Carf-Models CL-41 Tutor, Руководство пользователя

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Composite ARF Tutor T-114 manual – techsupport@composite-arf.com
20
Fuselage Assembly
The fuselage is a large item to handle during
construction, we recommend that you leave the
front screen windows in position until the nose
doors are hinged to lessen the chance of damage
while the fuselage is inverted.
We recommend you coat the pre installed
wood work with a coat of wing skinning epoxy
thinned with methylated spirit, this seals the
wood parts from water or fuel absorption. The
radio installation plate and nose area battery
cover plates should also be coated in several
thin coats of wing skinning epoxy, sanded
between. These can then be painted to give
a professional finish. Painting the fuselage
inside with a light grey paint also adds to the
quality look.
Note
On the prototype aeroplanes there is a small
amount of fuselage flex caused by the high
tail and leverage, this has not been an issue
in the extensive flying program, but some
addition carbon tows can be added around
the former position-take these down around
the fuselage sides to the four o’clock and
eight o’clock positions.
Now is a good time to make cut-outs for the
wing services. This should be in the D box
area of the wing seat area on either side of
the fuselage.
Mount your chosen nose steering servo in the
cradle attached to the nose leg and connect to
the steering ball using an M3 all thread pushrod.
Ensure you centre the servo before installation
and fit with a 14mm radius servo arm. If you
use the same make of servo on the rudder no
reversing is required and the two steering servos
can share a channel.
Start by installing the nose unit and nose gear
doors, which are moulded to match the fuselage
double curvature. The curved nature of the
nose and doors make installing more than three
hinges on each door difficult. The doors operate
reliably with three hinges on each door and
the forward section braced with a plywood rib
bonded to the door.
The CARF recommended gear will match the
holes factory drilled in the nose former, so
no further work is needed before you can add
four M4 T nuts with some epoxy. Pull them
fully home with an M4 Allen Screw and a load
spreading washer.
Before the hinges can be installed the remaining
lip around the gear door opening needs
trimming so that only 3mm remains at the nose,
this is for wheel clearance. Where each of the
off-set door hinges mount (there are cut-outs
in the nose structure) the lip needs reducing to
1-2mm from the recessed edge. Roughen the
hinge pads with course glass paper and using a
small flat file, clean up the fuselage area where
the hinges mount.
Tack glue three hinges in position each side,
so that the pivoting door section is at ninety
degrees to the fuselage, with the open section
against the fuselage shell. Access to the hinges
is also possible though the nose hatch opening.
When you are satisfied with the hinge position,
roughen the gear door where the hinges fix
and apply a small amount of thick CA to each
hinge pad, then tape the gear doors accurately in
position and either flip the fuselage over to drop
the hinges onto the doors or manually press
each in position, working one side at a time. Set
with a blast of CA activator, before carefully un
taping the doors and checking their operation.
When satisfied with the position and operation,
permanently fix the hinges with epoxy beads
around the hinge pad sections.
The nose door rams supplied by CARF in the
installation kit (250550) are Robart #165 1"
stroke units, less stroke than this is required.
Adding a wheel collar to the ram rod before
installation allows a mechanical stop to be
added. Cut two ram support plates from