A custom design using old motors I had (Emax 1806). Flies great on a 850mAh 4S with high pitched props (like Gemfan 4052). I get up to 7min flight time.
Arms will fit 12mm to 16mm M2 motor mounting patterns. 20x20mm stack
Carbon plate weight is ~26g, so a sub-250g build is achievable with the right components (mine weights 280g with a 850mah 4S)
Canopy will fit Caddx Ratel lens and can be downloaded from