Cubic inch question

[old Tom]

Originally Posted by tomcarman

At the risk of offending some. A hillbilly decided to go to college to study math. He comes home on holiday. Ma asks what he learned in math. He says; "Ma, I learned Pi r squared". Ma says; "No no son, Pie are round".

corn bread r square

[GB SISSON]

Originally Posted by Mart

"Just don't ask me to offset grind your merc crank to 4 1/8"

If you can do that with a router and string I'd like to see it.

C'mon Mart.... That takes two strings and an angle grinder. Can someone show me the cubic inch displacement of my stationary engine? One cylinder, 6" bore, 12" stroke.

[Mart]

Yeah. I'll walk you through it.

bore * bore * pi /4 *stroke*no of cylinders

6*6 = 36
36* 3.1416 = 113.0976

113.0976/4 = 28.2744

28.2744 *12 =

339.2928 * 1 = 339.2928

So your single cylinder motor is 339.3 cu in.

[Mart]

Duplicate.

[GB SISSON]

Thank you very much Mart! The brass tag on it states that it produces 8 hp at 300 rpm. I run it at 75 rpm.

[ford38v8]

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Originally Posted by GB SISSON

Thank you very much Mart! The brass tag on it states that it produces 8 hp at 300 rpm. I run it at 75 rpm.

I was thinking hit and miss till you said that.

[GB SISSON]

Originally Posted by ford38v8

I was thinking hit and miss till you said that.

https://www.youtube.com/watch?v=ot5EaCZk5vo
Hit n Miss I did a lot of tuning to get it this slow. It was given to me because it was stuck and the head was missing so I freed it and made a wood pattern for the head and had it cast. In 1989.

[flatford8]

You could’ve been getting a load of laundry done while you were there.......I think watching and listening to one of those motors is to me, the most relaxing thing.....kinda like watching cows graze and chickens peck the dirt.....that’s quite a collection you have Gary!!!!.....Mark

[GB SISSON]

The big stover is mine and I have a 3hp as well as some old air cooled stuff. I sold the gas powered maytag washer. About 5 of us set up in that area every year for the last 34 years at Lynden Wa, in August. I feel smarter now that I understand that formula. Thanks

[V8COOPMAN]

Originally Posted by GB SISSON

I feel smarter now that I understand that formula. Thanks

In your case: 6 X 6 X 12 X .7854 = 339.2928

DD

[GB SISSON]

Originally Posted by V8COOPMAN

In your case: 6 X 6 X 12 X .7854 = 339.2928

DD

Wow! Too easy! I'm starting to like this math thing.