I hope my engine doesn't look like thiss inside

[Dave951]

I've never really noticed this before, but look at the internals of this engine. What's wrong?



Dave





[This message has been edited by Dave951 (edited 05-07-2001).]

[Mrmerlin]

Hi Dave this looks like a 2 stroke or better yet a cox motor........Stan

[Dave951]

Keep guessing, it's much worse.

Dave

[Porsche 951 Fanatic]

ok first off there is no valve for the crank to hit, also the intake and exhaust are open at the same time... it should be like this...

am i right?

[Blackfoot]

probably the most beautiful engine design ever.

[Dave951]

Shaun- I'm ashamed that you called the piston a valve.

Okay, first of all, there are two ports without valves. The one on the left that goes off to a mysterious location(is it an intake or exhaust). The second port vents to the crankcase. Now there's a good mod. Let's vent our exhaust into the crankcase. We all know how dirty, hot oil helps the performance of your engine.

Finally, the answer I was looking for was the following. Look at how the connecting rod attached the piston to the crank. Most connecting rods I have seen are found emminating from the center of the piston on the wrist pin. This engine has a cool design were the connecting rod attached to the OUTSIDE of the piston. Either there is a cool slot running up the cylinder wall to give that connecting rod clearance, or they just let it gouge the cylinder wall.

Better be using Mobil 1!!!

Dave

[cyclemike]

Dave, technically the piston is acting as a valve. It opens and closes the intake and exhuast ports much like a valve does. Technically speaking of course. I think the picture of the piston is a transparency, letting you see through the piston itself. However, it's just a silly little picture anyway.

Mike

[EGSMachine]

I think the ignition needs a couple degrees BTDC. just a thought.
e

[Dave951]

Cyclemike, you're right, the piston does act as a valve. However, the way that it is setup, the piston would suck in air into the crankcase, not the combustion chamber.

Dave

[wolfrpi]

On a two stroke air (with gasoline and oil) is actually sucked into the crankcase first. The oil lubricates the bottem end (this is why two-strokes require oil to be mixed with gas). The crankcase pressurizes the mix and sends it up to the combustion chamber to be compressed and ignited.

Erick

[This message has been edited by wolfrpi (edited 05-07-2001).]

[Mrmerlin]

Hi Dave well after some other responses i am still thinking this is either a 2 stroke motor or a model airplane engine(COX).
On the Cox motor the fuel metanol and castrol is passed thru the crankcase and gets sucked into the cyl the ignition is self sustaining ie no spark plug per se is required it does have whats called a glow plug this device gets hot and stays hot enough to ignite the next fuel charge, the picture also shows the piston and the wrist pin from the inside if you look you will see an outline of the piston and the red inside is clear, why do i say it is a 2 stroke well in a 2 stroke ther are no valves as in a 4 stroke engine but there is whats called a reed valve this lets the Air fuel mixture in when there is enough suction to pull it thru the reed also another thing this is also a good example of why there is a tuned pipe on a 2 stroke as the pipe acts as a suction device to keep the flow moving ,........comments???..........Stan

[Gordon Rankin]

Blackfoot,
A picture of a ROTARY engine??? Great sense of humor.

[TheStig]

Rotaries.....HAH

We don't need no stinkin rotaries >=)

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