Barrett Engineering logo
Manufactures of Gauge 1
Live Steam Locomotive Model kits
and accessories in 10mm scale

Director Mr S.Barrett     Company Reg No. 8391616

G.W.R City of Truro
LOCO SPECIFICATION
 Scale  :-        10mm:1ft

  Length :-       600 mm (24”)

 Weight :-       5.2 Kg (10lb 9oz)

 Fuel   :-         Alcohol  (Methylated spirit) in tender fixed tank supplied by
                       constant level feed system. Needle valve control.

  Burner :-        Wicked, 5 row ‘Toast rack’.

  Boiler  :-         Internally fired, multi flue, superheated. with safety valve.
                      Built from copper and bronze, silver soldered throughout.
                      Tested to 200psi  (13bar). Certified. Max safe working pressure  100psi (6.5bar)

 Controls :-      Regulator, Blower, Water level test valve, Pressure gauge,

 Cylinders  :-    Twin,  1/2” bore x 3.8” stroke ( 12.7mm x 9.5mm)

 Valvegear :-    Slip eccentric, slide valve

 Lubrication :-   Displacement (Rosco) type.

 Water feed :-   Water carried at front of tender which contains hand pump.
                     Axle driven and hand pumps feed boiler via non return clack
                     if bypass control valve is closed.

  General  :-       loco’ & bogie axleboxes individually sprung.  Buffers and coupling
                      hooks sprung.
Complete kit

£2,387


Production :- August 2018
Technical detail.

Select technical detail to view a description of our steam kit design.

BACK.
        City of Truro was built in 1903 as one of a new class of 10 express locos named after Cities in the GWR region. In common with many locomotives of the era, its design and livery reflected the elegance of that period. It’s main claim to fame is that it was the first machine to propel people at more than 100mph during a legendary dash down a Devon hillside in 1904 . It is part of the National Collection and currently ‘on tour’ visiting many preservation lines whilst in working condition.

THE MODEL
        This model was first produced by us in 1985 as one of our range of ready to run live steam locos. To aid our production we utilised laser cutting to profile our steel components, photo etching to prepare all the sheet brass work, investment ( lost wax) castings for some components and whitemetal detail castings where appropriate.
In recent years we have invested in computers to aid design and  production. We produce our own photoetching tooling to a  much higher degree of accuracy than can be achieved by hand draughting or photographic enlargement from smaller scales. A well equipped machine shop give us the capacity to provide accurately machined components. To help in the quest for consistent quality we now produce our own whitemetal castings and the waxes for the investment castings.

THE KIT
       The kit produced for those whose machining facilities or skills are limited or whose modelling time is at a premium. The boiler is built, tested and certified. The cylinder unit comes as a ‘loose assembly’ with pistons and valves in place ready for you carry out the final assembly and sealing. The crank axle is ready built as are the hand and axlepump bodies. The kit includes 23 laser cut steel items, over 130 etched brass components, pressure gauge, screws, nuts, rivets, ‘O’ ring seals, springs etc. With all machining done. To complete the assembly you will require a bench and vice, some hand tools, a drilling facility (which could be an electric drill on a stand) and a small gas torch for soldering. The work includes bending sheet metal, drilling piloted holes out to size, tapping threads in holes ( in many cases nuts could be used instead), soft and hard ( silver) soldering of small items.
The model making hobby is littered with part built projects which have been abandoned because the modeller has hit a problem. We offer a ‘get out of trouble’ service. It could be advice on the phone, a practical soldering training session in our works, correcting a mishap or setting valve timing. Apart from phone calls, a modest charge will be made for time (above 2hrs) spent on getting models out of trouble.

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