LOS, FPV and Tubular Framed Quads
TRX Quads
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190mm Line of sight frame
44 grams
5mm Arms
30.5x30.5mmx3mm Flight controller and 4in1 ESC holes
16x16x3mm Motor mounting holes
Use 14mm screws with standoffs or 16mm screws directly through 4in1 ESC.
Centre plate for bonded tubular frames.
See this RC Groups thread :
https://www.rcgroups.com/forums/showthread.php?2645953-Mini-tubular-and-ultralight-LOS-Acro-FPV-Quads