Search found 1899 matches

by fredrosse
Mon May 08, 2023 5:02 am
Forum: Technical - non Engines and Boilers
Topic: Flotation
Replies: 11
Views: 14421

Re: Flotation

I have made a steam ejector out of one inch soldered copper tube fittimgs, with suction (standard one inch tee branch) about 1/2 inch above the bilge, and discharge 20 inches higher elevation into the paddlebox of the Margaret S. With a 0.1 inch steam nozzle @ 150 PSIG, 0.5 inch throat diameter, 10 ...
by fredrosse
Sun Feb 26, 2023 10:56 pm
Forum: Technical - Engines and Boilers
Topic: Building a Big Engine
Replies: 20
Views: 29129

Re: Building a Big Engine

"Have you see these folks?: https://www.emachineshop.com/" Yes, I have used this service to make tubesheets for my boiler, very good work. However their software cannot represent the valve sleeves. I tried to do this, even called their experts, and was told the feature of drilled passages in a tube ...
by fredrosse
Sun Feb 26, 2023 10:48 pm
Forum: Technical - Engines and Boilers
Topic: Building a Big Engine
Replies: 20
Views: 29129

Re: Building a Big Engine

somehow this wet air pump picture got lost in the last few posts.
by fredrosse
Sun Feb 26, 2023 10:39 pm
Forum: Technical - Engines and Boilers
Topic: Building a Big Engine
Replies: 20
Views: 29129

Re: Building a Big Engine

Boiler - Plenty of this size on E-bay, about 30 BHP (9 gal per hour fuel oil) at 50 PSIG. Boat - The hull may be from a converted sailboat or other displacement boat. Used hulls are quite cheap. Chris may just bite the bullet ans build the hull. 40 ft would be too short, but could be made to work. 6...
by fredrosse
Thu Feb 23, 2023 5:25 am
Forum: Technical - Engines and Boilers
Topic: Building a Big Engine
Replies: 20
Views: 29129

Re: Building a Big Engine

Eccentric, Iron Casting, 8 inch diameter.
by fredrosse
Thu Feb 23, 2023 5:24 am
Forum: Technical - Engines and Boilers
Topic: Building a Big Engine
Replies: 20
Views: 29129

Re: Building a Big Engine

Work on this big (13 x 27 Bore & Stroke) engine continues. We found heavy mechanical tubing, and Chris machined the main valve columns without outside contracting. Plenty of chips! Chris has made patterns and contracted many cast iron parts, photos show eccentric (8 inch diameter), air pump in progr...
by fredrosse
Wed Jan 11, 2023 12:32 pm
Forum: Members' Websites and Boats
Topic: Monotube Javelin
Replies: 40
Views: 121522

Re: Monotube Javelin

Sorry for the late reply. ASME Code rules do allow pipe sections, caps, reducers, etc to form a pressure vessel. To meet code there are many detailed rules, and to have a code stamped pressure vessel the fabrication must be performed by a "Code Shop", with calculations, material certifications, etc....
by fredrosse
Thu Dec 22, 2022 11:38 pm
Forum: Technical - Engines and Boilers
Topic: Towards Building a Steam Powered Outboard Motor
Replies: 53
Views: 62026

Re: Towards Building a Steam Powered Outboard Motor

Your rings may well be OK, for a small bore the rings are relatively more rigid than skinny rings on a much larger bore. Not something that is covered in my textbooks. I would however recommend a very slight edge treatment where the lapped bore surface mates at 90 degrees with the exhaust port passa...
by fredrosse
Wed Dec 21, 2022 2:26 am
Forum: Technical - Engines and Boilers
Topic: Towards Building a Steam Powered Outboard Motor
Replies: 53
Views: 62026

Re: Towards Building a Steam Powered Outboard Motor

I remember porting the exhaust passages on two stroke Go-Kart engines many years ago. Engines generally had circular exhaust ports, and we would try to make them into square ports for better engine breathing. A common problem if the ports were re-shaped to actually approach exhaust ports with horizo...
by fredrosse
Wed Dec 21, 2022 1:52 am
Forum: Welcome
Topic: New Member
Replies: 6
Views: 3489

Re: New Member

Nice boat, should make a good steamer. Where are you?