Calculas based rotary
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Calculas based rotary
While i was looking over my cal2 stuff I ran across something cool...There is a section called "Motivating the Chapter - The Wankel Rotary Engine and Area" I was thinking exactly that "MOTIVATING" I scaned it but it is about 702KB, so i can't load it.
Direct Quote:
" The Wankel rotary engine has several advantages over the piston engine. A rotary engine is approximatley half the size and weight of a piston engine of equivalent power. Compared with the 97 major moving parts in a V-8 engine, the typical two rotor rotary engine has only three major moving parts. As a result, the Wankel engine has lower labor and material costs and less internal energy waste."
Direct Quote:
" The Wankel rotary engine has several advantages over the piston engine. A rotary engine is approximatley half the size and weight of a piston engine of equivalent power. Compared with the 97 major moving parts in a V-8 engine, the typical two rotor rotary engine has only three major moving parts. As a result, the Wankel engine has lower labor and material costs and less internal energy waste."
Last edited by Turbo_F1; 08-07-02 at 01:25 AM.
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i was just looking at that again today, everytime i get fet up studying calc 2 i seem to end up at that page. My final is this thursday, i'm going nuts. Boost problems and calculus 2, what a combiniation
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Actually i was wondering the same thing about that same thing, but they showed a FB on it, that was the 12A right? They probably did not have problem....I really do not know....
#6
Actually they are less efficient. But they do have the cost part right.. a rotary is less costly to manufacture. But because it takes someone who knows what they are doing they charge you more to build a good motor.
A good street port motor shouldn't cost more then 3-4K
Now a piston engine built up will cost alot more just because all the parts that need to be changed out.
-Zach
A good street port motor shouldn't cost more then 3-4K
Now a piston engine built up will cost alot more just because all the parts that need to be changed out.
-Zach
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Actually they are less efficient
You get 3 rotations of the eccentric shaft per 1 rotation of the flywheel. How is that ******* inefficient? The slide valves on the engine make it sloppy and inefficient. Go read up on a rotary 101 site or something.
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Originally posted by redhat778
Ya it was in my ap calc book in high school too. Had a pic of a 12A at the beginning of the integration chapter. I ripped the page out and saved it
Ya it was in my ap calc book in high school too. Had a pic of a 12A at the beginning of the integration chapter. I ripped the page out and saved it
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ReZ311 is right, they are very efficient. But the way it works is that there are three revolutions of the eccentric shaft per one rotation of the rotor, but one rotation of the rotor has 3 power strokes and therefore it equates to 1 power stroke per revolution, rather than 1 power stroke per 2 revolutions in a piston engine.....
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There is a misconception about the rotary engine. Alot of people think it is inefficient because of the low MPG )mine gets about 12 on a good day), but in reality the mechanics of the engine produce a very efficient geometry. The reason the fuel economy is so poor is directly related to the fact that the wankel rotary design canīt run lean without burning up. To avoid burning up, we have to use fuel as a coolant (as stupid as that sounds). So we run the RX7 extremely rich to avoid burning the apex seals out, etc... Its a catch-22. You donīt achieve fuel efficiency, but you definately achieve hp/cm2 and hp/weight efficieny.
#15
I am talking about the efficiancy of the combustion chamber.. ever notice a rotary only makes ~80% of the power a piston engine does???
A 1.3 liter rotary is equiv to a 2.6 liter 4 stroke piston engine.
They are efficient in thier size, but not in combustion
-Zach
A 1.3 liter rotary is equiv to a 2.6 liter 4 stroke piston engine.
They are efficient in thier size, but not in combustion
-Zach
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three revolutions of the eccentric shaft per one rotation of the rotor
I meant, 1 rotation of the rotor = 3 rotations of the flywheel.
Blaaaahhhhhhhhhhhhhhhh!!
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