ROSHX7

I know our cars got 2, the COSMOS got 3 and the Mazda Race Car got 4, is there such a thing as a SINGLE ROTOR motor? Or how about 5 or 6 Rotor motor? Are the ROTORS made in "one size fits all" or do some engines have bigger rotors then others?

flubyux2

in the VERY VERY beginning, there were single rotors. and one mechanical institute or college came up w/ a single rotor eingines w/ like a half-inch of displacement. it was like the size of a quarter.

i dont know about 5 rotors tho.

i know there was a 4 rotor corvette stingray. maybe 2 of them.

chris

fc3s.org

The Cosmo's also had 2 rotor 13B-RE twin turbo engines as well. Kinda like a Camry has a 4 banger and a 6 banger...the cosmo has a 2 rotor and a 3 rotor

There was a suzuki single rotor motorcycle.

ROSHX7

A DOMESTIC car had a Rotary engine???!

Ok, maybe you guys can ANSWER this other puzzling question too. If we got only 1.3L of displacement...why is our cars bad on gas? Cause a 1.3L Suzuki Swift is like SO MANY times better on GAS...why?

Node

iTrader: (1)

rotaries are fuel hogs, not exactly right comparing a rotary to a piston with just numbers.

and yes many companies ventured into the land of rotaries, chevy was one of them.
www.monito.com has alot of info on rotaries
and there is a rotary motorcycle (actually a few) and chainsaws, and a bunch of other stuff, mazda isnt the only rotary company, just the only one to stick with it and go big.

wankelhead

as far as rotor size,the first gens with the 12a motors have smaller rotors,as far as i know all the rest are the same size rotors[of course the different years had different compression depending on model/year.and different weight]hmm.maybe somebody could build a 6 rotor..hehe.just keep stackin'em on there.u know,get a pile of intemidiate housing,bunch of rotors,couple of endhousing....hmm.hehe.i guess making a custom ecentric shaft would take some doing.then,graft on a foot on the front of the car...ugh.wait.i just had that sick fealing in my stomach.i better stop while i'm ahead.

JerryLH3

iTrader: (11)

It was a prototype back when everyone thought the rotary was the wave of the future.

The 1975 Chevy Monza was extremely close to coming with a rotary engine in production trim. Plans were nixed at the last minute.

Evil Aviator

1) Rotary engines fire all of their rated displacement per rev like a 2-stoke piston engine does. Four-stroke piston engines only fire half of their rated displacement. Therefore, a 1.3L rotary is like a 2.6L 4-stroke piston engine. This is why most racing establishments consider the 13B as a 2616cc engine.
2) The Suzuki Swift only has 79 peak HP.

Some single rotors:
http://www.atkinsrotary.com/onerotor.htm
http://www.osengines.com/engines/osmg1400.html

I don't know of any production 5 or 6-rotor engines, but a skilled machinist could certainly make an engine with just about any number of rotors, although I'm not sure how practical that would be. I think that I remember somebody posting a link to custom-made engines, so you may want to try a search on this site, possibly in the Lounge.

Node

iTrader: (1)

http://www.hurley-engineering.ltd.uk/

Evil Aviator

Ah, I should have known.

BTW, good old Eamon made a custom 3-rotor back in the day when a Mazda 3-rotor cost 10x more than they do from Corksport nowadays.

ROSHX7

MAN, you GUYS do know EVERYTHING!!! Wow, I'm impressed!

flubyux2

every time one rotor makes a complete revolution, it fires 3 chambers. multiply that by our 2 rotors, its like having a V6.

no one has Ever been able to accuratly classify our engine just cuz of the weird design. people argue that it has more displacement than others. the basically just classified it by the displacment of the power stroke on each rotor. since you can only fire ONE side of the rotor at a time, the took ONE chamber volume for each rotor. 652ccX 2 rotors= 1300. since this is the second design of the 1300 displacement, its the 13 B. get it?

the amount of HP an engine makes is directly related to its Brake specific fuel consumption. so basically, the more HP you make, the more Fuel u consume, and vice versa. our cars came w/ 2x as much HP as the Suzuki. even MORE so for the Series 5.

just think, GM was thrilled when they made the 283 HP 283 cid Corvette w/ Mech FI back in the 50s. our engines are WAY more efficient than that now. thats was 1HP per Cubic inch. our cars are aproxximately 80 cubic inches. 146/80 cid= 1.825 HP per Cubic inch. i say we got something over the Domestic guys. we need to capitolize on this! lol

GM and suzuki werent the only people experimenting w/ rotors. i remember Nissan had a collection of like 6 cars running w/ rotaries, a few others did too. but no one could get their rotarires to SEAL, and get half way decent milage.

the problem was the side seals, and the crevices between the rotors and intermediate housings. they colleced unburnd fuel and HC, which is why our cars have horrible emissions today. but its STILL way better than its first years.

chris

Evil Aviator

Yeah, but the eccentric shaft output rotates 3x faster than the rotors, so only 2 rotors (chambers) fire per revolution of the output shaft. This is why IMO it is more like a 4-stroke 4-cylinder piston engine, which also fires 2 chambers per revolution of the output shaft. If you hook up an aftermarket tach or EMS to your 2-rotor, you need to set it to "4-cylinder" mode, unless it happens to have a "2-rotor" mode.

I classify it as a "Wankel" engine.

Aaron Cake

iTrader: (1)

The 4 rotor GM car was called the Aerovette. It was a Corvette type car that resembled the Stingray, except with gullwing doors. GM cancelled the project because of the fuel consumption of the vehicle, and the fact that it was faster than the Corvette. Remember, GM has a policy that prevents them from making something faster than the Corvette.

I am currently working on a single rotor 12A (6A?) for use in my new go-kart. The only problem is finding someone who will make the eccentric shaft...

Node

iTrader: (1)

Silva S11 ;-)
I wonder if US has em...

SIX TWO SLEEPER

In the early-70's GM was working on rotary Corvettes. One was a odd-looking red prototype made by Pininfarina (not one of Pinin's best designs tho, a alfa 164 looks a million times better) with the two rotor vega motor. Another was a
GM Styling -made vehicle, with a four-rotor motor (two vegas). The engine was mid-mounted (unlike front motor pinin) and the car was a hatchback. It had a cool star-wars like interior.

The projects were nixed, and the two-rotor was destroyed (like 99 percent of GM prototypes, sadly) the four-rotor had the engine remouved (no one knows where it went) and a Chevy 454 bolted to an Olds Toronado transaxle (the 425 was the same as for rotary) and renamed "Aerovette" instead of the gm prototype code (which is always "XP-xxxx" )

check this out: http://www.monito.com/wankel/

and here is a list of the various production and prototype and experimental wankel motors of Dr. Wankel, Mazda and NSU (There may be some Daimler-Benz and GM in here too)

http://www.monito.com/wankel/engines.html

Snrub

iTrader: (1)

I think NSU and Lauda both had one or more single rotor production engines?

This shows NSU did.
http://www.monito.com/wankel/spider.html

flubyux2

"my name is uhhhmm..Mr....snnnnrub, yea, thats it..."

rotors are cool. its really hard to classify this engine or any of its types. mainly cuz only a small percentage are educated properly about it. i mean, sometimes i classify it as a 2-cycle engine since it has no valves, and injects oil with the fuel.

and sometimes i think of it as a V6 cuz it has 3 firing faces on 2 rotors. and i guess sometimes i could think of it as a v4? well, 4 cylinder since it fires 4x per E-shaft revolution.

no one know what the rotary engine is like, and the only way i can describe it to Non-rotorites is "just picture a Spirograph. its the triangle inside the circle ring"

thats the only way i can describe it unless i get SUPER technical, which just confuses everyone.

chris

turboren

Contact Paul Yaw (if you can get in touch with him -- good luck, always busy). He built a one-rotor for an airplane, I think. He may even still have the pix on his web page, it you can find that. It used to be:

http://www.theriver.com/riverusers/~yawpower/

but apparently is no longer there. E-mail me off list and I'll give you his #.

Also, keep in mind besides e-shaft, you have to fabricate custom intake (obviously), oil pan, and tension bolts.

Ren
turboren@yahoo.com