Search found 1585 matches

by fredrosse
Fri Jun 14, 2019 12:10 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

"......creating a larger then needed condenser and plugging some tubes to restrict cooling water allowing the ideal condensate return temp. Thoughts??" ANS: Plugging some tubes will only reduce the intended function of the condenser, and result in higher engine exhaust pressure. If the condenser pro...
by fredrosse
Wed Jun 12, 2019 1:55 am
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

"Condensate temp should be as low as possible to provide maxiumum vaccum, so adequate cooling water should flow in the condenser and a vac pump to allow this." ANS: A better way to express this: "Engine exhaust temp/pressure should be as low as possible to provide maximum engine efficiency, so adequ...
by fredrosse
Sat Jun 08, 2019 10:51 am
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

This is a rather long and boring presentation, so most steamboaters should skip to the next entry on this thread. In terms of thermodynamics, the low end temperature of the cycle is very relevant to plant efficiency. Fundamentally steam plants should have their low end temperature (exhaust condensin...
by fredrosse
Thu Jun 06, 2019 3:12 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

In boiler jargon, an economizer is a feedwater heating device that gets its heat source from the flue gas that has already passed through the main boiler evaporating (boiling) section, and captures heat that would otherwise pass up the stack and be wasted. Hence the term "economizer". Putting a coil...
by fredrosse
Thu Jun 06, 2019 1:38 am
Forum: Rally Reports
Topic: First Steamboat Meet - Noximixon
Replies: 0
Views: 136

First Steamboat Meet - Noximixon

2nd Saturday of June, that would be 08 June 2019, is that correct Don?
by fredrosse
Fri May 31, 2019 2:16 pm
Forum: Technical - non Engines and Boilers
Topic: Propellor tip clearance
Replies: 8
Views: 326

Re: Propellor tip clearance

I agree with Ron, the rules for prop clearance are generally based on power levels that are far beyond what we steamboaters have, so violating the 15% clearance minimum rule is most probably OK.
by fredrosse
Fri May 31, 2019 2:12 pm
Forum: General Steamboat stuff
Topic: Searching for my Steamboat's History
Replies: 3
Views: 141

Re: Searching for my Steamboat's History

Looks like a wonderful conversion. On our lake (Noximixon in PA) I have been looking at Thistles for this exact purpose for years, great hull for a light weight steamer.

Best wishes to get steaming soon.
by fredrosse
Fri May 31, 2019 2:03 pm
Forum: Technical - Engines and Boilers
Topic: Fuel oil preferences
Replies: 5
Views: 227

Re: Fuel oil preferences

Liquid petroleum fuel has three basic forms available to steamboaters: 1. Gasoline, or Petrol. The low temperature of the flash point for this fuel generally make it to be considered too dangerous for our boating needs. 2. Kerosene (USA Name), or Paraffin Fuel (UK) is probably the best thing to use,...
by fredrosse
Fri May 31, 2019 1:31 pm
Forum: Technical - Engines and Boilers
Topic: Opposed Piston Engine Project - The Steam Version
Replies: 41
Views: 2668

Re: Opposed Piston Engine Project - The Steam Version

"I now significantly reduced the inaccuracy by often turning the work pieces 180° after a couple of seconds of drilling. And it works, but this can't be it. How do you drill holes really orthogonally, which go through the material?" Actually, this method is indeed "it" Drilling from both sides, with...
by fredrosse
Mon May 27, 2019 12:36 pm
Forum: Technical - Engines and Boilers
Topic: New Stainless Economizer
Replies: 17
Views: 496

Re: New Stainless Economizer

Using whistles from large steam locomotives invites heavy priming when the whistle consumes about 10x the boiler's normal capacity. I currently have a 3/4 inch whistle, and between the boiler and whistle valve I put a 3/4 inch gate valve. With 5 PSI on the boiler I can get plenty of whistle sound, b...