Through-bolt Arm & Bottom Plate for Crossfire 2

thingiverse

I encountered major problems after experiencing what I consider to be two minor crashes with the original arm & bottom plate design. As a newcomer to Naze32 tuning, I was consistently crashing a ton. The problem lay in the 3mm nylon locking nuts on the outside bolt holes, which would almost always pull out of the arms. Even minor hard landings caused this issue for me. It necessitated using CA glue repeatedly - and often at inconvenient times - to try and secure the nuts in the arm. This was extremely disappointing since I had to leave my local field frequently to drive home and fix it. The solution for me involved converting the outer arm bolts to a through-bolt design, incorporating the 3mm nylon locking nut into the bottom plate instead. This created a top & bottom plate sandwich configuration. Since switching to this design, I have not encountered any issues. To replicate my setup, you will need eight 3m x 40mm bolts, which can be found at the following link: https://www.amazon.com/gp/product/B00W97R5KU/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1 I have also uploaded a v2.0 design where I enlarged and spread out the velcro slots to properly secure 6000mAh+ batteries on my Crossfire 2. In this revised design, I removed the vibration dampener holes since the mass of the batteries precluded using the under-quad camera mount. You will notice a rectangle on the rear of the plate; this is where I have been placing my FAA ID # with 3d text. I considered extending the inner holes on the legs to accommodate this design feature on all four sides, but it has so far been unnecessary. On the v2.0 plate, I deleted these entirely. Print Settings Printer: Wanhao Duplicator 4S Rafts: No Supports: Yes Resolution: .30 Infill: See notes below Notes: I used 40% infill on the plate and 70% on the arms due to some breakage issues I had experienced. A small amount of support was required for the m3 nut holes on the mount with vibration dampeners, but no supports were needed for the v2.0 bottom plate.