Preparation
The mouldings are of reasonable quality but may need cleaning up in a couple of
places. The fuselage had a ridge around the centre line where the two halves had
been joined. Not significant but I gently removed it with a fine file anyway.
The wings had “flashing” along the leading edge from the moulding process which, I
believe, is more significant. I removed this with a fine file also.
I could see that as the fuselage has been constructed for toughness rather than
minimum weight it will be necessary to mount all the equipment as far forwards as
possible to obtain the required centre of gravity position.
I decided to build the model in the following order – Wings, V tail then fuselage. This
would allow me to check the CoG at various stages and fine tune the fuselage
installation as I went along.
Wings
For wing servos I decide to use Hitec 5065s as already had three. In the past I have
attached them by wrapping masking tape around the servo and epoxying them
directly to the wing upper surface. However, I have found that the servo occasionally
wriggles loose in the tape so I tried a new (for me) technique with this model.
I bought some CNC cut plywood mounting plates which are designed for the 5065
and are close fit around the servo. These are epoxied to the wing upper surface and
the servo is pushed into the mount and secured with a couple of spots of hot melt
adhesive. They made setting up the controls much easier as the servo can be
removed as often as needed before being finally glued in place.
The 5065s are 12mm thick and they only just fit into the aileron bay with literally no
thickness to spare. This is the maximum thickness for the servo and assumes no
addition thickness due to mounting the servo in the wing. There is more thickness
available in the flap bays.
1. Servo mounts
a. Remove about 1mm from the servo mount width so that it is a snug fit
between the wing ribs and slides up against the rear of the main spar.
The servos are all fitted with the horn facing a way from the fuselage.
b. Wrap the servo with a single layer of cling film to prevent the servo
being bonded to the mount or wing.
c. Place the mount on a flat surface and press the servo home until the
servo and mount are flush on the underside.
HyperFlight Sky Series Assembly Guide
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