WORTLEY TOP FORGE MODEL ENGINEERS
SKIMBLESHANKS - A Battery
powered dock shunter
By Peter Stokes
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I had been considering building a loco for a long time. Other members
at Wortley kept asking me when I was going to start and I also needed a
legitimate excuse to escape into the workshop/garage. After all my two
youngsters, Daniel and Eleanor, needed a train! I saw an 0-4-0 battery powered
diesel shunter on display at the Model Engineering Exhibition at Harrogate in
the spring and it looked a suitable challenge. According to the information on
the leaflet, this loco is straight forward to build and suitable for the
less experienced modeller or alternatively as a quick build for the more
experienced. Im not to sure which category I fitted in to but after
a very brief discussion, the plans were soon in the post and the project was
underway.
The actual building of the loco took about 5 weeks to
complete and was straight forward apart from one or two (actually ten) mistakes
on the plans. A great deal of midnight oil was burnt whilst the loco took
shape. Dad, is it nearly finished? and Youre not going
into the workshop again, are you? was a nightly ritual I had to bear. The
hardest part was casting the aluminium radiator as the pattern was reluctant to
come away from the sand. With a little gentle persuasion an acceptable
casting was realised. The machining of the wheels was subcontracted out to a
fellow member of the society. The inaugural run was arranged for a Tuesday
evening early in June. The loco was coupled up to a passenger truck and the
batteries were connected up. Without a hitch the loco surged forth pulling the
builder and his family. After a couple of circuits of the Wortley track, the
loco was proceeding alongside the river just after Heron Bank when one of the
front axle box retaining
bolts sheared and the axle box dropped off!!
What a stupid design having the axle boxes on the outside of the main
frame some passing tracklayer was heard to say. A new retaining bolt was
fitted solving the problem and the loco was soon back on the rails.
A
driving truck was urgently required to carry the second battery. Whilst the
driving truck was being built, the loco was stripped down, cleaned and painted.
At the same time all the axle box retaining bolts were carefully given the
Loctite treatment! The driving truck design was based on a cross between an
existing Wortley box truck and the passenger truck. The suspension caused the
most headaches as it proved difficult to find suitable compression springs
capable of being soft enough to carry Daniel and Eleanor and also capable of
supporting two adults. Eventually after a number of trials a compromise was
reached which enables the truck not to derail on the Wortley track. The driving
truck was completed in July. During September a Sigma Sport cycle speedometer
was fitted to record the speed and the mileage. Up to the end of 1998,
Skimbleshanks has successfully completed some 38 miles on the third of a mile
track at Wortley. Both children and Ann appear to enjoy driving Skimbleshanks.
The Stokes family are well chuffed (electrified?) with
Skimbleshanks.

Why on earth
is it called Skimbleshanks? you might well ask. Cats the well
known
T.S.Eliot/Andrew Lloyd Webber musical has fond memories for both of
us. Our house was an ex-police house so we decided to call it Macavitys,
after the criminal cat and guess what....... Skimbleshanks was the railway cat!
After all the locos almost purrfect!
Loco
specification
7.25 gauge
0-4-0 dock shunter
Length 35
Width 13
Height
21.5
Drive 3/8 chain, reduction through two
countershafts
to both axles.
Motor 24v, 1 H.P.
l00amp Parkside Electronics hand held
electronic controller with forward, reverse and
dynamic braking. The
controller is protected on the battery input with a 63amp circuit breaker
mounted in the cab. Two 90 amp, deep-cycle leisure batteries, one mounted in
the loco and the other in the driving truck.
12v two-tone horns
12v
headlamp
Maximum speed approx. 5 mph
Driving truck to carry two
passengers
Length 42
Width 16
Height 21
Handbrake working on 4 brake shoes on
the front wheels.