GRAUPNER Skalar, Руководство пользователя

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The front shaft coupling can now be prepared. Note that it must be possible for the coupling to
engage perfectly inside the tail boom without you observing the process or helping with tools -
both of which are impossible. For this reason it is important to ensure that the brass coupling
sleeve 4618.58 is an easy sliding fit over the coupling yoke 4618.57. Remove any rough edges
from the yoke, and reduce its diameter slightly with fine abrasive paper if necessary. Fit the tail
rotor drive shaft, Order No. 4451.19, fully into the coupling sleeve, so that the pre-formed end
rests inside the sleeve. Now fit a grubscrew in the collet 56.0 and slip it onto the tail rotor shaft
behind the sleeve. Push the tail rotor shaft into the coupling yoke as far as it will go, then slide
the sleeve over the yoke in the same way. Position the collet about 1 mm behind the sleeve, and
tighten the grubscrew to fix it to the tail rotor shaft.
7.4 Completing the tail boom
Fit the tail rotor bracket 4475.107 on the rear end of the tail boom, and fit the strut bracket
1292.6 on the boom from the front, as shown in the drawing. Note that the gap (clamp section)
of the strut bracket must be at the bottom, with the integral bored lug on the left-hand side.
7.5 Checking the length of the tail rotor drive shaft
Remove the tail rotor drive shaft from the mechanics, oil it lightly and slip it through the shaft
bushes, rotating it all the while, until the rear end exits the tail end of the boom and can be fitted
into the tail rotor coupling. Slide the shaft in as far as it will go, then pull it back by 1 mm and
temporarily tighten the grubscrews to secure the coupling. (In use the front end of the tail rotor
shaft must have about 1 mm clearance in the coupling yoke, and this is obtained automatically
when the shaft is eventually pushed into the tail rotor coupling as far as it will go.) The tail boom
can now be fitted temporarily into the tail boom bracket 1292.5; push the tail boom fully onto the
bearing holder 4448.14 and secure it by tightening the clamp in the boom bracket. Fit the tail
rotor into the rear end of the tail boom, and rotate the tail rotor drive shaft to ensure that it
engages in the quick-release coupling on the main gearbox at the front end. It should now be
possible to push the tail rotor into the tail boom to the point where it butts up against the bracket,
without the drive shaft fouling the end of the quick-release coupling at the front. If this is not
possible, the tail rotor shaft needs to be shortened; alternatively you can re-position the tail rotor
gearbox bracket 4475.107 slightly further aft. When you are satisfied, remove the tail boom from
the mechanics again.