REFLECTOR: FINALLY SOME TRUE DATA -- NOW WHAT [heur]

[Scott Derrick]

Isn't it in your build manual?  You did get that with your plane?

Scott

Tom Martino wrote:

>My fear is how much rudder shim I will need ... it takes a lot of rudder
>to get it to fly straight.  I the winglets are screwed up (which I did
>not build ... it will be a major reconstruction.
>
>Does the factory have measurements for the angle of the winglets?
>
>-----Original Message-----
>From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
>Behalf Of Scott Derrick
>Sent: Monday, May 16, 2005 7:56 PM
>To: Velocity Aircraft Owners and Builders list
>Subject: Re: REFLECTOR: FINALLY SOME TRUE DATA -- NOW WHAT [heur]
>
>Tom,
>
>You have figured it out. Your winglet/rudders are out of rig.
>
>Of course the ball is centered on the ground when taxing straight, thats
>
>what it is telling you, your taxing straight down the runway. Its not 
>until your wheels leave the ground that your flying surfaces(wings, 
>winglets, rudders, etc)  take over that function. 
>
>You need to shim the rudder your stepping on outboard to center the 
>ball.  You can shim the other rudder in but not past the trailing edge 
>of the winglet. NEVER NEVER shim a rudder inboard of the winglet 
>trailing edge line!  Dragons live there.
>
>Once you have the ball centered with rudder shims you can check your 
>wing incidence by how straight(no wing drop) she flys hands off.  If you
>
>have to rotate a wing by inserting washers in between the spars on the 
>wing attach bolts you may need to re shim a rudder to compensate.
>
>Scott
>
>Tom Martino wrote:
>
>  
>
>>Ok ... if I let my plane fly the way it wants, with wings level ... the
>>"ball" is way off to the left (on the ground it is neutral) and the
>>    
>>
>left
>  
>
>>wing wants to bank ... making a slight turn to the right.
>>
>>
>>
>>To get the nose perfectly straight it requires a LOT of left rudder.
>>Then the plane flees without any turning or banking tendencies.
>>
>>
>>
>>I don't think any vertical surfaces (winglets or rudders) are out of
>>    
>>
>rig
>  
>
>>because at high speed ground roll (landing and taking off) the plane
>>tracks perfectly.  It is only when lift is developed that the "ball out
>>of center" phenomenon starts.
>>
>>
>>
>>The trim tab did not help much and was removed.
>>
>>
>>
>>I believe I need to decrease the angle of attack on my left wing to
>>correct the problem.
>>
>>
>>
>>When I checked incidence ... they were right on.
>>
>>
>>
>>By the way ... does "P" factor cause some of this problem?  If the left
>>side of my prop (as viewed from behind) develop more thrust ...
>>    
>>
>wouldn't
>  
>
>>that cause the plane to fly off to the right?
>>
>>
>>
>>I examined my engine mount and it is not canted to cancel out the "P"
>>factor.  
>>
>>
>>
>>Any thoughts?
>>
>> 
>>
>>-----------------------------------------------------------------------
>>    
>>
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