Comparison of O Class 33 models
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| Manufacturer | Lima | Heljan |
| Year model introduced | 1977 | 2011 |
| DCC Capability | DCC incompatible | DCC compatible but no socket |
| Bodyshell | ||
| Bodyshells represented (of Prototypes) | ||
| Class 33/0 - as built |
Yes |
Yes |
| Detailing | ||
| Bodyshell - factory-fitted separate details | ||
| Door handles | No |
Yes |
| Fan Grill (etched) | No |
Yes |
| Fan(s) | No |
Yes |
| Handrails | No |
Yes |
| High intensity headlight | No |
Yes |
| Lamp irons | No |
Yes |
| Nameplates - etched - require fitting | No |
Yes |
| NRN (National Radio Network) Pod | No |
Yes |
| Side grilles (etched) | No |
Yes |
| Chassis/underframe detail | ||
| Battery box |
Yes |
Yes |
| Footsteps | No |
Yes |
| Fuel tank |
Yes |
Yes |
| Pipework | No |
Yes |
| Sanding gear | No |
Yes |
| Speedometer cable | No |
Yes |
| Cab, footplate & interior detail | ||
| Detailed & painted | No |
Yes |
| Glazing |
Yes |
Yes |
| Seating | No |
Yes |
| Window wipers | No |
Yes |
| Wheel "aesthetics" | ||
| Chemically-blackened | No |
Yes |
| Finescale | No |
Yes |
| Nickel-plated |
Yes |
No |
| Painted |
Yes |
No |
| Bufferbeam detail (pre-fitted) | ||
| Electric train heating box/ pipes | No |
Yes |
| Lifeguard | No |
Yes |
| Multiple working sockets/ pipes | No |
Yes |
| Pipework - pre-fitted to front | No |
Yes |
| Pipework - pre-fitted to rear | No |
Yes |
| Sprung buffers | No |
Yes |
| Bufferbeam detail (in detailing pack) | ||
| Snow plough | No |
Yes |
| Detail pack also contains... | ||
| Alternative headcodes | No |
Yes |
| Mechanical | ||
| Body Construction |
Plastic |
Plastic with metal parts |
| Working cosmetic features | ||
| Rotating fan(s) | No |
Yes |
| Chassis construction |
Plastic & metal |
Heavy diecast |
| Loco-driven wheels (number of) |
4 wheels |
8 wheels |
| Minimum radius |
4ft |
Radius 2 |
| Coupling socket/mounting | ||
| Fixed |
Yes |
No |
| Screw Link Couplings | No |
Yes |
| Coupling type |
Hornby Dublo/ Peco "Simplex" coupling |
3-link coupling |
| Weighting (to assist adhesion) | ||
| Within chassis |
Yes |
Yes |
| Separating the body from the chassis |
Simple to do, without damaging any loco parts |
Secured with one or more screws |
| Electrical | ||
| Motor type |
Pancake |
2 x 5-pole with flywheel |
| Motor location |
1 bogie mounted |
1 mounted on each bogie |
| Power collection |
2 rail DC |
2 rail DC |
| Working lights | ||
| Directional headlights & tail lights | No |
Yes |
| Illuminated headcodes | No |
Yes |
| Pickups |
Power bogie only |
All wheels |
| DCC speaker |
No provision for speaker |
Provision for a speaker (dimensions unknown) |
| Items in Stock | View | View |