Search found 886 matches

by barts
Tue Jun 02, 2020 3:04 pm
Forum: Technical - non Engines and Boilers
Topic: How to chose gear wheels respective to torque?
Replies: 5
Views: 413

Re: How to chose gear wheels respective to torque?

Hi Steam Captain - Note that gear train (gears meshing together to transmit power) design can be tricky, esp. when running at engine speeds and transmitting significant power. As a result, most people use completely enclosed gear boxes designed as a unit for such service. For tasks such as driving p...
by barts
Sat Apr 18, 2020 5:07 am
Forum: Technical - Engines and Boilers
Topic: Bearings !
Replies: 4
Views: 1197

Re: Bearings !

You might take a look at PV values for your bearings; so long as you're within the safe values for the bearing materials and the supply of oil is adequate, these will likely be ok. Extra clearance causes noise pretty quickly, of course. The little ends are tricky, with very little motion to set up a...
by barts
Sat Apr 11, 2020 7:49 pm
Forum: Technical - Engines and Boilers
Topic: Interesting Regenerative Firebox Design
Replies: 11
Views: 1926

Re: Interesting Regenerative Firebox Design

Preheating combustion air does the following: * increases flame temperature; this may reduce smoke as well. * increases boiler efficiency about 1% for every 40F increase in combustion air temperature if the heat is scavenged from the exhaust. Combustion air preheating is used basically on all large ...
by barts
Sun Mar 15, 2020 9:36 pm
Forum: Technical - Engines and Boilers
Topic: Quad versus twin compound
Replies: 12
Views: 4394

Re: Quad versus twin compound

... A V-belt is quiet and easily slacked with an idler wheel. Or I could arrange some sort of mechanism whereby opening the fire door closes a damper in the duct from the fan to the ash pan. Or both. ... My stack blower uses quite a bit of water and some more sustainable way to get a few more r.p.m...
by barts
Thu Jan 02, 2020 9:04 pm
Forum: Technical - non Engines and Boilers
Topic: Electrical system for boat
Replies: 35
Views: 12661

Re: Electrical system for boat

Still a work in progress though, I need to sort out a governor for it as it can only deal with steady loads at the moment, i.e. lighting and battery charging. I'd definitely use a battery to help regulate the output of your generator as the output voltage is likely to shoot up if the load decreases...
by barts
Tue Oct 22, 2019 1:53 am
Forum: Technical - non Engines and Boilers
Topic: Depth Sounders?
Replies: 7
Views: 3142

Re: Depth Sounders?

I wouldn't get too worried. Otter's prop has been 'hanging low' w/o even a preceding skeg for the almost 30 years she's been steaming. Yes, I've grounded the prop on a rock a time or two, but nothing really bad that a bit of light filing didn't clean up. I do stand and slow down when steaming in sha...
by barts
Sun Oct 13, 2019 4:17 pm
Forum: Technical - Engines and Boilers
Topic: Lune Valley Burner
Replies: 1
Views: 1691

Re: Lune Valley Burner

I think that valve mechanism is designed to control fuel flow while maintaining a relatively constant jet velocity, and providing a needle type orifice that can be cleared by cycling the valve. The construction isn't clear, but I'd guess the vertical needle has a slot that is engaged by a fork threa...
by barts
Wed Aug 21, 2019 5:51 am
Forum: Technical - non Engines and Boilers
Topic: Electrical system for boat
Replies: 35
Views: 12661

Re: Electrical system for boat

To make boiler nipples removable, use neverseize. There's one w/ PFTE specifically called out for steam piping. Teflon tape works as well, but the goop is better. RectorSeal #5 is similar - I've had no troubles removing boiler nipples after 10 years. To prevent corrosion, paint fittings with moistur...
by barts
Tue Aug 20, 2019 6:45 am
Forum: Technical - non Engines and Boilers
Topic: Electrical system for boat
Replies: 35
Views: 12661

Re: Electrical system for boat

If you're interested in more of a period piece, there are various articles on the net about making slow speed generators for wind turbine use. These could support direct drive from our steam engines; some skill w/ electronics would be needed to properly regulate the output, but this could look very ...
by barts
Sun Aug 18, 2019 1:54 am
Forum: Technical - non Engines and Boilers
Topic: Electrical system for boat
Replies: 35
Views: 12661

Re: Electrical system for boat

If you have a rigid canopy, solar panels make a lot of sense if your climate isn't too sunless. A couple of 100w panels and you're set. Large boats fit alternators, but I've seen those only on 35-40 footers. Most small boats just pack enough battery to last a weekend. Rainbow, our 26' ex-Navy whaleb...