Search found 714 matches

by Mike Rometer
Wed Apr 17, 2019 7:42 pm
Forum: General Steamboat stuff
Topic: A lovely engine with an interesting bit of history.
Replies: 9
Views: 412

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

Lopez Mike wrote:
Wed Apr 17, 2019 6:44 pm
Which brings up another question. Since cutting down the reciprocating mass is generally a good idea, how about aluminum pistons? It's been a lifetime since I.C. engines used cast iron.
Already made some for my twin. If I can ever find some time to get back to it. :roll: :roll:
by Mike Rometer
Sun Mar 31, 2019 10:21 pm
Forum: Technical - Engines and Boilers
Topic: Opposed Piston Engine Project - The Steam Version
Replies: 35
Views: 1539

Re: Opposed Piston Engine Project - The Steam Version

"Will the steam not have to expand at twice the usual rate" ANS: Not really, the piston(s) displacement, whatever it is, will still fully occur over 180 degrees of crank rotation, no different from a conventional engine running if at the same RPM as the one illustrated here. The difference is that ...
by Mike Rometer
Sun Mar 31, 2019 10:21 pm
Forum: Technical - Engines and Boilers
Topic: Opposed Piston Engine Project - The Steam Version
Replies: 35
Views: 1539

Re: Opposed Piston Engine Project - The Steam Version

"Will the steam not have to expand at twice the usual rate" ANS: Not really, the piston(s) displacement, whatever it is, will still fully occur over 180 degrees of crank rotation, no different from a conventional engine running if at the same RPM as the one illustrated here. The difference is that ...
by Mike Rometer
Sat Mar 30, 2019 11:13 pm
Forum: Technical - Engines and Boilers
Topic: Opposed Piston Engine Project - The Steam Version
Replies: 35
Views: 1539

Re: Opposed Piston Engine Project - The Steam Version

Random thought, having watched the motion on that. Will the steam not have to expand at twice the usual rate? Would that not cause a much more rapid temperature drop and therefore greater condensation in the cylinder? 'Tis only a late night thought, and I could be totally up a gum tree. Off to bed!
by Mike Rometer
Fri Mar 29, 2019 9:43 pm
Forum: Technical - Engines and Boilers
Topic: digital steam engine indicator
Replies: 62
Views: 28878

Re: digital steam engine indicator

Basicaly, the ones I've seen are a ring round the crank with 36 notches the one at TDC is larger as calibrator. The notches are read by a small coil with a magnetic core. Don't ask about the attatched electronics, that's beyond my ken, but I believe they can calculate the crank position to better th...
by Mike Rometer
Fri Mar 29, 2019 7:37 pm
Forum: Technical - Engines and Boilers
Topic: digital steam engine indicator
Replies: 62
Views: 28878

Re: digital steam engine indicator

Crankshaft rotation/postion sensing is nothing new or difficult on motor vehicles. The usual method is a magnetic reluctor. If it can be done for 1000s of rpm 100s shouldn't be too hard.
by Mike Rometer
Thu Mar 28, 2019 9:47 am
Forum: Welcome
Topic: small steam engine?
Replies: 11
Views: 501

Re: small steam engine?

It has to be said that there is nothing quite like the charm of steam, particularly on the water. For 14 ft you probably won't need as much as 5 HP with steam. Something like a Stuart 5a single should do it. Those are available as a kit of castings requiring machining, there may even be a stockist s...
by Mike Rometer
Sat Mar 09, 2019 9:57 am
Forum: Technical - non Engines and Boilers
Topic: Wheel sizes ?
Replies: 19
Views: 1443

Re: Wheel sizes ?

My thoughts are, that whilst the spring may not be truly necessary for tension it will provide some protection, both to hand and steering gear, in the event of rudder collision with some unseen underwater obstruction.
by Mike Rometer
Tue Feb 26, 2019 7:29 pm
Forum: Welcome
Topic: Hello from Massachusetts!
Replies: 30
Views: 1129

Re: Hello from Massachusetts!

Mike - If you do make it back in the area and it’s not an official opening day for the museum you can always reach out and request a tour and one of the docents can likely accommodate. Just something to keep in mind! Yeah, we came for the 'leaves' and were probably about a week too early, so the ph...
by Mike Rometer
Mon Feb 25, 2019 3:50 pm
Forum: Welcome
Topic: Hello from Massachusetts!
Replies: 30
Views: 1129

Re: Hello from Massachusetts!

Mike, you absolutely need to take a visit to both. The steam Up events at the Wireless and Steam Museum (https://newsm.org) and the Wooden Boat and Antique Marine Engine shows at Mystic Seaport are must attend events if they fit into your schedule (https://www.mysticseaport.org). Both museums have ...