Try allowing more air to be drawn in at the burner. ----- Original Message ----- From: "PeteH" <[EMAIL PROTECTED]> To: "Multiple recipients of sslivesteam" <[EMAIL PROTECTED]> Sent: Monday, September 01, 2003 11:40 AM Subject: BPE boiler mods?
> Has anyone modified the vertical Midwest boiler as used in the Basic Project > Engine? I have made some changes with mixed results and am soliciting > advice to see if I am on the right track. The first change was to replace > the brass chimney with a 'type L' copper tube of the same diameter. The > second was to add a 'dry-pipe separator' inside the boiler and the third > (which I am sure is the culprit) is the addition of a superheater. > > The superheater is made from 1/8" copper tubing and connects about 3/4 of > the way up the chimney, the section inside has been annealed and twisted > into a very loose spiral of about 3-1/2 turns in 5 inches. At the bottom of > the chimney it makes a gradual 90 degree bend and projects out one of the > holes in the lower shroud surrounding the fuel 'pot'. > > The problem I am having is in keeping the fire burning, caused I assume by > the placement of the superheater in the chimney restricting the draft. The > inner diameter of the chimney is just under 9/16", although I guessed that > the loose spiral would allow enough draft I seem to be in error. I wouldn't > think bringing the end of the 1/8" superheater pipe out one of the 7 intake > holes would cause it? I even tried using the exhaust from the motor as a > 'blower' to help induce the draft without any luck! > > I will replace the spiral superheater pipe with a simple straight pipe along > with making a new exit hole to see if this fixes the problem, am I on the > right track? > > Kindest Regards, > PeteH >
