Author Topic: Manson Engine  (Read 9963 times)

Offline Plani

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Manson Engine
« on: July 01, 2017, 09:19:10 PM »
Hello Everyone

After reading here for quite a while it's time for me to make some contribution. Therefore I will try and show how I'm making my little Manson Engine.

This is what it should look like, once it's finished:



And the cutaway view:


I think the Manson Engine ist the one where you get a running heatengine with the least amount of moving parts  :ThumbsUp:
Therefore this engine wont get any fancy features. Every part is only as complicated as absolutly nececary.


Plani




Offline Plani

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Re: Manson Engine
« Reply #1 on: July 01, 2017, 09:35:34 PM »
Since it's the biggest and most fun part to make, I started with the Cooler/Engine body. 
Unfortunately, I didn't think of taking pictures while turning the part  :facepalm:, sorry about that....

So the journey begins with the cooler on the mill.
A round pocket is milled into the side of the cooler:


A hole is drilled ant tapped M5 to attach the post:


It took some thinking  :noidea: until I realised that it would be the easyest for the further operations when the cooler would already sit on its post. So the post was quickly made and boltet onto the cooler really tight. So I could clamp the assembly in a collet block an adjust it straight:


From there on it was easy to index the part:


And then to drill and where needed to tap the rest of the holes from different sides:




Finished part:



Plani

Offline yogi

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Re: Manson Engine
« Reply #2 on: July 01, 2017, 09:50:51 PM »
Hey Plani!

Good to have you on board!  :ThumbsUp: :ThumbsUp: :ThumbsUp:
I have been intrigued by Manson engines for quite some time, and will be following along closely.
Great start, and I'm looking forward to see more as the engine comes together.

Yogi


Offline b.lindsey

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Re: Manson Engine
« Reply #3 on: July 01, 2017, 10:23:28 PM »
Nice start Plani! I will be following along too. Is this your design?

Bill

Offline crueby

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Re: Manson Engine
« Reply #4 on: July 01, 2017, 10:53:37 PM »
Excellent start!

Does this design use a graphite cylinder or piston, or just normal materials?

 :popcorn:

Offline Plani

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Re: Manson Engine
« Reply #5 on: July 02, 2017, 07:39:29 PM »
Thank you guys  :cheers:

Bill, this is actually the second attempt at this engine. I've already made one which is also running. But in the meantime I saw some Manson engines in the internet which run much faster than mine. So I decided to make some changes to the design (bigger bore, shorter stroke and a different porting) and try it again. Hopefully that will improve performance  :headscratch:

Chris, one design goal of this engine was also to make it as simple as possible. Therefore there are no plans for exotic materials. The cylinder will be made from steel and the piston from brass.


Plani
« Last Edit: July 03, 2017, 06:24:32 AM by Plani »

Offline Plani

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Re: Manson Engine
« Reply #6 on: July 09, 2017, 08:03:41 PM »

Next Part to be made was the cylinder. It's turned from steel bar stock:


The bore is prepared, there is still some material left on the inside as well as on the outside:


The cylinder is then clamped in a collet block to make the slot for the porting:


Back on the lathe, the outside diameter was finished. The excess material from the first step is now removed. This was left there in case something would be distorted by the slitting of the cylinder:


The Cylinder was then cut off the stock and the bore was brought to its final size. There is no chamfering on this end of the bore because this would affect the timing of the opening of the port:



Plani

Offline b.lindsey

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Re: Manson Engine
« Reply #7 on: July 09, 2017, 08:35:06 PM »
Nice finish on that cylinder!! :ThumbsUp:

Bill

Offline yogi

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Re: Manson Engine
« Reply #8 on: July 10, 2017, 09:23:34 PM »
Nice work!  :ThumbsUp:  :ThumbsUp:  :ThumbsUp:

How wide is the slot you milled in the cylinder?

Yogi




Offline Plani

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Re: Manson Engine
« Reply #9 on: July 11, 2017, 08:28:12 PM »
Thank you, Bill  :cheers:

Yogi, the slot was planned to be 1mm wide. But since i had only a 0.8mm slitting saw at hand I made it 0.8mm. The with of this slot is not really critical because it is only one edge that makes the timing.

Plani

Offline Ian S C

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Re: Manson Engine
« Reply #10 on: July 12, 2017, 12:12:56 PM »
I'll be following this one closely, I'v only built versions of the Stirling type hot air motors.
Ian S C

Offline Plani

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Re: Manson Engine
« Reply #11 on: July 15, 2017, 08:09:01 PM »

Hi Ian, glad to have you along too!

Next Part to make was the piston:


I had the intention to make it pretty much the same way as the cylinder. Slitting the Port, this time the slot is made 1mm wide, since on this one both edges contribute to the pressure relive at the end of the stroke:


The hole for the con rod pin was drilled and reamed:


Bit since the brass stock I had was just long enough to make the piston, there was no stock left for clamping. So I made a mandrel on which the piston was to be fastened by an allan bolt:


Turning the piston to its final size:


Finished part:



Next up, the part that holds the displacer:


Turned around and bored to a sliding fit where it will be fixed to the piston:


Finished. The small hole going through the center is to prevent any pressure building up in the displacer and so keeping the glass from popping off:


Piston preassembled using loctite:



Plani

Offline b.lindsey

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Re: Manson Engine
« Reply #12 on: July 16, 2017, 12:51:33 AM »
Still following along Plani. I wasn't all that familiar with these engines so am learning a lot along the way.

Bill

Offline Plani

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Re: Manson Engine
« Reply #13 on: July 17, 2017, 08:33:22 PM »

Thanks Bill, and stay tuned, there are not a lot more parts till we shall know if it's a runner  :Lol:

The conrod was milled from some aluminum stock:


The holes drilled and reamed and then the part was cut off the stock surfaced on the backside:


Like so:


For the main bearing the stand was made pretty much the same way. Some stock was surfaced to thickness and then the contour was milled as well as the bore for the Bearing:




The part was then cut off the stock, turned upside down, surfaced and mounting holes drilled:


The Bearing itself is made from brass:


The bearing preassembled using loctite:



Now there is only the crankdisc, flywheel and the shaft missing...

Plani

Offline yogi

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Re: Manson Engine
« Reply #14 on: July 18, 2017, 12:05:06 AM »
Great work Plani!  :ThumbsUp: :ThumbsUp: :ThumbsUp:
Looking forward to the next parts and assembly...  8)

 

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