4 cylinder steam engine

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un1corn
Posts: 131
Joined: Sat Dec 26, 2015 2:06 pm

4 cylinder steam engine

Postby un1corn » Fri Aug 16, 2019 2:33 pm

Horizontal 4 cylinder rotary valve steam engine.
Attachments
4CVR 5.JPG
4CVR 5.JPG (297.46 KiB) Viewed 3195 times
4CVR 4.JPG
4CVR 4.JPG (405.32 KiB) Viewed 3195 times
4CVR 3.JPG
4CVR 3.JPG (275.95 KiB) Viewed 3195 times
4CVR 2.JPG
4CVR 2.JPG (165.91 KiB) Viewed 3195 times
4CVR 1.JPG
4CVR 1.JPG (193.69 KiB) Viewed 3195 times
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bitacovir
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Re: 4 cylinder steam engine

Postby bitacovir » Sat Aug 17, 2019 3:44 pm

Spectacular!
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triplus
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Joined: Mon Dec 12, 2011 4:45 pm

Re: 4 cylinder steam engine

Postby triplus » Sun Aug 18, 2019 1:10 pm

Nicely done!
dubstar-04
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Re: 4 cylinder steam engine

Postby dubstar-04 » Sun Aug 18, 2019 3:56 pm

That looks fantastic! Thanks for sharing!
user1234
Posts: 190
Joined: Mon Jul 11, 2016 5:08 pm

Re: 4 cylinder steam engine

Postby user1234 » Sun Aug 18, 2019 9:29 pm

Looks very good! But are the teeth of the bevel gear functionally?

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ickby
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Re: 4 cylinder steam engine

Postby ickby » Mon Aug 19, 2019 6:55 am

Nice one! What is the reason to have the 180° differential of the pistons, and not 90°? As it is now you have a dead point where no force can be created (the situation shown in the pictures), but with each piston rotated by 90° you could have continuous force, which allows a smaller flying wheel.
herbk
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Re: 4 cylinder steam engine

Postby herbk » Mon Aug 19, 2019 7:27 am

ickby wrote:
Mon Aug 19, 2019 6:55 am
As it is now you have a dead point where no force can be created (the situation shown in the pictures), but with each piston rotated by 90° you could have continuous force, which allows a smaller flying wheel.
Hi ickby,
if the force of the pistons is at 180° (like it is) the force is straight to the direction of the piston movement.
If you work with 90° you get aditional bending forces and oscillations, which needs a much more strong case. - May be the vibrations gets so strong that it's not possible to deal with...

Thats also the reason why a reguler 4 cylinder engine never has the working order 1 2 3 4.
Last edited by herbk on Thu Sep 05, 2019 7:28 am, edited 1 time in total.
Gruß Herbert
un1corn
Posts: 131
Joined: Sat Dec 26, 2015 2:06 pm

Re: 4 cylinder steam engine

Postby un1corn » Sun Aug 25, 2019 1:44 pm

As well as agreeing with Herbk comments, this is how the model is presented in the plans.
realgrm
Posts: 1
Joined: Thu Sep 05, 2019 12:05 am

Re: 4 cylinder steam engine

Postby realgrm » Thu Sep 05, 2019 12:20 am

Hi, nice project.
Since I'm new here, I'm wondering if there is a way to download the 3d model to open in FreeCAD. I can only see the images.
I'm taking motor combustion classes and play with this model would be nice!
triplus
Posts: 8799
Joined: Mon Dec 12, 2011 4:45 pm

Re: 4 cylinder steam engine

Postby triplus » Thu Sep 05, 2019 1:53 pm

realgrm wrote:
Thu Sep 05, 2019 12:20 am
Hi, nice project.
Since I'm new here, I'm wondering if there is a way to download the 3d model to open in FreeCAD. I can only see the images.
I'm taking motor combustion classes and play with this model would be nice!
Indeed, it looks like @un1corn didn't share the FCStd file. Best to wait for his response, regarding that.
Last edited by Kunda1 on Thu Sep 05, 2019 9:29 pm, edited 1 time in total.
Reason: edited to remove superfluous discussion