The Martin-Baker Mk.11 seat embodies all the design features of the Company’s more sophisticated escape systems but at reduced weight and size. The Mk.11 seat design offers a great deal of flexibility allowing each installation to be tailored specifically to an individual customer’s requirements. The Mk.11 seat is fitted in the Pilatus PC9 trainer and Promavia Jet Squalus.
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Specifications
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Mk 11 (SA11A)
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Operating ceiling
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40 000 ft (12,192 m)
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Minimum height/speed
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Zero/60 KIAS in near level attitude
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Crew boarding mass range
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60 to 126.7 kg
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Crew size range
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Specific crew size range
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Maximum Speed for ejection
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400 KIAS
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Parachute type
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GQ Type 1000 Mk2
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Parachute deployment
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Drogue assisted
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Drogue parachute type
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Yes
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Drogue deployment
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Fired by cartridge generated gas
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Initiated by trip rod
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Harness type
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Combined
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Ejection seat operation type
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Ejection gun
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Ejection gun
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Single
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Ejection initiation
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Handle on seat pan initiates gas operated seat
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firing system
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Automatic back-up unit
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No
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Electronic Sequencer
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No
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Barostatic time-release unit
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Fired by cartridge generated gas
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initiated by trip rod
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Timers
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Drogue gun time delay, command delay breech
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Seat adjustment
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Up/down Actuator operated 28 Vdc
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Arm restraints
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Firing handle remains attached to seat pan to
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help prevent flailing
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Leg restraints
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Yes, two garters
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Oxygen supply
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Bottled emergency oxygen
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Connection for main oxygen supply
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Personal survival pack
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Equipped for desert survival, manual deployment
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Aircrew services
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No
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Command ejection
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Yes
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Canopy jettison
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No
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Miniature detonating cord
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No
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Canopy fracturing system
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Canopy breakers
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Interseat sequencing system
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No
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Seat firing handle pulled causing seat initiation cartridge to fire
Command firing initiated (if selected)
Harness retraction unit operated
Primary cartridge fires
Top latches disengage, seat rises up rails, secondary cartridges fire progressively
Canopy breakers shatter canopy
Drogue gun time-delay mechanism initiated by trip rod
Barostatic time-release unit (BTRU) initiated by trip rod
Seat services and command ejection quick-disconnects disconnected
Emergency oxygen supplied to aircrew
Leg restraint lines restrain aircrew’s legs, lower attachments shear
Drogue deploys after delay, to stabilise and decreases velocity of seat
Barostatic time release unit monitors the altitude
Above pre-determined altitude -
- Seat falls, stabilised by drogue
- Emergency oxygen supply continues
Below pre-determined altitude -
- BTRU mechanism operates, cartridge fires
(If BTRU fails manual deployment also available by pulling manual override handle)
- Drogue shackle freed
- Parachute mechanical lock freed
- Upper harness locks released
- Lower harness lock mechanism releases lower harness lugs, negative-g strap and leg restraint lines
- Aircrew momentarily held in seat by sticker straps
Drogue extracts and deploys the main parachute canopy
Main parachute canopy fully deploys and lifts aircrew and personal survival pack (PSP) from seat.
Reaction to sticker clips ensures divergence of aircrew and seat
PSP manually lowered on drop line below aircrew
Normal parachute descent follows
Manual opening of PSP
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Country
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Aircraft
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Seat Designation
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ANGOLA
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PC-9
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CH11A
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AUSTRALIA
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PC-9
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AU11A 1-2
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BULGARIA
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PC-9
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CH11A
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CROATIA
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PC-9
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CH11A
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CYPRUS
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PC-9
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CH11A
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GERMANY
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PC-9
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CH11A
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IRAQ
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PC-9
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IQ11A
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IRELAND
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PC-9
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CH11A
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MALAYSIA
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PC-9
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CH11A
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MYANMAR
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PC-9
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MR11A
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OMAN
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PC-9
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CH11A
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POLAND
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PZL L-130
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PL11B 1-2
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SAUDI ARABIA
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PC-9
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SA11A
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SLOVENIA
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PC-9
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SA11A
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SWITZERLAND
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PC-9
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CH11A 1-2
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THAILAND
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PC-9
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T11A
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