Author Topic: Maudslay Marine Steam Engine on .70 scale  (Read 1318 times)

Offline gbritnell

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Maudslay Marine Steam Engine on .70 scale
« on: March 01, 2019, 04:48:18 PM »
Gentlemen,
Here is a video of the Maudslay running. I played with it for hours yesterday and could only get it to run on one stroke. I played with the valve position until I finally gave up. I went back to the drawings and found that the porting in the valve is too big and therefore it overlaps the porting in the cylinder by too much. This morning I made another new valve, which I wasn't looking forward to because the ports and slots are .031 diameter and width. When I finished the valve I put a register mark on the face so that I would know where the port location was and could more easily time the engine.
I have to finish the reversing valve mechanism but putting air into both ports allow the engine to run very smoothly in both directions. I hope Chuck gets a chance to visit and see his engine.
gbritnell
Talent unshared is talent wasted.

Online Jo

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #1 on: March 01, 2019, 05:18:06 PM »
 8) Nice

Jo
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Offline kvom

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #2 on: March 01, 2019, 05:38:18 PM »
I like the slow motion.  Pretty engine!   :ThumbsUp:

Offline Johnmcc69

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #3 on: March 01, 2019, 05:39:54 PM »
That's just beautiful George!

 John

Offline Ye-Ole Steam Dude

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #4 on: March 01, 2019, 05:41:08 PM »
Hello George,

Beautiful.

Have a great day,
Thomas

Offline crueby

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #5 on: March 01, 2019, 05:42:22 PM »
Spectacular! Really responds to the throttle too!

Offline Don1966

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #6 on: March 01, 2019, 08:55:32 PM »
George thatís cooler then sitting in a tub of ice. Runs a treat!... :praise2:


 :cheers:
Don

Offline b.lindsey

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #7 on: March 01, 2019, 09:17:08 PM »
Wonderful George. I sure hope Chuck will get to see it too. What a fine little runner and just a beautiful engine on its own.

Bill

Offline scc

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #8 on: March 01, 2019, 10:07:55 PM »
That is a lovely engine George............Terry

Offline Dave Otto

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #9 on: March 02, 2019, 12:21:13 AM »
Very nice George!

Dave

Offline Art K

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #10 on: March 02, 2019, 01:36:41 AM »
George,
You did a very good job on the Maudslay engine. And as I have come to expect from you, when you have a problem with it you are a top notch trouble shooter. :ThumbsUp: Runs great, fast slow or any point in between.
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King

Online Kim

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #11 on: March 02, 2019, 03:35:41 AM »
Beautiful engine, George!
Kim

Offline Larry

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #12 on: March 02, 2019, 03:41:46 AM »
Great model ! Thanks for sharing.

Offline gbritnell

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #13 on: March 02, 2019, 08:26:17 PM »
The engine is complete except it's going to need a base. Here's the video of the reversing valve working.
gbritnell
Talent unshared is talent wasted.

Offline fumopuc

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #14 on: March 02, 2019, 08:30:27 PM »
Hi George, a nice runner and perfect made, as always.
Kind Regards
Achim

Offline crueby

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #15 on: March 02, 2019, 09:06:08 PM »
What a sweet little engine!


Anyone ever make a twin version?

Offline b.lindsey

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #16 on: March 03, 2019, 12:52:39 AM »
Wonderful George and runs very well at low rpms too. Love it !!!

Bill

Offline Johnmcc69

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #17 on: March 03, 2019, 01:27:17 AM »
Really nice job George! Great work on that tiny reversing valve.

 Just a great build throughout!

 John

Offline gbritnell

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #18 on: March 20, 2019, 02:32:47 PM »
Here's a short video of the engine with the finished governor. With the tiny size there's just not enough weight to effectively open and close the balls. They do fly out at higher rpm's but there's not enough weight to return them to the rest position. It looks neat though.
Talent unshared is talent wasted.

Offline crueby

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #19 on: March 20, 2019, 03:16:06 PM »
They do look great on there!


Not worth switching to depleted uranium for the wieghts, leave them as is.

Offline b.lindsey

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #20 on: March 20, 2019, 04:50:25 PM »
A very nice addition to an already beautiful engine George!!

Bill

Offline kvom

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #21 on: March 20, 2019, 08:48:38 PM »
The Wikipedia article on Maudslay is worth a look.  He's credited with making the first screw cutting lathe, although Vaucanson made the first all metal lathe a good deal earlier.

Offline crueby

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #22 on: March 20, 2019, 08:55:40 PM »
The Wikipedia article on Maudslay is worth a look.  He's credited with making the first screw cutting lathe, although Vaucanson made the first all metal lathe a good deal earlier.
Reminds me of some of the old TV series like Connections and Industrial Revelations that went through a lot of the early manufacturing inventions and how they built on one another - fascinating stuff.

Offline Johnmcc69

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #23 on: March 20, 2019, 11:00:09 PM »
A fantastic result George!

 John

Offline Craig DeShong

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Re: Maudslay Marine Steam Engine on .70 scale
« Reply #24 on: March 27, 2019, 02:27:19 AM »
Very nice George!
Craig