LD-ish Boomerang

thingiverse

**Caution: This boomerang will not fly properly right off the printer. Please refer to the tuning instructions below.** This boomerang reminds me a bit of Volker Behrens' Geronimo Hook, as well as contemporary long-distance boomerangs. It is not a long-distance boomerang, but it does some nice mid-range circles if tuned properly. As printed, it will most probably not make a full return, but crash about half way into the flight. To compensate for that, **bend some dihedral into both wings, i.e., bend both wings upwards so that they are 1-2 mm off the table if you lay down the boomerang flat at the elbow.** The photo of the two wingtips above shows one untuned boomerang which is totally flat, and the other one has about 2 mm of dihedral bent into it. With the amount of dihedral, it should be possible to dial in some nice, low flights. Ideally, I like this kind of boomerang to stay nice and low during the whole flight. Throw low and with a bit of layover. The two boomerangs shown in the photo are both printed at 100% size with a .6 mm nozzle. Due to differences in infill percentage and wall thickness, one is 52 grams and the other one 45 grams, which makes a world of difference. The heavy one needs a much harder throw, but is more stable in higher winds. Generally, I prefer the lighter one, though.