Horizontal tail down load

Mayfield

Gold Supporter
Joined
Oct 30, 2003
Messages
888
Location
Avondale, Arizona
Aircraft
Hatz Classic Bi-plane
Total Flight Time
>14K hours
I posted this on Norm's forum and thought it might be helpful here as well. The members of the two forums are still seperate enough that I think some things should be posted both places.

I've been meaning to throw this out for everyone for weeks, but it keeps slipping my mind.

For those of you with horizontal stabilizers that are difficult to rig for appropriate negative incidence, you migh consider installing "Gurney" flaps at the trailing edge.

They are easy to fabricate. You can probably find out every thing you wanted to know about Gurney flaps using your search engine.

I'm also certain that Chuck, Doug, or Rahu can expound on the positives and negatives of there use.

We discovered, through instumented testing, that you can get a fair amount of lift without a significant drag penalty if they are slightly shorter than the thickness of the boundry layer.

R/S

Jim
 
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