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  #1  
Old 03-21-2012, 09:55 PM
jenatepilot jenatepilot is offline
 
Join Date: Mar 2012
Location: Clarksville
Posts: 22
Default Clipped wing RV-8

I love what Harmon did for the RV4 giving it a shorter and stiffer wing and coincidentally a higher G tolerance. Is there ANYONE who has done the same favor for the RV8???
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  #2  
Old 03-21-2012, 10:14 PM
jenatepilot jenatepilot is offline
 
Join Date: Mar 2012
Location: Clarksville
Posts: 22
Default

Even someone that has removed the fiberglass tips. Any improvement in top end speed?
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  #3  
Old 03-21-2012, 10:23 PM
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WillyEyeBall WillyEyeBall is offline
 
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Location: Daleville, AL
Posts: 343
Default wing tips

Don't know if you're asking about cosmetics or performance, but 3 of us RV-4s that I know have gone to flat wind tips with fences to improve roll rate and retain stall speed for IAC competition without changing the rib spacing:
Same thing could apply to RV-8s.
Bill McLean
RV-4 Slider
Alabama
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  #4  
Old 03-22-2012, 03:21 AM
Bob Axsom Bob Axsom is offline
 
Join Date: Mar 2005
Posts: 5,685
Default I did it on the RV-6A (tip replacement)

Long story. Many tips; covered in other threads. It is faster. The roll rate seems faster but that is of no importance to me so no real tests performed.

Bob Axsom
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  #5  
Old 03-22-2012, 04:56 PM
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Roo747 Roo747 is offline
 
Join Date: Aug 2010
Location: Flesherton, ON
Posts: 33
Default bonehead composites

Not sure what you'll get with these but looks interesting.

http://www.boneheadcomposites.com/m8...ng%20Tips.html

made of carbon fibre

Cheers

Last edited by Roo747 : 03-22-2012 at 04:58 PM.
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  #6  
Old 03-22-2012, 05:20 PM
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rocketbob rocketbob is offline
 
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Location: 8I3
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Default

Quote:
Originally Posted by jenatepilot View Post
I love what Harmon did for the RV4 giving it a shorter and stiffer wing and coincidentally a higher G tolerance. Is there ANYONE who has done the same favor for the RV8???
I have a friend who did this on a Super 8, not yet flying. Cut the last outboard bay off and built shortened ailerons.
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  #7  
Old 03-22-2012, 05:53 PM
Bob Axsom Bob Axsom is offline
 
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Posts: 5,685
Default I have seriously considered this as well

Quote:
Originally Posted by rocketbob View Post
I have a friend who did this on a Super 8, not yet flying. Cut the last outboard bay off and built shortened ailerons.
In my case I have a fall back, with the tip tanks I can put back 1.5'. However at 180 HP with 21.5' span I get the feeling that going down two rib bays would be a mistake. If I get beat too bad at Texoma on march 31, 2012 I'll have to look at it again.

Bob Axsom
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  #8  
Old 03-22-2012, 09:24 PM
jenatepilot jenatepilot is offline
 
Join Date: Mar 2012
Location: Clarksville
Posts: 22
Default great

great info guys. If my measurements are right, then leaving the wing tips off and making a flush end will take a full 2 feet off the span leaving it at 22'. The harmon II is only 2" less than that so it sounds like a quick fix for faster roll rate and less drag.

ANYone have templates for the flush tip and fences?
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  #9  
Old 03-22-2012, 09:59 PM
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DRBuilder DRBuilder is offline
 
Join Date: Apr 2011
Location: Wake Forest, NC
Posts: 96
Default

Quote:
Originally Posted by rocketbob View Post
I have a friend who did this on a Super 8, not yet flying. Cut the last outboard bay off and built shortened ailerons.
JM Out of Indy?
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  #10  
Old 03-22-2012, 11:20 PM
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longranger longranger is offline
 
Join Date: Mar 2007
Location: 45G, Brighton, MI
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Quote:
Originally Posted by jenatepilot View Post
great info guys. If my measurements are right, then leaving the wing tips off and making a flush end will take a full 2 feet off the span leaving it at 22'. The harmon II is only 2" less than that so it sounds like a quick fix for faster roll rate and less drag...
But... The HRII still has a full compliment of ribs (closer spacing), thus a stiffer wing.
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