Futaba GV-1 - Manual (Page 7)

PRECAUTIONS
Operating precautions
At the beginning of flight, keep the governor in the OFF
state by setting the throttle stick to no more than 20% from
the slow side.
While the engine is running, turn on the governor at the point which the throttle
stick is at least 20% from the slow side and the engine speed exceeds 70% of
the set speed.
When the model is on the ground, lower the pitch to the
position at which the model does not try to lift off. Do not
take your eyes off the model.
When the governor operates and the rotor speed increases the lift also in-
creases causing the model to try lift off , depending on the pitch position.
Periodically check the sensor output.
(Check method: Page 46)
The magnet rotates at high speed and is subjected to a large centrifugal force.
Check the sensor output and mounting state about once every 10 flights.
If the model begins to shake during operation, immediately
turn off the governor.
(See "Governor on/off operation mode setting" on page
29.)
When engine speed is not stable at high R.P.M.'s
The carburetor design, etc. may cause the engine to operate
unstable. If this occurs, lower the maximum speed setting to the
range over which there is no problem.