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2021 Events: Machines, Gravity Vehicle, Digital Structures/Boomilever
Gallagher MS '19
Barrington HS '23
In remembrance of Len Joeris (Balsa Man) and Dr. Gerard Putz - Don't cry because they are gone. Smile because they were here.
There are many many ways to make a good distal joint. You can see examples in the wiki picture gallery. This is just a starting point. In general, you need to have good enough surface area for the glue. You can start with 1/8"x1/16" wide brasswood stick for the tension chords. Glue the 1/8" wide face to the joint. Then, put two pieces of 1/8" wide balsa wood adjacent to that, one on each side. Apply glue to the edges where they contact the brasswood stick. Finally, put a 1/16" think piece of balsa on top to cover the whole joint. This vastly increases the strength because the brasswood stick is glued on both sides. Apply gorilla glue sparingly for this because it expands. Use a clip to gently apply pressure on the joint overnight.
Once you have a good joint, try to reduce the weight of the boomilever. The lower the better, but under 15 g should be easily achievable if you pay attention to the size and weight of the wood you are using.
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