Wankel

[fowler]

r97 that is certanly a buggy worth looking into the power would be imense
imagine a motorcycle wankle engine

modelengineer i never knew what I\C stood for but yeah it is

 

[r97]

rotary engines are not only considered i/c but there also 4-stroke, its basically piston engine vs jumbo triangle, lol

 

[sideways]

rotary engines are not only considered i/c but there also 4-stroke, its basically piston engine vs jumbo triangle, lol

They are not 4 strokes as they do not "stroke". They go round and round not up and down. The output shaft also turns 3 times for every revolution of the rotor and the the rotor has three sides so it fires once every revolution. That's like a 2 stroke, not a 4 stroke. It's still not either of those though.

Hayden

 

[fowler]

if anything its either a 3 stroke cause each side fires once each revolution or its a 1 stroke cause at every stage there is a side fireing
it depends if u compare it to a 1 cylender or a 3 cylender

 

[modelengineer]

I don't think it's possible to classify a rotary as a type of "stroke". The rotor doesn't stroke up and down like a piston. If anything it's a 2-stroke as it fires every revolution of the output shaft, the same as a 2-stroke piston engine. If you're taking it as revolutions of the rotor then it fires 3 times every revolution, making it a 2/3rd stroke engine.

In other words, I completely agree with what Hayden said

 

[r97]

dang, more websites lying to me, i hate it when this happens

 

[fowler]

yes i guess so
but yeah it really fits into its own area

 

[r97]

this website says its 4-stroke, http://www.freedom-motors.com/index.php?option=com_content&view=article&id=97&Itemid=77

 

[fowler]

noobs
their engines are not even being produced yet

 

[redsox985]

They make some pretty big claims there too. 18hp out of a 150cc motor. I think they're basing 4 stroke off of the fact that it runs on gasoline not mix. If they were to say it's a 2/3rd stroke like posted above, this forum would be the only google result simply because modelengineer just conceived the idea.

 

[Rotore]

those engines are in the $2k-3k range eeeeeeeeeeeehh

modelengineer idk dude but yes i think it has to do with it not being a piston engine.

 

[KieranM]

yep as redsox said, they only say 4 stroke because its not a mix, the could also say 6 stroke but lets not go there hahaha ( just by it using straight petrol/gas obviously)

 

[Rotore]

It'd be kinda cool to hace one of those sachs 303's

 

[r97]

i read some where people put oil in the gas sometimes because the oil ends-up in the same place as the gas(maybe i got lied to again, lol)

 

[Kenny_McCormic]

Real serious people reroute their injection pump to run on a bottle of 2 stroke oil instead of 4 stroke oil(which isn't really made to burn). It still needs 4 stoke oil in circulation for bearings and whatnot.

 

[r97]

ha! i wasn't lied to! (this time, lol)

 

[Doc Sprocket]

These 2-3-4 "Stroke" debates might be more clear if we use the word "cycle" Let's face it, nothing's "stroking" here, but there IS a cycle...

As for the oil mix thing- I never knew that. So do all those millions of Mazdas have an oil tank like a sled that has to be refilled on a regular basis? What sort of oil was (is) required?

EDIT- I just did a bunch of searching, it is indeed by definition a "Four Cycle" engine. Havent found anything on the oil yet...

 

[modelengineer]

The mazda's burn the engine oil. A little pump pumps it into the inlet as it runs. You have to top up with oil occassionally. Lots of people, as said above, get rid of the little oil pump and run pre-mix 2-stroke oil.

 

[Doc Sprocket]

So- What? It feeds from the crankcase? That's kind of a weird arrangement... Wonder what that does to the whole oil change interval thing... Come to think of it- Emissions tests? Ouch!

 

[r97]

wouldn't a rotary not have a crank case? and its not a weird arrangement just the best way of getting oil to the components. i'm not completely sure but don't rotary engines score better on emission testing , i don't think they go through oil horribly fast though, i'm not completely sure, this is a new topic for me!