Mole cutaway drawing
Rear entry hatch with air intakes and filters
Bench seating situated over side caterpillar housings
Side caterpillar sprocket drive
Driver's seat; does not tilt to counter vehicle
change of direction as in Thunderbird 1 and 3
where acceleration stresses are much higher
Instrument and computer bay
Air recycling gear
Nuclear reactor producing direct electric current
Drive sprocket rings turn the extremely hard 'bit'
Drive sprocket rings turn the extremely hard 'bit'
Annular bearing rings
Annular bearing rings
Electric motor drives sprocket rings
Fore and aft gearboxes
Acoustic detector and drill temperature sensors
Trolley which carries the Mole to the disaster site (see inset for
tilting manoeuvre on arrival); powered by 1000 b.h.p. high compression
engine using a form of rocket propellant with air as oxydant – if
air is absent due to water level or explosive gases, liquid oxygen
is used instead; this is carried in cylindrical tanks alongside
Wide angle TV cameras enable driver to position for drilling
Instruments recording pressure, temperature, &c.
Acoustic detector (the operator stops the bit
while it is in contact with rock through which
sounds made by the victim are travelling)
Trolley control
TV external viewer with infrared below
Artificial horizons with sonar
and neutron radar below and
drill performance indicators
Reactor instruments
Motor and auxiliary gauges
Driver's seat with the back removed

Technical specifications published originally in Thunderbirds 1967 Annual

Technical Specifications
name: Mole
description: Thirty tons of burrowing, tearing might, powered by a nuclear reactor – that's the Mole, the amazing drilling machine invented by Brains. The Mole has brought succes to many rescue operations where trapped disaster victims would have perished if it had not been for this machine.
A tracked trolley carries the machine to the drill site where it is tilted for vertical drilling with its Formula C30/1 drill bit which can cut through any known metal. Caterpillar tracks on its side allow for its return to the surface when the rescue is complete.
designer: Derek Meddings