Author Topic: Maudslay Marine Engine  (Read 13208 times)

Offline cfellows

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Re: Maudslay Marine Engine
« Reply #210 on: August 10, 2018, 05:39:17 PM »
An absolute beauty Chuck. Definitely deserves a Round Rock doughnut. What is your favorite flavor Chuck?

Eric

Original raised, glazed donuts are my favorite.
So many projects, so little time...

Offline cfellows

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Re: Maudslay Marine Engine
« Reply #211 on: August 11, 2018, 02:51:46 AM »
So today I started on a reversing valve.  It's similar to the one posted by Tug and Brian's, only smaller.



The rotating disk will be 7/8" diameter and the ports will be 1/8" diameter.  I'm attempting to incorporate the valve with no visible plumbing showing other than the valve and the inlet  / exhaust fixtures.  The ports from the valve to the cylinder will be incorporated into the brass base... or at least that's the current plan.
So many projects, so little time...

Offline cfellows

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Re: Maudslay Marine Engine
« Reply #212 on: August 11, 2018, 06:28:11 PM »
An absolute beauty Chuck. Definitely deserves a Round Rock doughnut. What is your favorite flavor Chuck?

Eric

I don't suppose you had anything to do with a couple dozen Round Rock donuts showing up at my place this morning????  :)

Chuck
So many projects, so little time...

Offline Tennessee Whiskey

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Re: Maudslay Marine Engine
« Reply #213 on: August 11, 2018, 06:58:47 PM »
Who: me?  8) 8)

Offline cfellows

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Re: Maudslay Marine Engine
« Reply #214 on: August 12, 2018, 04:54:30 AM »
Today I got the reversing valve pretty well finished.  I also got the base drilled for the new air passages.



The blue lines show horizontal holes that were drilled through the base.  The entrances to those holes will be plugged with soldered brass rod.  Here is a picture of the reversing valve disassembled.  The two holes in the bottom will connect to the two holes in the base which lead to the cylinder rocker blocks on either side of the cylinder.





The hold on the upper left will connect to the compressed air source.  The bottom center hole in the valve block is the exhaust port and goes all the way through the valve block.  Here's what it will look like assembled.



Air will be delivered to and exhausted from the cylinder through the bottom of the cylinder pivot shaft where it passes through pivot shaft bearing blocks.
So many projects, so little time...

Offline kvom

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Re: Maudslay Marine Engine
« Reply #215 on: August 12, 2018, 01:07:27 PM »
Good engineering but for me that valve looks way out of proportion to the engine, which is quite elegant.  I'd suggest mounting it on the sub-base.  Just my 2cents. 

Offline cfellows

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Re: Maudslay Marine Engine
« Reply #216 on: August 12, 2018, 06:08:16 PM »
Good engineering but for me that valve looks way out of proportion to the engine, which is quite elegant.  I'd suggest mounting it on the sub-base.  Just my 2cents.

I think you may be right.  I'm going to have a look at mounting the reversing valve on the corian base beside the 2 air holes drilled into the brass base.
So many projects, so little time...

Offline 10KPete

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Re: Maudslay Marine Engine
« Reply #217 on: August 12, 2018, 07:04:34 PM »
I like the idea of the valve mounted where you have it. The valve itself is at odds with the engine in that the valve is square with sharp corners whereas the engine is all nicely rounded and smooth.

I think some cosmetic work on the valve would solve the problem...

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

Offline cfellows

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Re: Maudslay Marine Engine
« Reply #218 on: August 14, 2018, 10:43:31 PM »
Well, after careful consideration and 4 different iterations of valve bodies, I came up with this design.



The original design is on the left and the new, smaller design is on the right.  I've decided to mount the valve on the brass base, as originally intended, mostly because it's a much cleaner design and hides virtually all of the plumbing except the input port.
So many projects, so little time...

Offline Johnmcc69

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Re: Maudslay Marine Engine
« Reply #219 on: August 14, 2018, 11:41:08 PM »
 :ThumbsUp:
 I like it Chuck, fits well with the rest of the curves of the engine.

 I'll try not to digress...about...curves.... :naughty:

 John

Offline cfellows

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Re: Maudslay Marine Engine
« Reply #220 on: August 15, 2018, 02:51:00 AM »
:ThumbsUp:
 I like it Chuck, fits well with the rest of the curves of the engine.

 I'll try not to digress...about...curves.... :naughty:

 John

Thanks, John, yes, we all like those curves...

I've begun to reassemble the engine.  Still have a bit of plumbing to finish before it's ready to run, but you can see where things are going.



Here's a picture showing the drilled passages inside the base



The air inlet port in the base is drilled and tapped with a 1/4" model taper thread.  A short 1/4" (model size) nipple will connect to a tee.  The pipe out the side of the tee will be directed to the rear of the engine where the air supply will be connected.  The other end of the straight part of the tee will be threaded to accept a needle valve which will act as an air control valve (throttle).
So many projects, so little time...

Offline Art K

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Re: Maudslay Marine Engine
« Reply #221 on: August 15, 2018, 03:02:14 AM »
Chuck,
Man I'm gone for two weekends and you go from I'll have this running soon, to running with reverse. Things are looking good Chuck. Seeing that I am from Wisconsin according to my wife there are no "good" donuts in WI. I hope that's not the case with Round Rock donuts. :lolb:
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King

Offline 10KPete

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Re: Maudslay Marine Engine
« Reply #222 on: August 15, 2018, 03:31:14 AM »
That's just beautiful, Chuck. A very nice engine.

 :praise2: :praise2:

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

Offline Ye-Ole Steam Dude

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Re: Maudslay Marine Engine
« Reply #223 on: August 15, 2018, 09:02:01 AM »
Hi Chuck,

That is perfect, really looks good with the engine.

Have a great day,
Thomas

Offline gbritnell

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Re: Maudslay Marine Engine
« Reply #224 on: August 15, 2018, 02:23:20 PM »
I like the smaller rounded version Chuck. It looks like it was designed as part of the engine.
gbritnell
Talent unshared is talent wasted.