ZOHD Drift "Super Drift" Modification - 3S1P 21700, DJI O4 Pro + Pan Servo

Can you even call this a Drift anymore? Has Drift gone too far? Well, you'll find out here! --- ### Features - Revertible, non-permanent modification; just remove 2x bolts if you'd like to go back to stock configuration. - Capable of fitting 3S1P 5000mAh 21700 pack, DJI O4 Pro and pan servo simultaneously! - Magnet-based easy to detach covers. --- ### Development History The "Super Drift" is a final evolution of my [backpack mod](https://www.thingiverse.com/thing:6815928) and unreleased ones like "Horizontal Thrust Line Motor Mount" modification. After I made my DJI O3 backpack for the Drift, it quickly became my go-to aircraft for scout flight mission, where you'd flight within 2.5km radius to check potential places for larger airframes to land. Sometime in last November, I've decided to upgrade my existing 2S setup to 3S, fitting 2000mAh LiPo to the nose. As a result, the nose became heavy, so I designed a conformal motor mount which also acted as a ballast(see the last picture). With upgraded motor and battery, I was able to routinely fly the Drift up to 6km and back. And soon, I had desire to fit 21700 Li-Ion pack on the airframe. Some trial & error and one airframe broken(rip) later, it resulted in the "Super Drift" modification, and I'm happy to share it with you! Note that this modification significantly alters flight characteristics; fly with caution, especially watch out for OVERSPEED. THE AIRFRAME IS NOT MEANT TO SUSTAIN > 20m/s FLIGHT CONTINUOUSLY (as I found the hard way around)! Use full throttle only for climbing, and fly in calm weather. The airframe is not suited to be used for "penetrating scout" role. --- ### Required Parts - 8x 6x2mm Neodymium magnet - 2x M3 nut - 2x M3 10mm bolt - 1x M3 15mm bolt (replaces stock plastic wing bolt) - 2x M2 nut - 2x M2 6mm bolt - 8x M2 4mm bolt (most likely be included from purchased motor) - 300mm battery extension cord - (Recommended) 2x 10cm servo extension cord for flaperon setup --- ### Printing & Assembly - Use supplied orientation for parts. - "Motor Mount Interface": PETG, 2 wall, 100% infill - "Motor Heatshield": (any high-temperature material), 2 wall, 100% infill - "Front Cover": TPU 60D, 1 wall, 10% infill (adaptive cubic), REMOVE SINGLE WALLED SURFACE after printing (the surface is there just to provide stability for fast TPU prints - FOR ALL OTHER PARTS: PETG, 1 wall, 10% infill (adaptive cubic) - FOR ASSEMBLY INSTRUCTION, check the pictures for detail. --- ### Reference Configuration - Flight Controller: Speedybee F405 WING MINI - ESC: Stock 30A - Motor: RCINPOWER 1507 SmooX 3800KV - Prop: HQProps 4x3x3 - Battery: 3S1P 21700 (Molicel P50B) - GPS: MicoAir M10 Ultra - RC RX: RadioMaster RP4-TD - VTX: DJI O4 Pro - AUW: ~650g --- ### Reference Performance - Cruise speed: 14m/s (~50km/h) - Stall speed: 9m/s (~32km/h, without flaperon) - Landing speed: 7m/s (~25km/h, with full flaperon down) - Never exceed speed: 28m/s (~100km/h) - Climb speed: 9m/s (full throttle) - Cruise range: 30km (with 10% battery margin)