REFLECTOR: Pitch Trim Spring

[Ron Brown]

Be careful about going too slow on final.

If you get a sudden change in head wind, like you have a 10 kt head wind on 
final, and it suddenly goes to 5 knots and you're right on the pitch buck, 
you'll find yourself making a hard, nose first landing.

Been there, done that!!!  Do like Jack says, find longer runways, and come 
over the numbers at 80 kts, get down to the runway, then let the speed bleed 
as you touch down.

I have figured out it is better to go off the far end of the runway going 
slow, than to hit hard while going 65 knots at the near end of the runway!

Y'all have fun at Sun-n-Fun!!!!!

Ronnie

----- Original Message ----- 
From: "John Dibble" <aminetech at bluefrog.com>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Saturday, April 01, 2006 1:22 PM
Subject: Re: REFLECTOR: Pitch Trim Spring


> Jack,
> Interesting comment about the oscillation.  With 2 up front I get a mild 
> oscillation on approach if I am at 70 kn.  Just assumed it was a mild 
> stall.  It goes away in ground effect.  I haven't had the chance to check 
> this since I reversed the strainer.  Guess I'll think some more before 
> altering the spring.
> John
>
> J.F.Sheehan at larc.nasa.gov wrote:
>
>> I had cut down the spring to about a 3/4 inch width and added some 
>> carbon. that did not work too well the carbon seperated from the glass 
>> and the spring was way too little. During approach for landing it was 
>> easy to get into a nose oscillation with your hand on the stick you 
>> became part of the oscillation. I replaced it with a standard factory 
>> spring and am very happy. The aircraft will trim very nicely and stay 
>> where you want it. I had the strainer on and off and see very little 
>> effect. I fly at cruise with about 1/4 inch up elevator. No vg's or 
>> vortillons. The airplane does very well but for the most part I fly to 
>> good runways where I am comfortable with 80-85 kt touchdown speeds.
>> Jack
>> N55XL
>
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