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 47XX 2-8-0
LOCO SPECIFICATION

 Scale:-                  10mm to 1 foot

Length:-               660mm (26”)
Track radius:-      2.3m (7’6”t) minimum
Weight :-             5Kg  (10 lb ) est.

Fuel :-                  Alcohol  (Methylated spirit) supplied by constant
                            level feed system to a ‘toast rack’ style wick burner.

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

Controls :-   loco:    Regulator, blower, low water level  test valve, pressure  
                             gauge.
                tender:   water pump bypass,  fuel valve.

Cylinders                Two, 12.7mm dia x 22mm stroke (1/2” x 7/8”)

Valvegear               Slip eccentric, slide valves, between frames

Lubrication             Displacement (Rosco) type.

Water feeds           Tender carries water in rear tank containing  hand pump.
                             Loco has axle pump driven from driving axle.

General                  Buffers and coupling hooks sprung.
                            Main loco axleboxes individually sprung.
                             Pony truck  sprung.
Complete kit Spirit
             3500 gallon tender    Or 4000 gallon tender

£2,586

          


Production :-     Batch 4, SOLD OUT

                                     
Technical details

Select Typical steam kit for a detailed view of what a typical kit contains.

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

typical kit BACK.

       In 1919, G.J.Churchward amalgamated his 43xx Mogul design, the Swindon No.1 boiler and an extra driving wheel set to produce the 47xx mixed traffic 2-8-0 locomotive. This proved a successful combination but a little short on steam. A new boiler was designed for the loco, this becoming the No.7, and by mid 1921, the prototype, 4700, was fitted with it. The new smokebox layout also required outside steam pipes. The other 8 locos forming the class were built during 1922-3 to this later design.

As a mixed traffic loco they worked on fast freight, parcels and passenger trains and proved very capable of any duty. They were a heavy engine and this restricted them from many routes.

          They lasted well through BR days until the last one was scrapped in 1963.

          This kit is of the large boilered version which covers the whole 47xx class from 1923. These models will all be spirit fired with hand and axle driven pumps. The loco will be fully spring. Two tender options are available, the 3500 gallon used between 1923-32, or the 4000 gallon used from 1932. There is also a choice of buffer stocks, tapered or parallel.


THE MODEL MAKERS KIT

      These kits 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 units come as a ‘loose assembly’ with pistons and valves in place ready for you carry out the final assembly and seal it up. Items such as hand and axlepump bodies are pre assembled. The kit includes  laser cut steel items, etched brass components, all machining done, pressure gauge, screws, nuts, rivets, ‘O’ ring seals, springs etc. 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. Included in the price are two hours of our time, 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 spent over your two hours.

         We can also supply replacements for individual components providing they are returned for us to identify. For etched items there will be charge depending on the size. Whitemetal returned with stamped addressed packing are free. Laser cut steel may be a problem as there are minimum order quantities involved and we shall only order a limited number of spares.

The Construction  Guide comprises over  30 pages of photographs, exploded diagrams produced on 3D CAD and text, together with identification diagrams and drawings. It takes you through each stage, including jigs and methods, settings and adjustments, finishing with operation and use.

Move over pictures to magnify