Mk7 Ejection Seat

An evolution of the Mk5 ejection seat.


Over 1,900 lives saved

Currently over 150 seats in service.

The introduction of the rocket pack to the range of Mk4 and Mk5 seats created the basic Mk6 and Mk7 ranges respectively. However, many of the Mk7 range of seats were subsequently embodied with additional improvements in design such as Power Retraction Systems, Remote Fired Rocket Systems and Sequencing Systems as later described.

The Mk7 ejection seat is still in service today in the F-4 Phantom

The seat is operated by the following countries: Greece, South Korea and Turkey. To date, there have been over 1,900 lives saved using the Mk7 seat.

Aircraft fitted: Phantom, F-104, Vought F-8, EWR VJ 101C, Lockheed F104G / TF104G, Prowler, F-5, F-4, F-14, Grumman Cougar, Crusader, Grumman X-29
Operating ceiling 50000+ ft (15,250m)
Minimum height/speedZero/zero
Crew boarding mass range7A, F-4 US Phantom – 70.8 to 120.6kg; Q7A, F5 – 65.5 to 110.0kg; GRUEA7, Prowler – 71.7 to 114.8kg; 7A F-4 RAF Phantom – 72.6 to 111.1kg; Q7, F104 Starfighter – 68.5 to 107.5kg; H7 – 73.6 to 112.2 kg
Crew size rangeA – 3rd to 98th percentile; Q7A – 3rd to 98th percentile; GRUEA7 – 5th to 95th percentile; 7A – 5th to 95th percentile; Q7 – 5th to 95th percentile; H7 – 5th to 95th percentile
Maximum Speed for ejection600+ KIAS
Parachute typeIrvin I 24
Parachute deploymentDrogue assisted
Harness typeCombined
Ejection seat operation typeEjection gun and multi-tube rocket pack
Ejection gun 80 ft/sec; One primary cartridge, two secondary, cartridges, 72 in. stroke Ejection initiation: Face screen or seat pan firing handle
Barostatic time-release unitYes, with g-restrictor
Manual override handleYes
TimersTime delays for command ejection, Time-release unit for man/seat separation
Seat adjustment Up/down, manual operation
Arm restraintsNo
Leg restraintsYes, two garters
Oxygen supplyBottled oxygen
Personal survival packYes, with liferaft
Aircrew servicesPersonal equipment connector (PEC) provides connections for main oxygen, emergency oxygen, air-ventilated suit, anti-g suit and mic/tel
Canopy jettison Yes, aircraft variant dependent
Command ejectionOptional

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