Instruction manual

C. Select two #0006 M2.5 Atoothed@ Lock Washer, four #0015 M2 Hex Nuts, two #0043 M2x12 Slotted

Machine Screw, two #0477 Push Rod Guide Supports, and two #0868-5 Push Rod Guides. Wrap the #0477

support around the boom as shown in the drawing and install one #0043 screw from above and a #0015 Hex

Nut from below. Tighten only enough to allow adjustment. Slide one support to a position approximately

285mm from the forward end (Canopy side forward) of the tail boom and the second support approximately

295mm from the rear edge of the first support.

Install one #0868-5 Pushrod Guide, one #0006 Lock Washer, one #0015 Hex Nut, and one #0044 M2x12

Slotted Screw into the horizontal hole within each of the #0477 Push Rod Guide Supports.

D. Select one #0019 M3 Hex Locknut, one #0063 M3x10 Socket Head Bolt, three # 0032 M2.9x9.5 Phillips

self-tapping screws, the #0683 Tail Rotor Gearbox Clamp, and the previously assembled tail rotor gearbox.

Examine the #0683 Clamp and note that the rear is the side with three horizontal holes. Slide the clamp onto

the rear of the tail boom until it is even with the end, oriented so the slot within the clamp is centered over the

notch in the tail boom. Apply a small amount of grease to the torque tube drive end. Press the gearbox into

the boom, fully engaging its molded Akey@ into the tail boom notch. Align the clamp with the gearbox housing

and install three #0032 Self Tapping Screws with a small amount of slow CA glue on each. Do not over-

tighten. Confirm that the gearbox is fully inserted into the tail boom by tapping on its rear flanged surface

with a plastic tool handle or wooden block. Tighten the clamp about the tail boom by installing one #0063

Socket Head Bolt and one #0019 Locknut into the hole provided. Do not tighten so much as to distort the

clamp.

E. Examine the upper surface of the gearbox clamp and note a small hole at the center. This hole must now be

duplicated in the tail boom. Using a 1.30mm (0.055@) drill bit, drill straight upward through the hole and into

the tail boom. Use light force so that it is easy to stop drilling as soon as the drill breaks through and

resistance stops. Select the #0024 M2.2x4.5 Phillips self-tapping screw and install it into the drilled hole.

This particular length screw will protrude partially into the gearbox housing but not contact its input shaft (do

not make any substitutions). As an extra precaution it is suggested that the #0683 clamp be glued to the tail

boom by Awicking@ a light bead of thin CA glue around the front edge of the clamp where it meets the tail

boom. Let dry naturally without accelerator.

F. Select two #0027 M2.2x9.5 Phillips self-tapping screws, two #0032 M2.9x9.5 Phillips self-tapping screws,

one #0589-4 Horizontal Fin. Install the horizontal fin atop the #0870-1 Horizontal Fin Mount with two #0027

screws. Install the #0589-5 Vertical Fin onto the #0683 Gearbox Clamp using two #0032 screws.

G. Select eight #0003 M3 Flat Washers, four #0019 M3 Hex Locknuts, four #0077 M3x30 Socket Head Bolts,

and two #0186 Front Tail Boom Clamp Halves. Examine the drawing and note the hardware securing the

front tail boom clamp halves to the main frame. Leave all bolts loose.

Apply a small amount of grease to the tube drive end. Install the tail boom into the #0186 clamps. Hold the

main gear while rotating the tail rotor hub and apply pressure forward on the tail boom assembly. After less

than one rotation, the tail boom assembly should move further forward (verify that the torque tube universal

joints are properly engaged). Push the tail boom as far forward as possible. DO NOT PULL BACK ON

THE TAIL BOOM. THE STOP MOLDED IN THE BOOM CLAMP IS DESIGNED TO ALLOW

FREE-PLAY IN THE TORQUE TUBE. Lightly tighten all four mounting bolts. View the model straight

from the rear and rotate the boom as needed to ensure that the gearbox output shaft appears perpendicular to

the main shaft. Apply slight pressure forward on the tail boom while tightening all four boom clamp bolts.