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Old 03-18-2021, 05:40 AM
  #18  
gonzalobures
 
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Join Date: Oct 2013
Location: Toa Baja, Puerto Rico
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Repairs and beefing up what I consider a design which can be improved.

Both sides repaired. Also triangular stock was epoxied to main wing spar/rib joint pinned with hardwood dowels.

Left wing

Doubled 1/8" original retract mounting rib with 5/16" plywood and balsa rib with 1/8" plywood. This was done on both ribs on the other side of this same retract as well as on the right wing. Hard wood spars were also installed tying uo the 4 ribs since the lead edge is not a strong point due to retract penetration.

Doubled 1/8" original retract mounting rib with 5/16" plywood and balsa rib with 1/8" plywood. This was done on both ribs on the other side of this same retract as well as on the right wing. Hard wood spars were also installed tying uo the 4 ribs since the lead edge is not a strong point due to retract penetration.



To improve lead edge strenthgt, a 1/4" plywood brace was epoxied tying the lead edge to both ribs.

Done on both sides of the ribs and both wings.