PART 1 - DESCRIPTIVE
alternative firing handle, the pilot must first press
his head firmly against the headrest to prevent
dislocation of the neck on ejection.
(v) All leads incorporate quick releases which are auto-
matically broken on ejection.
(vi) After ejection, at heights of 10,000 ft. and below, a
barostat causes an automatic cycle to commence.
After three seconds the safety harness is released, as
are the face screen, firing handle and headrest pad.
An apron attached to the seat drogue then pitches
the pilot head first out of the seat, at the same time
opening his parachute.
(vii) A manual override D-ring is fitted over the rip-cord
D-ring and should be operated to isolate the auto-
matic device if the system has failed.
(b) Leg restraining cords
(i) When Martin Baker Mod. 272 is embodied on the
Mk. 2H seat leg restraining cords are fitted in lieu of
footrests. The thigh guards are retained.
(ii) The leg restraining cords ensure that the occupant's
legs are drawn back automatically and restrained
close to the seat pan during ejection, thus providing
leg clearance and preventing the legs being blown
apart after ejection. The cords should be fitted as
follows:-
1. Secure the leg straps below the knees with the
D-rings to the rear.
2. Pass the left nylon cord through the right leg
D-ring under the safety harness lap straps and
insert the right shoulder harness eye-piece
through the loop on the cord. Secure the shoulder
harness in the quick release box.
3. Repeat for the other cord, passing the right cord
through the left-leg D-ring and attach the loop
to the left shoulder harness. Secure the harness.
The restraining cords are fastened to the floor in
brackets, the rivets of which shear at 400 lb. force.
The cords pass through snubbing units at the front
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