Martin-Baker Mk.21

GPTKB entity

Predicate	Object
gptkbp:instance_of	gptkb:archaeological_site
gptkbp:bfsLayer	5
gptkbp:bfsParent	gptkb:Martin-Baker_Mk.18
gptkbp:aircraft_operated	gptkb:Bristol_Bloodhound gptkb:aircraft gptkb:Lockheed_Martin_F-35_Lightning_II gptkb:military_officer gptkb:Mikoyan-Gurevich_Mi_G-21 gptkb:De_Havilland_Sea_Vixen gptkb:Mc_Donnell_Douglas_Phantom_II gptkb:Handley_Page_Victor gptkb:English_Electric_Lightning gptkb:F-15_Eagle gptkb:F-14_Tomcat gptkb:Vickers_Valiant gptkb:Dassault_Mirage_III gptkb:Gloster_Javelin gptkb:Boeing_787_Dreamliner gptkb:Northrop_F-5 gptkb:Hawker_Hunter gptkb:BAC_Lightning gptkb:star gptkb:Eurofighter_Typhoon
gptkbp:crew	gptkb:musical
gptkbp:deployment	rocket-assisted
gptkbp:design	gptkb:British
gptkbp:elevation	up to 50,000 feet
gptkbp:features	zero-zero capability
gptkbp:first_flight	gptkb:1956
gptkbp:height	1.2 m
gptkbp:historical_significance	widely used in the 1950s and 1960s
https://www.w3.org/2000/01/rdf-schema#label	Martin-Baker Mk.21
gptkbp:influenced_by	earlier Martin-Baker designs
gptkbp:introduced	gptkb:1956
gptkbp:is_used_by	gptkb:military_base
gptkbp:manufacturer	gptkb:Martin-Baker_Aircraft_Company
gptkbp:max_takeoff_weight	up to 300 knots
gptkbp:notable_features	automatic seat separation
gptkbp:operational_area	gptkb:aircraft
gptkbp:related_to	gptkb:Martin-Baker_Mk.10
gptkbp:safety_features	high
gptkbp:successor	gptkb:Martin-Baker_Mk.22
gptkbp:type	gptkb:archaeological_site
gptkbp:weight	approximately 80 kg
gptkbp:width	0.5 m