As an aid to deciding which mechanism to use for Marbelup Models DB Locomotive, the following summarises the main features of the Hollywood Foundry (HF) and ViTrains (VT) mechanisms.
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| Comparison of ViTrains bogie (left) and Hollywood Foundry bogie (right) |
Bogie Wheelbase
Prototype: 3810 mm = 59.5 mm in S scale
HF Bogie: 59.5 mm
VT Bogie: 58 mm
Wheel Diameter
Prototype: 1016 mm = 15.875 mm in S scale
HF Bogie: 15.7 mm
VT Bogie: 14.8 mm Note: Upper part of wheels is largely hidden by bogie sideframes
Flange Depth
HF Bogie: 0.65 mm (RP25)
VT Bogie: 1 mm - operates on Code 70 or larger rail
Cost (for drive bogies and motor):
HF Single Bogie Drive: Approx. $200
HF Double Bogie Drive: Approx. $250
VT Drive: $140
HF Mechanism Features
- Choice of 6-wheel (single bogie) or 12-wheel (dual bogie) drive
- For single bogie drive, cab area is clear to allow for interior detailing
- Worm gear on each driven axle, with dual belt drive from bogie input shaft
VT Mechanism Features
- 8-wheel drive (centre axles are idlers and lightly sprung)
- Twin flywheels included
- Smoother operation
- Quieter operation
- Cab area is clear to allow for interior detailing
- Worm gear on each bogie with spur gearing to powered axles
