rotary engines: advantages
01-07-2008, 06:12 PM
#1
is adjusting valve lash
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rotary engines: advantages
i'm wondering why i never saw a comparison of advantages of rotaries to pistons?
are they that obvious, or people just love it sooo much that they don't care?
at any rate, this will be some good read and leaves room for some more input.
PROS:
1)no timing belt to change
2)no sudden catastrophic failure from snapped belt compared to a timing belt equipped piston motor
3)less moving parts
4)no valve adjustment or other attached maintenance than regular routing maintenance
5)light weight
cons:
1)high oil consumption
2)high fuel consumption
3)more frequent ignition component maintenance
4)
please feel free to add. i'd like to see where the list stops.
and someone should sticky this, i'm tires of noobs coming in with "rx-8 vs S2k, which should i get?" posts. let them see the pros/cons for themselves
are they that obvious, or people just love it sooo much that they don't care?
at any rate, this will be some good read and leaves room for some more input.
PROS:
1)no timing belt to change
2)no sudden catastrophic failure from snapped belt compared to a timing belt equipped piston motor
3)less moving parts
4)no valve adjustment or other attached maintenance than regular routing maintenance
5)light weight
cons:
1)high oil consumption
2)high fuel consumption
3)more frequent ignition component maintenance
4)
please feel free to add. i'd like to see where the list stops.
and someone should sticky this, i'm tires of noobs coming in with "rx-8 vs S2k, which should i get?" posts. let them see the pros/cons for themselves
Last edited by TrochoidMagic; 01-07-2008 at 07:25 PM.
01-07-2008, 07:07 PM
#7
Extraordinary Engineering
01-07-2008, 07:24 PM
#10
is adjusting valve lash
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high revving...yes, that one is good.
01-07-2008, 07:31 PM
#11
is adjusting valve lash
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what? you can't gather any thoughts?pros and cons.
supply them. whats it to you?
have you seen the constant lame questions of car comparisons posts by noobs?
i'd have to agree that rotaries are NOT for everyone. and if you are clear on the pros/cons of it, then make your decision on such...its like no-one bothers to get a friggin brochure nowadays.
so yeah, any pros/cons you'd like to supply?
01-07-2008, 07:38 PM
#13
is adjusting valve lash
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just how is that a pro? with all seriousness...
i know one power stroke/exhaust stroke every crank revs. or 3 crank rev for every one rotor revolution... but what are the exact advantage of having high temps?
and is that what you would like to state as an advantage if you were promoting the facts of this motor?
i know one power stroke/exhaust stroke every crank revs. or 3 crank rev for every one rotor revolution... but what are the exact advantage of having high temps?
and is that what you would like to state as an advantage if you were promoting the facts of this motor?
01-07-2008, 07:49 PM
#16
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i'm wondering why i never saw a comparison of advantages of rotaries to pistons?
are they that obvious, or people just love it sooo much that they don't care?
at any rate, this will be some good read and leaves room for some more input.
PROS:
1)no timing belt to change
2)no sudden catastrophic failure from snapped belt compared to a timing belt equipped piston motor
3)less moving parts
4)no valve adjustment or other attached maintenance than regular routing maintenance
5)light weight
6)high exhaust flow: turbocharge friendly
7)compact size for lower placement and pmoi
cons:
1)high oil consumption
2)high fuel consumption
3)more frequent ignition component maintenance
4)
please feel free to add. i'd like to see where the list stops.
and someone should sticky this, i'm tires of noobs coming in with "rx-8 vs S2k, which should i get?" posts. let them see the pros/cons for themselves
are they that obvious, or people just love it sooo much that they don't care?
at any rate, this will be some good read and leaves room for some more input.
PROS:
1)no timing belt to change
2)no sudden catastrophic failure from snapped belt compared to a timing belt equipped piston motor
3)less moving parts
4)no valve adjustment or other attached maintenance than regular routing maintenance
5)light weight
6)high exhaust flow: turbocharge friendly
7)compact size for lower placement and pmoi
cons:
1)high oil consumption
2)high fuel consumption
3)more frequent ignition component maintenance
4)
please feel free to add. i'd like to see where the list stops.
and someone should sticky this, i'm tires of noobs coming in with "rx-8 vs S2k, which should i get?" posts. let them see the pros/cons for themselves
01-07-2008, 10:41 PM
#21
Hmm, should I have an engine with over a thousand moving parts—or three? Gee, that's a tough one.
The big advantage of the rotary is… feel & handling. The tiny, lightweight Renesis–barely 13" tall—allows a near mid-engine design and a 50/50 weight balance—the secret behind the 8's remarkably lively feel, agility and handling.
The big advantage of the rotary is… feel & handling. The tiny, lightweight Renesis–barely 13" tall—allows a near mid-engine design and a 50/50 weight balance—the secret behind the 8's remarkably lively feel, agility and handling.
01-08-2008, 01:11 AM
#23
rotorized!!!
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the biggest pro for the rotary isn't for cars, it's for airplanes:
reliability thru simplicity: it won't fail catasthophically because it's perfectly balanced. Even if it blows a seal or it misfires or the oil runs out, if you have a problem the engine will still make some form of power for an amount of time, enough to get you that little extra distance and quite possibly save your life.
A piston engine that throws connecting rod or something of the like will literally tear itself to pieces, immediately lose all power and depending on the damage even eject pistons or other parts out the side of the aircraft.
it's also quieter and the frontal profile is much much smaller that lets you design more aerodynamically.
but there are still tradeoffs, you need to water cool it and you need a gearbox to get the engine revs down to normal prop operating speeds so the weight advantage doesn't exist.
reliability thru simplicity: it won't fail catasthophically because it's perfectly balanced. Even if it blows a seal or it misfires or the oil runs out, if you have a problem the engine will still make some form of power for an amount of time, enough to get you that little extra distance and quite possibly save your life.
A piston engine that throws connecting rod or something of the like will literally tear itself to pieces, immediately lose all power and depending on the damage even eject pistons or other parts out the side of the aircraft.
it's also quieter and the frontal profile is much much smaller that lets you design more aerodynamically.
but there are still tradeoffs, you need to water cool it and you need a gearbox to get the engine revs down to normal prop operating speeds so the weight advantage doesn't exist.
