trying2fly
If I were to place foam tabs for trim adjustment when all else fails what would be the effect on flight of placing the tabs at point A or at Point B????Would the plane veer to the left and if so what would be best place for tab? thanxF22 tabs 005.JPG 
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whatmovesyou
What direction are you going to deflect them?
I like to design and fly unique planes.
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trying2fly
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What direction are you going to deflect them?

I wanted to know if the direction of the plane would be diverted to the left as you look at the plane from the rear. I was considering the height of the tab to be approx. 8 mm or so ......I just didn't know where to put the tab and was one place better than the other?( on elevon or wing) thanx Chas
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homey666
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If I were to place foam tabs for trim adjustment when all else fails what would be the effect on flight of placing the tabs at point A or at Point B????Would the plane veer to the left and if so what would be best place for tab? thanx[ATTACH=full]53669[/ATTACH]

Just my simple opinion, but......
Tab A will amplify right turn.
Tab B will do the same for right turn. I think that as elevator, you may have an unwanted push to the right and it may be tricky.
I could be completely wrong, but I'm just visualising while sitting at my desk!

Peter
YouTube Channel

flower666able
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Wildthing
My question would be why? It's one thing adding things like wingtips for stability but to make it fly straight or whatever the case, all you are doing is adding drag in my mind and taking away from the performance. With that aside it's a simple test for you, just tape or pin them inplace and move them around and see what effects they have. You could have 8 pieces cut out so you could try all the combinations , left, right, front , rear, top , bottom or all . Have a bunch of batteries charged up, a roll of tape and go at it.

Cheers
Jeff
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trying2fly
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My question would be why? It's one thing adding things like wingtips for stability but to make it fly straight or whatever the case, all you are doing is adding drag in my mind and taking away from the performance. With that aside it's a simple test for you, just tape or pin them inplace and move them around and see what effects they have. You could have 8 pieces cut out so you could try all the combinations , left, right, front , rear, top , bottom or all . Have a bunch of batteries charged up, a roll of tape and go at it.

Cheers
Jeff

Jeff...the WHY??? of it is directly proportional to my warped building materials, lack of timely access to supplies, and mostly builder talent and expertise. Along with a generous LACK of flying talent for good measure, it is usually the need to throw a tab here and there in an effort to get back to flying as fast as I can. This is a wonderful hobby and occasionally it behooves me to modify or not-fly. Thank you for your patience and suggestions...they are the best!! chas PS ...this whole thing arose out of slopping on hot glue all over KF2 and it seriously warped and I was compensating with tabs so that I could still fly it after all the time I put in it.
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trying2fly
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Just my simple opinion, but......
Tab A will amplify right turn.
Tab B will do the same for right turn. I think that as elevator, you may have an unwanted push to the right and it may be tricky.
I could be completely wrong, but I'm just visualising while sitting at my desk!

Peter
Thank you Peter.... chas
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Wildthing
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Jeff...the WHY??? of it is directly proportional to my warped building materials, lack of timely access to supplies, and mostly builder talent and expertise. Along with a generous LACK of flying talent for good measure, it is usually the need to throw a tab here and there in an effort to get back to flying as fast as I can. This is a wonderful hobby and occasionally it behooves me to modify or not-fly. Thank you for your patience and suggestions...they are the best!! chas PS ...this whole thing arose out of slopping on hot glue all over KF2 and it seriously warped and I was compensating with tabs so that I could still fly it after all the time I put in it.

With all that relentless wind you have to fly in you are probably a master pilot and just don't know it.

Ever tried boiling water to soften up the foam to straighten it.? Dip the wing into a big pot of water (if wife let's you in the kitchen) . Enough heat it could even soften the hot glue a bit and make it flexible.
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trying2fly
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With all that relentless wind you have to fly in you are probably a master pilot and just don't know it.

Ever tried boiling water to soften up the foam to straighten it.? Dip the wing into a big pot of water (if wife let's you in the kitchen) . Enough heat it could even soften the hot glue a bit and make it flexible.

I did just what you suggested Jeff. I boiled water in kettle and poured it over the wing as I suspended plane away from me. It worked!!! I had to do it twice but the warp is gone. Had to mash it down and hold it for a min or two(until my hands got tired) to let it cool. Note: Not allowed in the kitchen....hahaha Thanx a lot. Chas

Ps will let you know how it flies!!!
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Wildthing
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I did just what you suggested Jeff. I boiled water in kettle and poured it over the wing as I suspended plane away from me. It worked!!! I had to do it twice but the warp is gone. Had to mash it down and hold it for a min or two(until my hands got tired) to let it cool. Note: Not allowed in the kitchen....hahaha Thanx a lot. Chas

Ps will let you know how it flies!!!

Awesome.
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trying2fly
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Awesome.

Winds dropped down to 40-45 mph just before dark....need all the tabs I can get!!!haha
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Wildthing
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Winds dropped down to 40-45 mph just before dark....need all the tabs I can get!!!haha

Put a string on it and call it a kite.
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whatmovesyou
To answer your question, any tab will induce a roll, yaw and possibly pitch depending on it's relationship to the CG.

I still use the "blue foam" which has ripples and is bent every which way. I have seen models with elevators not parallel to the wing, rudders skewed, etc. etc., but guess what they all fly. May not be the stablest, so go ahead any way and see what happens.
I like to design and fly unique planes.
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trying2fly
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To answer your question, any tab will induce a roll, yaw and possibly pitch depending on it's relationship to the CG.

I still use the "blue foam" which has ripples and is bent every which way. I have seen models with elevators not parallel to the wing, rudders skewed, etc. etc., but guess what they all fly. May not be the stablest, so go ahead any way and see what happens.

After extensive experimenting I have come to the conclusion that the best solution is to get rid of the warp with hot water. I have found out the next best thing is to fly what you have with extreme trimming just like you have pointed out. It might look weird but fly like a dream. Thank you for your input.....you have obviously been where I am now!! Chas
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