I'm putting together plans for my next scatch built. The BT will be 4 LOC tubing which I plan to glass.
I know the weights per sqr inch of the plywood I'll use for fins and CRs, the weight per inch of the tubing, the nose cone, ect.
What I don't know and am having a difficult time estimating is the additional weight when glassing the tubes.
The 4" Loc tubes weight 0.4 oz per inch. If I put two layers of glass on it, what type of increase will I get. I don't see much weight difference from the fiberglass cloth. The whole tube area is about 1/3 yard so the difference between 6 oz and 2 oz cloth would be 1 1/3 oz for the whole tube, or 0.04 oz per inch.
The resin that makes up most of the weight when glassing the tubes. Can anyone tell me how much weight per inch or per sq inch I will add when glassing? I would suppect there is a difference when just glassing and when vacuum bagging. How big of difference in weight is there?
Does these same weights apply when doing TTT on the fins too? Would it be slight higher because of the resin soaking into the ply fins and BT?
I can get all the weights after I build and glass, but I need a pretty accurate CG estimate beforehand to determine what fin size to use and thus CP placement.
Thanks....
I know the weights per sqr inch of the plywood I'll use for fins and CRs, the weight per inch of the tubing, the nose cone, ect.
What I don't know and am having a difficult time estimating is the additional weight when glassing the tubes.
The 4" Loc tubes weight 0.4 oz per inch. If I put two layers of glass on it, what type of increase will I get. I don't see much weight difference from the fiberglass cloth. The whole tube area is about 1/3 yard so the difference between 6 oz and 2 oz cloth would be 1 1/3 oz for the whole tube, or 0.04 oz per inch.
The resin that makes up most of the weight when glassing the tubes. Can anyone tell me how much weight per inch or per sq inch I will add when glassing? I would suppect there is a difference when just glassing and when vacuum bagging. How big of difference in weight is there?
Does these same weights apply when doing TTT on the fins too? Would it be slight higher because of the resin soaking into the ply fins and BT?
I can get all the weights after I build and glass, but I need a pretty accurate CG estimate beforehand to determine what fin size to use and thus CP placement.
Thanks....