What We Do
Mk7 Ejection Seat
An evolution of the Mk5 ejection seat.
MK7
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/speed | Zero/zero |
| Crew boarding mass range | 7A, 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 range | A – 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 ejection | 600+ KIAS |
| Parachute type | Irvin I 24 |
| Parachute deployment | Drogue assisted |
| Harness type | Combined |
| Ejection seat operation type | Ejection 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 unit | Yes, with g-restrictor |
| Manual override handle | Yes |
| Guillotine | Yes |
| Timers | Time delays for command ejection, Time-release unit for man/seat separation |
| Seat adjustment | Up/down, manual operation |
| Arm restraints | No |
| Leg restraints | Yes, two garters |
| Oxygen supply | Bottled oxygen |
| Personal survival pack | Yes, with liferaft |
| Aircrew services | Personal 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 ejection | Optional |
