English: The Gloster Mars I G-EAXZ , the only Mk I. Later renamed Gloster I. Set a British speed record of 196 mph (315 km/h) This December 1921 image shows it with twin Hamblin radiators for its Napier Lion II engine. Late used on floats as J7284 to train Schneider Trophy pilots for the 1925 and 1927 contests.