HaveBlue

I have started sheeting an open structure craft with 1.5mm thick X 915mm wide balsa sheets. all has been going fine, now I dont know if this is because of a few days of damp weather but one of the sheets has sunken on one end and on the other has bulged up slightly.. I have an idea or two about fixing it but would like to hear if there is a proven method for fixing something like this

any suggestions appreciated

MinnFlyer

My Feedback: (4)

Can you give us a little more detail?

Is it a wing or a Fuse?

Can you get at the back side?

Pics?

HaveBlue

Hi, sorry about the lack of detail, as for it being in the fuse or wing..well the answer is both. the sheeting is on a Diamond Dust here is a photo of the problem. Hopefully the photo will show up the warping , it's in the sheet just behind the servo compartment
and yes I can get behind it , as I havent sheeted the bottom yet

BWooster

You could try try cross-grain stiffening pieces. But it looks like a humidity problem to me.

HaveBlue

yes it is the humidity that has caused this as it wasn't like this before, only after a couple of days of rain.. , if no other soultions are forthcoming I'll try that after my ideas fail, which is to get a heat gun and try to dry it or maybe even just re sheet that section(which I'd rather leave as a last resort)

HaveBlue

a few minutes in front of a fan heater and it's as good as new

macdona

My Feedback: (3)

I had some warped so bad that the only thing I could do was to cut it with a knife and trim out the bulge and use filler to smooth things up. I live in a dry climate, so usally this is not a problem.