The loco is driven on one bogie via a full hydraulic system (not to be confused with hydrostatic), powered by a diesel 'Power-pack'. Hydraulic disc brakes provide stopping power
| Name | Mardyke Hymek 'Arctic Fox' |
| Number | IA20 |
| Type | |
| Wheelbase | |
| Length | ......inches |
| Builder | |
| Year built | |
| Cylinders | |
| Valve gear | |
| Lubrication | |
| Boiler material | |
| Boiler ID | Unknown |
| Livery |
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Gauge: 10 1/4"
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