REFLECTOR: Elevator gap

[Kevin Baker]

Hi All,
Does anyone know the story as to why they removed the cuffs (ie- and 
why they were on)?
I can't remember.

Thanks,
Kevin Baker

At 01:03 PM 9/24/2007, Al Gietzen wrote:
>Subject: Re: REFLECTOR: Reflector Digest, Vol 40, Issue 54
>
>I built a '97 SE RG with elevator cuffs and then cut them off at the
>recommendation of the factory. It did improve the pitch buck oscillation
>without them. I did not change the gap, nor did the factory recommend that I
>do so. It worked fine. I wouldn't worry about it.
>
>Mark Riley
>
>I had a nice chat with Scott Swing on the subject this morning. 
>Basically he said (without the cuff) to set the .050 gap with the 
>elevator in neutral position, have the elevator positioned so the 
>centerline of the front curvature of the elevator is directly under 
>the canard trailing edge; and then take what you get for gap when 
>the elevator trailing edge is full down. The gap will be much larger 
>than the 0.2 given in the manual; possibly about 0.5" or more.  He 
>will see about having the manual changed appropriately.
>
>He also said it is important that the elevator surface be slightly 
>lower than the canard surface; IOW, when you measure the .050 gap 
>with the stir stick, the stick should be close to horizontal so the 
>elevator surface is close to .050 below the canard surface. You do 
>not want the elevator surface above the canard surface.
>
>So basically I just need to remove the cuff.  He noted that he had 
>seen WingCo elevators where the glass plies were put over the cuff, 
>so if you grind off the cuff you need to add a ply of glass around 
>the tube onto the skins.  I think my cuffs are just micro filler so 
>I can just sand them off.
>
>Al
>
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