Instruction manual

Step 2: Installing the Tail Boom Supports

Parts Required

Bag#

6 #0003 M3 Washers B Large 11C

2 #0093 M3x18 Phillips Bolt 11C

4 #0048 M3.5x25 Socket Set Screw 11C

2 #0872-5 Graphite Tubes 25@ 11C

2 #3923-1 Plastic Round Spacers 11C

4 #0872-2 Molded Boom Support Ends 11C

1 #0065 M3x12 Socket Head Bolt 11C

2 #0009 M3 Washers B Small 11C

1 #0019 M3 Locknut 11C

2 #0079 M3x35 Socket Head Bolts 11C

Refer to Drawings #11C

and #11C-1

A. Select four #0048 M3.5x25 Socket Set Screws and two #0872-5 Graphite Tubes. Clean each set screw

thoroughly with alcohol or lacquer thinner. Use a cotton swab (Q-tip) to clean inside each end of each carbon

tube. Roll a small piece of 180 - 220 grit sandpaper into a small tube and use it to roughen the inside surface

at each end of each tube.

Select four #0872-2 Molded Boom Support Ends. Each has a 5.75 mm diameter hole in the end followed by a

3.0 mm diameter hole set approximately 10.0 mm deeper. Install one #0048 set screw from Step A into each

3.0 mm hole so that approximately 7.5 - 8.5 mm is exposed past the end of the Molded Boom Support End.

Examine the “ball end” of the #0872-2 Molded Boom Support End. The factory installed ball has a molded

“boss” of approximately 6.3 mm diameter on either side of the ball. One side protrudes 1.0 mm while the

other is 1.5 mm. The 1.5 mm thick side should always face the mounting surface to which the tail boom brace

will be fastened. This is of particular importance at the front mounting positions.

B. Remove one of the #0075 M3x25 Socket Head Bolts that are temporarily securing the rear landing gear strut

to the landing gear mount. Select four #0003 M3 Flat Washers, two #0079 M3x35 Socket Head Bolts, two

#3923-1 Plastic Round Spacers, and two of the prepared Molded Boom Support Ends from Step A. Install

one washer onto one #0079 bolt and insert into the brace end with the shorter molded “boss” (as discussed in

Step A) nearest the washer. Slide one #3923-1 spacer onto the opposite side of the brace end and insert the

assembly into the hole within the landing gear previously occupied by a #0075 bolt. Reinstall the washer and

lock nut beneath the landing gear strut. Remove the remaining #0075 bolt on the opposite side of the landing

gear mount and repeat the above procedure.

C. Select the #0872-5 Graphite Tubes and the two remaining prepared Molded Boom Support Ends from step

(A). Note the 1.5mm hole on each brace end. During proper assembling, a small amount of glue will exit this

hole.

Graphite tubes can be bonded with “J-B Weld” epoxy (or similar slow curing epoxy) or slow CA glue. The

epoxy allows much more time for the assembly steps while the slow CA glue will allow only a minimum

working time. Be prepared if CA type glue is used.

D. Apply a liberal amount of your chosen adhesive to the threads exposed on the brace end and inside the

graphite tube end. Insert one tube into one brace end until it stops (about 9.5 - 10.0 mm) and secure it from

moving while the glue sets. Repeat for the remaining brace.