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Wings
The Tutor features two part wings that plug
into a single 40mm aircraft grade aluminium
tube either side of the fuselage. Two carbon
pegs locate into the fuselage, these are factory
fitted (Photo 1) fixing the incidence. Two M6
x 30 high-tensile steel socket head cap screws
retain the wings. Access to the screws is via the
main gear door aperture. The gear needs putting
down before the screws can be easily installed.
A model stand like the excellent Byron stand is
recommended, though tipping the aeroplane one
wing at a time will allow straight forward fixing
of these screws using a 6mm ball end driver.
The aileron and flap surfaces are separately
moulded items, factory finished with scale
type hinging and ready for installation onto the
wings. Actuating horns are also mounted ready
for installation of the linkages.
Wood/carbon laminated gear mounting plates
are factory installed to accept the CARF-Models
recommended gear. The landing gear openings
are factory cut, but may require a small amount
of trimming to clean up the gear door lip. The
factory hinged inner gear doors are ready to
accept the operating system. The outer doors are
actuated by the undercarriage legs. (Photo 2)
A large cover plate fixed by nine 2.9 x 10 sheet
metal screw, make access to the flap servos and
gear mounts easy.
The aileron servos are screwed into CNC milled
plywood servo mounts that must be bonded to
the servo covers.
The Flap servo mounts are factory installed just
outside of the gear structure. All commonly
used servos will fit the openings in either mount.
If you use the recommended JR servos two
500mm long leads are needed for the aileron
servos and two 320mm leads for the flap servos.
The leads run in the forward D section of the
wing, accessed through the wing spar openings.
Tip-Use the airline tube supplied with the
undercarriage set to aid pulling the servo wires
Composite ARF Tutor T-114 manual – techsupport@composite-arf.com
through. Threading it through from the root, the
natural curve of the tube will feed in to the first
of the lightning holes just along from the flap
servo mount.
Assemble the ailerons servo mounts from the
milled plywood parts provided. Use either thick
CA or epoxy resin.
We strongly recommend JR 8711 servos for the
ailerons. Before fixing the servo frame prepare
the servo with a JR super servo arm to allow
accurate positioning of the servo arm in the pre
cut slot. Use your radio or a known servo tester
to centre the servo arms before installation. JR
servo arms can be rotated 180 degrees to gain
better centring with minimal sub trim use. Tip
there are several moulds for the arms which are
numbered, these have different offsets.
Before bonding the Aileron servo mounts onto
the cover plate, sand the gluing area with course
glass paper to provide a good key. (Photo 3)
Tack glue the frame in place with CA and test
fit the servo to ensure correct positioning. Once
satisfied, reinforce the joint with 30 minute
epoxy or Hysol. Ensure you firmly bond the
frame onto the cover plate, making a left and
right hand plate.
The servo should be mounted with 2.9 x 13mm
sheet metal screws provided (not with the servo
manufacturer supplied items) Some servos
require a small amount of the frame support
gusset trimming to clear the servo wire as it
exits the servo case.
The ailerons are hinged using a 4mm diameter
brass tube slid from the tip end. There are
various methods available to you for fixing
of this tube, the easiest is a small amount of
glue. It is unlikely the aileron will ever need
removing during the life of this aeroplane.
The Aileron linkage is assembled from the
65mm length of M3 all-thread fitted with an M3
steel clevis and M3 nut at one end, plus an M3
Nylon ball link at the other. Fix this between the
5
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