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HELP! - Combustion engine vs. Rotary Engine
Im doing a presentation to my class on a rotary engine and I need the lowdown on the advantages of the rotary engine versus a combustion engine. thanks.
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howstuffworks.com
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i know how the rotary works I just hope someone can help me and give a quick summary on the advantages and disadvantages.
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Originally Posted by Minda
i know how the rotary works I just hope someone can help me and give a quick summary on the advantages and disadvantages.
Here's an example of what you'll find: http://www.monito.com/wankel/advantages.html Good luck! :) |
Advantages:
- extremely smooth, no reciprocating parts - can rev easily and happily to speeds that exceed most piston engines Disadvantages: - not as efficient as its piston counterparts - little torque output, must rev high to produce power |
Rotaries are combustion engines. :)
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A rotary engine is an internal combustion engine. You probably want to call the project a comparison between a piston engine and a rotary.
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I would add to the advantages that a rotary has fewer moving parts, so (i) it's less complicated, and (ii) theoretically, at least, there are fewer things that can go wrong.
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Some already mentioned that the rotary is a combustion engine. Other than www.howstuffworks.com, read through rotarygod's posts here. Also, there's some info in these threads/documents:
https://www.rx8club.com/rx-8-multimedia-photo-gallery-6/ny-autoshow-%93structure-working-principles-rotary-engine%94-handout-955-kb-28125/ http://asmic.com/collect/rotary1999/rotary_e.pdf In summary, compared to piston engines of similar size and weight
The Honda S2000's F20c (4 cylinder 2.0L piston engine) is unusual as it's comparable to the RENESIS in many ways. The S2000 gets 15-20% better fuel economy, but it's slightly heavier and larger and is more expensive to build (getting a piston engine to spin up to 8900 RPM and still be reliable requires finer tolerances) which is partly why the high-power 6MT RX8 can be had for $8k less than the S2000. Also, due to the smaller number of moving parts, rotary engines are more durable. For example:
Originally Posted by Rotarynews
When the Lola T616 Mazda first took to the track, it featured a modified 13B rotary engine and was rated at 300-horsepower. As with all rotary engines, the T616 lacked the displacement of competitors' engines, but more than made up for this short-coming with incredible, high-revving reliability and the engine's small size and low weight. In the 1984 season, the team went almost a full year without an engine failure, a huge accomplishment, when other teams were rebuilding their engines after each race. The Mazda Lola's engines weren't even cracked open.
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Also the rotary engine takes less volume (same power and weight) compared to the Otto engine.
You also have to compare it with a 4 cycle piston gas or Otto engine, since a 2 cycle piston gas engine has probably less moving parts and higher power to weight ratio than the rotary or Wankel engine, but also worse emissions. |
Originally Posted by trophymaker
Disadvantages:
- not as efficient as its piston counterparts depends on the eficiency you are talking about. mechanically the rotary is more efficient thermally the piston is more effecient. |
Originally Posted by zoom44
depends on the eficiency you are talking about.
mechanically the rotary is more efficient thermally the piston is more effecient. |
I'm only posting to say that I'm laughing my ass off at the title. Goodbye.
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OMFG! Holy thread revival lol. I'm happy I found this thread because I'm doing the same thing for school and the info in this thread has some good stuff.
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I'm glad someone at least pointed out the fact it's a combustion engine. If our cars didn't have a combustion engine, then what's been happening to all that gas I put in? lol
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Did the OP get banned for this? I wonder sometimes.
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nobdy mentioned that the normal engine goes boing boing while the mazda goes
hmmmmmmmmmmm . |
Originally Posted by Brettus
(Post 2659467)
nobdy mentioned that the normal engine goes boing boing while the mazda goes
hmmmmmmmmmmm . beers :beer: |
Originally Posted by Brettus
(Post 2659467)
nobdy mentioned that the normal engine goes boing boing while the mazda goes
hmmmmmmmmmmm . |
Originally Posted by AJ's Shinka
(Post 2659452)
Did the OP get banned for this? I wonder sometimes.
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^^^Good.
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Originally Posted by Deslock
(Post 709180)
Some already mentioned that the rotary is a combustion engine. Other than howstuffworks.com, read through rotarygod's posts here. Also, there's some info in these threads/documents:
In summary, compared to piston engines of similar size and weight
The Honda S2000's F20c (4 cylinder 2.0L piston engine) is unusual as it's comparable to the RENESIS in many ways. The S2000 gets 15-20% better fuel economy, but it's slightly heavier and larger and is more expensive to build (getting a piston engine to spin up to 8900 RPM and still be reliable requires finer tolerances) which is partly why the high-power 6MT RX8 can be had for $8k less than the S2000. Also, due to the smaller number of moving parts, rotary engines are more durable. For example: |
OP is a fucking idiot.
/thread |
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