The Differences Between Piston and Rotary Engines

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Car Throttle

Car Throttle

Prije 4 godina

Rotary engines have featured in some of the world's coolest cars, but how do they compare to their piston-engined counterparts?
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For even more info on rotary engines, check out Engineering Explained's video:
www.youtube.com/watch?v=sd6pJ...

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----- Credits -----

VW Polo Engine
bit.ly/2i15w5d

Audi 2.0 TSFI bit.ly/2AyoR5H

RS3 Engine
bit.ly/2yOZOhs

BMW M3 Engine
bit.ly/2qGV3SD

V6 Engine
bit.ly/2zMi5fm

V8 Engine
bit.ly/2hjmR8I

V10 Engine
bit.ly/2zzeb6q

V12
bit.ly/2zyFwWx

Mazda Rotary Engine
bit.ly/2Aqf1lp

Black sheep
bit.ly/2hpQ3yT

RX8 Mazda Walk Around
bit.ly/2jguZvd

Kia Pride
bit.ly/2zxfftF

Jaguar E Type Rotor
bit.ly/2mchz4t

Baby Sad Face
bit.ly/2AzY2Oo

Well
bit.ly/2jeewr8

List
bit.ly/2iN61iO

Goat
bit.ly/2yOGJvV

Old Rotary Engine
bit.ly/2ypmsbK

Desert
bit.ly/2ztD2v6

Man Crying
pixabay.com/en/guy-man-people...

Mazda 50 years of Rotor
bit.ly/2yqAlGJ

Crack
bit.ly/2hkLm5I

Pointing
bit.ly/2zNuLT7

And a huge thanks to the CTzens below for submitting their videos!
13b Turbo Mazda - Patrick
RX8 Spitting Flames - MOHAMMAD RASHID NEELOY
Merc Engine - TARJEI SKOTTERUD
Valve Springs - MARK GIBBS
RX7 - FELIX GROSSHANS
RX7 - Burn Out - ALBERT SAAVEDRA
RX7 - Red - Noise - Lenny Eceb
Engine on Fire - RYAN ALLAN
Engine No Exhaust - JORDAN NORTHCOTE
Compression Test - SAULIUS GED
Smoking car - NICHOLAS KARAFILOV
Oil Honda - NICHOLAS JOHNSON

Komentari: 3 395
Kratoskiller231
Kratoskiller231 Prije 2 godina
I am a redstone master! I already know everything about a piston!
Faheem Jamaloodeen
Faheem Jamaloodeen Prije 4 godina
My friend owns an RX7 and knows a guy who owned an RX7 FC. The guy ended up getting a turbo for it and cranked the boost up to 24 PSI which was higher than the maximum of 23 PSI. The same guy got into a drag race with a Camaro. The FC smoked the Camaro but at the end of the drag race he heard a shredding sound inside his engine. The car could barely move after that so he ended up taking apart the engine to diagnose the problem. Turns out because he cranked the boost up so high the apex seal was blown right out of its socket as it couldn't handle the pressure. The rotor then dragged the apex seal around the entire housing which shredded the interior completely. He ended up replacing the rotor and still has the one with the shred marks and gashes sitting on his desk at home.
byaialele
byaialele Prije 3 godina
Hopefully Mazda can find a way to fix the rotary engine flaws for their rx-9.
AllorFh
AllorFh Prije 2 godina
The main benefit of a rotary: what is a redline? never heard of it
Paul B
Paul B Prije 2 godina
The only advantage that the rotary engine has is that you can add "banks" (more rotors) to increase displacement without taking up much space. Thus a "4 cylinder" equivalent can become a "6 cylinder" by adding a single rotor to the mix.
Malcolm Abram
Malcolm Abram
Thank you for this. I have worked on a number of engines, and the cylinder heads have always been concave, not convex as in your diagram. Being concave causes fuel ignition to be 'cupped' leading to a more efficient use of the power stroke.
Crazy_Borg
Crazy_Borg Prije 4 godina
Only disadvantage of the APEX seals: They not easily replaceable.
NordvestGaming
NordvestGaming Prije 4 godina
Thanks! Im just getting into cars and this really helped me understand how they actually work mechanicaly
Jay Vette
Jay Vette Prije 4 godina
Another advantage of rotaries: power density. Rotaries make a lot of power for their size. Another disadvantage: Because they rev higher, they don't make a lot of torque compared to piston engines.
scottthewaterwarrior
scottthewaterwarrior Prije 2 godina
I just love the look of the RX-7, one of the few modern "rounded" cars that looks good (plus it has pop-up headlights!) but if I ever bought one I'd probably get a less oil burning engine put in. After the original one fails of course, no point in removing a perfectly good engine!
Garrett Box
Garrett Box Prije 4 godina
I once argued with my science teacher about this. He was telling us how engines work, and had said that all engines have pistons. I should have kept my mouth shut, but at this time I felt the need to correct him, and said that not all engines have pistons, and had told the class about rotaries. He had gone on to say that even rotaries have pistons, and that led to a pretty big argument. I wound up staying after class to explain this to him, and he had maintained his idea of being right. I eventually chose to be the bigger person and tell him that he was right.
AK- JXRDY-7
AK- JXRDY-7 Prije 4 godina
Thank you for this! Been into cars for years, but I'm actually learning about the engines and all parts of cars.
Ghost Assassin
Ghost Assassin Prije 4 godina
I still like rotaries regardless of the disadvantages of them. Also, I heard the rotary is making a comeback but as a range extender. I have no idea how that would work, but I'm curious.
acynder1
acynder1 Prije 4 godina
A very entertaining video, I loved it. I would also like you to do in video explaining the electric motors and how much they differ from the internal combustion. Above all how they develop their power. Because many people are afraid that cars with electric traction have no gear change.
aladdin706
aladdin706 Prije 3 godina
Thank you for the video, Im studying what I think I should know about basic engine components, functions, flaws and differences and because of your knowledge on both rotary and piston driven engines, I now know basic understanding of how they work as well as basic flaws due to certain situational awareness. Thank you for the video again and please if you have the knowledge to do so, can you make a video on jet engines? Or difference between a jet engine and a car engine. That is actually how I found this video. Thanks.
Dan J
Dan J Prije 2 godina
1.4 and 2 litres is a pretty narrow range. My first fiesta was 957cc and my current car is 2.4l, both inline fours
Maximilian Kohs
Maximilian Kohs Prije 4 godina
Friend of mine had an older RX-7 and as his apex seals cracked, he opened up the engine and replaced them with good old leather strips and never had any problems with the seals again. Even oil burn has been reduced!
Kmaaq
Kmaaq Prije 4 godina
I don’t own a rotary nor am I completely keeping up with them, but I’ve been reading that the apex seals problem is a thing of the past as aftermarket apex seals in the past couple of years have been vastly improved.
Marco Zolo
Marco Zolo Prije 2 godina
Now explain the difference between an antimatter warp drive vs a singularity based warp drive
177SCmaro
177SCmaro Prije 4 godina
For the record, rotary engines have a lot of moving parts too, just most of them are seals. Take a look at what is in a seal kit for a 13b sometime.
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