Chapter – X
Assembly and struts of the tail boom
( Assembly Group 8 )
At first push the tail boom into the clamping flanges of the mechanics as already described on page 16 and adjust the correct
position of the pinion to the crown gear. This is easy, if you have wrapped, as recommended, an adhesive tape around the
boom at the corresponding place. Tighten the nuts of the two lower threaded rods to locate the tail boom in position.
Attention! Don´t tighten the nut of the bottom thread rod 0237a from the front boom support 0232 to hard because this can
damage the bearing 0828b of the bearing flange 0828a because of to much pressure onto the flange.
The strut clamp 0809 with the push rod guide from the tail boom assembly group can be put onto the tail boom before or
subsequently. It can be widened far enough without breaking.
Mount the boom support ends on both sides of the tail struts (see image above). At first, attach the M3.5 threaded rod 0807a
on one side using superglue, so that it still protrudes by 12mm (upper drawing). Put the threaded side into the carbon boom
which has been sawed off and de-burred only roughly because in this area the thread is mostly damaged.
On the opposite side the boom support end 0805 is glued with superglue (lower drawing). Roughen the first 10mm of the
carbon strut using some sandpaper and push the boom support end until it reaches the stop. Only cover the carbon strut
thinly and use a larger amount of glue for the hole of the support end. Immediately wipe off leaking superglue.
After the glue has dried the two ball links 0807 are attached up to approx. 1mm before the carbon boom and aligned such
that the eye is parallel to the hole of the boom support end 0805.
Attention !
When assembling the attaching balls 0804 you have the possibility to mount them from outside or inside
depending on if you wish to remove the battery later from behind or not. It is recommended to mount the balls from inside
(unlikely as shown in the drawing), because it is not reasonable to pull the battery out to the back. It is logical that the
connecting plugs are located at the front and the canopy can be removed easily to pull out the battery comfortably to the
front. If the balls are located inside, the boom support ends look even more elegantly and aerodynamically. In addition, the
lens head screw 0804a can be tightened more easily from outside (secure with Loctite). Before tightening the struts loosely at
the front of the balls, they should be tightened loosely at the back to the plastic clamp 0809 using the M3x25 screw 0805a
and the nut 0805b. At first press only one strut front side on the ball and then hold the second side loosely on the other ball to
see if both struts have the same length. Correct the length of the second strut by turning in and out the ball link 0807 until it is
suitable and then also press it onto the ball. Look at the helicopter from behind to align the clamp 0809 vertically and tighten
the caphead screw until the gap has disappeared.
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