Member postings for David De'ath

Thanks for all the helpful replies and to Mike Palmer at SRS for his advice by phone. The boiler has now passed the hydraulic test.

David

Thanks for checking the articles Neil, I'm still hoping that someone will have a definitive answer.

David

Thanks for the suggestions.

Jason

I have all looked at all of the articles mentioned and one in 147 but none show the designed boiler pressure. I have a set of drawings from Nexus, some sheets from the 3" and some from 2" plans but again no design pressure for the boiler. I believe that these are the same plans sold by Sarik as TE18. A 2" sheet shows a 120 psi pressure gauge, possibly indicating 80 psi design pressure for that size.

Reviving an old thread as my query is pertinent to a John Haining model.

Hi All,

I wonder if anyone could help me please. I have recently acquired a Suffolk steam tractor designed by John Haining and serialised in ME in the early eighties. The steel boiler appears to be good and has passed a corrosion and leak test but I cannot find any mention of the design working pressure on the drawings or in the articles that described the build. I have two books by John Haining about building boilers which mention the tractor and the earlier one gives the working pressure as 100psi but the boiler was redesigned for the ME articles and is larger with many changed details. The later one has the boiler drawing without the pressure notation.

This has become a stumbling block to getting the boiler certificated since the club tester would like to see a published design showing the design working pressure before testing.

I am informed that it is possible to calculate the working pressure from the drawings but that this is quite a task. To avoid this does anyone have a set of drawings for the engine, any other document or set of calculations that could validate the working pressure. I have test records going back to 2000 which show the test pressure was accepted as 100psi.

I will, of course, cover any costs incurred. I posted this query on Traction Talk and it was suggested that here might be better.

Thanks

David