I have a couple balsa/monocoat 3-d planes and have experienced gear failure on any less than perfect landings. Either the lightweight spring steel bends or the entire structure is ripped out. The area where the gear attaches to the fuse is usually very weak and does not allow for any flexibility as foamies do. In order to save myself a major repair job I found that applying spray insulating foam in the area of the firewall, gear & wing attachment provides a great deal of strength for minimal weight. I apply liberally and wait 24 hours, then cut and carve the areas needed for airflow, bat. bays, ect. Since using this mod I have had no incidents.
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