Japan urges U.S. to ground Ospreys Japan has asked the U.S. military to suspend all non-emergency V-22 Osprey flights over its territory, after one of the jets operated by the U.S. Air Force was involved in a fatal crash Nov 29: U.S. Osprey crashes off Yakushima Island, killing at least one of eight crew members JAPAN Okinawa V-22 OSPREY: Tiltrotor aircraft combines vertical lift of helicopter with speed and range of fixed-wing airplane Engines Wingtip- mounted nacelles turn through 90 ̊. Cross-connected transmissions allow either engine to power both rotors if one engine fails In-flight refuelling probe Crew Three, in high-visibility cockpit with night vision displays Wings: Fold for compact storage aboard ship Capacity: 24 troops or 9,000kg of internal cargo, three times payload of helicopter Loading ramp Troops exit from rear of cargo bay, away from 80 knot rotor downdraft Rotors 11.6m diameter, rotate in opposite directions so tail rotor not required for stability as on helicopter First flight 1989 Length 17.5m Width (with rotors) 25.8m Maximum speed Forward flight 565km/h Vertical flight 185km/h Range (24 troops) 1,100km Altitude 7,925m Osprey has suffered string of fatal crashes over years Vertical flight Can take off, land and hover like a helicopter Forward flight Twice the speed, four times the range of helicopter. Conversion takes just 12 seconds Sources: U.S. Department of Defense, Boeing © GRAPHIC NEWS