17
Step 18 Clutch, Fan & Engine Mounting
Clutch
Shoes
[HW3011]
M9x14 Flat
Washer
Engine ball
bearing
exposed.
Thrust Washer
or M9x14 FW
From parts bag 3, remove all parts
from the engine crankshaft until you
can see the front ball bearing, install
the 9x14mm Flat washer (or washer
provided by engine manufacturer),
insert the Ball Bearings into the
clutch bell assembly and place on the
crankshaft. Clean the threads (
Tip 1
)
on the crankshaft, engine nut and the
clutch, carefully apply threadlock on
the engine crankshaft threads nearest
the bearing (be careful not to get
threadlock into the ball bearings) and
on the threads in the clutch. Thread
the clutch until the crankshaft can be
seen and insert the fan keying it to the
clutch. Wrap a cloth over the fan
(provides grip to the fan without
breaking the fins) and tighten until
the clutch stops, torque an additional
1/16 of a turn. Using a Piston Lock
[CN2155 Optional Parts] makes this
easier. Secure the fan by placing one
6.5x13mm Washer and apply a liberal
amount of threadlock to secure the
nut that came with the engine from
the inside of the fan assembly. Again
only torque the nut 1/16th more.
Cooling Fan
[HI3009]
M5x13 Flat
Washer
Engine
Nut
(Optional Parts)
CN2153 Throttle Extension for
OS32-37 & TT39
CN2154 for OS50SX-H
M3x16CS
Machine Screw x 4
Engine
Assembly
with Fan
Secure the engine assembly on to the engine mount
(46/50 make sure the mount is installed with the holes
closest to the bottom of the engine) using four
3x16mm Socket Cap Screws using threadlock. From
bag 4, install the Throttle Extension by removing the
arm supplied on the engine. The arm has to be
repositioned to get equal throw, both open and closed
from 50%.
Engine Mount
[HW3017] - All 30
Throttle
Extension
[HW3204]
Throttle arm on Carburator
During final assembly wipe
all traces of oil or grease from
the inside surface of the
clutch lining. Any grease
here can cause a meltdown.
M12 x 18
Ball
Bearing x 2
[CNBB1812]
Aluminum
Clutch Bell
[HI3010A]
Pre-Assembled in kit.
Pinion Gear
26T
[HI3010B]
Step 19 Engine Mount & Throttle Lever
50%
Full Open
Full Closed
Engine
Mount [HW3018]
OS 50
Note: Upright (Top) direction of mount.
Position two of the pushrod guides infront of the
horizontal fin and one behind. Attach the Horizontal
Fin on the tailboom using two 3x12mm Self Tapping
Screws through the fin, the fin mount and into the
Tailboom Clamp. Space the fin along the tailboom
at the position where the Tail Boom supports
intersect the tailboom.
Note: the mount for the
strut is angled, test fit the strut to position the
clamp in the correct direction
. Secure each strut
one at a time using one 3x8mm Self Tapping
Screw through the strut hole and into the horizon-
tal fin clamp. Attach the lower end to the outside
of the lower frame assembly using one 3x16mm
Socket Cap Screw inserted through the hole in the
strut, then add one 3mm plastic spacer and finally
through the hole in the lower side frames, secure
with a 3mm Locknut from the inside.
Horizontal Fin Set
[HI3067A]
M3X12 Self
Tapping Screw x 2
Tail Boom
Clamp
[HI3067A]
M3x16 Socket
Cap Screw
M3x8 Self
Tapping
Screw
Tail Boom
Support Struts
[HW3202B] - R30
[HW3202C] - R50
Step 38 Tail Fins & Support Struts
M3 Plastic Spacer
M3 Locknut
Ball links can be attached to both ends of the rudder pushrod and the pushrod guides can be adjusted in
position to get smooth actuation from the rudder servo to the tail rotor bellcrank. Once the pushrod moves
smoothly, apply a few drops of medium CA glue to bond the pushrod guides in place. It is extremely
important that the guides are bonded, as a loose pushrod guide will move, continually changing the center
or neutral position of the rudder channel. This will affect all other setup adjustmenst and make flying the
helicopter difficult to impossible.
Medium CA glue
Medium CA glue
