Octane: what it actually means and does
07-25-2011, 09:53 PM
#101
3-wheeler
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thats not correct, todd.
The combustion shoves the rotor. the rotor moves towards the exhaust port because of the gearing. the expanded gases spill out the exhaust ports because that path is open.
when the next combustion event happens then the rotor takes over(because the other combustion event is pushing it) sweeping whats left in the chamber(whatever didn't have time to flee out the exhaust port) around for another ride
The combustion shoves the rotor. the rotor moves towards the exhaust port because of the gearing. the expanded gases spill out the exhaust ports because that path is open.
when the next combustion event happens then the rotor takes over(because the other combustion event is pushing it) sweeping whats left in the chamber(whatever didn't have time to flee out the exhaust port) around for another ride
For what it's worth, the discussion here has been informative. I admit that these are aspects of rotary combustion I've not considered before so I don't see the discussion as futile.
07-27-2011, 06:44 AM
#111
I feel dumber from some posts
In regards of knock, if I understand correctly: determining factor if engine will knock on given fuel is charge density and temperature after dynamic compression? Of course not considering dilution, homogeneity of charge, timing...
In regards of knock, if I understand correctly: determining factor if engine will knock on given fuel is charge density and temperature after dynamic compression? Of course not considering dilution, homogeneity of charge, timing...
07-27-2011, 10:16 AM
#113
my point in posting that statement is that there is a lot of difference of "opinion" out there. Even from recognized experts.
That statement came directly from Paul Yaw. I think he is well recognized and accepted as a pretty good authoritive on the rotary engine?
Personally I agree with that statement, but some people will want too put their own spin on it. Some may not be able to interprete that statement correctly. Some will argue about it, detail after detail-like the worst politician in the world.
.
Everyone can believe whatever they want too. Its none of my business what they believe.
By the way I dont come on this forum to do "battle" so to say I dont choose my battles well is very reflective and I thank you for that.
If people that read this thread want some good factual information about the main topic--then go to Pauls tech papers--he has one on gas/ignition in which he speaks of octane in great detail.
That statement came directly from Paul Yaw. I think he is well recognized and accepted as a pretty good authoritive on the rotary engine?
Personally I agree with that statement, but some people will want too put their own spin on it. Some may not be able to interprete that statement correctly. Some will argue about it, detail after detail-like the worst politician in the world.
.
Everyone can believe whatever they want too. Its none of my business what they believe.
By the way I dont come on this forum to do "battle" so to say I dont choose my battles well is very reflective and I thank you for that.
If people that read this thread want some good factual information about the main topic--then go to Pauls tech papers--he has one on gas/ignition in which he speaks of octane in great detail.
Last edited by olddragger; 07-27-2011 at 10:33 AM.
07-27-2011, 11:03 AM
#114
Release the twins.
07-27-2011, 12:53 PM
#115
That does not mean they can espouse those beliefs without challenge and I believe it is the responsibility of those that know better to defend the facts so that those factually incorrect beliefs do not get canonized by those that do not know better.
I guess that depends on who you ask. There are some well-placed individuals in the rotary world that depended on Paul's authoritative position and got toasted pretty badly.
07-27-2011, 03:52 PM
#118
lol. Those that know better? Thats another opinion.
People need to educate themselves and in order to do that, an open mind in needed. Some people have more of an open mind than others and some people will learn more than others. Whatever.
I hope that any rotary owner will do a lot of studying, networking, observing, hands on work and then apply their own ideas to their own questions. Hopefully they will share their results with the rest of us.
Unfortunately the best information concerning octane is not on this forum.
People need to educate themselves and in order to do that, an open mind in needed. Some people have more of an open mind than others and some people will learn more than others. Whatever.
I hope that any rotary owner will do a lot of studying, networking, observing, hands on work and then apply their own ideas to their own questions. Hopefully they will share their results with the rest of us.
Unfortunately the best information concerning octane is not on this forum.
Last edited by olddragger; 07-27-2011 at 04:06 PM.
07-27-2011, 06:31 PM
#119
Administrator
i suppose thats one view, of course it depends on what your looking for. but just go run an advanced search for posts from me using the word octane. maybe not the best available anywhere on the net but you'll have some pretty damn good info
here's a smattering
https://www.rx8club.com/showthread.p...ne#post2575047
https://www.rx8club.com/showthread.p...ne#post3695509
actually just page one of this very thread should do it. up to about post 25 everything was good.
https://www.rx8club.com/showthread.p...ghlight=octane
these two papers
https://www.rx8club.com/attachment.p...1&d=1311810406
http://www.epa.gov/otaq/presentation...-isaf-no55.pdf
of course stealth's posts are always spot on on the subject
https://www.rx8club.com/showthread.p...ne#post3424016
oh and this post https://www.rx8club.com/showthread.p...ne#post2213002 ill put it here so you can scroll back that thread and read the whole subject and make sure to read the info in Jeff Hartmans book in the link
in fact read that whole thread. its pretty damn good
here's a smattering
https://www.rx8club.com/showthread.p...ne#post2575047
https://www.rx8club.com/showthread.p...ne#post3695509
actually just page one of this very thread should do it. up to about post 25 everything was good.
https://www.rx8club.com/showthread.p...ghlight=octane
these two papers
https://www.rx8club.com/attachment.p...1&d=1311810406
http://www.epa.gov/otaq/presentation...-isaf-no55.pdf
of course stealth's posts are always spot on on the subject
https://www.rx8club.com/showthread.p...ne#post3424016
oh and this post https://www.rx8club.com/showthread.p...ne#post2213002 ill put it here so you can scroll back that thread and read the whole subject and make sure to read the info in Jeff Hartmans book in the link
in fact read that whole thread. its pretty damn good
Last edited by zoom44; 07-27-2011 at 06:47 PM.
