Search found 97 matches

by TriangleTom
Fri May 22, 2020 9:04 pm
Forum: Technical - Engines and Boilers
Topic: 2.5mm Oil/Kerosene Nozzles
Replies: 5
Views: 230

Re: 2.5mm Oil/Kerosene Nozzles

A ball valve for a quick fuel shutoff is imperative. It only takes a few seconds of flameout to have an explosive mixture in the firebox that can wreak havock on the boiler casing (water tube boilers like the mishap on Jim Webster's "Souvenir") or blow the firebox door open and shoot the spark arre...
by TriangleTom
Fri May 01, 2020 5:23 pm
Forum: General Steamboat stuff
Topic: Old video on a Steam Tug
Replies: 23
Views: 3364

Re: Old video on a Steam Tug

Given the relatively short ranges of these supercavitating torpedoes, I would not be surprised if they are intended only for defensive use at close range, in which case you've probably already been discovered so stealth isn't important. Sort of the same philosophy as submarine launched antiaircraft ...
by TriangleTom
Wed Apr 29, 2020 5:48 pm
Forum: General Steamboat stuff
Topic: Old video on a Steam Tug
Replies: 23
Views: 3364

Re: Old video on a Steam Tug

Above a certain speed and above a certain depth, a torpedo hits a limit of usability due to cavitation noise. Not just the prop but the torpedo itself moving through the water. Say we are thinking about firing at a surface ship. Even if we have the shot stay deep until relatively late in the run, t...
by TriangleTom
Thu Apr 23, 2020 6:07 pm
Forum: General Steamboat stuff
Topic: Oh! No! BSOD!
Replies: 8
Views: 1155

Re: Oh! No! BSOD!

I'm also going to have to recommend LibreCAD for Linux. It's been a few years since I've used it, but I remember it being pretty good for what it was.
by TriangleTom
Wed Apr 22, 2020 4:26 pm
Forum: General Steamboat stuff
Topic: Oh! No! BSOD!
Replies: 8
Views: 1155

Re: Oh! No! BSOD!

Fred- If your machine shop is anything like my employer, they're probably going to ask for a STEP or IGES file from you. Your best option would probably be to download the free edition of Autodesk Fusion360. This will let you create the components you need and export them as one of the filetypes men...
by TriangleTom
Wed Apr 22, 2020 2:09 pm
Forum: General Steamboat stuff
Topic: Oh! No! BSOD!
Replies: 8
Views: 1155

Re: Oh! No! BSOD!

Are you looking for 2D or 3D CAD for Linux?
by TriangleTom
Thu Apr 16, 2020 12:10 am
Forum: General Steamboat stuff
Topic: Carrying a steam ship across Africa
Replies: 7
Views: 1222

Re: Carrying a steam ship across Africa

Interesting. I never knew that. Is the film based on a book? I would love to read more about that story. Yes it was! The African Queen was written in 1935 by CS Forester. https://en.wikipedia.org/wiki/The_African_Queen_(novel) And interestingly, you can take a ride on her today if you ever find you...
by TriangleTom
Sat Apr 11, 2020 4:44 am
Forum: Technical - Engines and Boilers
Topic: Interesting Regenerative Firebox Design
Replies: 11
Views: 1669

Re: Interesting Regenerative Firebox Design

I can't speak to everything, but: A: The back of my envelope says that with a diesel burner, a 150 degree F temperature increase of the incoming air would result in a roughly 2% decrease in fuel consumption. With that said, that's assuming a perfectly stoichiometric mixture so it would probably be a...
by TriangleTom
Sat Apr 11, 2020 12:43 am
Forum: Technical - Engines and Boilers
Topic: Interesting Regenerative Firebox Design
Replies: 11
Views: 1669

Interesting Regenerative Firebox Design

I saw this design for a regenerative hearth design drawn up by a blacksmith on Reddit https://i.imgur.com/3ZfpmIu.jpg and I think it would have a lot of interesting possibilities as a firebox, especially under forced draft. The addition of the integrated heat exchanger for combustion air preheat see...
by TriangleTom
Tue Apr 07, 2020 10:46 pm
Forum: General Steamboat stuff
Topic: Antidote to Cabin Fever?
Replies: 55
Views: 6038

Re: Antidote to Cabin Fever?

"Would there be enough clearance for a 12x12 prop?" The software I have indicated the 12 x 12 prop (300mm x 300mm) at 500 RPM as approximately ideal, but the actual hull configuration is much more suited to a 9 or 10 inch (225 - 250mm) prop diameter, about 80% of the ideal diameter. No big sacrific...