Socket cap screw
M3x18mm ( × 2)
M3 Nylon locknut ( × 2)
Main rotor 420mm ( × 2)
M4X-71mm tail blade ( × 2)
Shim
∅ 2x ∅ 8x0.2mm ( × 4)
4-3 Rotor blade installation
Main rotor 420mm ( × 2)
Shim
∅ 2x ∅ 8x0.2mm ( × 4)
※ This washer is only required for 2.6mm
root blade, such as RT-71, as well as the
OMPHOBBY 71mm tail blades. RT-72
don’t require these.
M4X-71mm tail
blade ( × 2)
Socket cap screw ( Thread
length 4mm)
M2x12mm ( × 2)
M2 Nylon locknut
(× 2)
Socket cap screw
(Thread length 4mm)
M2x12mm ( × 2)
Socket cap screw
M3x18mm ( × 2)
M2 Nylon locknut ( × 2) M3 Nylon locknut ( × 2)
※ Properly tighten the main and tail rotor blades so that they
do not fall under their own weight, but are easy to move in the
blade grips. Over-tightening may cause damage to the rotor
blade and compromise flight safety.
※ Please make sure to only use precisely balanced tail rotor
blades from reputable manufacturers. The M4's tail rotor spins
at very high RPM during flight, even slight imbalances in the tail
blades can place high stress on the tail mechanics.
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M4X-403
Installation steps 安装步骤
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