Search found 876 matches

by barts
Thu Jun 27, 2019 5:49 am
Forum: Technical - Engines and Boilers
Topic: Burning corn as fuel?
Replies: 8
Views: 471

Re: Burning corn as fuel?

It's certainly possible, of course. However, the cost of the fuel (unless you've got a pretty big boat) is a tiny part of the expenses of maintaining a boat, and it's not trivial getting pellet fuels to burn at the desired rate, esp. w/o forced draft. Rats would pose a problem - a ship's cat might b...
by barts
Wed Jun 26, 2019 1:55 am
Forum: Technical - Engines and Boilers
Topic: Gas-fired LaMont boiler
Replies: 12
Views: 775

Re: Gas-fired LaMont boiler

When I wound the 1/2" (~13 mm) tubing for Otter's boiler, I filled the tubes w/ sand. For very small tubes, you might want to consider Cerro bend or other very low melting point (below 100 C) metal alloys to prevent tube collapse.

- Bart
by barts
Sun Jun 23, 2019 10:02 pm
Forum: Technical - Engines and Boilers
Topic: Oil burner consumption
Replies: 29
Views: 956

Re: Oil burner consumption

If you know how many lbs/hour of wood your plant consumes, you can easily calculate estimated oil consumption. https://mha-net.org/docs/v8n2/docs/WDBASICS.pdf Assuming about 7000 btu/lb of air dried wood and 140k btu/gallon of diesel and 7 lbs of diesel/gallon, Estimated burn of 40 lbs of wood/hour ...
by barts
Sun Jun 23, 2019 9:49 pm
Forum: Technical - Engines and Boilers
Topic: Cladding Problem - Need Advice
Replies: 6
Views: 473

Re: Cladding Problem - Need Advice

The exhaust steam temperature is going to be determined by the number of expansions of the steam. If your engine was running at 100% cut-off, the exhaust steam would be at a temperature determined by the constant-heat expansion (same as a throttling valve) of the input steam. 150 psi saturated steam...
by barts
Tue Jun 18, 2019 1:43 pm
Forum: Technical - Engines and Boilers
Topic: Best (Easiest) method to check dissolved oxygen levels in make up water.
Replies: 2
Views: 221

Re: Best (Easiest) method to check dissolved oxygen levels in make up water.

Hi Captain Mack - I've never seen anyone do this on our small steamboat boilers, but you've got one larger than most and it's used more than most. I'd probably go with an meter, but there are regents as well that one can use to do a visual color comparison, as well as a traditional titration procedu...
by barts
Thu May 16, 2019 2:31 am
Forum: Technical - non Engines and Boilers
Topic: Clinker down to bare wood What do I do next?
Replies: 3
Views: 548

Re: Clinker down to bare wood What do I do next?

Mike is absolutely right - the most durable finish for a stripped carvel/lapstrake boat is paint - something not too hard. Polyurethanes are subject to cracking due to moisture changes in the wood. If you want clear and you are building a epoxy sealed hull (inside & out), then varnish over epoxy is ...
by barts
Wed May 15, 2019 1:54 am
Forum: Technical - non Engines and Boilers
Topic: Clinker down to bare wood What do I do next?
Replies: 3
Views: 548

Re: Clinker down to bare wood What do I do next?

Varnish over bare wood is pretty high maintenance. Epoxy will of course need varnish or polyurethane over it to protect against UV. You may wish to consider Cetol Marine. My brother uses this product on the trim on his 42' ketch with excellent results. https://www.sailmagazine.com/diy/cetolan-altern...
by barts
Wed Apr 17, 2019 5:29 am
Forum: Technical - Engines and Boilers
Topic: Desuperheater question
Replies: 15
Views: 1121

Re: Desuperheater question

I used an old copy of John Perry's Chemical Engineering Handbook (4th edition) I got for free while I was doing a lot of design stuff; they had pressure vessel details, piping design, joint design details, etc from ASME standards, and the price was right - free. They're available on Ebay for $30 or ...
by barts
Wed Apr 17, 2019 5:11 am
Forum: General Steamboat stuff
Topic: A lovely engine with an interesting bit of history.
Replies: 11
Views: 1057

Re: A lovely engine with an interesting bit of history.

That is a really nice engine... If I made one of those rods, I think I'd start with a piece of flat, center drill the ends, rough turn down the center, and then heat and twist it so I didn't have to whittle a great big piece down....

- Bart
by barts
Wed Apr 17, 2019 4:48 am
Forum: Technical - Engines and Boilers
Topic: British Rivet Manufacturers?
Replies: 9
Views: 585

Re: British Rivet Manufacturers?

Our Airstream trailer is held together w/ aluminum rivets - the sort with the rounded heads that need access from both sides. Learning to drive those was fun. I remember going over age-hardening rivets for aircraft in mechanical design courses at the university - you keep the rivets in a refrigerato...