Author Topic: PM Research Engine Number 1  (Read 31122 times)

Offline mikehinz

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Re: PM Research Engine Number 1
« Reply #330 on: November 14, 2021, 08:38:44 PM »
It certainly sounds better to me and it seems to run smoother.  The 'chuffs' are more even now. 

Great job!

Mike
MIke
Wichita, KS, USA

Offline Don1966

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Re: PM Research Engine Number 1
« Reply #331 on: November 14, 2021, 08:42:25 PM »
Awesome . :ThumbsUp:



 :cheers:
Don

Offline Kim

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Re: PM Research Engine Number 1
« Reply #332 on: November 14, 2021, 11:43:45 PM »
That's a beautiful engine, Stuart!

Lovely runner.  And I like the blue color.  Very nice.

Kim

Offline Sleddog

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Re: PM Research Engine Number 1
« Reply #333 on: November 15, 2021, 11:30:53 AM »
Congratulations Stuart. Beautiful engine & runner. I enjoyed following along. Whats next?

Online propforward

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Re: PM Research Engine Number 1
« Reply #334 on: November 15, 2021, 01:33:57 PM »
Thanks all, very much appreciate your kind comments.

Well, next up is a sort of refrubishment of my lathe. I want to beef up the cabinets it is sitting on, replace the spindle and other bearings with higher quality American made bearings, re route the coolant hose and add a DRO. DRO arrives today! So that will be a fairly major project - I have two pieces of 1" thick steel plate to put on top of the cabinets and give it a firmer surface to sit on - hopefully take the "bounce" out.

In parallel with that, I'm planning to start this:



A PM Research number 4 - a bit of a bigger beastie. 1-1/2" bore, 2-12/" stroke. It's not a very "fancy" looking engine in a lot of ways, but is a decent size so should look impressive. I've read a few build logs that give me some good insight in how to proceed.  :ThumbsUp:
Stuart

Forging ahead regardless.

Offline gary.a.ayres

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Re: PM Research Engine Number 1
« Reply #335 on: November 15, 2021, 02:01:16 PM »
Oh wow.... that PMR is a beauty! I look forward to following your build log on that, not least because I have the castings for the #6 as yet untouched.

Also the lathe upgrade sounds great.

 :popcorn: :popcorn: :popcorn:

Offline Dave Otto

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Re: PM Research Engine Number 1
« Reply #336 on: November 16, 2021, 12:06:14 AM »
Nicely done Stuart!
She looks and runs real nice.

Dave

Online propforward

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Re: PM Research Engine Number 1
« Reply #337 on: June 25, 2022, 07:47:43 PM »
Some video footage from today, running on live steam. I was loaned an electric boiler, which was originally used on an autoclave for sterilizing medical instruments. Anyway, plenty of capacity for this.

<a href="https://www.youtube.com/watch?v=AC-4Nzc0ffE" target="_blank">http://www.youtube.com/watch?v=AC-4Nzc0ffE</a>

The slower running happens in the final third of the video. The engine doesn't run very slow, but I'm happy with it. So much more fun running on steam!

Anyway, there we are, now to blow it out and oil it thoroughly.
Stuart

Forging ahead regardless.

Offline Grateful Ted

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Re: PM Research Engine Number 1
« Reply #338 on: June 25, 2022, 11:47:03 PM »
Thanks for sharing this, very entertaining running on steam.
It sure is a good runner, and quite striking in blue.

Offline Kim

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Re: PM Research Engine Number 1
« Reply #339 on: June 25, 2022, 11:57:40 PM »
Great video!  It is really fun watching it run on steam!  :ThumbsUp: :popcorn:

Kim

Online propforward

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Re: PM Research Engine Number 1
« Reply #340 on: June 26, 2022, 12:21:55 AM »
Thanks guys - really enjoyed this today. Steam everywhere, lovely sound, and that smell of hot steam oil! Great fun. The video is a bit long, but I was having fun.
Stuart

Forging ahead regardless.

Offline Admiral_dk

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Re: PM Research Engine Number 1
« Reply #341 on: June 26, 2022, 10:27:34 AM »
As mentioned - it has a very nice and realistic speed / apperance in the later part of the Video  :ThumbsUp:

You should be very happy with this - good that you had fun running it on steam  :cheers:

Per

Offline gary.a.ayres

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Re: PM Research Engine Number 1
« Reply #342 on: June 26, 2022, 10:16:53 PM »
Wow!

Great to see the engine running on steam, as a steam engine is supposed to.

Excellent job Stuart.

 :ThumbsUp:

gary

Offline Grateful Ted

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Re: PM Research Engine Number 1
« Reply #343 on: June 27, 2022, 12:55:39 AM »
I set up my trusty old PMR #3bi next to the video of the PM1 and tried to match piston cycles & crosshead movement & flywheel & eccentric revs.
I know PMR#3 & PMR#1 are like apples & oranges in size.
But, with my cheap laser Tach I came up with 525 rpm at beginning of video, and 275 rpm at slow speed at the end.
This is plus or minus a bit.
Does this sound about right?

Online propforward

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Re: PM Research Engine Number 1
« Reply #344 on: June 27, 2022, 01:26:31 PM »
Hi Ted,

I haven't attempted to count revs yet. I want to fire it up one more time later this week, so I'll make a rough count then. You're probably not far off. There are a couple of flaws in this engine, one causes a leak path for the steam, the other makes it bind a bit (and knock as a result), so consequently it doesn't run as slowly as I'd like. I can fix it by making new parts (one of which would be a whole new cylinder - I did get a replacement casting a long while ago), but at this point it's really good enough, I'll apply what I learned on this to new engines which I hope and believe will run better. Still fun to see it ticking along, even if it isn't perfect.
Stuart

Forging ahead regardless.