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Construction

Hornblocks and other parts….

24/02/2016

Components continue to be delivered to Darlington Locomotive Works, machining of these then takes place followed by assembly on the frames….

01261601 Manganese steel liners during inspection Bob Hughes

Manganese steel hornblock liners after delivery to DLW for inspection – Bob Hughes

02201603 David Elliott

A hornblock is prepared for a trial fit – David Elliott

02201602 David Elliott

The three leading coupled axlebox hornblocks are offered up – David Elliott

02201601 David Elliott

Tha fabrication for the combined frame stay and motion bracket has been delivered – David Elliott

02201604 David Elliott

The smokebox door ring is seen during machining – David Elliott

Splashers!

20/02/2016

Although thay may not be obvious, the P2s possessed splashers, albeit rather small and hidden under the footplating.  Work to fabricate and fit these has been progressing well at Darlington Locomotive Works – all photos by Bob Hughes.

02161601 Bob Hughes

02161602 Bob Hughes

02161603 Bob Hughes

02161604 Bob Hughes

02161605 Bob Hughes

More components = more construction!

11/02/2016

12141503 Pony truck top centre trial fit DE

 The pony truck centre stay is trial-fitted to the frames – David Elliott

01121601 Hornblocks nearing completion at Multi Tech DE

Hornblocks nearing completion and ready for fitting – David Elliott

01121602 8 tender wheels following proof machining DE

Eight machined tender wheels – David Elliott

01121603 Pony truck and Cartazzi wheels follwing proof machining DE

Machined pony and Cartazzit truck wheels – David Elliott

01151602 Cab trial fit DE

Cab trial fitted to the footplate – David Elliott

01231603 DLW Mandy Grant

Drilled and profiled tender frames – Mandy Grant

02081603 DLW Tony Lord

Splashers taking shape – Tony Lord

02081602 Splasher DE

The splasher viewed from the underside – David Elliott

A pattern for the chimney

05/02/2016

Wesley Atkinson at South Lincs Foundry has completed the pattern for the Kylchap double chimney.  It may look simple but the fabrication of this pattern and the cores has consumed many man hours and pattern making is one of the biggest expenses in the casting process.  We think the effort has been worth it for the finished article is superb!  You can sponsor this important pattern for £2400 or 40 monthly payments of £60 – contact Mark & Mandy Grant by emailing  

On the basis that a picture is worth a thousand words, here are a selection taken by Wesley Atkinson.

02021501 Chimney Pattern Wesley Atkinson

02021503 Chimney Pattern Wesley Atkinson

02021504 Chimney Pattern Wesley Atkinson

02021505 Chimney Pattern Wesley Atkinson

02021502 Chimney Pattern Wesley Atkinson

02021506 Chimney Pattern Wesley Atkinson

02021507 Chimney Pattern Wesley Atkinson

02021508 Chimney Pattern Wesley Atkinson

02021511 Chimney Pattern Wesley Atkinson

02021509 Chimney Pattern Wesley Atkinson

02021510 Chimney Pattern Wesley Atkinson

02021512 Chimney Pattern Wesley Atkinson

02021513 Chimney Pattern Wesley Atkinson

02021514 Chimney Pattern Wesley Atkinson

 

Frame stay re-designs

02/02/2016

The first of the large frame stays which have been re-designed as fabrications is presently being manufactured by North View Engineering Solutions in Darlington. This is the Frame Stay and Inside Motion Bracket.

12091505 CAD Frame stay and motion bracket combined as fabrication

Apart from holding the frames together, it also supports the inside cylinder slide bars. On the original P2 design it also had a saddle incorporated to support the front of the boiler where it joins onto the smokebox. 

12091502 CAD 2007 frames camera

Apart from the decision to use Tornado’s shorter boiler causing the saddle to be in the wrong place, firmly attaching the back of the smokebox to the frames, in addition to bolting the front of it to the saddle on the top of the cylinder block gives the potential for cracks in the smokebox. This arises from the smokebox becoming much hotter than the frames when the locomotive is operating setting up severe stresses due to the smokebox expanding more than the frames.

12091501 CAD 2001 boiler support and motion bracket combined

Original P2 frame stay and boiler support

12091501 CAD 2007 boiler support and motion bracket combined modified for Diagram 118A boiler as fabrication

Modified stay for No. 2007

This problem was avoided with the A1 design by supporting the front of the boiler (and hence the rear of the smokebox) on a sliding foot to permit expansion. We are using the same arrangement for Prince of Wales. Meanwhile the next of the large frame stays, the Intermediate Frame Stay which as well as being redesigned as a fabrication has been modified to carry one air brake cylinder and an air pump instead of the original two vacuum cylinders has been ordered from North View Engineering Solutions.

12091504 CAD Intermediate frame stay as fabrication with pump and brake cylinder

Application of the Finite Element Analysis simulation package recently acquired to use in conjunction with Solidworks 3D CAD has indicated that the revised design has similar strength margins as the original, even with the addition of a 370 kg air pump. 

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The P2 Steam Locomotive Company
Darlington Locomotive Works
Hopetown Lane
Darlington
DL3 6RQ

01325 460163

Darlington Locomotive Works – The works are open to the public on the first and third Saturday of each month, the latter a day that coincides with NELPG also opening their doors to visitors – 11:00hrs to 16:00hrs

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To develop, build and operate an improved Gresley class P2 Mikado steam locomotive for main line and preserved railway use. All Images Copyright A1SLT

Gresley P2 2007
Gresley P2 2007@Gresley_P2_2007·
7 Dec

The presentation is now underway, as David introduces the project to this morning's attendees.

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Gresley P2 2007@Gresley_P2_2007·
7 Dec

All set up for today's P2 Roadshow taking place in conference room 2, Pendulum Hotel Manchester.
Join us for an informative presentation led by our engineering director David Elliott. Presentation starts at 11am.
FREE entry, all are welcome.
We look forward to meeting you!

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Gresley P2 2007@Gresley_P2_2007·
5 Dec

https://www.p2steam.com/category/construction/

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