Table of Contents
Advertisement
Composite-ARF Yak-55 SP (2.6m span)
these photos is an optional part available from C-ARF, and
is mounted with 4 sheet metal screws and 2 plastic 'U'
brackets under the fuselage, screwed into the plywood
reinforcement installed in the fuselage at the factory.
You do not need to make the tailwheel steerable, a simple
castoring action is fine. However, for asphalt runways you
may prefer to connect it to the rudder horn with 2 springs as
shown. It's easy to make these by winding some 0.8mm or
1.0mm Ø piano wire around a 5mm drill bit, turned slowly in
a battery-drill, with a small hook in each end to connect to
the tailwheel steering arms and the rudder horn.
Remember - keep it lightweight at the tail end!
Cowling and Grilles
Attaching the 1 piece cowling is quite easy, as it is already
cut and trimmed at the factory, and should need almost no
adjustment for a perfect fit. With the fuselage set on it's
main undercarriage legs, on a level table, trial fit the
cowling on the fuselage, checking that the moulded lip on
the cowl sits properly into the groove moulded into the front
edge of the fuselage. If necessary, sand the inside back
edge of the cowl slightly, and the moulded-in groove in the
fuselage, to get a perfectly flush fit.
Mark a centreline on the top of the cowl and the fuselage,
on small pieces of masking tape. File a small slot in the top
centre of the fuselage lip, as shown here, to take the loca-
tion tab on the milled plywood part that will be glued inside
the cowling to locate it. Tape the cowling firmly in place on
the fuselage, and glued the milled plywood tab onto the
inside of the cowl with 30 minute epoxy and milled fibre. Be
careful not to glue the cowling on permanently! This tab
makes it easy to locate the cowling, so that the bolts in the
bottom line up with the securing M3 blind nuts etc.
techsupport@composite-arf.com
(above) The completed wheel
pant and wheel (5" Dubro shown)
(below) Optional tailwheel assem-
bly from Composite-ARF. It is simply
fixed to the bottom of the fuselage
with the clamps supplied, and 4
small screws into the plywood
plate that is installed at the factory.
Finished in 2 hours
(above) Milled plywood tab glued
to inside of cowling to locate it
(above) A small notch must be
filed in the front lip of the fuselage
to take the milled plywood tab.
14
Advertisement
Table of Contents
