Alexander Seal

GWR 3440 City Of Truro

Wheels

Bogie - 3ft 8in / 7mm

Driving - 6ft 8½in / 13mm

Tender - 4ft 1½in / 8mm

Introduction

1401 "Titfield" Black (GWR Wartime Black)

1952

1466 BR Black Early Emblem

Photo - Peto's Register

1472 BR Lined Green Early Emblem

.

5813 GWR Green

Retained GWR Green until withdrawal

Bath Road until May 1957

GWR Green ND-009 1472, ND-017 1403 (No Topfeed)

Model

Dapol body

2mm Scale Association (Shop 3)
2 3-009 10mm spoked driving wheels (Mk4 type) £7.00 pair
1 3-063 7.5mm spoked bogie/tender wheels (Mk4 type) £5.50 pair
1 3-100 Acetal axle muff 3.2mm o/d (driving wheels) £4.00 10 (1 req.)
2 3-102b Acetel gear muff 3.0mm o/d (metric gears) £1.00 2
1 3-103
Acetal axle muff 2.3mm o/d (bogie wheels)  £4.00 10 (3 req.)
1 3-106 Crankpin 0.5mm dia (turned brass) £1.00 10 (4 req.)
1 3-109 Crankpin cap washers - 0 6 mm bore etched nickel silver  £0.75 12 (4 req.)
1 3-112 Drive bush - turned brass £1.50 10 (1-2 req.)
1 3-113 Frame bush - P/bronze £1.00 10 (6 req.)
1 3-156 PCB frame spacer 150mm long x 6.4mm wide x 1.6mm each £1.75 1
1 3-157 PCB frame spacer 150mm long x 7mm wide x 1.6mm £1.75 1
1 3-364 Gear-set M0.25 30:1. Skew cut brass gear 3.0mm bore. Acetal worms 1.5mm and 1.0mm bore. £5.50 1
1 3-385 Spur Gear Brass M0.4 14T 3.0mm bore £2.00  
1 3-386 Spur Gear Brass M0.4 16T 3.0mm bore £2.00 1
1 3-620 GWR 14xx/48xx/58xx 0-4-2T (Dapol) £15.00 1
Branchlines?
1   Corless Faulhaber 8/16    
1   Motor mount bush if using Maxon or Faulhaber motor    
 
    0.3mm nickel silver rod    
    Decoder    
    Simpson Spring Wire    

Instructions - PCB frame width spacer?

Copper Tungsten (à la Tim Watson)

"As an example, the 14xx chassis kit uses a 30:1 worm and then a 14:16
step down. This gives a total reduction of about 34:1 which I think is
a shade on the low side, bearing in mind the 10mm diameter drivers.

On the same centres as the 14:16 combo, a 12:18 gear pair would fit
and with a 30:1 gear, this gives a 45:1 reduction, which I personally
would prefer. This is what I'm putting into my 14xx chassis, albeit
old stock Imperial 64DP which I have in my gloat box. My 14xx is a
becoming a bit like "Trigger's Broom", having changed chassis and body
at least once and it's not even finished yet. I started the project
in 1983..."

Mark Fielder

Gear Ratio = Motor RPM x Wheel Dia. (mm) x 0.018 / Prototype Speed (mph)

16500 x 10 x 0.018 / 60? = 49.5! Thus 30:1 and 12:18 = 45:1

Chassis

Couplings

Stay alive capacitors - http://nigelcliffe.blogspot.co.uk/2013/07/stay-alive-capacitors-in-2mm-scale.html

http://nigelcliffe.blogspot.co.uk/2009/03/2mm-04-progress-and-more-ct-decoder.html

Body

References

Transport Treasury

LN98 5813 (RF) St Phillips Marsh shed 3/6/56

Color-Rail

BRW1646

Books
A Pictorial Record Of Great Western Engines Volume 2 Churchward, Collett & Hawksworth Locomotives A Pictorial Record Of Great Western Engines Volume 2
Churchward, Collett & Hawksworth Locomotives

J. H. Russell
OPC
978-0-86093-399-1
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