Author Topic: Maudslay Marine Steam Engine  (Read 4969 times)

Online crueby

  • Full Member
  • *****
  • Posts: 8561
  • Rochester NY
Re: Maudslay Marine Steam Engine
« Reply #15 on: February 10, 2019, 03:37:16 PM »
Excellent progress (as usual) !
 :popcornsmall:

Offline gbritnell

  • Full Member
  • ****
  • Posts: 1935
Re: Maudslay Marine Steam Engine
« Reply #16 on: February 11, 2019, 04:46:07 PM »
This morning I got the upper head, piston, piston shaft and packing gland completed. Piston and shaft from 303 stainless. One end pressed into piston the rod end screwed in place with 6-40 threads.
Talent unshared is talent wasted.

Offline gbritnell

  • Full Member
  • ****
  • Posts: 1935
Re: Maudslay Marine Steam Engine
« Reply #17 on: February 12, 2019, 07:14:36 PM »
I finished up the valve links and made a couple of 0-80 hex bolts to mount them. Most of the bolts will be hexed or acorn style.
Talent unshared is talent wasted.

Online crueby

  • Full Member
  • *****
  • Posts: 8561
  • Rochester NY
Re: Maudslay Marine Steam Engine
« Reply #18 on: February 12, 2019, 07:41:54 PM »
beatifully done so far - if I hadn't been reading from the start, I would think those parts are much larger!
 :popcorn: :popcorn: :popcorn:

Offline Don1966

  • Full Member
  • *****
  • Posts: 5969
  • Morgan City, LA (Along the Gulf Coast)
Re: Maudslay Marine Steam Engine
« Reply #19 on: February 12, 2019, 08:49:16 PM »
Excellent work George but I have to ask are you soft sokdering or silver soldering?


 :cheers:
Don

Offline gbritnell

  • Full Member
  • ****
  • Posts: 1935
Re: Maudslay Marine Steam Engine
« Reply #20 on: February 12, 2019, 11:48:22 PM »
Hi Don,
Just 50/50 soft solder. There's really no high pressure involved so soft solder is fine, and it's much easier to clean up.
gbritnell
Talent unshared is talent wasted.

Offline b.lindsey

  • Global Moderator
  • Full Member
  • *****
  • Posts: 13363
  • Dallas, NC, USA
    • Workbench-Miniatures
Re: Maudslay Marine Steam Engine
« Reply #21 on: February 13, 2019, 02:24:57 AM »
Making rapid progress George, and as inspiring as always.

Bill

Offline Craig DeShong

  • Full Member
  • ****
  • Posts: 441
  • Raleigh,NC. USA
    • Lauson small engines
Re: Maudslay Marine Steam Engine
« Reply #22 on: February 13, 2019, 02:49:52 AM »
Very nice George, following along.  :popcorn:
Craig

Offline gbritnell

  • Full Member
  • ****
  • Posts: 1935
Re: Maudslay Marine Steam Engine
« Reply #23 on: February 13, 2019, 05:50:06 PM »
This morning's work was to make the air line and fittings that go from the bottom head/valve block to the upper cylinder. The bolt for this scaled to .051 diameter so I made them M1.2 x .25. The hex is 1/16th.(.062)
The tube was first soldered to the base fitting then it was installed on the cylinder. A minute piece of solder was layed on the joint between the upper fitting and tube and sweated in place.
Talent unshared is talent wasted.

Offline Ye-Ole Steam Dude

  • Full Member
  • ****
  • Posts: 1342
  • Deep East Texas on Sam Rayburn Lake
Re: Maudslay Marine Steam Engine
« Reply #24 on: February 13, 2019, 08:14:38 PM »
Hello George,

Your work is absolutely beautiful as usual.

Have a great day,
Thomas

Offline gbritnell

  • Full Member
  • ****
  • Posts: 1935
Re: Maudslay Marine Steam Engine
« Reply #25 on: February 15, 2019, 05:50:44 PM »
Yesterday I started on the crankshaft. It's made from 1144 steel. We know that 1144 doesn't come in flat stock so I milled a piece of 1.00 diameter bar to .875 x .350. I set the bar on end and center drilled the ends. I then mounted the piece in a 4 jaw chuck and rough turned on end of the main shaft leaving .015 stock for finishing. I then extended the piece out far enough to cut the throw journal. Using an indicator I offset the stock to get the proper stroke. Using a bifurcated tool that I use strictly for crankshafts I cut the throw. I then band sawed the extra material from the uncut end. I milled the blank to get it to .35. This makes cutting the diameter a little smoother going across the corners.
The crank was then mounted between centers using a home-made dog to drive the part. Both ends of the shaft were turned to size and polished. The drawing calls for a complete radius on the ends of the crank webs so I made a step-off chart and milled them with a ball mill.
The steps were filed and polished.
Sorry there's no work in progress pictures but the part is so small it's hard to get effective pictures while working.
Talent unshared is talent wasted.

Offline 10KPete

  • Full Member
  • ****
  • Posts: 1559
  • Nordland, WA, USA
Re: Maudslay Marine Steam Engine
« Reply #26 on: February 15, 2019, 08:16:34 PM »
Nice looking crank, there! Great finish for a such a little part.

Pic of bifurcated tool please? I'm pretty sure what it is but....

There's that huge penny again!

Pete
Craftsman, Tinkerer, Curious Person.
Retired, finally!
SB 10K lathe, Benchmaster mill. And stuff.

Online crueby

  • Full Member
  • *****
  • Posts: 8561
  • Rochester NY
Re: Maudslay Marine Steam Engine
« Reply #27 on: February 15, 2019, 08:35:47 PM »
Wonderful finish. Did you do something to the side of the web to give it that greyer matte look?

Offline yogi

  • Full Member
  • ****
  • Posts: 408
  • Duncannon, PA USA
    • Yogi's Workshop
Re: Maudslay Marine Steam Engine
« Reply #28 on: February 15, 2019, 08:51:05 PM »
Fantastic work George!  :ThumbsUp: :ThumbsUp: :ThumbsUp:
It's always a joy to see your work!  :popcorn:

Offline Art K

  • Full Member
  • ****
  • Posts: 1104
  • Madison, Wisconsin USA
Re: Maudslay Marine Steam Engine
« Reply #29 on: February 15, 2019, 10:05:36 PM »
George,
That crank looks great. You're making great progress.
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King