Search found 898 matches

by barts
Sat Sep 11, 2010 5:59 pm
Forum: Technical - Engines and Boilers
Topic: Throttle valves?
Replies: 14
Views: 8723

Re: Throttle valves?

Our Otter uses a 1/2" angle globe valve as a main steam stop valve, and a strainer w/ wire mesh to remove any scale, etc, carry-over that would damage slide valves, etc.... and the throttle valve is a 1/2" angled bronze globe valve w/ a metal-metal seat. this combo works very well.

- Bart
by barts
Thu Jan 21, 2010 4:44 am
Forum: Technical - Engines and Boilers
Topic: What's new or old with lagging?
Replies: 8
Views: 5081

Re: What's new or old with lagging?

87gn@tahoe wrote:Another method is using rope, wraped with fabric soaked in aribel (sp?)
The stuff you're thinking of was Arabol.... as far as I know, it's no longer manufactured. There are lots
of substitutes....

- Bart
by barts
Sun Jan 17, 2010 6:38 pm
Forum: General Steamboat stuff
Topic: Shamrock Restoration Appeal
Replies: 10
Views: 29907

Re: Shamrock Restoration Appeal

Aside: Does paypal work in the U.K.? They would do well to set that up...

- Bart
by barts
Sun Jan 17, 2010 6:34 pm
Forum: Technical - Engines and Boilers
Topic: What's new or old with lagging?
Replies: 8
Views: 5081

Re: What's new or old with lagging?

Painted rope works well enough to keep me from getting burned, and there's something about a steam line with Turk's heads at the ends, all spiffy and white.... Barbie (my wife) does all the knot work on Otter. Around here, woven fiberglass tape for insulation is a little more difficult to find, and ...
by barts
Sat Jan 16, 2010 6:59 am
Forum: Technical - Engines and Boilers
Topic: What's new or old with lagging?
Replies: 8
Views: 5081

Re: What's new or old with lagging?

For non-superheated steam pipes - cotton rope, painted with travel trailer roofing goo (a white rubbery compound). For manifold and weldments to complex to cover w/ rope, I use a moldable paste insulation and cover it after it dries with fabric strips soaked in lagging adhesive or that roofing patch...
by barts
Sun Jan 10, 2010 5:41 pm
Forum: Technical - Engines and Boilers
Topic: Neat Site
Replies: 5
Views: 4171

Re: Neat Site

That's a nice engine and some interesting machining techniques. I note that Al is using aluminium pistons. This will keep the reciprocating weight down, but somehow I had a notion that iron should be used with steam. Anyone? John Aluminum works fine for steam engine pistons at traditional pressures...
by barts
Tue Jan 05, 2010 3:53 am
Forum: Technical - non Engines and Boilers
Topic: Steaming Sail boats or steamboats with sails!
Replies: 10
Views: 8455

Re: Steaming Sail boats or steamboats with sails!

On a larger boat, an evaporator is simple enough to rig... you can heat it via a steam coil. Rig a
modified pressure regular to keep from exceeding 30 psi in the evaporator; otherwise the salts
form a hard crust.

- Bart
by barts
Sat Jan 02, 2010 9:37 pm
Forum: Technical - non Engines and Boilers
Topic: Steaming Sail boats or steamboats with sails!
Replies: 10
Views: 8455

Re: Steaming Sail boats or steamboats with sails!

Hmmm my experience sailing in the San Juans is that the winds are far more fickle than my boiler & power plant :lol: The design trade-offs (space, shape of hull, etc) needed for successful sail propulsion are substantial... you're better off squirreling a small outboard in a locker and using that if...
by barts
Tue Dec 29, 2009 12:22 am
Forum: FAQ
Topic: Steering a boat - the options
Replies: 4
Views: 8496

Re: Steering a boat - the options

You left out a very handy option for smaller boats - the push-pull tiller, as you would see on a sailing dingy.... mine is a tapered 3' piece of oak fastened with a shop made bronze & stainless swivel to a lever arm on the rudder shaft: inexpensive & simple, doesn't whack people upside the head. Thi...
by barts
Sun Dec 27, 2009 9:07 pm
Forum: FAQ
Topic: Propeller Pitch - what it means and choosing the right one
Replies: 13
Views: 20618

Re: Propeller Pitch - what it means and choosing the right one

I have a copy of David Gerr's Propeller Handbook - it is indeed excellent. Some rules of thumb for steam boat designs from various places (displacement hulls, low power): 1) Use the largest possible propeller diameter that will fit the hull. 2) try for a 1:1 diameter pitch ratio if possible - it's t...