#OnThisDay in 1955, 35011 General Steam Navigation left Eastleigh works to re-enter service with the British Railways Southern Region following major repair work. The modifications that were carried out to the entire Merchant Navy class were as a result of 35020 Bibby Lines accident at Crewkerne.
On the 24th April 1953, Bibby Line whilst on approach to Crewkerne station fractured her crank axle at high speed. Luckily no one was injured, but the incident resulted in the withdrawal of all Merchant Navy class locomotives from service whilst the cause of the failure was ascertained. An examination of other class members showed that the fracture, caused by metal fatigue, was a common fault. This led to a complete redesign of the crank axle and once installed saw the locomotives return to traffic. General Steam Navigation would continue to haul trains in her original condition until 7th June 1959 when she entered Eastleigh works for rebuilding.
The crank axle continues to be a significant challenge for our project, but without this challenge we would not be pursuing the goal of restoration as an original Merchant Navy. Aided by significant insight from Andrew Marshall (35006 group), we have clarity on the design of axle we should be aiming to have fabricated. This is the redesigned, balanced crank axle that was eventually fitted to all the Merchant Navy locomotives following the Crewkerne incident. Records suggest 35019 had the balanced crank axle fitted 4 years prior to rebuilding, so we can demonstrate it is applicable to our locomotive. We have studied the report into the Crewkerne incident, to help inform our decisions with the axle. We have had insight and support on the axle material from the wider heritage industry, including our friends at the A1/P2 trust and the Clan Project, both of whom have had similar issues of design to overcome. We are missing some of the drawings for the revised design, and we are also evaluating the correct and certifiable grade of steel to use, but our aim is to have the new crank axle ordered at least in 2021, if not manufactured. FEA studies of the design are underway at the University of Birmingham
Our current immediate objective is to restore her unique trailing truck which has led to the Trailing Truck Transformers Fund Club being set up to fund restoration of this unique component in 2021. You can find out how to join the exclusive club by visiting our website on the link below. Thank you
Photo: GSN leaving Exmouth Junction Shed on 5/9/57. The locomotive is believed to be heading to Exeter Central to work an up service (Copyright Brian Marshall)
February 2021 Update
Whilst Covid19 has been affecting both our financial and engineering efforts, the Society is delighted to report that new parts continue to be constructed. Recently the front bogie spring beams were delivered by Ashbrook Engineering Ltd; the Society is extremely grateful to Mr Alan Dixon who sponsored their construction. Along with the efforts of Mr Tony Simmonds who is machining the spring hangers for the Society, work on the bogie is progressing at a good pace.
Work continues with converting the BPLA drawings of the frames & valve gear into CAD to allow us to have replacement parts manufactured. This is a lengthy process, but one that is vital for our goal of reengineering the existing frames to a condition where they can accommodate the original chain-driven valve gear and replacing the middle cylinder. In time we will also have the drawings of the smokebox and air-smoothed casing transferred to CAD for the same reason.
The Trailing Truck Transformers funding group continues to be our primary fundraising campaign with its objective of funding the restoration of GSNs trailing truck. The Society is pleased with the initial number of members who have signed up for blocks but are under no illusions that its still along way from being funded. We are offering a maximum of 30 members the opportunity to purchase a ‘Lot’ for £500. Members are welcome to purchase as many ‘Lots’ as they wish up to the maximum target amount.
Members of the Fund Group would receive a number of benefits including:
- Certificate of membership of the ‘Trailing Truck Transformers’
- Name engraved on a suitable brass plaque attached to the refurbished Trailing Truck
- Regular updates on the refurbishment of the Trailing Truck
- An invitation to a VIP day at the Swindon and Cricklade Railway to see the completed Trailing Truck once it is returned to the railway.
We understand that £500 is a lot of money and for people who wish to support the trailing truck but are unable to join the Trailing Truck Transformers club you can help us by donating to our Wheel Set appeal on our JustGiving page here.
Alternatively you can make a donation however large or small into our newly launched Putting Funds into the Frames campaign here…
The 35011 Twenty Twenty Club winners have been drawn for January.
Congratulations go to:
1st Prize – David Oborn, 2nd Prize – Simon Shutt, 3rd Prize Allan Bott
The Twenty Twenty Club is a great way to help raise funds for the locomotive and at the same time have a little bit of fun. We still have the last few places remaining find out how to join here.
2021 is shaping up to be a very important year for the project with some big goals in mind. You can help support us in many ways if you are not already a Society member you can sign up for membership for currently only £12 per year here, or donate to the Society here or even better become a shareholder here.
Finally some of our trustees will be making a guest appearance on the “Railwaymania” podcast and will be answering questions from members and the general public. If you have any questions you’d like answering please send them to us on Facebook, Twitter, Instagram or through our website and we’ll ensure as are answered on the podcast as possible.
As always thank you for your continued support.