View Full Version : Why do the rotars spin in opp. directions?


PoLaK
12-17-2002, 08:35 PM
I was watching a few videos and i couldn't find a resonable explination within the depths of my head... who can.... i would think that spinning in oppisite directions would slightly unbalence the car?

fuz
12-17-2002, 08:44 PM
Opposite? Which video are you watching?

tallguylehigh
12-17-2002, 09:10 PM
Actually, I think quite the opposite would be true. The rotors are spun in opposite directions to cancel out the vibrations each individual rotor makes. At least that is my guess, although I don't really know how you explain an odd number of rotors then...:confused:

PoLaK
12-17-2002, 09:28 PM
Im trenton, NJ almost 16 stay in touch on the forum when we get the rx-8 perhaps we'll start a lil club with herc and his leased car hahahah.

Good point about canceling out eachother but is that right, Ikuo Maeda you wouldn't happen to be a member on the forum?

Buger
12-17-2002, 11:23 PM
Umm... both rotors use the same eccentric shaft and spin in the same direction. It would be cool to see some videos that showed otherwise though. Can you post some links? :)

Below is a link of one that shows that the go in the same direction:

http://www.rotaryengineillustrated.com/animations/IGN4a2-s.mov

Brian

Sputnik
12-18-2002, 07:19 AM
Originally posted by Buger
Umm... both rotors use the same eccentric shaft and spin in the same direction... No shit.

It's physically impossible for the rotors to spin in opposite directions with the eccentric shaft designed the way it is.

---jps

zoom44
12-18-2002, 10:45 AM
Originally posted by Buger
Umm... both rotors use the same eccentric shaft and spin in the same direction. It would be cool to see some videos that showed otherwise though. Can you post some links? :)

Brian
mazda has a vid somewhere where an animated renesis splits in half beteen the rotors and opens like a book. once its open it appears that one rotor is going clockwise and one is going counter clockwise. its just an optical illusion caused by looking at one rotor from the "front" and the other from the "back". sometime ago i was confused by this too until someone alse pointed it out to me. hope that helps.:cool:

Cihuuy
12-18-2002, 11:24 AM
Both rotor should spin in one direction... :p hehe I agree wiv zoom44 that the video of the renesis engine has been split and therefor make it seem as though it rotates in different direction... :cool:

PoLaK
12-18-2002, 01:14 PM
optical illusion it was sry bout the moronic post

zoom44
12-18-2002, 01:32 PM
Originally posted by PoLaK
optical illusion it was sry bout the moronic post
no worries mate you weren't the only one who was misled

mjcampb
03-03-2007, 05:33 PM
Sometimes it's fun to bump these oldies. Remember when we were all learning how rotaries worked? Holy cow, it's been five years already.

rglbegl
03-03-2007, 06:24 PM
holy thread resurrection batman

PoLaK
03-03-2007, 06:32 PM
Sometimes it's fun to bump these oldies. Remember when we were all learning how rotaries worked? Holy cow, it's been five years already.Holy smokes batman is right, i was so cute and innocent :boink:

Raptor2k
03-03-2007, 07:07 PM
Haha, I guess all of us were n00bs once

Easy_E1
03-04-2007, 11:45 AM
I was a noob to the Rotary in 1977.

Winfree
03-05-2007, 12:14 AM
Easy - one drives the car forward, one drives it in reverse!
Indecision is why they don't make triple rotaries.....

Raptor2k
03-05-2007, 12:38 AM
I was a noob to the Rotary in 1977.

http://img283.imageshack.us/img283/97/whatafunnybabyfn3.gif

flomulgator
03-05-2007, 01:00 AM
Easy - one drives the car forward, one drives it in reverse!
Indecision is why they don't make triple rotaries.....
Even though wrong, I like the direction this is heading!

...because at 9k the combined spin would create a black hole!

Because it would throw Chuck Norris off balance during spin kicks!

StewC625
03-05-2007, 01:46 PM
Sometimes it's fun to bump these oldies. Remember when we were all learning how rotaries worked? Holy cow, it's been five years already.

Holy cow, I learned how Rotaries worked when I built a Testor's model kit of the wankel engine in 1973, when Mazda was selling "cars that go Hmmm ..."

And then I learned first hand how they worked when I bought my first RX sports car - a 1985 RX-7 - generation 1.1.

Stew

Winfree
03-05-2007, 03:35 PM
Even though wrong, I like the direction this is heading!

...because at 9k the combined spin would create a black hole!

Because it would throw Chuck Norris off balance during spin kicks!

If both spun in the same direction the car would fly like it does in Russian movies.

They spin in opposite directions to create enough lift to counter the downward force of the spoiler - lack of oppositing rotaries is why the 1995 Ford Tarus needs an oversized spoilers!

They spin in opposite directions so the front wheels can go one direction on a curve while the rear wheels go the opposite direction - that is why 8s drift so easily!

Cattywampus
03-05-2007, 05:58 PM
Opposite? Which video are you watching?
He was rewinding it while looking at the tv. :)