REFLECTOR: STICK & RUDDER

michalk michalk at awpi.com
Mon Mar 26 11:53:34 CDT 2007


There was an article in VV where aileron snatch would occur in a roll. 
The fix was to make sure the counterweight was rounded according to 
plans.  A sharp edge will cause a problem at one particular point in the 
roll.

Scott Derrick wrote:
> Tom,
> 
> I would first verify your "ball" is set correctly.  You know the drill, 
> level the plane, check the ball.  If you have the standard fuel set up 
> with a single cutoff switch, you fuel burn will act as a yaw sensing 
> device. If the plane is not trimmed correctly(everything else according 
> to hoyle, ie, fule caps tight, no leaks in vent system, etc.) you will 
> have uneven fuel consumption between the left and right fuel tanks.. 
> 
> If you do have even fuel flow, verified with at least an hours level and 
> straight cruise test, I'd adjust the ball in flight to register in 
> between the lubber lines.  If the fuel flow is not even shim the right 
> rudder out a bit more.
> 
> Regarding the right rudder flutter.  That should be dealt with no matter 
> what the yaw situation is.  Have you called the factory and asked about 
> that?   Do you get the flutter in a hard roll with out using any rudder? 
> Or half rudder? 
> 
> You asked a while ago about how fast to test for flutter. I'd recommend  
> you test for 10 to 20% higher than your fast cruise speed.  Test at 
> altitude. Test carefully, 5 knot increments using the knock method on 
> the controls.
> 
> Scott
> 
> 
> Tom Martino wrote:
>>
>> At first I thought it was just the weather, or maybe an uneven fuel 
>> load … but I can no longer deny it.  My plane still yaws a bit to the 
>> left (which means I have to touch the right rudder to make it fly 
>> perfectly straight).  So I have the following questions and would like 
>> those with more experience to answer:
>>
>>  
>>
>>    1. The ball is only a tiny bit out of center and I can get speeds
>>       of 200 KTAS or more … so should I leave the damn thing alone?
>>    2. The plane is almost perfect ... so should I make it fly perfectly?
>>
>>  
>>
>> I should also make these observations:
>>
>>  
>>
>> --I already shimmed the wings with washers several hours ago – which 
>> helped a lot … but there is still a slight yaw,
>>
>> --I also shimmed the right rudder out a bit (right after I did the 
>> wing) … it seemed near perfect … but still a tiny yaw.
>>
>> --When I am at higher speeds (170+ TKAS) and make a hard right turn 
>> with full right rudder … the right rudder will flutter a bit.
>>
>> --When turning left at the same speed … no flutter at all.  Is this 
>> because I shimmed the right rudder out a bit to begin with?
>>
>>  
>>
>> ANY AND ALL COMMENTS APPRECIATED.
>>
>>  
>>
>> I have taken a lot of time to make this an exceptional bird … am I 
>> going too far? 
>>
>>  
>>
>> Tom Martino
>>
>> ------------------------------------------------------------------------
>>
>> _______________________________________________
>> To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector
>>
>> Visit the gallery!  www.tvbf.org/gallery
>> user:pw = tvbf:jamaicangoose
>> Check new archives: www.tvbf.org/pipermail
>> Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
> 
> -- 
> 
> -
>     As nightfall does not come at once, neither does oppression. In both instances, there is a twilight when everything remains seemingly unchanged. And it is in such twilight that we all must be most aware of change in the air however slight lest we become unwitting victims of the darkness.
> 
>     William O. Douglas, Justice of the U.S. Supreme Court 
> 
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector
> 
> Visit the gallery!  www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail
> Check old archives: http://www.tvbf.org/archives/velocity/maillist.html



More information about the Reflector mailing list