You can partially correct this warp by cracking the TE joint to the tailboom (I'm guessing that the picture shows the stab mounted to the tailboom) and slightly twisting the stabilizer to correct the warp as you reglue the joint. Hold the stabilizer up to "eyeball" the twist correction as you glue it. We have found the easiest way to twist is to squeeze the joint between two fingers and apply slight pressure one way or the other to change twist. The trick is to do this and still allow room for your glue tool to apply a drop without gluing fingers. I often do glue my fingers. If you do, twist finger back and forth to break your finger free (don't lift straight up or you'll just pull the joint apart or pull some covering off. Glue it with just a small dot of CA. Let this dry for about 1 min and then (as the joint won't be very strong yet) you can continue squeezing and twisting the joint to correct more and then add final gluing.jgrischow1 wrote: ↑March 11th, 2023, 6:54 amhttps://drive.google.com/file/d/15lgztN ... share_linkbjt4888 wrote: ↑March 10th, 2023, 2:36 pmJg,jgrischow1 wrote: ↑March 10th, 2023, 12:19 pm Any suggestions for fixing a rear stab (carbon fiber) that's warped? My kids tried to put weights on it and flatten it out overnight but that didn't do much.
You can’t straighten warped carbon rods. However, you can tweak the flying surface (I assume it’s the stabilizer with the problem) to minimize the detrimental effect. For instance, if the warp is trailing edge down on the left side, this is not much of a problem if it’s only a degree or so of twist. A small amount of washin on the left side of the stab is occasionally used as a trim method. You may mean 0.5 degrees of additional decalage to compensate.
A picture of the warp would allow us to diagnose and give a better recommendation.
Brian T
https://drive.google.com/file/d/1rzL4hv ... share_link
Unfortunately it looks to be the opposite of what you hoped!
If you can get the stabilizer mostly flat, it looks like you will end up with slight TE droop on each tip of the stab. This is not a terrible situation, and the airplane can be flown with slight additional wing incidence (maybe 1-2 mm) or slight additional negative stabilizer incidence (maybe 1-1.5 degrees).
Then fly it and see how it goes.
Brian T