GPS (e.g. x3 geolink) bracket for model helicopter, 15mm boom.

thingiverse

For securing a GPS or patch antenna (or anything else flat and approximately 45mm square) on a 15mm diameter radio-controlled helicopter tail boom. Designed specifically for the Gaui x3 Geolink, but can also be used to mount other items, such as a backup gyro or FPV antenna. May also be useful for attaching components like radio mic receivers, video transmitters, mixers, etc. to 15mm rail DSLR shoulder rigs. Printed on an Anycubic i3 Mega, the dimensions of the screw holes were nearly exact for me, requiring no additional drilling out. The screw holes and nut recesses are intended for standard M2 pan head or cheese or hex head machine screws with 4mm AF nuts. Americans may be looking for something around 5/64" or 1/16", 9BA screws will fit easily, while 8BA screws might require a 3/32 drill bit through the holes but the nuts should fit okay. The 15mm guides came out as a snug fit for me. I printed the prototype in clear PLA because it was what was available in the printer. The clamp caps have been sliced on one side to remove the protruding boss, with the intention that they can then be printed with that side down on the bed, saving hassle. The caps will be stronger when printed sideways like this, and I wouldn't recommend printing them in place or standalone as "arches" - for one thing, unless you're printing in a resin bath or with soluble supports or something, they may droop a bit, deforming the 15mm hole, and for another, if the layers are arranged that way round then they are more likely to separate under load. The sliced-off bits are included in the STL so they can be super-glued onto the flat sides of the caps if desired, but there's little structural or practical advantage to this I don't think.