Specifications

• Slide the part onto the drill bit

• Hold the part with your fingers

• Turn on the drill at low speed

• Using your fingers, Move the part in a circular motion so the drill bit will touch the sides of

the hole to widen it slightly.

There are a few steps which involve CAing together two smooth plastic parts or a plastic part

and a carbon fiber part. The CA will not adhere well to smooth parts, so you should roughen

the areas to be glued with 400 grit sandpaper for better adhesion.

Making CA joints

Step 1 - Main Body Assembly:

The joint between the frame base (E402) and the frame support (E403) will be much

stronger if you use 400 grit sandpaper to roughen the area underneath the frame support

so the CA will stick better.

Step 2 - Tail Rotor:

Do not force the bearings onto the tail drive shaft (E417). If you try to force the bearings

onto the shaft, the shaft may split. It is much better to use some 400 grit sandpaper to

sand down the shaft slightly so the bearings will slide on.

Step 2 - Tail Rotor:

The pinion (E118) and the gear (E028) which are supposed to fit on the ends of the tail

drive shaft (E417) have holes which are too small and the gears will get stuck halfway onto

the shaft. Please use the "enlarging hole" trick so the pinion can be slid onto the shaft

without becoming stuck. If you widen the hole too much, then the gear/pinion may slip. You

can fix this by smearing some thin CA into the crack between the pinion and shaft AFTER

you have put the gear/pinion on the shaft.

Step 2 - Tail Rotor:

The bell crank (E026) will not pivot smoothly on the tail gearbox (E425). There are multiple

problems which must be fixed for this bell crank to pivot smoothly:

• The bell crank is too tight on the tail gearbox. You will need to do three things to fix this

problem:

i. Polish the pivot pin with some extra-fine sandpaper (800 grit or better)

ii. Use the "enlarging hole" trick on the bellcrank pivot hole to enlarge it slightly.

iii. Use the "enlarging hole" trick on the bellcrank hole for the slider cage CP (E091).

Be very careful enlarging this hole because it doesn't need to be enlarged much.

• There are bits of flashing left on the tail gearbox (E425) in two places which rub against

the bellcrank. These look like small circles. Use some masking tape to protect the bear-

ings from the plastic dust, then use a small needle file to remove the flashing so the

bellcrank (E026) pivots smoothly.

• Use powdered graphite to lubricate the bellcrank pivot hole before using CA on the

plastic retainer (E027).

Step 2 - Tail Rotor:

The holes in the tail hub (E431) are not tapped very well. Screw in a stainless steel M2

Helicopter Construction