Search found 882 matches

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: 520

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: 849

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: 849

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: 1890

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: 1738

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: 1044

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...
by barts
Sun Apr 14, 2019 8:16 pm
Forum: General Steamboat stuff
Topic: A lovely engine with an interesting bit of history.
Replies: 11
Views: 1738

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

Here's another photo of her, I think:

http://www.maximan.nl/ouddelfzijl/diver ... 0Eems.html

But with a shorter stack - converted to oil?

There was another diesel tug w/ the same name built in 1938, so it's all a bit confusing.

- Bart
by barts
Sun Apr 14, 2019 7:33 pm
Forum: Technical - Engines and Boilers
Topic: Desuperheater question
Replies: 15
Views: 1890

Re: Desuperheater question

Thanks Fred, I completely forgot to mention the isolation valve.... I have one on all boiler connections (save the safety, of course!) on both boats. If my economizer fails (e.g. leaks) , I'll bypass it and leave it open - it's not going to get any more damaged :). I used a copper economizer for yea...
by barts
Sat Apr 13, 2019 10:38 pm
Forum: Technical - Engines and Boilers
Topic: Desuperheater question
Replies: 15
Views: 1890

Re: Desuperheater question

So the right order to plumb the feed side after the engine driven feed pump is: 1. Tee to float valve in hotwell so we bypass water from the hotwell back into the hotwell w/o heating it. 2. Lift check valve to keep steam (if any) formed in economizer out of the hotwell. 3. Pressure relief valve in c...
by barts
Fri Apr 12, 2019 3:36 am
Forum: Technical - Engines and Boilers
Topic: British Rivet Manufacturers?
Replies: 9
Views: 1044

Re: British Rivet Manufacturers?

"England boiler rivets"

yields as first hit:

http://www.sapphireproducts.co.uk/boiler.htm

which seems appropriate.

- Bart