I had two thermo courses, which I did not group into the "fluids" category, just simply because they aren't often relating to fluid flow, more intensive on heat transfer and heat cycles. I agree though, thermo was one of my favorites.
Hello, glad you're interested. Unfortunately your questions are a bit too general to give a specific answer to. A wankel could have better/worse fuel economy and/or power than a V6. And yes, it can always output more power. Reduce friction, increase compression, forced induction, etc.
The engine still manages to pull in air, compress it, ignite it, and expel it... the four things it needs to do. Call it whatever you want, it doesn't directly compare with piston cylinders and isn't accurately described by "two strokes."
@danielsong25 That would be a logical statement, yes. For example the energy of moving a valve up and down is lost and must be compensated for in a piston cylinder engine, where as there are not intake/exhaust valves in a Wankel engine.
WONERFULLY EXPLAINED!!! I was attempting to explain this to my gf but her interest in cars is nill at best. she's slowly gaining more interest and somehow we got on this topic. lets just say the video explained what i've been trying to for the past 2hours. :D
@NicksCorvetteMan I agree completely, I think it's an incredible engine. Unfortunately there's no base, and not enough engineers working to make it efficient. No catastrophic failure; sounds like reason enough to use it in the racing scene.
Interesting question. I would think it may be a bit easier, since there are less parts. But developing the manufacturing process would be the major cost, and if the engine can't deliver, the overhead cost isn't worth it.
@EngineeringExplained I should note that although there are 3 power strokes per rotation of the rotor, there is one power stroke per rotation of the crankshaft. My first comment can be a little misleading in this sense.
Ever since I started massing with them with model aircraft, the Wankel Rotary system has been one of my favorites. While it doesn't get good gas mileage in real-world driving situations, and can be atrocious in stop + go driving (ask anyone who owned an RX7) for applications requiring consistent torque through the Otto Cycle (such as in small model aircraft) nothing else can really compete. Single cylinder model engines have a 2 stroke system that's worse on gas, and has to keep more momentum.
@EngineeringExplained 2 stroke engines have greater hp/liter because they fire twice as often as 4 stroke engines. (See Two-Stroke Engine - Explained) for more info on two-strokes. The more power strokes you have per crankshaft revolution, the more power you will produce!
You can actually see a simple form of this engine in operation in Warped Perception's UA-cam channel. He recorded the engine's various phases at 4k which are then shown at slow-mo. I have to say your explanations are very good.
@NicksCorvetteMan Haha, I originally wrote "Emissions? Weight?" But thought how could something be banned because it's too light. They should be allowed to place weights where they wish, not ban a design with advantages. Kills innovation.
No practice haha, I'm sure it's in there plenty if you search around my channel. But when I explain something I try to make certain I know it well, this tends to eliminate filler words.
They're inefficient and have pretty bad emissions. Though inefficiency doesn't seem to be a big deal to many car companies, so I'd blame the latter, which is forced. If you can't meet emissions, you can't sell your car. Hence, the next RX vehicle is supposedly going to be hybrid to compensate.
Damn straight! I've looked at their records in racing and they don't look as dominating as the rumors and comments I've before seen suggest not to mention that there are tons of youtube vids and a major website of guys swapping out rotaries for RB26s, 2JZs, LSx, and other types of engines.
Size yes, or perhaps a lack of efficiency. There are hundreds of piston cylinder engine designs out there; you'd need a dramatic efficiency increase and size decrease to make the manufacturing worth switching over to.
The engines are quite different, and a rotary engine has more power strokes per crank revolution than a 4 stroke engine, thus it produces more power with a smaller volume. Kinda like a two stroke engine.
Hello JP, I'd recommend reading the "Future Plans" section of my FAQs on my website. My website link is in the description (howdoesacarwork). But yes, an ME degree is great for getting into the automotive industry - that doesn't mean it's easy to get in though! Best of luck!
Rotaries are like the engineers wet dream. 3 moving components, amazing power for size and weight. One thing, you're right that apex seals are some of the higher stressed points of the engine, but the synchro gears (the gearing on the rotors and the housing to maintain accurate rotor movement) tend to be the limiting component when it comes to high rpm race engines.
Could you do a video on the "liquid piston" then" (inverted rotary) engine? I can't find a good explanation of the design of the rotor and chamber management of intake, exhaust and cooling air. I have no financial interest in the company.
I agree with the others, not as well explained as your other videos, especially as this is an uncommon engine which requires more details. Output shaft to rotor explanation could be more detailed, like how they are connected, this would make the 3:1 ratio easier to understand. Giving a brief explanation or recap of what a combustion phase is would also be helpful. Lastly, the difficulties of achieving compression ratios could be explored like you usually do with pros and cons in your other video
Hi,I know you did not asked this to me,but its just to help you in the part of having more HP than a V6,it depends on the upgrades,and tuning,and about fuel economy,well rotaries are not so good at those but if you treat them well and maintain them,it will last,and maybe not as economic as a corolla,but you get my point,hope this helps.
they have different emissions, not exactly poor when considering. The problem is that the emissions rules are created to suit more common engines. The new mazda rotary is extremely efficient now though, they fixed the problems with ports in the new RENESIS.
why is the fuel consumption of a rotary engine so much greater than a piston-cylinder one? is it possible to have a diesel rotary engine? btw great video as always! keep up the excellent job! (IF possible u can bring the actual components when u present your stuff. it would make it more real. just a suggestion...) thanks again.
@ichigokillsyou One of the biggest reasons that comes to mind is the fact that rotary engines fire more frequently. In a piston cylinder engine each cylinder fires once (one power stroke) for every 2 revolutions of the crankshaft. So if you're at 4000 rpms each cylinder fires 2000 times per minute. In a rotary engine, each rotor has 3 power strokes per revolution. So if you're at 4000 rpms you have 12000 power strokes per rotor.
you are very right.rotary is a race engine so they need lots of maintenance or regular servicing unlike a piston engine where you can change the oil only once a year to service. a mazda rotary will surly become dis-functional. every 5000km a rotary should have an oil change compared to 10000km or more with a piston thats why they have a bad rep.
yes and no as we are not talking about kenitc energy. in short there is less to go wrong .also gravity plays a part as it has less to fight with than a piston engine , circular vrs up and down. it is more about the shape of the piston/rotor and housing
I had an fc for about half a year. If you are in a budget. Do not even think of getting a rotary. They use way to much fuel for the power you get. Yes they are small engines but uses a lot of fuel. Only reason I got it was because the sound of a rotary is beautiful.
Hi, can I just suggest you make a video about flat top and dome type pistons and what are the pros and cons of the said different types of pistons. thanks. nice vid btw. cheers!
seals are an issue, but also emmissions and efficency are also a big problem, Due to the long combustion area (stroke) and low(er) compression plus higher available RPM means fuel can struggle to burn properly and you can end up with a pocket of unburnt mixture trapped ahead of the flame wave that just goes out of the pipe, they can be very reliable when driven nicely, but if you push the red line no rod knock, no valve ratte to warn you 5k miles ahead of an impending problem, just a bang.
Yea I saw that too and it looks like it would be lacking power as well so yea... its an expectional design and piece of engineering but it needs improvements just like the Flathead Cylinders back in the day when piston engines just came out!
As i understand they tend to leak unburnt fuel and air into the exhaust through the spark-plug holes' break in the seal. I watched this to see if you explain why no one has tried a diesel rotary engine to eliminate this problem. Is there another reason for it's low compression ratios and high emissions?
Question: are both rotors used for combustion or is the second rotor only used as a counterweight. If the second rotor is also used for combustion, does it have a separate chamber?
both are used for combustion. and it has a separate chamber. its like this. front iron or plate, them middle housing with the rotor inside. then a middle iron or plate. then 2nd housing with 2nd rotor in it. then 3rd/end iron or plate. the plate are intake runners that lead into the rotor housings.
So pretty much any engine would need not only higher flowing injectors and colder intakes, but stronger seals as well as stronger internals (pistons, valves, rotors, or whatever when adding forced induction correct?
What they need to do is resign the rotors to spin with faster rpms, have some curves in the rotors in to allow bigger combustion ( I think the space for combustion is TOO SMALL) , use direct injection like you said, and have each rotor housing smaller to aid better thermal and volumetric effeciency as well as aid combustion. If they do that It may help bring rotaries/wankels back, else no point in making rotaries anymore.
Hi, if you have time, please do a video explain the axial rotary engine, I am wondering why it doesn't take off at least like wenkle engine did, because it uses already-proven piston technology. thanks.
There are more than 3 moving objects in a rotary engine, you only mentioned the 2 rotors and crankshaft. There is also a counter weight. And about the gear ratio rotor/crankshaft, I thought the crankshaft had less revolutions...
Would it be the output shaft with the extruding lobes creating the torque? Which simce it acts as a crankshaft that means a supercharger is still possible for rotary engines right?
I wonder if the Sopwith Camel, with its Clerget 140 HP Rotary, had anything to counter the opposite forces? When I flew one, it was like riding a wild horse, it always wanted to get out from my control.
Hey I love the rotary engine but it has not yet been perfected. I have a few tricks that I do on my own engines for cooling but those are secrets from the old carb days. A big key with rotary was high maintenance which nobody takes into consideration. I do understand my previous comment came out of my mouth whilst my head was in my anus but it does hold a valid point. Maybe someone will design a rotary diesel or HHO someday for production not testing purpose only. I know they have ran on both before but for how long and such. Cheers doktor.
You have to step the coolant passages. Very time consuming but helps cooling. I don't know the difference between Mazda and other wankel designs. I've only owned Mazda rotary engines.
It's groves in the coolant passages. Takes machining and hand process to do. It's done to race engines. Along with porting exhaust, intake and all the other expensive upgrades. I own a 1986 turbo diesel vw jetta now. Great fuel economy but older technology limits it's potential efficiency. I'm going to upgrade to the 1.9l tdi and gain major fuel efficiency.
doktorbimmer i dont know. i am considering getting a new miata and tossing a rotary in there. make for great fun. the unfortunate fuel efficiency will be offset by the other car i plan to get as the 'and' car. the elio which is aiming for 84mpg. so for daily driving, or when i just want to pop to the store. use the elio. when i want to take some long roads that twist and turn, the miata. still, together will be a bit pricy to get into. so i will go for the elio first. lol
Great video! Just one question about the spark plugs. You said once they ignite, the rotor swings down and combustion occurs in the bottom right chamber of the drawing. But what keeps combustion from occurring in the smaller chamber in the middle-right as soon as the spark plugs ignite? Or does combustion begin at that point and continue on until the rotor has swung a bit more?
compression ratio does not denote gas milage. the rotary engine does not consume for fuel than a v8 it is however more efficient and is a race engine in fact. although a 13b rotary engine is 1.3 litres because of it efficientness some people class it as a 2.6 litre as sweeped volume
Awesome video, i have a question though. What would be the rpms you see on your dashboard? Would it be the wheels or the big gear or the small gear (small gear is the one that spins 3 times when the big one spins once)
they ARE still in production, they stopped making the rx8, but they havent released the next generation yet. Its scheduled to release between 2016 and 2018
mazda cannot afford to release a 16x engine in a new 7/9. they have made the 16x. but i dont know where they will use it. they are using a single rotor as a range extender in the mazda demio hybrid. but thats a totally different purpose.
They also do not generate a lot of torque (relative to a piston engine). Which isn't a problem for enthusiasts, but is likely annoying for people who just want a commuter car. This may be encompassed in your statement of their efficiency, but they also burn a lot of oil in comparison to piston engines.
lower compression ratio may be a downside but if its supplemented with more rotors, turbos and spinning at over 9000 rpm, then they're the best performance engines in the world!
Is Liquid Piston's rotary x any better? Does it actually solve the problem of classic rotary engine. Could we see it in everyday vehicles? Can you do a video on it please ?
They could be efficient given fuel injection, just as two stroke engines are vastly superior. My opinion on this may sound strange but two stroke engines and rotary engines are still new tech and have yet to be fully exploited. The main reason rotary engines are not very popular is simply cost to produce, lack of popular demand, and the apex seals.
that is part of the problem, I do believe however that we can simplify things, but it would take some time, not too feasible, but possible, just not as convenient as you had stated previously. All in all I guess its not something that people would want to look into.
does it transmit over as "power" or torque? i knew these engines are little beast but with such high rpm i would think it produces more torque rather then power?
Technically a rotarys engine doesn't have a stroke. It has as in name implies it rotates. But in its 1 rotation cycle it still fallows the 4 stroke method of intake, compression, ignition, exhaust.
Im a bit of a newcomer to this and am still a bit confused. First, how does the air become compressed? With the piston one the piston pusher the air until it was compressed, but here i see nothing to compress the air. Also, how does the combustion actually power anything? With the piston one when the explosion happened it pushed the piston down, but here I dont see anything happen after the explosion. I like this series a lot, nice job! If you could answer my questions that would be great!
In the second "stroke" stage. The space to the right (in the diagram) right by the spark plugs is very small; this compresses the fuel/air mixture. There is no space for the the F/A mixture to go from the intake stage, so the same volume of F/A mixture that goes into a small space produces compression. There is no need for a piston because the rotor is directly attached to the crankshaft. When the rotor spins, the crankshaft is spinning with it; they are basically one unit. He basically answered every question in the video.
Im in grade eleven and i want to go into mechanical engineering also. Would this type of engineering be used for designing car engines? I love cars so that would be awsome
watching this in 2021 and holy heck how your production quality and how you explain things have improved. Super cool to see you grow man
I had two thermo courses, which I did not group into the "fluids" category, just simply because they aren't often relating to fluid flow, more intensive on heat transfer and heat cycles. I agree though, thermo was one of my favorites.
I remember another rotary video with an actual rotary. It's come a long way.
Hello, glad you're interested. Unfortunately your questions are a bit too general to give a specific answer to. A wankel could have better/worse fuel economy and/or power than a V6. And yes, it can always output more power. Reduce friction, increase compression, forced induction, etc.
The engine still manages to pull in air, compress it, ignite it, and expel it... the four things it needs to do. Call it whatever you want, it doesn't directly compare with piston cylinders and isn't accurately described by "two strokes."
@danielsong25 That would be a logical statement, yes. For example the energy of moving a valve up and down is lost and must be compensated for in a piston cylinder engine, where as there are not intake/exhaust valves in a Wankel engine.
@doktorbimmer Perhaps you are correct but it is commonly referred to as a rotary engine. I believe even Mazda refers to it as a rotary. So it goes...
WONERFULLY EXPLAINED!!! I was attempting to explain this to my gf but her interest in cars is nill at best. she's slowly gaining more interest and somehow we got on this topic. lets just say the video explained what i've been trying to for the past 2hours. :D
@NicksCorvetteMan I agree completely, I think it's an incredible engine. Unfortunately there's no base, and not enough engineers working to make it efficient. No catastrophic failure; sounds like reason enough to use it in the racing scene.
Interesting question. I would think it may be a bit easier, since there are less parts. But developing the manufacturing process would be the major cost, and if the engine can't deliver, the overhead cost isn't worth it.
@EngineeringExplained I should note that although there are 3 power strokes per rotation of the rotor, there is one power stroke per rotation of the crankshaft. My first comment can be a little misleading in this sense.
your videos keeps me from sleeping, extremely interesting and really fun to know this stuff. Thanks, subscribed!
Ever since I started massing with them with model aircraft, the Wankel Rotary system has been one of my favorites. While it doesn't get good gas mileage in real-world driving situations, and can be atrocious in stop + go driving (ask anyone who owned an RX7) for applications requiring consistent torque through the Otto Cycle (such as in small model aircraft) nothing else can really compete. Single cylinder model engines have a 2 stroke system that's worse on gas, and has to keep more momentum.
@EngineeringExplained 2 stroke engines have greater hp/liter because they fire twice as often as 4 stroke engines. (See Two-Stroke Engine - Explained) for more info on two-strokes. The more power strokes you have per crankshaft revolution, the more power you will produce!
You can actually see a simple form of this engine in operation in Warped Perception's UA-cam channel. He recorded the engine's various phases at 4k which are then shown at slow-mo.
I have to say your explanations are very good.
@NicksCorvetteMan Haha, I originally wrote "Emissions? Weight?" But thought how could something be banned because it's too light. They should be allowed to place weights where they wish, not ban a design with advantages. Kills innovation.
No practice haha, I'm sure it's in there plenty if you search around my channel. But when I explain something I try to make certain I know it well, this tends to eliminate filler words.
You could feasibly attached a supercharger, yes. Though it seems a turbo may be a bit easier of an option.
They're inefficient and have pretty bad emissions. Though inefficiency doesn't seem to be a big deal to many car companies, so I'd blame the latter, which is forced. If you can't meet emissions, you can't sell your car. Hence, the next RX vehicle is supposedly going to be hybrid to compensate.
Glad to hear, thanks!
I have a BSME, you might be interested in reading my FAQ's on my website. The link is in the description (or my channel page on the right column).
Amazing. I always have a hard time explaining the type of engine in my car to people. I'm going to send them HERE from now on, great job.
Damn straight! I've looked at their records in racing and they don't look as dominating as the rumors and comments I've before seen suggest not to mention that there are tons of youtube vids and a major website of guys swapping out rotaries for RB26s, 2JZs, LSx, and other types of engines.
Great to hear you've learned!
Size yes, or perhaps a lack of efficiency. There are hundreds of piston cylinder engine designs out there; you'd need a dramatic efficiency increase and size decrease to make the manufacturing worth switching over to.
thank you sir for making this video,very helpful for people like me who didnt have education in engineering, i just love to see engine works
Yes, but there are also problems with complete combustion occurring, due to the shape of the combustion chamber at ignition.
What information is lacking, that I should make note of in the video description?
There are currently no production rotaries out there, and the Renesis (RX-8?) wasn't a very efficient engine.
The engines are quite different, and a rotary engine has more power strokes per crank revolution than a 4 stroke engine, thus it produces more power with a smaller volume. Kinda like a two stroke engine.
I believe they're slightly connected, but yes it starts in that area and then swings down.
Hello JP, I'd recommend reading the "Future Plans" section of my FAQs on my website. My website link is in the description (howdoesacarwork). But yes, an ME degree is great for getting into the automotive industry - that doesn't mean it's easy to get in though!
Best of luck!
Rotaries are like the engineers wet dream. 3 moving components, amazing power for size and weight. One thing, you're right that apex seals are some of the higher stressed points of the engine, but the synchro gears (the gearing on the rotors and the housing to maintain accurate rotor movement) tend to be the limiting component when it comes to high rpm race engines.
air in, apex seals out. Love the videos, great work on them!
@NicksCorvetteMan Curious as to the reasoning? Emissions?
Take your time though, it's a lot of information to absorb all at once! Let me know if you have any questions.
Does rotary engine use diesel as fuel? If not, why? Due to compression ratio in previous videos
And at last in this video you said the pros of rotary engine over ic engine then why automobile industry using ic engine??
Rotary 4 engines sounds crazy, Search for the Mazda 787B race car and you will understand. Very high reving engines.
Could you do a video on the "liquid piston" then" (inverted rotary) engine? I can't find a good explanation of the design of the rotor and chamber management of intake, exhaust and cooling air. I have no financial interest in the company.
I agree with the others, not as well explained as your other videos, especially as this is an uncommon engine which requires more details. Output shaft to rotor explanation could be more detailed, like how they are connected, this would make the 3:1 ratio easier to understand. Giving a brief explanation or recap of what a combustion phase is would also be helpful. Lastly, the difficulties of achieving compression ratios could be explored like you usually do with pros and cons in your other video
Hi,I know you did not asked this to me,but its just to help you in the part of having more HP than a V6,it depends on the upgrades,and tuning,and about fuel economy,well rotaries are not so good at those but if you treat them well and maintain them,it will last,and maybe not as economic as a corolla,but you get my point,hope this helps.
they have different emissions, not exactly poor when considering. The problem is that the emissions rules are created to suit more common engines. The new mazda rotary is extremely efficient now though, they fixed the problems with ports in the new RENESIS.
It's strange how often I get this question; I'm curious as to why? I'm in my 20's, Mr. Lite.
Probably size, or are you referring to aviation engine?
It is brilliant yes, but where did you get 300% from?
Rotary engine = Illuminati confirmed
NTLP 840 I was scrolling down my cell phone to exactly write what you just wrote lmaoooo
Sometimes, the apex seals are typically a big concern. The engine itself is pretty simple though.
Can you do a comparison video with walken engine VS piston engines???
about pros and cons . Great video btw.
Thanks.
You ought to be a professor as your explanations are great.
What do you not understand, perhaps I can elaborate for you.
why is the fuel consumption of a rotary engine so much greater than a piston-cylinder one? is it possible to have a diesel rotary engine? btw great video as always! keep up the excellent job! (IF possible u can bring the actual components when u present your stuff. it would make it more real. just a suggestion...) thanks again.
Your videos are awesome. I'm going to try and watch as many as I can.
@ichigokillsyou One of the biggest reasons that comes to mind is the fact that rotary engines fire more frequently. In a piston cylinder engine each cylinder fires once (one power stroke) for every 2 revolutions of the crankshaft. So if you're at 4000 rpms each cylinder fires 2000 times per minute. In a rotary engine, each rotor has 3 power strokes per revolution. So if you're at 4000 rpms you have 12000 power strokes per rotor.
Thanks for watching!
Indeed, I should have mentioned, but was just keeping it simple. (Perhaps too simple).
you are very right.rotary is a race engine so they need lots of maintenance or regular servicing unlike a piston engine where you can change the oil only once a year to service. a mazda rotary will surly become dis-functional. every 5000km a rotary should have an oil change compared to 10000km or more with a piston thats why they have a bad rep.
yes and no as we are not talking about kenitc energy. in short there is less to go wrong .also gravity plays a part as it has less to fight with than a piston engine , circular vrs up and down. it is more about the shape of the piston/rotor and housing
Renesis is Mazda's brand name for their rotary engine.
The Takahashi's approve
Yes
I had an fc for about half a year. If you are in a budget. Do not even think of getting a rotary. They use way to much fuel for the power you get. Yes they are small engines but uses a lot of fuel. Only reason I got it was because the sound of a rotary is beautiful.
Oga u dey try❤
Hi, can I just suggest you make a video about flat top and dome type pistons and what are the pros and cons of the said different types of pistons. thanks.
nice vid btw. cheers!
Love your videos. Really great. As a mechanical engineer do you take any courses on aerodynamics?
seals are an issue, but also emmissions and efficency are also a big problem, Due to the long combustion area (stroke) and low(er) compression plus higher available RPM means fuel can struggle to burn properly and you can end up with a pocket of unburnt mixture trapped ahead of the flame wave that just goes out of the pipe, they can be very reliable when driven nicely, but if you push the red line no rod knock, no valve ratte to warn you 5k miles ahead of an impending problem, just a bang.
Yea I saw that too and it looks like it would be lacking power as well so yea... its an expectional design and piece of engineering but it needs improvements just like the Flathead Cylinders back in the day when piston engines just came out!
As i understand they tend to leak unburnt fuel and air into the exhaust through the spark-plug holes' break in the seal. I watched this to see if you explain why no one has tried a diesel rotary engine to eliminate this problem. Is there another reason for it's low compression ratios and high emissions?
Question: are both rotors used for combustion or is the second rotor only used as a counterweight. If the second rotor is also used for combustion, does it have a separate chamber?
both are used for combustion. and it has a separate chamber. its like this. front iron or plate, them middle housing with the rotor inside. then a middle iron or plate. then 2nd housing with 2nd rotor in it. then 3rd/end iron or plate. the plate are intake runners that lead into the rotor housings.
MagicTrianglesMedia Thank you for taking the time to explain. Very much appreciated!
Usually, torque is made at much lower RPMs, so higher revs wouldn't put out more torque (usually). It all depends on the power band really.
So pretty much any engine would need not only higher flowing injectors and colder intakes, but stronger seals as well as stronger internals (pistons, valves, rotors, or whatever when adding forced induction correct?
What they need to do is resign the rotors to spin with faster rpms, have some curves in the rotors in to allow bigger combustion ( I think the space for combustion is TOO SMALL) , use direct injection like you said, and have each rotor housing smaller to aid better thermal and volumetric effeciency as well as aid combustion. If they do that It may help bring rotaries/wankels back, else no point in making rotaries anymore.
Thank you!
Hi, if you have time, please do a video explain the axial rotary engine, I am wondering why it doesn't take off at least like wenkle engine did, because it uses already-proven piston technology. thanks.
There are more than 3 moving objects in a rotary engine, you only mentioned the 2 rotors and crankshaft. There is also a counter weight. And about the gear ratio rotor/crankshaft, I thought the crankshaft had less revolutions...
Would it be the output shaft with the extruding lobes creating the torque? Which simce it acts as a crankshaft that means a supercharger is still possible for rotary engines right?
I wonder if the Sopwith Camel, with its Clerget 140 HP Rotary, had anything to counter the opposite forces? When I flew one, it was like riding a wild horse, it always wanted to get out from my control.
Still the best engine design ever built! (my opinion)
sadly they never reached a great mind to develop them to be more efficient.
Hey I love the rotary engine but it has not yet been perfected. I have a few tricks that I do on my own engines for cooling but those are secrets from the old carb days. A big key with rotary was high maintenance which nobody takes into consideration. I do understand my previous comment came out of my mouth whilst my head was in my anus but it does hold a valid point. Maybe someone will design a rotary diesel or HHO someday for production not testing purpose only. I know they have ran on both before but for how long and such. Cheers doktor.
You have to step the coolant passages. Very time consuming but helps cooling. I don't know the difference between Mazda and other wankel designs. I've only owned Mazda rotary engines.
It's groves in the coolant passages. Takes machining and hand process to do. It's done to race engines. Along with porting exhaust, intake and all the other expensive upgrades. I own a 1986 turbo diesel vw jetta now. Great fuel economy but older technology limits it's potential efficiency. I'm going to upgrade to the 1.9l tdi and gain major fuel efficiency.
doktorbimmer i dont know. i am considering getting a new miata and tossing a rotary in there. make for great fun. the unfortunate fuel efficiency will be offset by the other car i plan to get as the 'and' car. the elio which is aiming for 84mpg. so for daily driving, or when i just want to pop to the store. use the elio. when i want to take some long roads that twist and turn, the miata. still, together will be a bit pricy to get into. so i will go for the elio first. lol
Great video! Just one question about the spark plugs. You said once they ignite, the rotor swings down and combustion occurs in the bottom right chamber of the drawing. But what keeps combustion from occurring in the smaller chamber in the middle-right as soon as the spark plugs ignite? Or does combustion begin at that point and continue on until the rotor has swung a bit more?
compression ratio does not denote gas milage. the rotary engine does not consume for fuel than a v8 it is however more efficient and is a race engine in fact. although a 13b rotary engine is 1.3 litres because of it efficientness some people class it as a 2.6 litre as sweeped volume
For a video you should explain why DSM crank walk. And what crank walk is.
Can you upload explaining strilling engine work?
Awesome video, i have a question though. What would be the rpms you see on your dashboard? Would it be the wheels or the big gear or the small gear (small gear is the one that spins 3 times when the big one spins once)
they ARE still in production, they stopped making the rx8, but they havent released the next generation yet. Its scheduled to release between 2016 and 2018
The RX-8 is not currently sold, thus none in production.
mazda cannot afford to release a 16x engine in a new 7/9. they have made the 16x. but i dont know where they will use it. they are using a single rotor as a range extender in the mazda demio hybrid. but thats a totally different purpose.
They also do not generate a lot of torque (relative to a piston engine). Which isn't a problem for enthusiasts, but is likely annoying for people who just want a commuter car. This may be encompassed in your statement of their efficiency, but they also burn a lot of oil in comparison to piston engines.
lower compression ratio may be a downside but if its supplemented with more rotors, turbos and spinning at over 9000 rpm, then they're the best performance engines in the world!
I super want a rotary generator for emergency stuff. That'd be awesome.
Oooo or a car powered by a rotary engine and a CVT! Simplest drive train EVAR.
Does combustion happen to both rotors (you said both have separate housing) or is the second purely for counterbalance?
true but flatheads really respond well to turbos and supercharger even more so than that of an engine with a valve
Is Liquid Piston's rotary x any better? Does it actually solve the problem of classic rotary engine. Could we see it in everyday vehicles? Can you do a video on it please ?
Hahah I know all too well how that goes! If you actually got her to watch the video, bravo, my gf has only watched one of 80 or so uploaded.
They could be efficient given fuel injection, just as two stroke engines are vastly superior. My opinion on this may sound strange but two stroke engines and rotary engines are still new tech and have yet to be fully exploited. The main reason rotary engines are not very popular is simply cost to produce, lack of popular demand, and the apex seals.
actually it is 1.3 but it has 2 injectors per stroke so it is 2.6 L if we convert it to piston displacement
does this engine has any disadvantages compared to a normal engine in terms of manufacturing? is it harder to make? more expensive?
that is part of the problem, I do believe however that we can simplify things, but it would take some time, not too feasible, but possible, just not as convenient as you had stated previously. All in all I guess its not something that people would want to look into.
These engines use a lot of fuel and are very high revving! The sound of them is insane to!
Can you upload explaining how CRDI Engines work?
Thanks :)
does it transmit over as "power" or torque? i knew these engines are little beast but with such high rpm i would think it produces more torque rather then power?
Technically a rotarys engine doesn't have a stroke. It has as in name implies it rotates. But in its 1 rotation cycle it still fallows the 4 stroke method of intake, compression, ignition, exhaust.
in a 4 rotor is there a firing order? like 1st rotor then 3rd,4th then 2nd for example. or is it just 1,2,3,4 90 degrees apart?
Im a bit of a newcomer to this and am still a bit confused. First, how does the air become compressed? With the piston one the piston pusher the air until it was compressed, but here i see nothing to compress the air. Also, how does the combustion actually power anything? With the piston one when the explosion happened it pushed the piston down, but here I dont see anything happen after the explosion. I like this series a lot, nice job! If you could answer my questions that would be great!
In the second "stroke" stage. The space to the right (in the diagram) right by the spark plugs is very small; this compresses the fuel/air mixture. There is no space for the the F/A mixture to go from the intake stage, so the same volume of F/A mixture that goes into a small space produces compression. There is no need for a piston because the rotor is directly attached to the crankshaft. When the rotor spins, the crankshaft is spinning with it; they are basically one unit. He basically answered every question in the video.
Im in grade eleven and i want to go into mechanical engineering also. Would this type of engineering be used for designing car engines? I love cars so that would be awsome