Search found 956 matches

by barts
Mon Jun 14, 2021 3:19 pm
Forum: Technical - non Engines and Boilers
Topic: Best rpm for plunger pumps?
Replies: 18
Views: 1589

Re: Best rpm for plunger pumps?

Wish I could get my hot well temps up to hot tub numbers. If I size my condenser for hard running, it is too big for piddling around. I have thought of having two keel condensers in parallel with a valve to block one off when running on a slow bell. Better ideas anyone? The only reason to keep the ...
by barts
Mon Jun 14, 2021 4:10 am
Forum: Technical - non Engines and Boilers
Topic: Building Spiffy
Replies: 18
Views: 458

Re: Building Spiffy

Hi Mike - Very nice - glad to see you're making progress. It's going to be an really nice boat. Since it was raining today, I spent much of the day actually working on Rainbow in my dad's barn, inspired by your call this morning. I really look forward to getting our new shop built so I can find the ...
by barts
Mon Jun 14, 2021 4:00 am
Forum: Technical - non Engines and Boilers
Topic: Best rpm for plunger pumps?
Replies: 18
Views: 1589

Re: Best rpm for plunger pumps?

140F is pretty hot - you'll burn yourself if you need to get into the hotwell. I'd keep it at hot tub temps or maybe a bit warmer. ? The condensate will be the temperature it will be, if the equipment cant handle it then it's the wrong piece of equipment. -CB Your feed pump will cavitate if your fe...
by barts
Sun Jun 13, 2021 12:05 am
Forum: Technical - non Engines and Boilers
Topic: Best rpm for plunger pumps?
Replies: 18
Views: 1589

Re: Best rpm for plunger pumps?

What models of hypro piston pumps are you folks using? When I look at the specifications the max temp is 140F for most of the models I saw. Also some of these have leather cups, or rubber cups, I assume those don't work? I'm looking for something to take hot condensate from a tank and pump it into ...
by barts
Fri Jun 04, 2021 10:16 pm
Forum: Technical - non Engines and Boilers
Topic: Large Steam Whistle
Replies: 1
Views: 186

Re: Large Steam Whistle

https://patents.google.com/patent/US48921 shows a two bell version. A four bell whistle along the same idea is an obvious extrapolation.

- Bart
by barts
Wed Jun 02, 2021 3:55 pm
Forum: Technical - non Engines and Boilers
Topic: Ignorance Exposed
Replies: 18
Views: 910

Re: Ignorance Exposed

A ex-cannery tender up here has a big Washington Ironworks diesel - 100 hp at 350 rpm. The prop is 5'x5'. When docking, a turn or so (using the planetary gear) at idle forward and backward will walk her towards the dock. For slow speed and heavy work, a big prop is exactly what is needed.

- Bart
by barts
Mon May 31, 2021 11:45 pm
Forum: Technical - Engines and Boilers
Topic: Thinking of building a steam engine
Replies: 2
Views: 294

Re: Thinking of building a steam engine

Hi Mike - I've been clearing land for the new shop... chainsaw & tractor work. I've cut and stacked 4' rounds from a bunch of trees; I've got steamboat fuel for years - several cords worth. Excavator should show tomorrow. I converted a twin cylinder refrigeration compressor 2 x 2.5" and ran it in my...
by barts
Mon May 31, 2021 11:07 pm
Forum: Technical - non Engines and Boilers
Topic: Ignorance Exposed
Replies: 18
Views: 910

Re: Ignorance Exposed

More bites per minute vs the old valve. Significant increase in RPM at wide open throttle (30-50+) vs with conventional valve. Boiler was almost at the limit before with current burners. As long as Holman's throttle man can be disciplined with the throttle, not much of an issue... Yup... a steam en...
by barts
Thu May 27, 2021 9:14 pm
Forum: Technical - Engines and Boilers
Topic: Service bolt in the cylinder cover
Replies: 8
Views: 508

Re: Service bolt in the cylinder cover

Since the oil in the cylinder will end up in the condenser and hotwell, something easy to remove is best (e.g. not compounded - no animal fats). However, compounded oils stick best, and are easy (600W) to obtain in 5 gallon pails. The latter is also an excellent lube for indexing heads, etc. Absent ...
by barts
Thu May 27, 2021 6:23 am
Forum: Technical - non Engines and Boilers
Topic: Ignorance Exposed
Replies: 18
Views: 910

Re: Ignorance Exposed

Ron, It can't be quite true that the torque is constant. If that were the case then we could get any power we wished by just turning the engine at a higher r.p.m. There are unavoidable flow losses in the ports as r.p.m. increases for instance. It IS true that the torque stays quite constant down to...