| 7 1/4" Gauge Battery Locomotive |
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Dimensions
- Wheel size 127mm (cut
from 5" dia blank) EN8 steel
- 1" diameter axles
- Length 2100 mm (7 feet)
- Width 600 mm (24")
- Minimum radius - 15
feet
(4.5m)
Optional
Extras
- Quick release battery connectors
- Diesel engine sound unit
- Speedo
- Second set of batteries + associated wiring
- Parking brake
- Sprung buffers
- Driver doll in cab
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Technical
- 8 x 150w motors
- Direct drive - instant power and braking
- 24v iDrive digital controller - 180 amp continuous
rating
- Progressive regenerative braking
- Brass drivers controls
- Top speed 11-12mph
- Body 1.2mm steel cab
- Rear body 18mm birch plywood
- Commercial bearings
- Direct drive from axle hung motors
- Vacuum pump and control for braking
- 2 x 85amp hour batteries
- Hi Lo horn
- Induction ammeter - power drawn + shows regenerative
braking
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Loosely
based on the Romney Hythe and Dymchurch Railway's "Captain Howey"
locomotive, the first 7 1/4" gauge locomotive was built in our workshop
as part of a working party for the Chingford Model Engineering
Club. The club kindly allowed the locomotive to visit other
railways and even the London and Harrogate Model Engineering Shows in
2012.
Not
only does the loco perform on its duties at Chingford but the third one
to be built works commercial trains at Poplar Miniature Railway in
Marks Tey.
This loco is ideal for around 12 passengers (2-3 coaches) on medium to heavy duty run.
The direct drive means virtually no slack in the drive system so the
response between acceleration and braking is nearly instantaneous. The
twinning of motors on axles means reduced tooth loading of the gears.
The iDrive digital controller offers 24 v pulse width modulation
with a continuous rating of 180amps - a proper commercial controller
which is one of the most robust on the market.
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Copyright
Ride on Railways Ltd
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