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Strange but simple engine.

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vtsteam:
Not much help after using Babelfish on the comment:

"After two years of construction and some internal combustion engines, I have updated my first engine with my experience and new knowledge.

Now the good piece running also with Al"

Later:

I've been slowly typing the scene texts into the translator. Too much talk about how everything is not critical, and was done by eye! Finally something interesting. The sparkplug was made from half of a power resistor, and has a notch at the bottom.

Not up to the valve yet......

shipto:
I think I have it:
bdc to approx 15 degrees is intake the fuel is fed down the side on the "spark plug" shown at about 3.10 I am guessing it is a porous material or a slightly loose fit, the spark happens a fraction before the ports are completely closed and the fuel kicks it forward until the ports reopen at around 165 degrees. inertia then takes over to exhaust the burnt gasses out until bdc is reached again.

RussellT:
That's helpful, Dwayne.

So we have a combined induction and power stroke, with no compression, and an exhaust stroke.

I think the fuel is fed in through a small pipe with a couple of holes in running alongside the ports (3.19 - 3.21).  I suppose this must also mean that it sucks fuel through the jets on the exhaust stroke - although I suppose that might be avoided if they were at the correct angle to the airflow.

That's a clever idea for the spark plug.

Russell

shipto:
Not saying I am 100 percent right that was just the way I think its working.
That spark plug looks very similar material to those air stones you use for fish tanks, so I am sure its running more on the fumes than actual raw fuel/air mix as I cant see any way of atomising the fuel. Having said that the intake seems very far back so if the fuel is dripping down then when the port is almost closed there may be a babbington type effect happening.
Either way I doubt that the engine is capable of producing much power.
Still neat though.

vtsteam:
From what I see, there are only wires going to the spark plug. No fuel line.

It is made from a power resistor body cut in half, and it is inserted at right angles to the cylinder.

There is a  jet tube inside the "carb" immediately in front of the oscillating valve ports that works similar to Russel's intake port..

If you look closely you can see the tiny orifice in the tube (and the plugged end of the tube), and the point at which methanol sprays into the port.

I believe the port serves for both intake and exhaust. Actually there are two ports in line. But probably because he doesn't have the means to mill a slot. Or the realization he can file it from the two holes. It's all pretty crude from a construction skill standpoint. But it is cool from an idea standpoint.

The timing is such that the port is open both ahead and after TDC to do the exhaust and intake within that period.

It's very primitive, but very interesting in terms of simplicity......if I'm right about all this.


ps. There's also the curious matter of the other two holes opposite the cylinder ports. I'm wondering if they tend to direct exhaust away from intake air because of their location and the timing. If exhaust puff goes out those ports but then creates low pressure behind in the carb, air could be drawn in axial to the pivot/carb reducing the mixing of exhaust and intake, and giving the cylinder a reasonably fresh charge.

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