Skip to content
 
If you can read this, either the style sheet didn't load or you have an older browser that doesn't support style sheets. Try clearing your browser cache and refreshing the page.

(C|Net)   The Wankel rotary engine spins its way to a comeback   ( cnet.com) divider line
    More: Cool, Internal combustion engine, rotary engine, Wankel engine, Automobile, range extender, gas-powered range extender, esoteric car tech, Wankel rotary engine  
•       •       •

3635 clicks; posted to Geek » on 03 Mar 2018 at 10:36 AM (33 weeks ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



60 Comments     (+0 »)
 
View Voting Results: Smartest and Funniest


Oldest | « | 1 | 2 | » | Newest | Show all

 
2018-03-03 08:06:33 AM  
Mazda goes mmmmmm
mazda 1973
Youtube ElkuWqhL9V8
 
2018-03-03 08:25:17 AM  
media.giphy.comView Full Size
 
2018-03-03 08:27:34 AM  
But wait... a gas engine in an electric car? How's that going to work?

Ummm...
 
2018-03-03 09:01:03 AM  
Shoe. Megaphone. Grunties.

/obscure?
 
2018-03-03 09:03:42 AM  
img.fark.netView Full Size

What a wankel.
 
2018-03-03 09:07:33 AM  

foo monkey: But wait... a gas engine in an electric car? How's that going to work?

Ummm...


Are there EVs where the gas engine is for range extension only?  Otherwise it's a hybrid.
 
2018-03-03 09:07:37 AM  
Rotary engines are known for low vibration, decent fuel economy and a small physical footprint,

WUT?

Our 85 RX-7 got about 17 MPG.

Rotary engines are awesome, but they're hardly fuel efficient.
 
2018-03-03 10:25:18 AM  
He stole the idea from Barney Coopersmith
 
2018-03-03 10:38:53 AM  
Wake me up when I can put a Mr. Fusion on my DeLorean and do the Kessel Run in less than 12 parsecs.
 
2018-03-03 10:39:03 AM  
Monty Python's Are You Embarrassed Easily?
Youtube 2gm29WZpBJc
 
2018-03-03 10:52:52 AM  

FlashHarry: Shoe. Megaphone. Grunties.

/obscure?


I don't think so?

Monty Python - Wankel Rotary Engine
Youtube cFTFSJHH0Js
 
2018-03-03 10:53:16 AM  
Make it ceramic and Hydrogen powered and you have a buyer
 
2018-03-03 10:59:53 AM  

Eddie Adams from Torrance: Rotary engines are known for low vibration, decent fuel economy and a small physical footprint,

WUT?

Our 85 RX-7 got about 17 MPG.

Rotary engines are awesome, but they're hardly fuel efficient.


And they're horrible on HC emissions.
 
2018-03-03 11:03:38 AM  
I could see this. They've had a few decades to improve on the design. The old ones had more torque in a small foot print. Since this isn't the main powerplant, this and a 5 gallon tank, should get you to where you can charge up your batteries.
 
2018-03-03 11:10:04 AM  
When I joined the reserves in 1986 this was my cap badge:

img.fark.netView Full Size


The bowed triangle behind the lightning bolt and cannons represents a Wankle rotor.
 
2018-03-03 11:10:17 AM  
Is his for real, or is it all just spin?
 
kab
2018-03-03 11:12:00 AM  

Catlenfell: I could see this. They've had a few decades to improve on the design. The old ones had more torque in a small foot print. Since this isn't the main powerplant, this and a 5 gallon tank, should get you to where you can charge up your batteries.


Torque is not a rotary engine's strong point.
 
2018-03-03 11:16:44 AM  
My first car was an 85 Rx7.  It wasn't fast enough to get into trouble!  So that was nice.

Moving up to a Stingray Corvette with a 350 felt amazing by comparison.  "Ohhh this is what a sports car should feel like!"

Here in Puerto Rico lots of people use rotary motors to swap in everything.  They have nothing for emissions equipment (no inspections here) and they turbo them.  It makes them pretty decent.  Yet I'd still take a V8.  I've just never understood the rotary except that they are "different".
 
2018-03-03 11:25:06 AM  
Good. I was getting tired of hybrids that go 'boing, boing, boing boing, boing, boing boing'.
 
2018-03-03 11:27:39 AM  

scanman61: And they're horrible on HC emissions.


They got a lot better with the RX-8.

All prior engines (carbureted and fuel injected) had an oil injection pump that dribbled crankcase oil down the intake to lubricate the apex seals. This obviously wasn't good for emissions, and it had a habit of clogging up catalytic converters. Back-pressure from that means lots of heat that kills the engine before it's time. My 1988 RX-7 had been straight-piped to remove the cats, and I also dosed the gasoline with some 2-stroke oil just to be on the safe side. The engine still gave up and shredded itself at about 150,000 miles.

The RX-8 made great improvements by having a computer-controlled oil injection system that would mist crankcase oil in precisely metered doses right into the intake stream with the gasoline. It was a finer control of the quantity of oil being burned just like Evinrude outboard engines have computer-controlled injection of 2-stroke oil. You could get a quantity of oil misted into the air charge that would entirely burn up as fuel in the engine, and what little hydrocarbons left in the exhaust gases would be easily taken care of by the catalytic converters. Even with that, the engine still wasn't good enough to pass Euro-6 emissions (or maybe it was Euro-5), so Mazda discontinued the RX-8 worldwide instead of trying to make it compliant. They weren't selling enough in the USA alone to justify continuing the RX-8.
 
2018-03-03 11:35:57 AM  

mrmopar5287: scanman61: And they're horrible on HC emissions.

They got a lot better with the RX-8.

All prior engines (carbureted and fuel injected) had an oil injection pump that dribbled crankcase oil down the intake to lubricate the apex seals. This obviously wasn't good for emissions, and it had a habit of clogging up catalytic converters. Back-pressure from that means lots of heat that kills the engine before it's time. My 1988 RX-7 had been straight-piped to remove the cats, and I also dosed the gasoline with some 2-stroke oil just to be on the safe side. The engine still gave up and shredded itself at about 150,000 miles.

The RX-8 made great improvements by having a computer-controlled oil injection system that would mist crankcase oil in precisely metered doses right into the intake stream with the gasoline. It was a finer control of the quantity of oil being burned just like Evinrude outboard engines have computer-controlled injection of 2-stroke oil. You could get a quantity of oil misted into the air charge that would entirely burn up as fuel in the engine, and what little hydrocarbons left in the exhaust gases would be easily taken care of by the catalytic converters. Even with that, the engine still wasn't good enough to pass Euro-6 emissions (or maybe it was Euro-5), so Mazda discontinued the RX-8 worldwide instead of trying to make it compliant. They weren't selling enough in the USA alone to justify continuing the RX-8.


The Wankel's HC problems have nothing to do with oil, it's a result of lower chamber temps causing poor vaporization of the intake mixture.

The lower chamber temps (plus poor exhaust scavenging) also resulted in lower NOx emissions.

I used to do emissions failure repairs and I never once saw a rotary fail for NOx.  Saw a bunch of them fail for HC/CO because of degraded cats, but not one NOx fail.
 
2018-03-03 11:49:28 AM  
I thought Barney Coopersmith invented the rotary engine?

img.fark.netView Full Size


//such an underrated flick
 
2018-03-03 11:59:38 AM  
Oh good.  I guess Mazda was having too much success with reliability, emissions and performance; so they're bringing that pile of shiat back.
/rotary engines are trash
//personal experience
///YMMV
 
2018-03-03 12:50:21 PM  
Could this be something you could tow? Like a small two wheel trailer, only a few feet long? Could be a neat way to add-in some range when needed. Could also be a disaster.
 
2018-03-03 12:56:30 PM  

ThreadSinger: Could this be something you could tow?


If it's a Mazda rotary, then the answer is yes.
 
2018-03-03 12:58:28 PM  

Bovine Diarrhea Virus: Oh good.  I guess Mazda was having too much success with reliability, emissions and performance; so they're bringing that pile of shiat back.
/rotary engines are trash
//personal experience
///YMMV


images.cdn.circlesix.coView Full Size


They won the 24 hour le Mans race with a rotary engine. It also looked hella cool at night, everytime it shifted gears (pictured). But obviously it had a similar fuel economy as everyone else, it was just more reliable and faster, which caused it to win.
 
2018-03-03 01:04:56 PM  
And the motor oil manufacturers rejoiced.
 
2018-03-03 01:23:24 PM  

Unobtanium: Mazda goes mmmmmm
[Youtube-video https://www.youtube.com/embed/ElkuWqhL​9V8]


what goes around...
 
2018-03-03 01:27:41 PM  

FlashHarry: Shoe. Megaphone. Grunties.

/obscure?


I see you attended the Institute of Going a Bit Red in Helsinki.
 
2018-03-03 01:38:47 PM  
Heh, heh. Heh, heh. Wankel.
superawesomevectors.comView Full Size
 
2018-03-03 02:01:33 PM  
img.fark.netView Full Size
 
2018-03-03 02:26:05 PM  

enry: Are there EVs where the gas engine is for range extension only? Otherwise it's a hybrid.


Yes, the BMW i3, the world's 2nd ugliest car, has an option for a gas range extender. The gas tank is tiny, so it doesn't even double the range.
 
2018-03-03 02:31:28 PM  

Tyrosine: When I joined the reserves in 1986 this was my cap badge:

[img.fark.net image 222x300]

The bowed triangle behind the lightning bolt and cannons represents a Wankle rotor.


Huh, my grandad served in RCEME in WWII.  Not quite the same badge, though.
 
2018-03-03 02:48:32 PM  

natazha: Yes, the BMW i3, the world's 2nd ugliest car


..what's the first?
 
2018-03-03 02:49:19 PM  

Eddie Adams from Torrance: Rotary engines are known for low vibration, decent fuel economy and a small physical footprint,

WUT?

Our 85 RX-7 got about 17 MPG.

Rotary engines are awesome, but they're hardly fuel efficient.


Was gonna say the same. If you get more than 22mpg in an RX8 you're lucky.

A small turbo'd I4 would be much more suitable as a range extender.
 
2018-03-03 03:02:36 PM  
We have two Chevy Volts, 2014 and 2017. Perform exactly as advertised. Range is a tad over 300 miles. Smae concept as diesel-electric trains. Battery range summer 2014 = 42 miles; 2017 =55 miles. Current MPG 2014 = 67mpg over 35,000 plus miles including Dallas to Prince Edward Island and back, Current on 2017 is 135MPG over 5,700 miles.
 
2018-03-03 03:15:23 PM  

Eddie Adams from Torrance: Rotary engines are known for low vibration, decent fuel economy and a small physical footprint,

WUT?

Our 85 RX-7 got about 17 MPG.

Rotary engines are awesome, but they're hardly fuel efficient.


Came to say this, or reliable. Hopefully they make it accessible and user replaceable.

I liked the idea of the microturbine generation that a couple companies are using in start-stop trucks (like trash collection) and busses where electric motors are perfect. Combustion motors are awful in start-stop and turbines can have excellent efficiency at a fixed speed if you can make use of the heat and a small footprint.
 
2018-03-03 03:41:58 PM  

dyhchong: Eddie Adams from Torrance: Rotary engines are known for low vibration, decent fuel economy and a small physical footprint,

WUT?

Our 85 RX-7 got about 17 MPG.

Rotary engines are awesome, but they're hardly fuel efficient.

Came to say this, or reliable. Hopefully they make it accessible and user replaceable.

I liked the idea of the microturbine generation that a couple companies are using in start-stop trucks (like trash collection) and busses where electric motors are perfect. Combustion motors are awful in start-stop and turbines can have excellent efficiency at a fixed speed if you can make use of the heat and a small footprint.


Problem with turbines is the smaller you for, the less efficient they are. They're great for high loads with long duration, but for small scale in a car they'd be horrible.
 
2018-03-03 03:48:59 PM  

dj495ufj3: dyhchong: Eddie Adams from Torrance: Rotary engines are known for low vibration, decent fuel economy and a small physical footprint,

WUT?

Our 85 RX-7 got about 17 MPG.

Rotary engines are awesome, but they're hardly fuel efficient.

Came to say this, or reliable. Hopefully they make it accessible and user replaceable.

I liked the idea of the microturbine generation that a couple companies are using in start-stop trucks (like trash collection) and busses where electric motors are perfect. Combustion motors are awful in start-stop and turbines can have excellent efficiency at a fixed speed if you can make use of the heat and a small footprint.

Problem with turbines is the smaller you for, the less efficient they are. They're great for high loads with long duration, but for small scale in a car they'd be horrible.


But they were so cool.....


megaparts.euView Full Size
 
2018-03-03 03:56:18 PM  

scanman61: dj495ufj3: dyhchong: Eddie Adams from Torrance: Rotary engines are known for low vibration, decent fuel economy and a small physical footprint,

WUT?

Our 85 RX-7 got about 17 MPG.

Rotary engines are awesome, but they're hardly fuel efficient.

Came to say this, or reliable. Hopefully they make it accessible and user replaceable.

I liked the idea of the microturbine generation that a couple companies are using in start-stop trucks (like trash collection) and busses where electric motors are perfect. Combustion motors are awful in start-stop and turbines can have excellent efficiency at a fixed speed if you can make use of the heat and a small footprint.

Problem with turbines is the smaller you for, the less efficient they are. They're great for high loads with long duration, but for small scale in a car they'd be horrible.

But they were so cool.....


[megaparts.eu image 850x637]


No argument there!
 
2018-03-03 04:52:35 PM  

swankywanky: I thought Barney Coopersmith invented the rotary engine?

[img.fark.net image 600x436]

//such an underrated flick


Nah- he invented a little doohickey on the artificial heart.
 
2018-03-03 05:57:20 PM  

enry: foo monkey: But wait... a gas engine in an electric car? How's that going to work?

Ummm...

Are there EVs where the gas engine is for range extension only? Otherwise it's a hybrid.


The Volt has been around for a while now.
 
2018-03-03 06:21:02 PM  

scanman61: Eddie Adams from Torrance: Rotary engines are known for low vibration, decent fuel economy and a small physical footprint,

WUT?

Our 85 RX-7 got about 17 MPG.

Rotary engines are awesome, but they're hardly fuel efficient.

And they're horrible on HC emissions.


But now that Wakanda is sharing Vibranium for the rotor tip seals, they're gonna be great!
 
2018-03-03 08:25:56 PM  

Bondith: Tyrosine: When I joined the reserves in 1986 this was my cap badge:

[img.fark.net image 222x300]

The bowed triangle behind the lightning bolt and cannons represents a Wankle rotor.

Huh, my grandad served in RCEME in WWII.  Not quite the same badge, though.


We switched back to the horse and ball about 1990 IIRC. The rebadging parade was the only time in 7 years I wore my summer dress uniform (our CO for most of my service was a former logistics officer with the Airborne Regiment and he kept us in the field 99% of the time which was just fine with me).

 
cdn.canex.caView Full Size
 
2018-03-03 09:55:08 PM  

Tyrosine: Bondith: Tyrosine: When I joined the reserves in 1986 this was my cap badge:

[img.fark.net image 222x300]

The bowed triangle behind the lightning bolt and cannons represents a Wankle rotor.

Huh, my grandad served in RCEME in WWII.  Not quite the same badge, though.

We switched back to the horse and ball about 1990 IIRC. The rebadging parade was the only time in 7 years I wore my summer dress uniform (our CO for most of my service was a former logistics officer with the Airborne Regiment and he kept us in the field 99% of the time which was just fine with me).

 [cdn.canex.ca image 800x800]


That is one confusing emblem. A lion-faced horse rampant on a ball-and-chain Earth? What's  that meant to signify?
 
2018-03-03 10:37:11 PM  

Tyrosine: When I joined the reserves in 1986 this was my cap badge:

[img.fark.net image 222x300]

The bowed triangle behind the lightning bolt and cannons represents a Wankle rotor.


It's a Realeaux Triangle. It's a common element of gothic architecture.
 
2018-03-04 01:04:56 AM  

EdwardTellerhands: Tyrosine: Bondith: Tyrosine: When I joined the reserves in 1986 this was my cap badge:

[img.fark.net image 222x300]

The bowed triangle behind the lightning bolt and cannons represents a Wankle rotor.

Huh, my grandad served in RCEME in WWII.  Not quite the same badge, though.

We switched back to the horse and ball about 1990 IIRC. The rebadging parade was the only time in 7 years I wore my summer dress uniform (our CO for most of my service was a former logistics officer with the Airborne Regiment and he kept us in the field 99% of the time which was just fine with me).

 [cdn.canex.ca image 800x800]

That is one confusing emblem. A lion-faced horse rampant on a ball-and-chain Earth? What's  that meant to signify?


Got to catch them all.
 
2018-03-04 04:08:11 AM  
I had an RX-8. It was terrible. Might be the worst purchase I ever made in my life. There was nothing good about that engine, and when things went wrong, holy shiat did they ever go wrong.
 
2018-03-04 08:56:55 AM  

BullBearMS: [Youtube 2gm29WZpBJc image 480x360][Youtube-video https://www.youtube.com/embed/2gm29WZp​BJc]


Still makes me laugh like an 8-year-old.
 
2018-03-04 11:58:03 AM  
I wonder how many mechanics can do a good job fixing those things.

And by "fix" I mean actually get it running again, not swap in a Chevy 350 and hope nobody notices.
 
Displayed 50 of 60 comments


Oldest | « | 1 | 2 | » | Newest | Show all


View Voting Results: Smartest and Funniest

This thread is archived, and closed to new comments.

Continue Farking





On Twitter



Top Commented
Javascript is required to view headlines in widget.
  1. Links are submitted by members of the Fark community.

  2. When community members submit a link, they also write a custom headline for the story.

  3. Other Farkers comment on the links. This is the number of comments. Click here to read them.

  4. Click here to submit a link.

Report