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Composite-ARF YAK 55SP (3m span)
Fit the wheelpants to the legs as follows: Set
the fuselage on a level surface with the tail-
wheel (optional tailwheel assembly available
from C-ARF) in place.
Drill a 6mm Ø hole centrally right thru' the
rounded part of the wheelpant. Fit the wheel-
pants over the M6 x 70mm axle bolts, and
also temporarily fit the wheels, and screw the
bolts into the threaded inserts that are mould-
ed into the legs during manufacture.
Looking from the side view, adjust the angle of
the wheel pants so that the tops of both are parallel with
each other, and the bottom edges angle upwards a little, as
shown in the photo below. When satisfied with the angle,
temporarily tack the wheelpants to the carbon landing gear
legs with a small drop of thin CA. Remove the wheels and
axle bolts very carefully, and then secure the wheelpants to
the legs with 2 small sheet-metal screws (2.2 x 10mm), into
1.8mm Ø holes drilled into the ends of the carbon legs.
You can use any 5" main wheels of your choice. Kavan
wheels are very lightweight, but not very durable on asphalt
runways, and Dubro wheels are a little heavier but much
more solid, and this is what we use at C-ARF.
The order of the items on the axle bolt is: Bolthead, wash-
er, wheel hub, 2 or 3 washers, M6 nut (with Loctite), wash-
er, fibreglass wheelpant, carbon landing gear leg. You may
need to adjust the number of washers, or even add a 6mm
wheel collar behind the wheel to maintain free wheel move-
ment and centre the wheel against the wheelpant, depend-
ing on the actual wheels used. A drop of loctite on the M6
axle bolt where it goes into the threaded insert in the leg is
good insurance.
techsupport@composite-arf.com
(above) The carbon legs are
secured using the M6 x 20mm bolts
and large washers.
(below) Wheel axles are M6 x
70mm bolts, which fit into the
threaded inserts in the moulded
carbon legs. The supplied washers
are used as spacers, with a plain
nut against the outer plywood face
of the wheelpant.
(left/below) Completed wheelpant
with 5" Dubro wheels. The angle of
the wheelpants to the legs is set
with 2 small sheetmetal screws,
thru' the wheelpant into the car-
bon leg.
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