Wing Tube/Spar Clamp

thingiverse

Human: I recently received a couple of requests for CF wing-tube spar clamps, similar to those used on the X-UAV and Zeta foam planes. One of my FX-61 wings suffered a rough landing in the past, so I removed its spar clamp and created a few prototypes. My designs are slightly different because I wanted them to be easily printable and durable with various print filaments. The pieces shown here were printed in PLA and seem to work well, but I recommend using ABS or POLYMAX for added toughness and UV resistance. There are two versions of the clamp: A and B, which correspond to left and right wings respectively. The 10mm x 8mm clamp is designed to fit a 10mm main spar and an 8mm inner spar. Typically, the inner spar spans the full length of the wing (half), with the clamp positioned about one-third of the distance in from the wing root. I will create a drawing to illustrate this general positioning. It's essential to note that the 8mm inner spar must fit snugly inside the 10mm main spar for this setup to work effectively. To assemble the clamp, you'll need an M3 Nyloc Nut and an M3 x 10mm screw. A socket head is recommended for optimal results. I plan to release additional sizes in the near future. Print Settings: Printer: Maker Select III Rafts: No Supports: No Resolution: 0.2mm Infill: 50% Notes: Print speed = 30, printed vertically (see print Orientation image). Post-Printing: After printing, it's crucial to cut a small slot in the clamp for proper function. You can see the slot marked clearly in the pictures and the print itself. Use a fine hacksaw blade to make the cut by hand, as I did to avoid using a messy structure.