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5 inch gauge LNER A1 Pacific "Madge Wildfire" - stock code 9283

A well-advanced 5 inch gauge LNER A1 Pacific "Madge Wildfire" to the Michael Breeze design, the work of a highly experienced builder with many other locomotives - from 2 1/2 inch to 7 1/4 inch gauge - to his credit.

Having previously built a 7 1/4 inch gauge A4 "Sir Nigel Gresley", the A1 in 5 inch gauge followed. Designed by Peppercorn just after the war, the A1s featured three sets of Walschaerts valve gear, rather than using the Gresley-Holcroft conjugated gear with its derived motion for the middle cylinder.

Work to date is to a high standard. The locomotive chassis is complete, including draincocks and compensated brake gear - silky smooth to turn over, it looks to have been run in on air for some hours; driving wheelsets run in prototypically correct split bronze axlesboxes.

The combustion chamber boiler is exceptionally well made, neatly flanged and with good solder penetration throughout, firebox is bushed for a fusible plug. The backhead has water gauge fittings, clack valves and regulator; a pair of spring type safety valves are fitted.

The tender chassis is largely complete, the tank is part-built in brass, with a pack of profiled brass for the cab.

Complete with 24 sheets of drawings.

Despite efforts to save 60145 "St Mungo" - then only 17 years old - all 49 of the original class were scrapped by 1966. In 2008 a 50th locomotive of the class - 60163 "Tornado" - was completed at Darlington.

gauge 5 inch
length/inches 50 + 28
width/inches 10
height/inches 15
bore x stroke/inches 1 11/16 x 2 5/16
wheel material cast iron, 7 3/8 inch diameter
axlebox type split bronze
cylinder material 3 x cast iron
valve type piston
valve gear 3 x Walschaerts
reverser type screw
boiler maker P Beeby
boiler type locomotive with combustion chamber
boiler material copper
boiler construction silver soldered
fusible plug yes
safety valve(s) 2
safety valve type spring