Rear entry hatch with air intakes and filters

Bench seating situated over side caterpillar housings

Side caterpillar sprocket drive

Gearing

Motor

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