Original Posted By: Greg Yotz
I have seen several references to 3/4" spars and was wondering if this isfrom a later set of plans. My '33 plans show 1" routed spars and no pieceson the ribs to glue against the spar face. This is how I built my ribs andthere is a definite springback when removed from the jig, particularly inthe area of the spars. Not concerned about it as when installed on thespars they will be fine. I really like the idea of building spars with 1/8 Baltic birch facesover two 1x3/4" spacers. Of course I need to see a stress analysis beforeI build them. Anyone know the strength of 1/8" Baltic birch 3 ply? Seemsto me as long as its over twice that of spruce the spar would be as strongas the routed variety. Wayne Sippola Winnipeg MB________________________________________________________________________________