Thunderbird 4 is International Rescue's underwater submarine. Piloted by Gordon Tracy and his younger brother Alan, Thunderbird 4 is the ideal underwater scout.
Technical Data[]
Armaments: none
Crew: 2
Engines: 2 Hackenbacker Inchworm engines
Height including rear aquaplanes: 3.7 metres (12 feet)
Length: 8 metres (26 feet)
Maximum diving depth: 11,000 metres (36,090 feet)
Maximum speed (surface): 185 km/h (115 mph)
Maximum speed (underwater): 278 km/h (173 mph)
Power source: hydrogen fuel cell power plant
Weight: 13 tonnes
Width including rear aquaplanes: 5 metres (16.5 feet)
