Wankel Modification

[YeTenuousUmbrae]

that's some elaborate cooling fins you have. extra weight/size would be too much.

btw, what is the fuel? air? :S

[TheNoisePolluter]

Thumbnail looks like a triangular eye ball.

[utubehayter]

What is the modification?

[tpvalley]

is the ratio of rotor speed to crank speed constant for all wankels or does it vary?

[coolfool182]

Did you do the graphics for this video? If so nice job, neat video. I love these rotos.

[duicyduce]

so you got rid of 50% of the fins......congrats, you accomplished nothing but a lack of heat exchange

[TheNoisePolluter]

How many people thought the thumbnail looked like an eyeball with eyelids?

[davespencer001]

Please note that there on NO air compressed in this engine. Only the expansion of compressed air. The exhaust and intake ports have been modified to allow for two expansion ports to increase the efficiency of the expanding air. The exhaust is located in the typical rankle compression chamber where the fuel, air mixture is compressed. Placing the exhaust in this location almost completely removes losses due to compression. If you look at my other videos you will hear the engine so of course we d

[jcbiddulph]

why do you wase energy by compressing the air?

[davespencer001]

Just to be clear, the design is to be air powered, not air cooled. Check my other videos to see the actual engine running off of scuba tanks regulated to 130 psi.

Hope this helps to clear up some of the confusion in the comments. Also, the engine is a modified sachs rotary from a snowmobile.

[HashECM]

@davespencer001

If it is powered by compressed air, why so much cooling?

3/4 of the tools in my shop are pneumatic - and the longer I run them, the cooler they get.

It is a function of a compressed gas to absorb energy when expanding.

Also, what is with the "spark" in the animation?

Additionally, the wankel design is horribly inefficent for expansion engines. There are 2 stage recip engines (French design) being used by Tata motors in India that are literally 1000% more efficient for this.

[BikerBry]

@HashECM guess you don't quite understand how compressed air works. The heat energy inside the compressed air in multiplied as it's compressed. That's what fires a diesel engine. The air in your air tools is on the other side and expanding, so it refrigerates a bit. Heats as it's compressed, cools as it expands.

[Nismoke]

how are you going to reduce friction between the balllast weight and the rotor inside teeth?

[kobukankingkona]

i think its been modded for air cooling?

[spikerbrad23]

is this supposed to be air cooled?

[djskyline701]

i think u mean cooled by air

[darkrx777]

It looks like an air conditioner lol i still dont see how it works

[iroc464]

you can make air explode?......

[ZoranM001]

Како се хлади?

[maynardr6]

Aren't the tanks they're using rupture resistant? Seems like I read something about the tank being made of individual cells. Whatever it is, I think it negates the whole "blow up the country" theory.

[justnotcricket]

ive always thought you could power an entire sterling engine just off the heat a wankel produces. anyone know if this has been tried?

[white944s]

mazda now makes their wankel engines with axial intake and exhaust ports. This animation shows radial intake and exhaust ports. The new renesis rotary rx8 uses that style of engine. I had a rx7 once. The exhaust system on that car would get up to something like 1800 degrees. I don't think air cooling would suffice, otherwise mazda would have done it. Cars a lighter when you don't have to carry all that water around. Great animation

[LarryLane07]

It's air cooled-it doesn't RUN on air

[allenohsa]

porsches thru the 1996 model year were aircooled, iirc.

[brenthoser99]

hey that is pretty neat that a major car engine "could" run on air cooling, the last thing I personally have herd to do that was old Volkswagen engines they use for dune buggies.

[killaofdoomsday]

hehehe these engines are coll except the bearings dont last long on the crank

[EpiXl33t]

i think he means compressed air

[getoffmyinternet]

"Run on air?" Wow.

This is an air cooled rotary. The only modification is that i goes back together into a different shape as it came apart for whatever reason.

[jumpmaster98]

i hope we won't have to start BUYING AIR for our cars! lol

[driftability]

Well that explains alot.

[pentica]

can it be converted to run hydrogen combustion?

if that can be done then we would not have to worry about the drain on the worlds oil stores nearly as much, its a step in the right direction but we aren't nearly to the point where we the worlds people can actively maintain our needs on this planet

[klauskarlkraus]

mazda is running an rx-8 hydrogen car since 1998 i think

[pentica]

sweet!!

[TerribleOne718]

yes you are absolutely right, its the rich money hungry bastards that own the oil company's that will not allow that to happen, do they think they can take their money to the grave? wtf!!!!!!!!!!

[biohazardzlw]

The rx-8 wasnt put into production until 2003, though mazda has made, I think, 5 rotary vehicles that can run on hydrogen so far.

[klauskarlkraus]

yeah i just realized the rx-8 isn´t that old. i just meant the wankel engines

[musclekid13]

@klauskarlkraus RX8 wasn't out in 98

[klauskarlkraus]

@musclekid13 yeah i know i meant hydrogen wankels i don´t know why i wrote rx-8 maybe it was late

[musclekid13]

@klauskarlkraus Never heard of the Hydrogen wankel? did it have more power or better gas mileage?

[musclekid13]

@klauskarlkraus Never heard of the Hydrogen wankel? did it have more power or better gas mileage?

[klauskarlkraus]

@musclekid13 the new rx-8 hydrogen cars (there are mazda 5 as well or premacy as they are called in japan) can get about 100 kilometers with a 105 liter hydrogen tank. the hydrogen is stored at 350 bar pressure. bad thing is the power decreases about 60 kW which is about 80 horsepower. the rx-8 and mazda 5 hydrogen cars have been tested in a big on road test in norway.

[djahriman]

@musclekid13 Both, actually.

[Torvikholm]

@klauskarlkraus The RX-8 was lauched in 2003. The first Hydrogen RX-8 was deliverd in 2006.

[klauskarlkraus]

@Torvikholm yes i mentioned in a comment before that mixed some things up. should´t happend as i am working for mazda but it happend

[klauskarlkraus]

@klauskarlkraus but mazda is using hydrogen wankel engines since 1998 not in an rx8 but wankel engine

[KLONIME1001]

@klauskarlkraus hydroge n waht are u retarde its gas... all torarys are gas... dumb ass

[windfrenzy16]

@KLONIME1001 This response is as retarded as your writing. Google it and see for yourself.

[FiSi3l]

@klauskarlkraus We know :D

[biohazardzlw]

Mazda has developed a wankel rotary that can run on either hydrogen or gasoline. Look up the RX-8 RE and Premacy RE.

[futuristictech]

hydogen works at 1500 psi. aprox. You don't see this as a problem but the ammount of hydrogen that the vehicle carry can blow a whole city block!. Now... put this vehicle in a car accident and the other vehicle is a school bus. How many people this kind of fuel can kill in just one accident? think about it and make some search about the subject. and you will figure like me that the hydrogen vehicle is the biggest mistake that the car industry has made in history.

[whatUsaybob]

And? That would be an easy fix, make the tank thick and small.

Hydrogen is the most abundant element in the universe, and as you said has more power then gasoline. Needs less fuel to produce the same power and will cost close to nothing (unless they charge more then gas then I will need to kill someone). If it burns it's not safe, but really what is? Electric cars need lypo cells that burn and explode, gasoline and hydrogen burn, deisel is kinda inbetween those.

Cars in general are not safe.

[AV3NG3R00]

@whatUsaybob

Hydrogen may be the most abundant element in the universe, but there's one tiny little problem. All the hydrogen on earth is bonded (very strongly) with oxygen to form H2O. The energy needed to split an H2O molecule is massive, and it certainly outweighs the energy you can get from rebonding the atoms through combustion (conservation of energy). The reason we use fossil fuels is because they already contain a lot of chemical energy (converted from sunlight).

[whatUsaybob]

@AV3NG3R00 Yeah, that is the biggest problem. It will be a while for it to be an everyday thing, but I can see it happening in 15-20 years, lol......

However, this would be the best thing for cars until we find a way to make a battery that can hold a charge big enough for cars to drive more then 40 miles.

[starsquid]

It's not as convenient as fossil fuels, but then fossil fuels are non-renewable and will eventually run out, & become (economically) more expensive than the process of water hydrolysis.

The most efficient way of using hydrogen is via fuel cells, so combustion motors are ultimately a dead end technology.

[AV3NG3R00]

@starsquid

Ummm, but where does the energy come from??

You can't just drive a car using a fuel cell, you still need to collect the energy somehow...

What I quite like is the idea of using sugar cane to produce ethanol. The processing of the sugar cane is quite simple and inexpensive, and the performance output is comparable to that of normal fuel...

[starsquid]

@AV3NG3R00 As I said in my original comment: hydrogen, that's the energy source to run the fuel cell.

The hydrogen can be obtained from the catalyzed hydrolysis of water, via any method convenient since fuel cells are so radically more efficient than internal combustion. However, if you're smart, solar cells would provide the energy.

Modern electric motor, modern fuel cell plus solar energy to generate hydrogen, is currently the most efficient system of energy transport and use.

[AV3NG3R00]

@starsquid

Ummm okay, but in your original comment you didn't mention that you'd source the energy from solar cells. I agree with everythg else you've said, but solar cells are horribly inefficient and expensive. I guess there are other methods they use to harness solar energy, but solar cells is certainly not the best of them.

[starsquid]

@AV3NG3R00 Fine then get your hydrogen another way. The fact is that fuel cells plus a modern electric motor are far more efficient than any internal combustion engine could ever be.

You're nitpicking because you've decided you're right, and everyone else is wrong. Which is fine because I can't be bothered.

[JTD19881369]

@futuristictech Dude... The Hindenburg was filled with hydrogen and nothing bad ever came out of that now did it!? lol im partly kidding.. but it was filled to the gills to get its boyant force.. and it didnt destroy everything in sight when it caught flame.. it burnt.. not a violent explosion. I seriously think you have burning Hydrogen and the Hydrogen bomb horribly confused..

[futuristictech]

@JTD19881369 lol No. No dude... is not that. You are right about the confusion about Hidrogen bomb and no presure hidrogen. THE EXPERIMENT;Get a fire proof full body vest and get a hidrogen tank fully charge and with a friend to trow the tank from the top of a 6 story building and you will be standing 8 feet away from the impact zone and if you survive write me back to see the results. Got it? (i am kidding, don't do it) is the risk what get my doubt.

[AV3NG3R00]

@futuristictech

Okay futuristictech, lets do a thought simulation of this test.

1. Hydrogen tank is thrown

2. Hydrogen tank impacts

3a. Lands on nozzle end: Cap flies off, hydrogen sprays out, and nothing happens.

3b. Lands on nozzle end: Cap flies off, hydrogen sprays out, catches fire, and creates a small flamethrower effect. NO EXPLOSION.

3c. Lands on butt end: Nothing happens.

Hollywood is very good at making such a scene so much more dramatic...

[cheapracer]

Whats been modified? All I can see is a standard port rotary - for air you would duplicat the inlet and exhaust ports opposite each other as pressure in and pressure relief ports and you wouldn't need any of the fins for cooling either.

[proudbugowner]

@cheapracer Aircooled he means, not air pump... If it was an air pump case, would you see any spark in the animation??

[BJWTF]

i guess thats would be good on small plane and stuff with air cooling instead of water cooling

[COCOLOCO123456789]

WTF just 1 rotor on it???

[lotusiotus]

??????