Rotary vs Piston
09-24-02, 01:19 PM
#26
Three spinning triangles
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Originally posted by Red Rotary Rocket
If you're interested, here is what the power curve for the new Renesis engine is supposed to look like...not very peaky at all...
If you're interested, here is what the power curve for the new Renesis engine is supposed to look like...not very peaky at all...
09-24-02, 07:04 PM
#27
Senior Member
It's amazing how when everyone heard about how much torque the renesis had (me too) said god-damn thats nothing the torque sucks!
But it has one of the smootest torque curves I have ever seen 80% (don't flame on the %) is availble just after Idle!! Damn!
That will deffinatly get that 2900lb hunk of junk of the line pretty nicely.
Rotary VS Piston is a moot point because it really doesn't matter no matter what any of us here think other people will always say thats wrong. This is just what we do us few rotor heads against the piston poppers, rednecks, and ricers. This is all that said is that we will probaly be the minority of gearheads for decades to come.
But it has one of the smootest torque curves I have ever seen 80% (don't flame on the %) is availble just after Idle!! Damn!
That will deffinatly get that 2900lb hunk of junk of the line pretty nicely.
Rotary VS Piston is a moot point because it really doesn't matter no matter what any of us here think other people will always say thats wrong. This is just what we do us few rotor heads against the piston poppers, rednecks, and ricers. This is all that said is that we will probaly be the minority of gearheads for decades to come.
10-02-02, 02:13 PM
#28
13B N/A POWA!
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I agree with protlewski, it doesn't really matter what a bunch of "hummers" (doesn't sound right I know) thing when the boingers look at it (remember the old commercial, the piston goes boing, but the rotary...blah blah blah). And oh yea DAMN that's a nice curve!
10-02-02, 06:03 PM
#29
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The best thing a piston engine has going for it is the flexibility to alter almost anything you want. Whereas with a rotary, because it is less common, you cannot easily make new parts for it, like say 14.5: compression rotors. Or stroking the E-shaft 
There comes a point where the 13B will only make so much power, same with a piston engine. With the piston engine, you can add more displacement. with a rotary you can't, you have to add more rotors. And it's quite difficult because nobody is 'used' to doing it
Both have one thing in common though, they can both be revved higher to extract more power.
Although the piston engine has more of an advantage in this area, because it is travelling so fast and has a very small combustion area. It is less sussceptible to detonation the higher you spin an engine and the smaller you make the quench area the more resistant to detonation it is.
On a rotary the combustion 'area' is huge and the rotor spins at 1/3 the speed of the of the e-shaft. This is what makes it so prone to detonation. If all of this were to occur faster, detonation has less of a chance to happen.
which brings me to one bad point I hate about the rotary, the shape of the chamber makes the seal jump 'over the hump' at high RPM. catastrophic failures can happen because of this. But piston engines have cams and belts and ******* headgaskets (**** I hate headgaskets)
so you can't win with either, I want the perfect engine, I'll never get it.
There comes a point where the 13B will only make so much power, same with a piston engine. With the piston engine, you can add more displacement. with a rotary you can't, you have to add more rotors. And it's quite difficult because nobody is 'used' to doing it
Both have one thing in common though, they can both be revved higher to extract more power.
Although the piston engine has more of an advantage in this area, because it is travelling so fast and has a very small combustion area. It is less sussceptible to detonation the higher you spin an engine and the smaller you make the quench area the more resistant to detonation it is.
On a rotary the combustion 'area' is huge and the rotor spins at 1/3 the speed of the of the e-shaft. This is what makes it so prone to detonation. If all of this were to occur faster, detonation has less of a chance to happen.
which brings me to one bad point I hate about the rotary, the shape of the chamber makes the seal jump 'over the hump' at high RPM. catastrophic failures can happen because of this. But piston engines have cams and belts and ******* headgaskets (**** I hate headgaskets)
so you can't win with either, I want the perfect engine, I'll never get it.
Last edited by magnus; 10-02-02 at 06:05 PM.
10-03-02, 05:37 PM
#31
Senior Member
*spainish accent* I love to pleasure my e-shaft, I love to stroke it, feel it in my hands. Much the way you caress a woman. If you don't stroke your e-shaft enough it will flex and you engine will go boom like real fast.
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