wing warp
03-29-2014, 06:32 PM
#1
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Join Date: Sep 2003
Location: Arcadia,
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wing warp
A friend bought a Great Planes PT40 from a person who built it from a stick kit.
I test flew the airplane and it turns to the right and requires almost full right aileron and rudder trim.
Upon closer examination we found that the wing has about a 1/4" warp in it.
How can this be corrected without rebuilding the wing?
Arlin Leder 507-363-1996
I test flew the airplane and it turns to the right and requires almost full right aileron and rudder trim.
Upon closer examination we found that the wing has about a 1/4" warp in it.
How can this be corrected without rebuilding the wing?
Arlin Leder 507-363-1996
03-30-2014, 04:07 AM
#3
My Feedback: (2)
X2, process described above works like a dream. Easy fix.
I bought a plane from a buddy on the cheap because of this problem. He literally refused to believe Lifer's fix was possible. The next day, he bought it back (for just a little more than what he sold it for), as it was now a fine flying plane!
I bought a plane from a buddy on the cheap because of this problem. He literally refused to believe Lifer's fix was possible. The next day, he bought it back (for just a little more than what he sold it for), as it was now a fine flying plane!
03-30-2014, 05:12 AM
#4
ahicks,
Thanks for the support. Can always count on you for reasonable response. After seeing something like 40 people had looked at this but not one person bothered to help, I'm somewhat hesitant to reply because all too often some clown will attack you for what you say. To the OP, if you want to really enhance the planes slow speed flight, EQUALLY counterwarp BOTH sides of the wing so each trailing edge, at the tip, is about a 1/4 inch raised. It will be a progressive increase; a little at the inside, to a full 1/4 inch at each tip. This is called Washout, and it delays the stall of the tips resulting in enhanced slow-speed flight characteristics. Chances are, the wing has a flat-bottomed airfoil so this is easy to check by laying the respective wing panels on a flat table. Best of luck with your new hobby!
ahicks,
Have a great flying day down in Florida. Still a little cool in Missouri, but it's getting warmer every day!
Thanks for the support. Can always count on you for reasonable response. After seeing something like 40 people had looked at this but not one person bothered to help, I'm somewhat hesitant to reply because all too often some clown will attack you for what you say. To the OP, if you want to really enhance the planes slow speed flight, EQUALLY counterwarp BOTH sides of the wing so each trailing edge, at the tip, is about a 1/4 inch raised. It will be a progressive increase; a little at the inside, to a full 1/4 inch at each tip. This is called Washout, and it delays the stall of the tips resulting in enhanced slow-speed flight characteristics. Chances are, the wing has a flat-bottomed airfoil so this is easy to check by laying the respective wing panels on a flat table. Best of luck with your new hobby!
ahicks,
Have a great flying day down in Florida. Still a little cool in Missouri, but it's getting warmer every day!
03-30-2014, 01:38 PM
#5
My Feedback: (2)
Easier yet, (again assuming a flat bottom wing) tape or somehow fasten a straight piece of something (balsa, wire, whatever) about twice as long as the wing is wide, to the root of the wing, and again at each tip. Now just view it from either end to see exactly what's going on, and, depending on where your "straight piece of something's" is placed, where it's going on....
You're welcome Lifer! Pretty common fix to those of us covering our own stick builts on occasion. Those brought up on ARF's maybe not so much! -Al
You're welcome Lifer! Pretty common fix to those of us covering our own stick builts on occasion. Those brought up on ARF's maybe not so much! -Al
