Comparison of OO OAA/ OBA 'Bass' & 'Squid open models
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| Manufacturer | Hornby | Bachmann Branchline | Rapido Trains UK |
| Year model introduced | 1979 | 2006 | 2023 |
| DCC Capability | Unpowered | Unpowered | Unpowered |
| Bodyshell | |||
| Bodyshells represented (of Prototypes) | |||
| OAA wagon - low ends |
Yes |
No |
Yes |
| OBA wagon - high ends | No |
Yes |
No |
| OBA wagon - low ends | No |
Yes |
No |
| Detailing | |||
| Bodyshell - factory-fitted separate details | |||
| Bodyside doors | No | No |
Yes |
| Door handles | No | No |
Yes |
| Lamp irons | No |
Yes |
Yes |
| Chassis/underframe detail | |||
| Air tank | No | No |
Yes |
| Brake rigging chassis | No |
Yes |
Yes |
| Handbrake wheel/ lever | No | No |
Yes |
| Cab, footplate & interior detail | |||
| Detailed & painted | No | No |
Yes |
| Wheel "aesthetics" | |||
| Chemically-blackened | No | No |
Yes |
| Finescale | No | No |
Yes |
| Nickel-plated | No |
Yes |
No |
| Bufferbeam detail (pre-fitted) | |||
| Cosmetic coupling - hook only | No |
Yes |
Yes |
| Sprung buffers | No | No |
Yes |
| Bufferbeam detail (in detailing pack) | |||
| Pipework (for front) | No | No |
Yes |
| Pipework (for rear) | No | No |
Yes |
| Mechanical | |||
| Body Construction |
Plastic |
Plastic |
Plastic with metal parts |
| Chassis construction | No |
Lightweight |
Plastic & metal |
| Loco-driven wheels (number of) | No | No |
None |
| Minimum radius | No |
Radius 2 |
Radius 2 |
| Coupling socket/mounting | |||
| Fixed |
Yes |
No | No |
| NEM pockets | No |
Yes |
Yes |
| Coupling type |
Tension lock |
Tension lock |
Tension lock |
| Weighting (to assist adhesion) | |||
| Within chassis |
Yes |
Yes |
Yes |
| Separating the body from the chassis |
Body clips off from chassis |
No |
TBC |
| Items in Stock | View | View | View |