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Fig 1:
Figure 1 shows the motor correctly
wired. This drawing shows the connection
between the motor and ESC using very
short cables.
Fig 1:
Figure 1 shows the motor correctly
wired. It is advisable to cover the wire
joints between the motor and the ESC
with heat shrink tubing.
2 mm
0.75 mm 0.75 mm
Big Motor Belt
(HC309-S)
MOTOR BELT TENSION
*Assemble the motor and pinion to its
mounting plate.
*Fit the motor assembly into position.
*Compress the springs by pushing the
motor toward the main shaft.
*At maximum compression, temporarily
tighten one of the slide screws.
*With the minimum centre distance it is
easy to install the belt. First put the belt
on the motor pinion.
*Then put the belt around the big pulley.
*Rotate the motor several times by hand.
*Release the screw that locks the slide.
*The springs keep the belt in tension.
*Help the springs by pulling the motor
slightly.
*The belt must be very tight.
*Lock all screws.
Motor Assembly
Note:
Check for vertical
alignment of the motor pulley.
To do this, simply turn the
motor several time and check
to you see if the belt is aligned
with the big pulley ( one way
bearing pulley ). If the belt is
riding too high, simply loosen
up the motor pulley and drop
it just a little bit, if it is riding
too low, loosen up the motor
pulley and raise it a bit.
Correct
Incorrect
TRANSMISSION SETUP
In order to select the correct motor pulley, please read page 32
The Goblin has many possible reduction ratios at your disposal. It is possible to optimize any motor and battery combination.
It is recommended to use wiring and connectors appropriate for the currents generated in a helicopter of this class.
If you are using a head speed calculator which requires a main gear and pinion tooth count, use
214
teeth for the main gear
(this takes into account the two stage reduction) and the tooth count of your pulley as the pinion count.
Below is a list of available reduction ratios
:
H0175-18-S - 18T Pinion = ratio 11.9:1 H0175-22-S - 22T Pinion = ratio 9.8:1
H0175-19-S - 19T Pinion = ratio 11.3:1 H0175-23-S - 23T Pinion = ratio 9.3:1
H0175-20-S - 20T Pinion = ratio 10.7:1 H0175-24-S - 24T Pinion = ratio 8.9:1
H0175-21-S - 21T Pinion = ratio 10.2:1 H0175-25-S - 25T Pinion = ratio 8.6:1
Copyright © 2013 - SAB Heli Division - All rights reserved
Page 18
Chapter 9, Installation Of The Motor
20


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