Since I get to carry my completed but uncovered wings in and out of my garage at every building session, I can tell you that they are not heavy, maybe 50lbs. with all hardware. Therefor I don't think the weight savings will be significant. And who used marine grade? A/C birch is what I used. I didn't use a lot of nails on the capstrips either. I used tape. dale Frank Stutzman wrote: > FlyBaby > > Bowers sez in the plans that you could use 1/16" aircraft grade plywood > for the ribs. It would cost a lot more, but there would be noticable > weight savings over 1/8" marine grade. > > Has anyone done this (or seen it done)? Sounds good except when it comes > to attaching the rib caps. It would be pretty tough to accurately put > nails through the rib cap and into the edge of a 1/16" rib (which what it > shows in figure 4-12 of the plans). > > Am I correct in thinking that the nails only provide the clamping pressure > for a good glue joint? If so, if one were able to work up a good way of > clamping this, the nails could be done away with? > > Frank Stutzman > only on chapter 4 of the plans