Great Planes HyperFlow Ducted Fan System - GPMG3910/3911 - Manual (Page 6)

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6. Attach the aft cone to the fan housing with a couple
drops of CA glue or tape. Excess glue will make it diffi cult to
remove the motor from the housing should it be necessary
in the future.
Installing a Brushless Motor
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1. If installing a 20mm brushless motor, press the motor
adapter onto the rear of the motor can prior to sliding it into
the fan housing. The motor adapter is keyed to fi t over the
three alignment guides inside the fan housing. Push the motor
up against the mounting plate, aligning the motor mounting
holes with the slots. Depending on the model motor being
used, you may need to cut away a part of the fan housing
in order for the motor to sit fl ush against the mounting plate.
Use the molded recess as a cutting guide.
IF INSTALLING A 24mm MOTOR (ONLY)
If installing a 24mm brushless motor, the three alignment
guides inside the fan housing must be trimmed prior to
inserting the motor (a hobby knife works; however, a rotary
tool such as a Dremel makes the job much easier). Slide
the motor into the housing, positioning the screw holes in
the motor with the slots in the mounting plate.
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2. Secure the motor to the fan housing using two 3 x 5mm
fl at head screws with threadlocking compound.
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3. There are brass fan rotor adapters provided for 2mm,
2.3mm, and 3mm motor shafts. Select the adapter that
fi ts your motor shaft and install the 3mm set screws with a
1.5mm wrench into the hexagonal base.