Engineering update - January 2013

Following on from the assembly of the three 6' 9" driving wheelsets for 'The Unknown Warrior' at South Devon Railway Engineering last year, quartering and fitting of the crank pins has now taken place. There are four different designs of crank pin that are needed for 'The Unknown Warrior'. The quartering of the crankpins ensures the correct alignment of the crank pins in relation to the cranks and axles. The lining up for this job took nearly two hours per crank pin, while the boring process took around a day to complete for each hole, with each cut taking around 15 minutes. About 30 cuts were required, depending on the final size of hole needed for each crank pin. South Devon Railway Engineering is believed to be the only railway engineering workshop that can do traditional crank pin quartering.

A review of Progress During 2012

 

WHEELSETS

All wheelsets now have a full set of tyres – quartering of wheels to be completed after Christmas. Crank pins to be manufactured and fitted during January 2013. Balance weights to be fitted during January 2013.
Wheelsets to be despatched to Llangollen mid February 2013, with painting of wheelsets to be completed during February/March 2013.

DRIVING AXLEBOXES

'The Unknown Warrior' Acquires 'Royal Scot' Tender

The LMS-Patriot Project has acquired a second Fowler tender that was originally built for a 'Royal Scot' class loco. The ex Barry scrapyard tender, purchased from the East Lancashire Railway at Bury, will be stripped and after a thorough assessment will be considered for restoration and eventual use with 'The Unknown Warrior'.

Driving Wheel Axle Boxes

New driving wheel axle boxes are being made for 'The Unknown Warrior. The axle boxes from unrestored ex Barry Stanier 8F number 48518 were found to be of different dimensions to 'Patriot' axle boxes.

A 'Royal Scot' axle box pattern that was obtained from Wroughton needed too many modifications to make it suitable for use with 'The Unknown Warrior'.

A new 'Patriot' axle box pattern has been made by Master Pattern Maker Eddie Mocroft at the Boro Foundry. Six new loco driving wheel axle boxes have been cast. These are being machined before being fitted to the driving wheels to enable the rolling chassis to be assembled.

£500,000 Appeal Launched for New Boiler

Pete Waterman, pop mogul, steam enthusiast and loco owner was present at the launch of a £500,000 appeal for the boiler for 'The Unknown Warrior' on 19th May at the LNWR Heritage Loco works. The all new parallel ‘Fowler’ boiler of traditional construction with a copper firebox has been commissioned by the LMS-Patriot Project, the charitable group who are building the new Royal British Legion endorsed National Memorial Engine.

Spring Hangers and Cross Stay Blanks Made for 'The Unknown Warrior'

Twelve spring hangers have been made for 'The Unknown Warrior' with assistance from Project Director Neil Kinsey. The spring hangers were machined at Fastlok Engineering Ltd. in Nottingham and have now been taken to the Llangollen Railway Works to enable the rolling chassis to be assembled.

The blanks for the cross stays have also been manufactured.

Photos by Andrew Laws and Neil Kinsey.

Spring Hangers and Cross Stay Blanks Made for 'The Unknown Warrior'

Twelve spring hangers have been made for 'The Unknown Warrior' with assistance from Project Director Neil Kinsey. The spring hangers were machined at Fastlok Engineering Ltd. in Nottingham and have now been taken to the Llangollen Railway Works to enable the rolling chassis to be assembled.

New Driving Wheel Springs Made for 'The Unknown Warrior'

The first new items for 'The Unknown Warrior' to be completed during 2012 were six driving wheel springs. These were made from new by Owen Springs of Rotherham. They were assembeld with 14 separate leaves. The last of the six springs was assembled at Rotherham on 9th January. The springs will be delivered to the Llangollen Railway Works and fitted to the driving wheelsets once completed.  

Owen Springs have previously refurbished the tender springs for the Fowler tender that is being refurbished for use with 'The Unknown Warrior'

Dragbox Completed at Llangollen Works

The drag box for 'The Unknown Warrior' was completed during December 2009 at the Llangollen Railway Works. The steel plate was delivered to the Works in pre-cut sections where coded welder Ian Massey welded the sections together to form the new dragbox. The completed dragbox will require heat treatment off site to even out the stresses within the newly welded structure. The dragbox will then be returned to Llangollen for fitting in the frames, at the cab end of the locomotive.

The newly welded dragbox is seen in the images below, taken at Llangollen on 20th December.

Frame Stretchers Delivered to Llangollen

Four frame stretchers were delivered to the Llangollen Railway Works during December 2011 and are awaiting fitting to the frames of 'The Unknown Warrior'.

The stretchers which were cast from new patterns made by Eddie Mocraft at the Boro Foundry, were machined before delivery to Llangollen. The four stretchers arrived at Llangollen in protective plastic sheeting.

The stretchers will be fitted between the frame plates of 'The Unknown Warrior' to enable a rigid assembly to be built. New drawings for the fifth stretcher are being completed. 

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