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Jan 12, 2013, 08:47 PM
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85045
Joined Oct 2005
1,988 Posts
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HT08 Hinged?
Kevin Sharbonda cut me a batch of very nice horizontal tail cores using an HT08 airfoil. Problem is, I should have ordered HT22, since they're intended for a hinged horizontal!
Has anyone hinged an HT08 tail and if so, how did you like the result? Cheers, Charles 
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Jan 12, 2013, 09:08 PM
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Raleigh, NC, USA
Joined Sep 2004
1,822 Posts
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Considering that we used flat plate balsa tails a few years ago, and it was pretty normal and worked wonderfully, why are you concerned about having a hinged HT08 tail?
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Jan 13, 2013, 12:55 AM
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Joined Apr 2009
4,953 Posts
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They will just give up a little efficiency in tight turns. Otherwise they should do fine.
Gerald |
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Jan 13, 2013, 09:07 AM
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85045
Joined Oct 2005
1,988 Posts
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Quote:
Cheers, Charles
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Jan 13, 2013, 02:52 PM
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Joined Apr 2009
4,953 Posts
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You can improve the situation a little once you have it trimmed out. Shim the fixed portion to be very slightly nose down, so that once retrimmed, it looks like it is flying with perhaps a degree of down elevator. That lessens the up elevator required compared to the native airfoil and will drop the drag slightly in tighter turns.
Gerald |
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Jan 14, 2013, 02:56 PM
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Emmen, Netherlands
Joined Aug 2008
290 Posts
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I've used hinged HT-08 cores aswell. Didn't run into trouble. works great.
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Jan 14, 2013, 04:11 PM
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85045
Joined Oct 2005
1,988 Posts
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Quote:
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Jan 14, 2013, 06:49 PM
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United States, MD, Lutherville-Timonium
Joined May 2003
1,357 Posts
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Tail Foill tables from CharleRiver ...
http://www.charlesriverrc.org/articl...t-airfoils.htm As Oleg stated, I've hinged many full flying stab foils and they work fine ! |
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Last edited by KevinSharbonda; Jan 15, 2013 at 06:52 AM.
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Jan 18, 2013, 09:36 AM
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Joined Jan 2004
281 Posts
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I really need a set of tail feathers - bagged hinged whatever - i have an xp4 kit that needs building - yes u read that correctly.... i guess the balsa stuff is worth upgrading ...is there someone on rcgroups that sells them? - i see them from time to time in the classifieds but man they last like 5 minutes ! spent a lot of time reading the single cell thread and topdrive servos is a new thing for me and i like that idea a lot (have seen Oleg's validol installation man that is sweet) ...
a lot has changed in my 5 yr absence - should be fun...sorry for the minor drift there |
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