Step 18: Building Tail Case
Parts List
The next step is to build and install the
tail-boom and gear-case assembly. First
you need to install the bearings into the
tail gear case side plates. You do this the
same way as with the bearings in the main
frames. Make sure that the flanges on your
bearings are facing the inside. Take the
rear tail gear case side- plates and
fasten one side to the rear tail-case hub.
Next, attach the tail-rotor assembly to
the tail output shaft using a 3 X 3mm set
screw. Install the shim balls onto the blade grips
with the 2 X 8mm phillips screws. You should
use the holes that are farther away from the center.
Now slide the tail-pitch slider onto the tail output
shaft and attach the plastic ball-links. You will
need to adjust this assembly later. Slide this
assembly and shaft into the attached side-plate.
Begin attaching the pulley to the shaft,
but first slide the first of the two
pulley-spacers onto the shaft. The pulley
will now attach to the shaft using a
3 X 3mm set-screw this set-screw
will fit nicely into the index hole on the
shaft. Now slide the belt through the tail
boom and around the rear tail pulley. Put
the other spacer on the tail output shaft
and attach the other side plate to the rear
tail case hub. Next, attach the rear tail
case cross-member using two 3 X 6 mm
cap head bolts. Finish building the tail
case by mounting the tail pitch control-lever
mount and tail pitch control-lever. Attach
the mount with 2 mm X 7mm phillips head
bolts to the tail-case side-plates. Finally,
attach the tail pitch control-lever to the mount
using 2 x 10 mm Phillips Screw. Attach
the tail idler-pulley using 3 x 25mm Cap
Head Bolt & 3mm locknut. Also, place
the 5.5mm spacers on either side of the
idler-pulley and slide between the
tail-case side-plates.
3 X 3mm Set Screws (2)
Tail Rotor Assembly (1)
Tail Rotor Blades (2)
Tail Output Shaft (1)
Rear Tail Pulley (1)
Tail Pulley Spacers (2)
Tail Idler Pulley (1)
2.0mm Med Ball Links (2)
Tail Case Crossmember (1)
Tail Pitch Slider (1)
Tail Pitch Change Lever Mount (1)
Tail Pitch Change Lever (1)
Tail Drive Belt (1)
Tail Boom w/Tail Case Mount (1)
3 X 6mm Cap Head Bolts (6)
2 X 7mm Phillips Head Screw (2)
3 X 25mm Cap Head Bolts (1)
3mm Lock Nuts (1)
5 X 10 X 4 Flanged Bearings (2)
2 X 10mm Phillips screws (1)
2 X 8mm Phillips screws (2)
Shim balls (2)
Tail Gear Case Side Plates (2)
