Thingiverse
Lego Boost Competition Arrow
por carlthingy
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Inspired by DrSnor's [Lego Boost Robot Spare Arrow](https://www.thingiverse.com/thing:3317558) I decided to make my own, more faithful to the original. I started afresh using TinkerCAD, the one Lego Boost arrow ("Competition Arrow") I possess, and a digital caliper.
The prototype was printed in two halves and glued together with cynoacrylate ("Superglue", "Crazy glue", "Sekundkleber") - it worked OK but the narrow rails that engage the spring in the shooter were too pronounced and not rounded like the original, and I had to trim them a bit. I reworked the model to round and narrow the rails.
Lego holes/studs are spaced at 8mm (well, very close to) and all Lego dimensions are integer multiples of 1.6mm.
The prototype is weighted with white-tac, as it tumbled in flight with the lightweight front - centre of gravity needs to be ahead of centre of pressure to get good flight. Two extra versions with built-in nose weight are included.
Lego is the trademark of Lego, no violat
The prototype was printed in two halves and glued together with cynoacrylate ("Superglue", "Crazy glue", "Sekundkleber") - it worked OK but the narrow rails that engage the spring in the shooter were too pronounced and not rounded like the original, and I had to trim them a bit. I reworked the model to round and narrow the rails.
Lego holes/studs are spaced at 8mm (well, very close to) and all Lego dimensions are integer multiples of 1.6mm.
The prototype is weighted with white-tac, as it tumbled in flight with the lightweight front - centre of gravity needs to be ahead of centre of pressure to get good flight. Two extra versions with built-in nose weight are included.
Lego is the trademark of Lego, no violat
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