Search found 869 matches

by barts
Wed Apr 17, 2019 5:29 am
Forum: Technical - Engines and Boilers
Topic: Desuperheater question
Replies: 15
Views: 432

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: 9
Views: 413

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: 189

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: 9
Views: 413

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: 432

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: 432

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: 189

Re: British Rivet Manufacturers?

"England boiler rivets"

yields as first hit:

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

which seems appropriate.

- Bart
by barts
Sat Apr 06, 2019 4:20 am
Forum: Technical - Engines and Boilers
Topic: Desuperheater question
Replies: 15
Views: 432

Re: Desuperheater question

A radiant superheater is definitely subject to burnout if there's no steam going through it... so a hot (wood - not readily turned down) fire. I think your best solution when stopping the engine for a while is to 1) stop firing a while before if you can predict it. 2) open the firebox door and keep ...
by barts
Tue Feb 12, 2019 6:15 am
Forum: Technical - Engines and Boilers
Topic: Favourite cylinder lubrication
Replies: 14
Views: 918

Re: Favourite cylinder lubrication

I use the green velvet oil PB &J 460 but they seem to be out of business.

- Bart
by barts
Thu Jan 31, 2019 3:13 am
Forum: Technical - Engines and Boilers
Topic: What water speed do you work with in monotube boilers?
Replies: 5
Views: 354

Re: What water speed do you work with in monotube boilers?

Required water speed depends on tube diameter - you must have turbulent flow, which means a Reynolds number (dimensionless) of at least 4000 in a tube. This helps prevent overheating of the tube at very high firing rates. Note that this requires that there's water flowing through the tubes whenever ...