Assembly of the tail servo
Mount the two tail servo supports 0646 to the tail servo (pull the supports to the outside when tightening the screws in the
play of the sleeves) using the washers 0643a and the M2.5x12 cross-head screws 0643.
The clevis 0636 can also already be mounted at a distance of approx. 10mm to 11mm from the centre of rotation. The
advantage of the clevis is that it can later be reached and opened very easily from the side using a screw-driver to remove
the tail boom with the push rod. If there is a ball head at this position, this would not be possible. The safety is not
endangered. The forces at the tail servo are relatively weak and during numerous test flights the system has proved its worth.
Push the servo between the frame plates of the chassis as shown in the right image and tighten the supports 0646 in the
elongated hole (use Loctite) using the washers 0646b and the M3x10 screws 0646a. Look at the mechanics from behind and
mount the servo at a height so that the clevis is positioned in the centre between the sensor support and the rear tail boom
holder (a bit more close to the holder). Tighten the two screws well.
Push rod for the tail rotor control
De-grease the threaded rods 0633 and glue them into the carbon push rod 0631 on both sides using superglue.
It should protrude by approx. 10 mm from the push rod.
Make sure that the extending thread may not be covered with glue.
Slide on the three approx. 50mm long shrinking tube 0635 up to the carbon push rod and shrink it such that it is located
210mm before the rear end of the rod and a second one 590mm before the rear end of the rod.
!
Cut the third shrinking tube in two equal pieces and shrunk them such that they are located at the ends of the carbon push
rod.
The glue has to be dry before attaching the ball link. In order to do so, slightly grease the thread so that the ball link can be
turned more easily or at first tighten the link to a different M2.5 threaded rod and then untighten it to widen the holes a bit.
The ball link is tightened such that there is still a gap of approx. 1mm between the link and the carbon push rod.
Do not hold on to the carbon push rod with pliers or a similar tool. It is not very resistant to pressure.
The push rod will be assembled later after the tail boom with the tail gear box has been assembled to the mechanics by
pushing it through the guiding hole of the strut clamp 0809 and 0808 from behind and screwing it into the clevis 0636
mounted to the tail servo.
The two 50mm shrinking tubes 0635 has to be slightly greased from time to time to prevent the push rod from sticking.
22
