Search found 1768 matches

by fredrosse
Tue Apr 20, 2021 3:02 am
Forum: Rally Reports
Topic: An Invitation to the Raquette Lake Steamboat Camp
Replies: 7
Views: 174

Re: An Invitation to the Raquette Lake Steamboat Camp

Sounds great, I will try to attend this year. Thanks for posting.
by fredrosse
Fri Apr 16, 2021 2:54 am
Forum: Technical - non Engines and Boilers
Topic: Reliable Monitor Plans
Replies: 7
Views: 317

Re: Reliable Monitor Plans

I would suggest you call Reliable and find out if anyone has built this hull. A revolutionary design that is very effective at dodging cannon fire, but the very concept results in a boat that is inherently not very seaworthy. If you can be OK with the seaworthy limitations, and want the novelty aspe...
by fredrosse
Mon Apr 05, 2021 1:38 pm
Forum: Technical - Engines and Boilers
Topic: Glass ejector working under steam
Replies: 8
Views: 364

Re: Glass ejector working under steam

Of the four sizes offered, the smallest one could continuously feed a boiler in just about everybody's steamboat, listed at 150 PPH (pounds per hour) feed flow, and the next size up is listed at 225 PPH, approximately for a 5 - 7 horsepower simple engine, which is well above 90% of the steamboats in...
by fredrosse
Wed Mar 31, 2021 4:24 pm
Forum: General Steamboat stuff
Topic: History of early steamboat navigation on the Missouri
Replies: 1
Views: 144

Re: History of early steamboat navigation on the Missouri

Thanks for posting this book, what a great read! Interesting to get a look at Indian and settler relations in the upper mid-west USA from an author in the late 19th century. Very different from the present presentations that cast a different light on this subject. My steamer, the Margaret S. is name...
by fredrosse
Sun Mar 14, 2021 4:50 am
Forum: Technical - Engines and Boilers
Topic: Steam engine from the North Caucasus
Replies: 98
Views: 13518

Re: Steam engine from the North Caucasus

Made some rough numbers for your steamboat project: Your compound engine, 3.9 in HP, 6.7 in LP, 5.2 in Stroke (100mm + 170mm x 132.5mm), running at 250 RPM, with 145 PSIG (10 Barg) Main Steam pressure, will produce about 12 horsepower, 9 Kilowatts shaft power. The boiler needs to make about 260 Poun...
by fredrosse
Sun Mar 14, 2021 1:43 am
Forum: Technical - Engines and Boilers
Topic: Removing boiler tubes
Replies: 23
Views: 1993

Re: Removing boiler tubes

"Why do you think that the tube sheets will deform more when pressurized from the inside of the gas path?" I do not know that this will occur, I was just entering a cautionary comment. The stress condition when the furnace is pressurized, and test pressure tends to put the tubes in tension is far di...
by fredrosse
Fri Mar 12, 2021 2:21 am
Forum: Technical - non Engines and Boilers
Topic: Best rpm for plunger pumps?
Replies: 11
Views: 829

Re: Best rpm for plunger pumps?

From Barts: "On the drawing you note that there's discharge on both upstroke and downstroke. I assume the latter is due to the difference in area above and below the piston?" ANS: Yes that is correct, with larger discharge volume on the upstroke. "In your design does the piston have an o-ring seal, ...
by fredrosse
Mon Mar 08, 2021 8:29 am
Forum: Technical - non Engines and Boilers
Topic: Best rpm for plunger pumps?
Replies: 11
Views: 829

Re: Best rpm for plunger pumps?

There are generally two pumps needed for a condensing plant that runs with vacuum exhaust. The condenser runs at vacuum, and "wet air pump" is used to bring the condensate out of the condenser, and send this water to the "hotwell storage tank", which is generally an open tank at atmospheric pressure...
by fredrosse
Sat Mar 06, 2021 7:34 pm
Forum: Technical - Engines and Boilers
Topic: Stiff 1" Everlasting 4000-A Everlasting 250psi Blowdown Valve
Replies: 6
Views: 560

Re: Stiff 1" Everlasting 4000-A Everlasting 250psi Blowdown Valve

Cyberbadger, good point about the locking valves, especially since they can so quickly be opened. If there is a chance that a novice passenger might open one, disaster could rapidly follow, depending on where the discharge lines are configured. Hot blowdown can be much more dangerous than live steam...
by fredrosse
Sat Mar 06, 2021 7:21 pm
Forum: Technical - non Engines and Boilers
Topic: Best rpm for plunger pumps?
Replies: 11
Views: 829

Re: Best rpm for plunger pumps?

The issues with reciprocating pump speed are very much complicated by several variables. The technical issues are generally to find a balance between suction check valve weight/inertia, which tends to impair rapid opening/closing, vs. the valve closure force, which fights against the valve being ope...