5 inch vertical test boiler

Back in 1978, Tubal Cain wrote a short constructional series in "Model Engineer" describing a 5 inch diameter vertical coal-fired boiler. The design was an enlarged version of a boiler he had described a few years previously, itself based on a much earlier "LBSC" design. Designed for coal-firing, the boiler can also be run on a propane burner and featured 51 x 5/16 tubes with a central flue-tube superheater.

Apparently built to that design, this is a nicely made boiler, complete with both both gas burner and solid-fuel grate.

Hydraulic tested at 160psi for 80psi working pressure, complete with all fittings although the pressure gauge will require replacement - the boiler really needs a 0-120psi gauge.