Secure Wing Hold-Downs

Has your model’s nylon wing hold-down bolt ever come loose during flight, no matter how tightly you secured it? Here’s a simple solution to keep the bolts in place. Bend a piece of music wire into a retainer clip. Drill two small holes in the finger tabs on the top of the bolts, and slip the retainer wire into place. Shape it so that it works like a safety pin, with one end bent into...