Wing tip modification for trainer?  
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Wing tip modification for trainer? - 7/25/2003 12:27:30 AM   
Whirley Bird



Posts: 2181
Joined: 1/4/2003
From: Bordentown, NJ, USA
Status: offline 		Hi Gang,
Before I cover this wing I built up I was thinking of removing the sharp cut on the tips and feather down both the top and bottom of the wing tips then sort of round them off.
I'm also going to reduce the dihedral to that lower then that of an Avistar.
Just enough to notice.
Just looking at the stock version of the wing tips I see a lot of drag.
However i'm open to suggestions.
Thanks

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Vegas/
The only Easy Day Was Yesterday.
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Wing tip modification for trainer? - 7/25/2003 12:31:43 AM   
BotleRocketWar



Posts: 810
Joined: 1/5/2003
From:
Status: offline 		The "wedge" type wing tips are there for a reason. They add to the dihedral effect and give you a little more lift for the same airspeed.

Wing tips design is much more important than most people think. Being as this is a small trainer, it's really not THAT important though.

If you want to glue on another block or modify the one on there (which is built up on most trainers) go ahead and do it. I really like rounded off wing tips, but covering them is the biggest pain in the world!

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Brian Richman
BotleRocketWar@Aol.Com

(in reply to Whirley Bird)
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Wing tip modification for trainer? - 7/25/2003 2:11:50 AM   
Montague



Posts: 4653
Joined: 4/19/2002
From: Laurel, MD,
Status: offline 		On a trainer, I don't think you're going to notice much, if any, difference in the air from the wing tip change. I agree that some wingtips can make a signifigante difference for some planes, but in your case, whatever you want to do will likely be just fine.


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Kirk Montague Adams
RCCA 560

(in reply to Whirley Bird)
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Wing tip modification for trainer? - 7/25/2003 3:35:47 AM   
Whirley Bird



Posts: 2181
Joined: 1/4/2003
From: Bordentown, NJ, USA
Status: offline 		[QUOTE]Originally posted by BotleRocketWar

If you want to glue on another block or modify the one on there (which is built up on most trainers) go ahead and do it. I really like rounded off wing tips, but covering them is the biggest pain in the world! [/QUOTE]
Hi botlerocketWar.
I think I will do that.
I was reading another thread on dihedral and he received a lot of positive replys.
I remember last year when I posted I was going to change the dihedral, the post was removed and I was told that I was encouraging others to make a trainer unsafe to fly :
I think making changes like this only adds to the hobby.
Thanks for the response

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Vegas/
The only Easy Day Was Yesterday.

(in reply to Whirley Bird)
       Post #: 4

Wing tip modification for trainer? - 7/25/2003 4:27:11 AM   
Whirley Bird



Posts: 2181
Joined: 1/4/2003
From: Bordentown, NJ, USA
Status: offline 		[QUOTE]Originally posted by Montague
On a trainer, I don't think you're going to notice much, if any, difference in the air from the wing tip change. I agree that some wingtips can make a signifigante difference for some planes, but in your case, whatever you want to do will likely be just fine. [/QUOTE]
I have to agree with you for the most part.
I really like to build up a CUB from scratch but I just always seem to have to many things going at one time so doing some mods like this gives me a little satisifaction

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Vegas/
The only Easy Day Was Yesterday.

(in reply to Whirley Bird)
       Post #: 5

Wing tip modification for trainer? - 7/25/2003 10:16:16 AM   
BotleRocketWar



Posts: 810
Joined: 1/5/2003
From:
Status: offline 		Your post on removing dihedral on a trainer was removed? LOL

Gotta love that...

You can use anhedral on a trainer with no negative effects... Just sort of defeats the purpose in having a trainer if you're going to make the changes.

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Brian Richman
BotleRocketWar@Aol.Com

(in reply to Whirley Bird)
       Post #: 6

Wing tip modification for trainer? - 7/25/2003 7:32:48 PM   
banktoturn



Posts: 713
Joined: 8/22/2002
From: Bloomington, MN,
Status: offline 		Whirley Bird,

I guess I'll be the voice of dissent here. I think that wing tip design is much LESS important than most people think. Winglets can reduce induced drag a little bit for some planes, if properly designed. Beyond that, I don't think anything you do with the wing tip design will give you a noticeable benefit. If you want to modify the tips for aesthetic reasons, or for the heck of it, go for it. Generally, I don't think you will see an aerodynamic benefit.

banktoturn

(in reply to Whirley Bird)
       Post #: 7

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