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Author Topic: Compounding Two Stuarts  (Read 134 times)

Steam Technology

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Compounding Two Stuarts
« on: August 23, 2020, 01:33:37 am »
I am not the first to try this by any means, but two phnomena whenrunning these engines made me wonder.
The No7 has a lot of exhaust steam when running and the S50 needs very little pressure to run.

 

I did an initial test on air but in fact it works better on steam, probably due to the expansion and steam oil
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Swift Fox

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Re: Compounding Two Stuarts
« Reply #1 on: August 23, 2020, 02:31:09 am »
Nice to see you having fun with this Dave, actually they are running in reverse compound as normally the small bore cylinder is the high pressure and the larger bore the low pressure to make use of the expanding properties of steam. Try running the No 7 off the S50’s exhaust for fun.  :) ;D

Here is a video I did of a primitive triple expansion setup:
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Steam Technology

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Re: Compounding Two Stuarts
« Reply #2 on: August 23, 2020, 04:25:35 am »
I actually meant compond as in combining rather than in the steam sense. My two emgines will struggle in the other order due to their construction.
I like your setup with the three engines, shows the principle very well.
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Swift Fox

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Re: Compounding Two Stuarts
« Reply #3 on: August 23, 2020, 07:30:43 am »
Quote from: Steam Technology
I actually meant compound as in combining rather than in the steam sense. My two engines will struggle in the other order due to their construction.
I like your setup with the three engines, shows the principle very well.

Ah i see now!!, it is a good use of exhaust steam that would otherwise be wasted. ;)

I didn't think my three engines would work but they did and on very low pressure i might add too, most likely because each one is very well made. The setup would have worked a lot better with a higher PSI and it isn't a technically a true compound since the three engines are not linked as one. Still it was fun to demonstrate though. ;D ;D
Your nose is before your eyes, so trust it first!

Steam Technology

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Re: Compounding Two Stuarts
« Reply #4 on: August 24, 2020, 03:54:56 am »
Does the use of recycled exhaust steam make this an enviromentally friendly green steam machine? ::) :o 8)
ALWAYS WORKING TO FIND A CURE FOR CENOSILLICAPHOBIA
Cheers. Dave.

Steam Technology

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Re: Compounding Two Stuarts
« Reply #5 on: August 24, 2020, 04:54:32 pm »
Does the use of recycled exhaust steam make this an enviromentally friendly green steam machine? ::) :o 8)
ALWAYS WORKING TO FIND A CURE FOR CENOSILLICAPHOBIA
Cheers. Dave.

Jim

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Re: Compounding Two Stuarts
« Reply #6 on: August 24, 2020, 06:41:21 pm »
Dave that was very cool mate!
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Steam Technology

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Re: Compounding Two Stuarts
« Reply #7 on: August 25, 2020, 06:37:11 am »
Thanks Jim
ALWAYS WORKING TO FIND A CURE FOR CENOSILLICAPHOBIA
Cheers. Dave.