Search found 1603 matches

by DetroiTug
Thu Jun 13, 2019 1:35 pm
Forum: Technical - Engines and Boilers
Topic: Increasing a VFT boilers output by increasing the firebox size
Replies: 17
Views: 493

Re: Increasing a VFT boilers output by increasing the firebox size

The utility industry has other means of squeezing maximum economy out of a boiler system, but that is another story.
Fred, When you have time I would be curious as to what that method is beyond feedheaters.

-Ron
by DetroiTug
Tue Jun 11, 2019 1:21 pm
Forum: Technical - Engines and Boilers
Topic: Increasing a VFT boilers output by increasing the firebox size
Replies: 17
Views: 493

Re: Increasing a VFT boilers output by increasing the firebox size

flared funnels (tapering from small to large - base to top) seems alot of traction engines, wagons etc seem to have them..? I think the reason they did that is they were puffers exhausting up the stack. The engine exhaust went through a smaller nozzle aimed upwards, the flared stack created like a ...
by DetroiTug
Mon Jun 10, 2019 9:29 pm
Forum: Technical - Engines and Boilers
Topic: Increasing a VFT boilers output by increasing the firebox size
Replies: 17
Views: 493

Re: Increasing a VFT boilers output by increasing the firebox size

Is there a way to work out how much draft you can get through the tube passage and proportion the ash pan door, grate and funnel accordingly? Yes, there are formulae for just about anything on a small steam plant, but my experience has been, experimentation is the only method that provides a truly ...
by DetroiTug
Fri Jun 07, 2019 3:18 pm
Forum: Technical - Engines and Boilers
Topic: Increasing a VFT boilers output by increasing the firebox size
Replies: 17
Views: 493

Re: Increasing a VFT boilers output by increasing the firebox size

Not sure if it was intentional or not, but I calculated the heating surface of your tubes and it works out to 31.416 sq ft which is 10 X pi. Weird coincidence. Quoted: 1. economizer (Yes the more the merrier, as long as it isn't interfering with steam generation) 2. skin the smoke box & funnel (Abso...
by DetroiTug
Fri Jun 07, 2019 2:41 pm
Forum: Technical - non Engines and Boilers
Topic: Southworth 12" Vertical pumps
Replies: 76
Views: 29630

Re: Southworth 12" Vertical pumps

They've held up just fine, but they are a bit finicky. The steam/water going to the steam side needs to be very clean. The O-rings on the piston and valve rods need to be high durometer neoprene. Have to lubricate this pump with a good reliable displacement oiler, can't run O-rings and rely on satur...
by DetroiTug
Tue May 28, 2019 12:39 pm
Forum: Technical - non Engines and Boilers
Topic: Propellor tip clearance
Replies: 8
Views: 326

Re: Propellor tip clearance

As simply a testimonial rather than suggestion, mine is very close to the hull and it hasn't caused any problems. The RPM we typically run and the amount of thrust we're working with, we can get away with a lot.

-Ron
by DetroiTug
Mon May 27, 2019 1:34 pm
Forum: Technical - Engines and Boilers
Topic: New Stainless Economizer
Replies: 17
Views: 496

Re: New Stainless Economizer

Not all whistles are created equally, sounds as though you have one designed for low pressure, or someone has been playing with it. They are designed for a designated pressure range, the gap between the languid plate and the shell dictates the pressure in which they will tone at the right frequency,...
by DetroiTug
Sun May 26, 2019 3:26 pm
Forum: Technical - Engines and Boilers
Topic: New Stainless Economizer
Replies: 17
Views: 496

Re: New Stainless Economizer

".....the steampump/middle trycock level control that i have, it works but it's wasteful. " Sidetracking the original thread for a moment, I have also used the middle trycock level control, and it works very well. The trycock orifice is adjusted to let down full feed pump mass flow (liquid saturate...
by DetroiTug
Sun May 26, 2019 2:54 pm
Forum: Technical - Engines and Boilers
Topic: New Stainless Economizer
Replies: 17
Views: 496

Re: New Stainless Economizer

Quote: "More than once I have forgotten to open the feed water isolation valve at the boiler. There is some non-metallic line in that system so the pump doesn't stress out particularly or blow a fitting." Just put a small relief valve on the discharge side of the pump. The small brass air relief val...
by DetroiTug
Sun May 26, 2019 2:44 pm
Forum: Technical - Engines and Boilers
Topic: New Stainless Economizer
Replies: 17
Views: 496

Re: New Stainless Economizer

Something to keep in mind that we have encountered is overheating the economizer when not pumping water. We've mainly encountered it when we've had a hot fire going while waiting to leave and the engine isn't running. The economizer gets so hot that when we did start running the engine and pumping ...