Just starting construction of a slightly downsized Staris for my PA40UL as per Randy's recommendation.  I have only built one other SV design [Novar] and it came out on the heavy side.  On the Novar I used plywood [either 1/16 or 3/32] fuse doublers instead of the balsa/cf lamination.  Even thought I think the heavy weight on the Novar had much more to do with the finish than the doubler material, this time I want to stick to the plan and use the balsa doublers.  So I wanted to ask those who have built SV's in the light to moderate weight range what weight balsa did you use for the 1/8" balsa fuse sides and also the balsa doublers.  

Why not get the SV 40 plan from Randy and build that?

Do you know span and area on the SV 40 ?  That design is listed as a 35-40 engine size.  The downsized Staris will be around 56" and 620~630 area which Randy said is a sweet spot for the 40UL.

Just starting construction of a slightly downsized Staris for my PA40UL as per Randy's recommendation.  I have only built one other SV design [Novar] and it came out on the heavy side.  On the Novar I used plywood [either 1/16 or 3/32] fuse doublers instead of the balsa/cf lamination.  Even thought I think the heavy weight on the Novar had much more to do with the finish than the doubler material, this time I want to stick to the plan and use the balsa doublers.  So I wanted to ask those who have built SV's in the light to moderate weight range what weight balsa did you use for the 1/8" balsa fuse sides and also the balsa doublers.  

Hi Allan
I use light 6 pound wood for the fuse side, and a little harder/stiffer B or  C grain for the doublers, this will yeild a very strong fuse side, that has a thicker edge for the cowling to sit on, and is not a flexible as the thin ply way, it also absorbs vibration better, and has a larger are at the edge for the wing glue joint.

Randy

Well like I said I want to stick to the plans design this time.  I like what Randy pointed out about the wider seating surface for the cowl and wing, and also the vibration absorbtion.  But just for comparison when I get the balsa doublers made up I will weight them to compare to various thickness plywood doublers.