
> > On take off, with two aboard and full fuel, I was unable to
> > get the airspeed above 52 knots with the gear/flaps down,
> > and finally had to slowly raise the gear/flaps to gain speed
> > (density altitude was about 7500 ft, weight was about
> > 50 pounds under gross). Even after the gear/flaps were
> > up, climb was a rather anemic 250 fpm.
> >
> > Given that we were already close to stall under these conditions,
> > both with the gear/flaps up and down, is it advisable to raise the
> > stall speeds even higher with stall strips ?
> > What kind of increases in stall speeds have other builders seen
> > whan they added the stall strips ?
> >
> > Please note, Bishop is not a particularly high or hot airport in this
> > region.  I can't help but wonder what kind of performance to expect
> > at higher places (Lake Tahoe, for example) on a really hot day,
> > where density altitudes can exceed 10,000 feet.
> >
> > Terry Seaver
> >
> >
>



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