Search found 86 matches

by SL Ethel
Thu Dec 22, 2016 2:36 pm
Forum: Welcome
Topic: Newbie now has hull for "just an engine"
Replies: 16
Views: 16839

Re: Newbie now has hull for "just an engine"

Beautiful little hull you have found. I'm sure that a 5A will push it around reasonably well. You won't pull any water skiers, but presumably that wasn't on the agenda anyway. You might want to take a look at a couple of articles in "Steamboats and Modern Steam Launches" (re-print to be had from Ell...
by SL Ethel
Wed Mar 23, 2016 7:07 pm
Forum: Technical - Engines and Boilers
Topic: Sea Lion Engine build
Replies: 69
Views: 66998

Re: Sea Lion Engine build

You might want to think twice about 212 degree exhaust steam as a cylinder jacket as opposed to 300+ for boiler pressure steam- it will likely do more harm than good. Have a look at Prof. Stumpf's book (available free on google books) - it gives a very thorough thermodynamic overview of what's going...
by SL Ethel
Sat Jan 09, 2016 4:03 am
Forum: Sales and Trade
Topic: Hadden Uniflow casting set for sale
Replies: 4
Views: 13323

Re: Hadden Uniflow casting set for sale

Well, Ron, I've put in a bid on your castings. It looks like a really neat little engine.

Cheers,
Scott
by SL Ethel
Sun Dec 13, 2015 4:05 pm
Forum: Technical - non Engines and Boilers
Topic: Prop re-pitching
Replies: 11
Views: 17506

Re: Prop re-pitching

The video is fantastic - that lets me know that what I want to do is at least technically feasible. My thought was to heat the prop just the way the gentleman in the video does it, but to have the hub and blade held firmly in a jig that would control the amount of twist fairly precisely. My prop is ...
by SL Ethel
Sun Dec 13, 2015 3:50 pm
Forum: Members' Websites and Boats
Topic: My New Launch
Replies: 14
Views: 18862

Re: My New Launch

I call or email the good folks at Myers every couple of years as well, in hopes of convincing them do do another run of castings. Are there many more people out there who are hoping for a set of those castings? Perhaps if we could put together a firm order for several sets, it might inspire them to ...
by SL Ethel
Thu Sep 17, 2015 4:12 am
Forum: Technical - non Engines and Boilers
Topic: Prop re-pitching
Replies: 11
Views: 17506

Prop re-pitching

Has anybody on the list successfully re-pitched his or her own prop? I have an 18x23 motor boat prop (bronze) with lots of blade area. Currently I have the engine geared up to spin it about 1.3x engine speed, but would much rather have more pitch at lower rpm, especially since I have all that blade ...
by SL Ethel
Fri May 08, 2015 10:03 pm
Forum: Technical - Engines and Boilers
Topic: Operating pressure
Replies: 19
Views: 17112

Re: Operating pressure

Easy diagnostic test for your injector: put a piece of hose on the overflow and stick the hose end in a bucket of water when you try the injector. There should be no bubbles. If you see bubbles, you are getting air in the suction side, and these injectors will not run with even a tiny air leak. It s...
by SL Ethel
Tue Jan 06, 2015 4:28 am
Forum: Technical - non Engines and Boilers
Topic: Hand pump for boiler feedwater
Replies: 32
Views: 31450

Re: Hand pump for boiler feedwater

From memory, I think it's around 1.5" bore (it's out of state in winter storage at the moment). The handle is cast aluminium, and long enough to provide leverage for pretty intensive usage at 80 or 100 PSI. It's supposed to be good for 500. That seems a bit much, but I can testify to 250 being no pr...
by SL Ethel
Tue Jan 06, 2015 2:37 am
Forum: Technical - non Engines and Boilers
Topic: Hand pump for boiler feedwater
Replies: 32
Views: 31450

Re: Hand pump for boiler feedwater

http://www.neptunepump.com/pt-pump.html This is the pump you want. It is very similar (maybe identical?) to what Beckman sells. Mine cost $300 (for the bronze version) from Neptune about 8 years ago. It's a big pump, both in dimensions and capacity, and it works beautifully. I have steamed my 3x4 si...
by SL Ethel
Fri Nov 07, 2014 4:55 pm
Forum: Technical - Engines and Boilers
Topic: Burst Disc/Burst diaphragm/Rupture Disc Pressure Safety
Replies: 17
Views: 16190

Re: Burst Disc/Burst diaphragm/Rupture Disc Pressure Safety

What about running the discharge from the rupture disc into the firebox? As long as the disc and piping are small enough that the steam volume wouldn't be another major hazard in itself, this might assist in quenching/smothering the fire as it empties the boiler, perhaps preventing overheat damage t...