Circularly polarized FPV antennas for RC planes and multirotors are not hard to make but they do take a beating if you crash - which is pretty often if you have a mini quadcopter.
This video shows you how to add valuable extra physical protection for your home-built clover-leaf FPV antennas and features my delightfully unreliable and inconsistent cheap digital scales (please excuse the cursing and swearing) :-)
The original video on making your own DIY clover-leaf antennas can be found here:
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HEE Wing F-01 Ultra Delta Wing 690mm - upgraded Mini AR Wing? Diatone Reaper 690
#Shorts massive servo wire attack