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Experimental engine Answered

would connecting like 2 or more single cylender horizontal engines like briggs and strattons together flywheel to shaft run as like a 2 cylender in line engine? or has anyone done it even?

example :

if      [0-     represents an engine with the [ being the flywheel, the 0 the crankcase/block and the - a shaft then this is my idea

[0-[0-[0-  and so on like a two cylinder would be [0-[0- would this work? what would i have to do to get this to work?

5 Replies

Re-design (author)2011-12-15

This could work. But since I don't have details of the motors my first thought would be to mount them side by side and use a chain drive to connect them. That way you would eliminate the machining problem of connecting the two inline. Also using chain drive allows you to alter the timing just by slipping the chain. Then if you needed to later you could use the motors for something else.

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cerberustugowarBest Answer (author)2011-12-14

interesting idea.

I'm sure it could work, but i don't think it would be as good as a true in-line 2, or v twin

i imagine you would need to find a strong and non-moving way to connect the drive shaft to the flywheel, not to mention, usually the crankshafts on the flywheel side don't have have a lot of extra threads or anything that would make it easy for you to connect on to.

The timing of the engines would need to be synchronized in such a way that the power strokes of each cylinder would be spread out or the engines could really "chug"

finding a way to start these connected engines could be tough

the crankshafts would all have to be lined up nicely, otherwise any deflection in alignment could be cause for a failure. Using the same engine could lessen the difficulty of alignment.

Carburation may also be tough as you would need either a new carb that could handle the increased CFM of air flow into the engine, or two carbs which are balanced (this is usually done on carbs with a multi tubed vacuum gauge)

that's about all I can think of right now that may give you some problems

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Vyger (author)2011-12-15

There is a new motor design that is supposed to be moving into limited testing production soon. It has the 2 pistons working head to head. In other words they both compress the same cylinder from opposite directions. It actually doesn't have a true "head" because the opposite piston serves that function. So far it has proved to be much more efficient as both pistons produce power rather than one pushing against an immovable block. Its like clapping your hands together as opposed to slapping a table. If they can keep from making it overly complicated it will probably work pretty good.

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iceng (author)Vyger2011-12-15
Vyger (author)iceng2011-12-15

I think they are calling them OPOC engines, Opposed piston opposed cylinder.
Here is a link to one of the developers.
And one on youTube

The developer is saying its approaching 40% efficiency, thats a pretty big improvement.
If you Google it you can find all kinds of info.

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