The Bolton -Bertinat -Bailey Triple expansion engine ▦ 11 Jan 2025

Hi All I am now continuing with this engine that I. started ten years ago after completing the High pressure cylinder part. I now have all the castings and this is what I fi shed in 2014 ??!!!

Willy

These are the parts  I cannot find the previous posts from ten years ago but they should still be available
Willy

Hello Willy,
I'm glad that you want to work on model steam engines again.
An exciting project.

Michael

Hi Willy, good to see you back in the workshop after a break.

Looking forward to seeing you finish this great engine.

I hope you are keeping good health.

MJM460

Willy

What is the origin of the casings? I almost bought a similar set from Reeves 2000 two years ago. Instead I got a brand new set of Stuart Marine Compound castings from a fellow model engineering society society. I am building this as my Saturday model between working on my major project. I must get down to doing a lot of workshop work when it gets warm. There is a lot to do!

AVTUR

The castings were from a fellow model engineer here in Norwich and the HP cylinder castings was a bit rough after machining with a few blowholes etc .. but relatively cheap but I don't know where he got them from ??
Willy

Is the Bailey any relation?

Glad to see you back in the workshop Willy!

Simon.

Hi Willy
the bolton engine is great model  looking forward to following your work
John

Good luck with this. It's a worthwhile challenge!

Good to see you back Willy       I shall be following        Terry

The IP and LP bores have been machined using my homemade boring head ..this has served me well over the past 50 odd years  in the old days we used to make a lot of our workshop kit ?! also the steam chest have been completed and the parts drilled and tapped to hold the cylinder block together .......
Willy

The valve rods have been made from silver steel and to make the thread cutting easier  I use a strong spring that preloads the die holders you just revolve it to cut the thread ...I have found that pushing the die holder as well as turning it is quite tricky. I also used the same method to cut the thread for the IP port transfer pipe in the cylinder block. This part of the cylinder head is at an angle, so to cut the thread after drilling the hole the tap is held in the chuck and a preload spring is inserted on the quill stop arrangement at the top ..also a special "spanner" was made to turn the tap ................

Willy

Hi all, these are the latest pics of the construction so far , the title is called the Bolton  Bertinat  Bailey engine because the original engine was designed by Bolton with an update serialised in the model engineer magazine by Bertinat and my name is Bailey.......... the engine cylinders and the steam chests have been made and bolted together and I have colour coded how the parts fit. So still a huge amount of work still to do ..........

Willy

Thats looking fantastic,  a lot to that engine!