Mike Bell’s #video on #manufacturing the #Guinness winning #Peregreen-2 #flying #drones explains why they wanted inherent stability: so they wouldn’t have to waste differential thrust on stabilization. He explains the batteries were 48V, 12S, 1500mAh × 2, 160C (!!!). To smooth the transparent canopy they printed it from PVA (!!) and misted it with isopropanol for days. Apparently he designed the shape in Blender!
on 02024-07-31#video on Luke Bell and Mike Bell #manufacturing #Guinness winning fast #flying #drones called "Peregreen 2", in part by CNC-cutting frame parts out of a carbon-fiber-reinforced plastic sheet (#sheet-cutting). Because streamlining was a top concern, it’s sort of rocket-shaped, which they played with by printing a transparent tail and illuminating it from within. Their fake batteries caught on fire, their motor wires caught on fire, their motor wires desoldered themselves from the ESC, their ESCs caught on fire, their PID control loops went out of control and crashed the drone, their motors turned out to be anemic, rough skin produced excessive drag, etc. But finally they got it to go 133m/s average over 100 meters, 142m/s peak. They were using FPV flying with goggles.
on 02024-07-31