COVERING OPEN BAYS WITH POLYSPAN:I do all 3 coats the same day, in fact I have done them with only an hour drying time between coats. You can put on the 3 coats by 10am, sand right after lunch, and start applying the covering the same afternoon.
Put at least 3 coats of Nitrate dope on the airframe. I use a 50/50 ratio of dope and nitrate thinner for this. I usually wait a day between each coat. After the third coat has dried, I sand with 220 grit sandpaper to smooth the balsa some.
Reviving this old thread to ask, after you stick the polyspan on with the thinner how long do you wait to heat shrink it?
Thanks,
MM
Can Polyspan be dyed?
Yes it can. http://www.modelflight.com/larrydavidson.html
I intend to use as little dope as I can because, I'll be covering the polyspan with Coverite microlite. What I want to know is after you stick it down with the thinner do you need to put additional coats of nitrate on the frame to secure adhesion?
Thanks,
MM
Is there a certain way to apply the p/span to keep from getting wrinkles/puckers at the cap strips where they join the l/e and t/e sheeting?
Seems that I always get these after the dope s dry...
Is there a certain way to apply the p/span to keep from getting wrinkles/puckers at the cap strips where they join the l/e and t/e sheeting?
Seems that I always get these after the dope s dry...
Thanks Mike, I never thought of that.