GWR 7200 Class
Introduction
7250
Model
| 1 | Pony | 3ft 2in | 6.34mm | 3-060 6mm spoked bogie/tender wheels |
| 4 | Driving | 4ft 7½in | 9.25mm | 3-007 9mm spoked driving wheels |
| 1 | Radial | 3ft 8in | 7.34mm | 3-062 7mm spoked bogie/tender wheels |
Mashima 9/16
Gear Ratio = Motor RPM x Wheel Dia. (mm) x 0.018 / Prototype Speed (mph)
Gear Ratio = 25000 x 0.75 x 9 x 0.018 / 50 = 60:1
Frames & Spacers, Bearings, Frame width, Body Mounting
Simpson Springing
Brakes Sanding Gear Balance Weights
Lead Weight
Coupling Rods
Pony Truck (Side Control?)
Radial
Wheels
Crank Throw Cylinders & Valve Gear, Cylinder Mounting
Motors, Gears
| Books | ||
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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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| Magazines | ||
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Great Western Railway Journal No. 18 '72XX' Goods Tanks John Copsey |
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| Links | ||
| 7200 Trust 7200trust.org.uk |
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| Buckinghamshite Railway Centre Stock Book 7200 brc-stockbook.co.uk/7200.htm |
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| Didcot Railway Centre 7202 didcotrailwaycentre.org.uk/locos/7202/7202.html |
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| GWR 7202 www.baldric.plus.com |
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| The Great Western Archive 7200 Tank Class Introduction greatwestern.org.uk/m_in_282.htm |
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| Wikipedia GWR 7200 Class en.wikipedia.org/wiki/GWR_7200_Class |
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