Compare O Class 121 'Bubble Car'
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| Manufacturer | Dapol | Heljan |
| Year model introduced | 2022 | 2024 |
| DCC Capability | DCC Ready. 21-pin socket | DCC Ready. 21-pin socket |
| Detailing | ||
| Bodyshell - factory-fitted separate details | ||
| Door handles |
Yes |
No |
| Exhausts |
Yes |
No |
| Handrails |
Yes |
No |
| Lamp irons |
Yes |
No |
| Chassis/underframe detail | ||
| Battery box |
Yes |
No |
| Engine |
Yes |
No |
| Engine pipework |
Yes |
No |
| Footsteps |
Yes |
No |
| Fuel tank |
Yes |
No |
| Cab, footplate & interior detail | ||
| Detailed & painted |
Yes |
No |
| Glazing |
Yes |
No |
| Seating |
Yes |
No |
| Window wipers |
Yes |
No |
| Bufferbeam detail (pre-fitted) | ||
| Pipework - pre-fitted to front |
Yes |
No |
| Pipework - pre-fitted to rear |
Yes |
No |
| Sprung buffers |
Yes |
No |
| Mechanical | ||
| Body Construction |
Plastic with metal parts |
Plastic with metal parts |
| Chassis construction |
Heavy diecast |
Diecast |
| Loco-driven wheels (number of) |
8 wheels |
4 wheels |
| Minimum radius |
6ft |
6ft |
| Coupling socket/mounting | ||
| Screw Link Couplings |
Yes |
No |
| Coupling type |
3-link coupling |
3-link coupling |
| Weighting (to assist adhesion) | ||
| Within chassis |
Yes |
No |
| Separating the body from the chassis |
Body clips off from chassis |
Body clips off from chassis |
| Electrical | ||
| Motor type |
2 x 5-pole with flywheel |
5-pole with flywheel |
| Motor location |
1 mounted on each bogie |
Centre of chassis |
| Power collection |
2 rail DC |
2 rail DC |
| Working lights | ||
| Cab light |
Yes |
No |
| Directional headlights & tail lights |
Yes |
No |
| Headlights (independent) |
Yes |
No |
| Interior lighting |
Yes |
No |
| Tail lights (independent) |
Yes |
No |
| Pickups |
All wheels |
All wheels |
| DCC speaker |
Provision for a speaker (dimensions unknown) |
Provision for a speaker (dimensions unknown) |
| Items in Stock | View | View |