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Thought it was Windrush , But you know what thought did cheers

Hi Basil, may pay to have a word with George on the Modelboatmayhem forum as he built a version of Bob Kirtleys engine in a radio controlled speed boat. He goes by the name Ooyha from memory. On this forum I think it may have been a gentleman Windrush? did a wee write up and like Bob Kirtley he...

Part roughly to length and use a back stop. http://www.homews.co.uk/page93.html

Yep , such is life :) . Had to make an internal one myself recently for a variation on a Keats chuck keep well

55 degrees ,Whitworth

With a decent spray bottle eg Hozelock or similar you can get some decent pressures .My set up will go to nigh on 160+ psi Try and find thinner walled silicone tubing as it goes through the boiler bushing easier or at least on my 1/4x40 ones The fishing guys use some nice silicone tubing thats...

He probably uses a Goodall valve. The 16mm loco guys use them a lot https://www.homemodelenginemachinist.com/threads/my-version-of-a-goodall-boiler-top-up-valve.22272/

Tallow is still available https://www.bes.co.uk/tallow-lubricant-21321/

As far as I know Sandy is the only builder who used to show the calcs for firetubes others seem to brush round the prob. I think Alex Wise also uses the formulae in his book on small gas fired boilers There was some info in the Model Engineer a few years past using a different calc Alex Wise...

Sandy made some calcs available for fire tubes. He is a retired marine engineer and was a manufacturer of model steam boilers. Forgive me if this has already been covered as I struggle to read long posts due to dyslexia But here is the info he was kind enough to provide The crush strength of...

Alternatively , you could make a D bit milling cutter. Not a lot of work

Correct. The OP mentioned a cast liner Dont put Opals into an ultrasonic cleaner

I use the solution in the link and not had a prob For my small cleaner I mix 2cups soft water, 1 cup ammonia and two table spoons of dishwasher powder. It makes a reasonable solution for general cleaning...

It does help a little When I first ran my version I ran it without the tail rotor assy or the main blades One thing I found made a difference to the engines speed was to fit a ptfe washer between the flywheel and the lower main bearing.

Good luck becoming self employed .A big step but often very worthwhile Keep well Norm another from BWH on here now we are ganging up.

I now use chip breaker blades as they are cheap enough and long lasting and it saves this lazy beggar having to grind them up https://www.chronos.ltd.uk/product/spare-chipbreaker-blade-2-mm-thick-x-8-mm-wide-x-80-mm-long-m-35-hss-with-5-cobalt/

In the down load section Sandys 3inch vertical boiler and burner drawings He also set out all calculations on the mem forum K N Harris books are available for free online. The calc for firetubes is incorrect . The correct formula is on Sandys drawings as the fire tubes are subjected to external...

https://www.mamod.co.uk/

Hi, the attached write up is for smaller steam plants but the theory is roughly the same I know there is a difference but for a show engine it will give a rough idea The SBA Steam Boat Association UK have some good books for engine boiler sizing for the real thing

Good luck with the build I keep looking at it as a simple build or the Wells traction engine. The Myfordboy one to my mind looks a little more realistic Keep well