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gptkbp:instance_of
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gptkb:archaeological_site
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gptkbp:activities
|
pyrotechnic cartridge
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|
gptkbp:associated_with
|
various military aircraft models
|
|
gptkbp:color
|
olive drab
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gptkbp:controls
|
manual and automatic
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gptkbp:country
|
used by several countries' air forces
|
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gptkbp:deployment
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up to 600 knots
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gptkbp:developer
|
gptkb:Martin-Baker_Company
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gptkbp:dimensions
|
1.2m x 0.5m x 1.5m
|
|
gptkbp:elevation
|
up to 50,000 feet
effective at low altitudes
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|
gptkbp:features
|
automatic deployment system
ergonomic design for pilot comfort
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|
gptkbp:feedback
|
positive user feedback
|
|
gptkbp:first_flight
|
gptkb:1965
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gptkbp:height
|
1.2 meters
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|
gptkbp:historical_context
|
developed during Cold War era
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gptkbp:historical_significance
|
important in aviation safety history
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Martin-Baker Mk. 21 J
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gptkbp:impact
|
high impact resistance
|
|
gptkbp:influenced
|
subsequent ejection seat designs
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|
gptkbp:influenced_by
|
gptkb:Martin-Baker_Mk._16
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|
gptkbp:introduced
|
1960s
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|
gptkbp:invention
|
patented design
|
|
gptkbp:is_designed_for
|
gptkb:aircraft
|
|
gptkbp:is_tested_for
|
extensively tested in simulations
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|
gptkbp:is_used_by
|
gptkb:military_base
|
|
gptkbp:legacy
|
widely regarded as reliable
|
|
gptkbp:manufacturer
|
gptkb:Martin-Baker
|
|
gptkbp:max_takeoff_weight
|
automatic parachute deployment
rocket-assisted ejection
up to 300 mph
automated ejection sequence
|
|
gptkbp:modifications
|
various modifications over the years
|
|
gptkbp:notable_event
|
few notable incidents reported
|
|
gptkbp:notable_users
|
gptkb:British_Army_Air_Corps
|
|
gptkbp:production_years
|
1965-1990
|
|
gptkbp:related_to
|
gptkb:Martin-Baker_Mk._10
|
|
gptkbp:replaced_by
|
gptkb:Martin-Baker_Mk._20
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|
gptkbp:safety_features
|
high
dual parachute system
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gptkbp:seating_capacity
|
zero-zero seat
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gptkbp:specifies
|
detailed technical specifications available.
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gptkbp:status
|
retired from active service
|
|
gptkbp:successor
|
gptkb:Martin-Baker_Mk._22
|
|
gptkbp:training
|
used in military training exercises
used in pilot training programs
|
|
gptkbp:type
|
catapult seat
|
|
gptkbp:used_in
|
1990s
|
|
gptkbp:weight
|
approximately 100 kg
up to 120 kg pilot weight
|
|
gptkbp:width
|
0.5 meters
|
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gptkbp:bfsParent
|
gptkb:Martin-Baker_Mk._21
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gptkbp:bfsLayer
|
7
|