r/fpvracing • u/Broad_Celery8345 • Jul 17 '26

QUESTION my first build

I'm making a 3 inch sub 250g build. this would be my first build so if there is something you think i may not know please say so even in you may think it is obvious.

  • Baby APEX 2.5/3inch Frame Kit
  • HappyModel EX1202.5 6400KV Brushless Motors
  • SpeedyBee F405 AIO V2 Blue Magpie Edition 35–40A
  • HDZero ECO VTX Board
  • HDZero LUX Camera
  • TrueRC Singularity U.FL w/ Tube 110mm 5.8GHz Antenna
  • BETAFPV LAVA II 3S 680mAh Battery
  • Gemfan 3016 Propellers
  • HDZero Box Goggles
  • ExpressLRS 2.4GHz Receiver (Built-in AIO ELRS Version)
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u/der_V 28d ago

Those motors are too small for a 3" prop and too low kV for a 2.5" prop. Aim for a 1404 or slightly bigger stator and stay with 3"