Author Topic: PM Research Engine Number 1  (Read 42794 times)

Offline Flyboy Jim

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Re: PM Research Engine Number 1
« Reply #105 on: February 27, 2020, 03:14:08 AM »
Thanks everyone, I do appreciate you looking in. Got a couple of commitments that may keep me from the shop this weekend, but hopefully back to it very soon. This casting has been a fun exercise, pushing me a bit more, and I have really enjoyed it, so very much looking forward to picking it up again.

It'll find you again soon Stuart.

I'm a little sidetracked myself lately. Sold my airplane building project and it left in a truck for Oklahoma yesterday. Now .....I'm looking at the empty space, as well as my Wishlist on a few vendor websites.  :whoohoo: Should be fun!  :thinking:

Jim
Sherline 4400 Lathe
Sherline 5400 Mill
"You can do small things on big machines, but you can do small things on small machines".

Offline propforward

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Re: PM Research Engine Number 1
« Reply #106 on: February 27, 2020, 03:17:30 AM »
Wey hey! Sorry to see a project go, but new possibilities abound eh? Good stuff!
Stuart

Forging ahead regardless.

Offline Flyboy Jim

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Re: PM Research Engine Number 1
« Reply #107 on: February 27, 2020, 03:24:18 AM »
Wey hey! Sorry to see a project go, but new possibilities abound eh? Good stuff!

Yes........it was a good thing. I'm excited by the doors this opens.  :) It was a fun project, but time to move on. I'm into smaller projects nowadays.
Sherline 4400 Lathe
Sherline 5400 Mill
"You can do small things on big machines, but you can do small things on small machines".

Offline propforward

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Re: PM Research Engine Number 1
« Reply #108 on: February 27, 2020, 11:42:17 AM »
Looking forward to seeing your ideas shape up!
Stuart

Forging ahead regardless.

Offline gary.a.ayres

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Re: PM Research Engine Number 1
« Reply #109 on: March 11, 2020, 11:23:53 AM »
Back in the shed today. I've not been able to get shed time for a couple of weeks, with other things going on, but some of those things were fun too, so it's all good.

Me likewise, and that's a great way to look at it Stuart.

 :ThumbsUp:

Offline propforward

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Re: PM Research Engine Number 1
« Reply #110 on: September 19, 2020, 09:23:57 PM »
Suddenly decided to get back to the engine today. Lots has been going on, but as cold weather approaches, prime shed season is on us. I've decided that having the bearing caps ready when I do the next stage of machining on the base will be a good idea, so I made a start on those. Mostly just cleaning up and squaring up.









Now I have them set up and ready to receive the bolt holes:



But those will have to wait until tomorrow, as I have to go and repair the controller to our bathroom heated floor. I'd put that chore off, except that I rather like a warm bathroom floor. No rest for the wicked.
Stuart

Forging ahead regardless.

Offline gary.a.ayres

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Re: PM Research Engine Number 1
« Reply #111 on: September 19, 2020, 11:50:50 PM »
Good that you are back on it Stuart!

But yes, the other stuff always intercedes, and the shop time flies...

Offline propforward

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Re: PM Research Engine Number 1
« Reply #112 on: September 20, 2020, 12:12:55 AM »
Thanks Gary, good of you to look in. Shop time really disappears fast, alas.

One problem I have is that I did not machine my base casting in the best sequence, and I'm now scratching my head on how to finish it. This made me put it aside for a while, which turned into a long while. However, I now have a plan, which I am writing out and hope to make a start on tomorrow.
Stuart

Forging ahead regardless.

Offline crueby

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Re: PM Research Engine Number 1
« Reply #113 on: September 20, 2020, 12:15:41 AM »
Watching along, like these engines....   :popcorn: :popcorn: :popcorn:

Offline gary.a.ayres

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Re: PM Research Engine Number 1
« Reply #114 on: September 20, 2020, 12:17:37 AM »
Yeah. Machining sequence...

I have a similar issue with the big end of my current build. Lost my datum today and trying to figure how to get it back. Hopefully tomorrow...

Offline propforward

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Re: PM Research Engine Number 1
« Reply #115 on: September 20, 2020, 12:31:00 AM »
Sometimes it's good to step away for a bit.
Stuart

Forging ahead regardless.

Offline propforward

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Re: PM Research Engine Number 1
« Reply #116 on: September 20, 2020, 12:33:14 AM »
I know I can save it and make it work - I have a back up plan involving marking out, scribing lines and milling down to the marked line, but I'm trying to do things by locating features with a dial indicator and accurately milling to the right position. Anyway - more on that once I have it figured.
Stuart

Forging ahead regardless.

Offline gary.a.ayres

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Re: PM Research Engine Number 1
« Reply #117 on: September 20, 2020, 10:45:37 AM »
A DRO is the boy for that.

Offline propforward

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Re: PM Research Engine Number 1
« Reply #118 on: September 20, 2020, 12:46:29 PM »
You have a point - but the principles of locating edges and holes remain the same. My dilemma is machining a surface at 45 degrees to a surface that has a critical hole in, and getting the new surface to intersect the axis of the hole. Figuring out the dimensions on the angled part is a matterof trigonometry - no problem there - but it’s the act of locating the center of a hole at 45 degrees that had me stumped. But I now have a plan, and I think a pin gauge is the answer. May post more later, but it’s nice out, so may take the sidecar outfit out for lunch.

As it happens, I did order a DRO kit yesterday, but not to solve this problem, just to add functionality and so I don’t have to count handle turns any more.  :ThumbsUp:
Stuart

Forging ahead regardless.

Offline gary.a.ayres

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Re: PM Research Engine Number 1
« Reply #119 on: September 20, 2020, 01:10:14 PM »
Understood. Tricky, but it sounds like you have a solution.

Enjoy your outing!

gary

 

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