Tag Archives: fabricated trailing truck

General Steam Navigation Locomotive Restoration Society awards contract for Trailing Truck restoration and confirm the grade of steel for new crank axle.

At the Annual General Meetings of the General Steam Navigation Locomotive Restoration Society (GSNLRS) and General Steam Navigation CIC we were delighted to announce that following the removal of the trailing truck from the frames in October 2020 and months of preparatory work by their hard working volunteers, that the restoration contract for the trailing truck has been awarded after a tender process to North Norfolk Railway Engineering.

Located at Weybourne Engineering works, North Norfolk Railway Engineering presented a strong bid for the work, with a high level of engineering detail, that respects the historical merit of the unique in preservation fabricated Merchant Navy trailing truck.

Originally fitted to a series 3 Merchant Navy, our fabricated trailing truck is the last survivor of its kind. Lighter than the cast truck fitted to the other preserved Merchant Navy locomotives, longer than a Light Pacific’s truck, the GSNLRS are having this unique piece of Bulleid locomotive design restored to mainline standard, a crucial step towards GSNLRS’s vision of an original Merchant Navy with original air smoothed casing and Bulleid’s patented chain driven valve gear.

Funding for the Trailing Truck restoration has been via our Trailing Truck Transformers Fund Club and ‘Lots’ being available for purchase to join the club. Membership of our Trailing Truck Transformer Fund Club is still available, for details click here.

For more information on the North Norfolk Railway go to: www.nnrailway.co.uk

Crank Axle Steel Selection

Since 1966, 35011 has been without it’s central crank axle. Alongside the missing valve gear, this has been the driving force behind the decision to return to original design condition, due to the cost of replacement to either design being similar.
After many years of behind-the-scenes research in the BPLA collection & National Archive in Kew, and recent detailed Finite Element Analysis conducted at the University of Birmingham, under the supervision of Professor Karl Dearn, has demonstrated that A4T steel is of a suitable grade for the correct balanced crank axle design for 35011 in original design condition.

The stress report of the balanced design maximum stress reduced by 23%

This means the GSNLRS can proceed to final design of the central axle & balancing of the motion, and the order placement for the steel in the coming months and moving the project further forwards to a functioning original Merchant Navy once more.
For more information on the University of Birmingham FEA Project outcomes  click  here:

These two announcements are major steps forward for the General Steam Navigation Restoration Society, for more information on how you can help support  the project click here.

35011 General Steam Navigation fund opened for the transportation and tyre profiling of the bogie and trailing truck wheelsets.

On 2nd October 2020, the boiler of Ex-SR Bulleid Merchant Navy Class, 35011 “General Steam Navigation” was successfully lifted from its frames for the first time since 1959 and the separation of the trailing truck from the frames. The General Steam Navigation Locomotive Restoration Society is now seeking funds to help overhaul the front bogie and trailing truck wheelsets.

35011 front bogie at Eastleigh Works 1959

It is  estimated that the trailing truck axle will be machined by a contractor off site in early 2021. This is where we need your help we are fundraising to help cover as much as the cost as possible with the target being set at £3,500.

The unique in preservation fabricated style trailing truck of 35011

Supporters can donate to the cause via the Society’s JustGiving page at https://www.justgiving.com/crowdfunding/gsnwheelset

Work on 35011 will now be directed to the restoration of the chassis, trailing truck and the front bogie and further fund-raising campaigns will be launched in due course.

You can help support us in many ways if you are not already a Society member you can sign up for membership for only £12 per year here, or donate to the Society here or even better join us as a shareholder here.

As always thank you for your continued support.