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6U684

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The side by side 2 cylinder 4 cycle was used to good advantage by JD for forty years. Heard a Rumley sounding the same. Did Rumley have a patent on that design?
 
What's to patent?

With a side-by-side horizontal 2-cylinder 4-cycle engine, you have two choices... fire every 180º, with the resulting mechanical imbalance, or fire 180º/540º with the resulting "Johnny Popper" sound, and resulting unbalanced power strokes.
 
What do you mean by 540 degrees? Seems like that's just 180 plus 360 so isn't that just firing every 360 degrees?
 
I'm NOT sure what your point is, but classic "Johnny Poppers" fire the LH cylinder, then fire the RH cylinder 180º later, then 540º pass 'til the LH cylinder fires again.
 
A better way to ask is: who was the first to use that design? Did the Waterloo Boy have two cylinders?
 
Yes, the Waterloo Boy had a flat 2-cylinder engine.

It evolved into the John Deere "D" engine, after Deere bought the Waterloo Gas Engine Company.
 
No. They fire one-two at 180 degrees,then rotate all the way around to two exhaust strokes then back up on compression before they fire again.
 

Funny thing about the Rumley..it was more of a "2-Cycle engine..!!!!
Before starting, you had to hand-crank the "oiler" 60 turns, to pre-oil the bearings, then as it ran, the "oiler" continued to pump oil into the bearings and the engine then burned that oil ...
The "oiler" held about one quart of oil..
That is why they smoked so much..!
There was no oil in any sump, inside the engine..!
 
If the Waterloo Boy had two side by side cylinders, did the Froehlich, it's predecessor have a similar design? I am just curious who was the first to employ that sensible design. I used to be an engineering test technician for the JD 2cyl (20 & 30series) a long time ago. I remember when they bought out the Lantz (German one cylinder tractor). A lot was happening then as they were secretly designing/developing a 4 cyl line. But this memory thing is getting a slippery to get ahold of!! Leonard
 
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