Changing wingtip design on Telemaster 40
10-01-2007, 02:42 PM
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Changing wingtip design on Telemaster 40
I am in the process of building a 40 size Telemaster from a kit. It will be gas powered.
I was getting ready to put the wing tips on and had a design inspiration. I really never liked how the undercambered sharp edged wing tips look on most trainers, the Telemaster included. So having an extra piece of triangle stock laying around I decided to experiment.
I basically built the tip upside down so the bottom of the tip matches the bottom of the wing and the top is faired to provide a nice curve down from the top of the wing.
I really like the way it looks but I'm afraid it may adversely affect the way the wing behaves. So before I do the same to the other half and maybe even to the horizontal stab, I was wondering if anyone has a strong opinion about what may happen to the airfoils behavior and performance.
I'll attach a picture as soon as I can.[/size]
I was getting ready to put the wing tips on and had a design inspiration. I really never liked how the undercambered sharp edged wing tips look on most trainers, the Telemaster included. So having an extra piece of triangle stock laying around I decided to experiment.
I basically built the tip upside down so the bottom of the tip matches the bottom of the wing and the top is faired to provide a nice curve down from the top of the wing.
I really like the way it looks but I'm afraid it may adversely affect the way the wing behaves. So before I do the same to the other half and maybe even to the horizontal stab, I was wondering if anyone has a strong opinion about what may happen to the airfoils behavior and performance.
I'll attach a picture as soon as I can.[/size]
10-01-2007, 07:29 PM
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RE: Changing wingtip design on Telemaster 40
Compound curves don't bother me. It's the overall change to the airfoil that concerns me. Any input?
10-01-2007, 07:44 PM
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RE: Changing wingtip design on Telemaster 40
ORIGINAL: nocrashing
Compound curves don't bother me. It's the overall change to the airfoil that concerns me. Any input?
Compound curves don't bother me. It's the overall change to the airfoil that concerns me. Any input?
I wouldn't worry about it.
10-01-2007, 08:32 PM
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RE: Changing wingtip design on Telemaster 40
ORIGINAL: nocrashing
I am in the process of building a 40 size Telemaster from a kit. It will be gas powered.
I was getting ready to put the wing tips on and had a design inspiration. I really never liked how the undercambered sharp edged wing tips look on most trainers, the Telemaster included. So having an extra piece of triangle stock laying around I decided to experiment.
I basically built the tip upside down so the bottom of the tip matches the bottom of the wing and the top is faired to provide a nice curve down from the top of the wing.
I really like the way it looks but I'm afraid it may adversely affect the way the wing behaves. So before I do the same to the other half and maybe even to the horizontal stab, I was wondering if anyone has a strong opinion about what may happen to the airfoils behavior and performance.
I'll attach a picture as soon as I can.[/size]
I am in the process of building a 40 size Telemaster from a kit. It will be gas powered.
I was getting ready to put the wing tips on and had a design inspiration. I really never liked how the undercambered sharp edged wing tips look on most trainers, the Telemaster included. So having an extra piece of triangle stock laying around I decided to experiment.
I basically built the tip upside down so the bottom of the tip matches the bottom of the wing and the top is faired to provide a nice curve down from the top of the wing.
I really like the way it looks but I'm afraid it may adversely affect the way the wing behaves. So before I do the same to the other half and maybe even to the horizontal stab, I was wondering if anyone has a strong opinion about what may happen to the airfoils behavior and performance.
I'll attach a picture as soon as I can.[/size]
Mike
10-02-2007, 07:18 AM
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RE: Changing wingtip design on Telemaster 40
I believe your modification will produce adverse roll (dutch roll) from rudder input, i.e., right rudder input will cause the left wing to lower instead of raise.
10-02-2007, 09:27 AM
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RE: Changing wingtip design on Telemaster 40
Go for it I did the same to my old Telemaster 40, may It RIP (student did it in). The mods didn't change a thing. The Telemaster is very forgiving to say the least.
As the 40 size flys well with a 40-46 size 2 stroke (had a 52 4 stroke on mine) what kind of gasser are you using, that might be something to consider as this plane does not require a lot of power.
As the 40 size flys well with a 40-46 size 2 stroke (had a 52 4 stroke on mine) what kind of gasser are you using, that might be something to consider as this plane does not require a lot of power.
