B.A.E. HAWK
www.carf-models.com
T-nuts.
Some of the T-nuts will require trimming for structure clearance. Before installing the
nuts apply a small amount of grease into the threads to stop glue locking the screws in
position. Apply a small amount of 30 minute epoxy onto the nuts and partially pull into
position using an M4 x 15 cap head screw and a large M4 washer. Do not pull them
fully home to allow final seating with the retract units in position. Working quickly re
install the units and pull the T-nuts fully home by tightening the retract units fully. Allow
the epoxy to fully cure before removing the units.
The steel retract/oleo pins require flats grinding to stop the hardened pins slipping in the
oleo leg. Insert the pin leaving 18mm protruding from the oleo leg and mark the four
grub screw positions to aid grinding the flats. Ensure the flats do not have sharp corners
as these create stress points where the pin can crack.
Use a thread locking compound like loctite to install the four set screws in each leg.
Install the oleo legs back in the retract units and nip the clamp screw just tight enough to
hold the leg in position.
With both legs installed ‘eye ball’ the wheels and use a straight edge held on the
outside edge of the tyre to check alignment.
Aircraft tracking is better with a very slight ‘toe in” on the wheels, but straight wheels
are better than ‘toe out’ which can lead to instability on the ground. Test the wheel
clearance during retraction and check that the main wheels clear the gear doors when
21
Fig 57
Fig 55
Fig 56
Fig 54