If you use this as the generator on a hybrid car, always running it in its optimal power band, you have a huge improvement over the small piston engines used today in cars like the Prius. Knock hundreds of pounds out of the gross weight, and free up a lot of internal space in the car.

This motor appears to be a perfect replacement for current motorcycle engines ! The size and weight makes it perfect for motorcycle design !

I have seen this before. Hasn't really seemed to have gone anywhere, but I loved the concept.

Anything that can keep the ICE motor alive. I really do not want to switch to EV. I want my engine sound and my manual gearbox.

Yes. I absolutely love the idea of this design, being the revival of rotary engines! With Rob Dahm bringing the hype, in his 4 rotor? Imagine if he were to pioneer the first upscaled version? Oh dude, I hope. I really wish!

Loving the innovation and am interested in seeing further iterations!

I’m always a fan of new and viable ICE designs. I’m such a believer of Liquid Piston that I just invested into the company. Let’s see those contracts come in!

Their next technology demonstrator should be at least a dual-rotor 500hp engine that runs on diesel fuel. This would put it in the class of semi-tractor/trailer over the road transportation. It would also be able to show usable fuel mileage numbers.

I would love to see this engine come to market, but I am very afraid it won’t.

Funny, it does look more like a 2-stroke engine, with the ports in the "piston" instead of the cylinder... I didn't quite get the idea about how the seals work, or are made to last...maybe they just burn oil, or use the fuel as a hydrodynamic seal...I dunno..

This one looks to be better than the Wenkel because the seals don't pass over the gaps for the spark plugs. If the RPM in a Wenkel engine gets high enough the spark plug recession can allow burning fuel from a previous cycle to pass into the next cycle early and cause backfiring. (As seen in one of Rob Dahm's recent videos) In addition, this engine block won't be unevenly heated like a Wenkel is. (Though this one's rotor will be unevenly heated, whereas the Wenkel rotor is evenly heated.)

This engine needs marketing!

I love rotarys and have been following the liquid rotary engine since it's development. When they designed this motor they looked at all engines, their benefits, and flaws, and literally addressed all of them. This has huge potential, and I will be super excited to see the future of this engine

Thanks again very useful information Salute to you .

It's taken them a while to have an actual demo. I remember when it was just in the modeling stage. If the seal lubrication system actually works well this one may actually find some success.

two things in this video that make you (me) think: 1. " emission laws " 2. " lubricated seals in the combustion chamber "

Any new technology is always worth looking at.

LP is selling evaluation units right now for around $30K to OEM investigating product development. The model they're selling develops three horsepower and weighs four pounds.

4:37 Ya , highly about time This can be an outboard motor or an aircraft motor even as a diesel . Using the blade to vent and retrieve fuel is genius that the designers of the Wankel didn't get ..!

I don't know if it's a long term proposition, but it sounds MAGICAL

With its exceptional power/weight and power to frontal area ratio, this engine would also be ideal for aircraft. Picture a King Air with only 1/3 of the weight of its current horizontal-opposed piston engines, and nacelles that can be far more streamlined.

I want to see a longevity test.

You had me at "any fuel".☺

I love this engine and the innovative design but keep in mind we already have mass produced 65cc 2T engines that put out over 15 hp.

It is still a metal on metal contact engine. The reason rotary engines failed was because unlike a traditional piston engine that only makes contact with the walls of the combustion chamber with a spring loaded thin metal ring, rotary engines didnt just use a bigger metal surface to make contact with the chamber walls but its entire working required it to do it constantly, at very high speed and with force scraping sideways so no part of the chamber remained untouched. That means once it has reached the end of its durability, no mechanic can rebuild it correctly due the odd shape of the inner chamber (piston chambers are cylindrical and boring equipment are made for cylindrical cavities). When working with metals simple shapes can be recreated with much higher precision and lower cost then odd shapes like oblong or triangle which need a far more specialized and expensive metal cutting tool. I'd say the engine was designed to be discarded after use with the intent of preventing engine builders from fixing it. It is an all too common ploy used by chinese manufacturers to increase their sales volume by sacrificing customer confidence and product durability.

Great video, I just read about this engine on morning brew. Looks they planning on using it as a generator for ev's and also for drones.

With three combustion cycles per revolution, what would be the fuel efficiency? Additionally, if it's humming along at 15,000 RPM within its maximum power band to produce 5HP, what would be the equivalent fuel consumption per HP against a standard 5HP ICE?

Going back in your list I found this. But you have covered it a few times since this one. I do hope it works out, it does sound great. The apex seals and the seals towards the housing are the close tolerances to meet I guess.

Whenever I see this guys adds for the engine I always have a great laugh

Although I would like to see how well it fares in more common and practical applications, as well as some more of it's numbers; this engine seems more ideal than I thought possible. I would love to develop it in the future.

I feel like I have been hearing about this engine for a decade and have not seen a product yet.

Those seals will ensure that this design will never replace conventional engines

Because it does 3 combustion cycles per revolution, it sounds like a 20B rotary! And that's pretty awesome cause I think the 20B is the best sounding production Wankel rotary engine!

Also another benefit of this design I think is that it will heat up the entire engine equality, instead of only having only one side where the combustion happen.

A constant problem with all rotary engines is that they burn a lot of oil. This would too.

I agree 👍 they need to stack 3 or 4 of them and have automatic oiling systems.

Oh, SUPER quiet. Haha, jk. The fact that they eliminated the apex seals is huge in itself. I'll be interested to see how the intake and exhaust seals hold up. As far as I know, they've never been incorporated into the rotating assembly.

And the big question is how efficient is it..

It has the same flaw as a Wankle engine, it needs super precision CNC machined rotor and housing a traditional piston achieves the precision by drilling, much much faste/ easier/cheaper and reliable.

I love the design of this engine, I've known about it for years. But I feel like you presented it in a way that was very, very optimistic, since it's not in production yet, or you make it sound like some of its properties are unique, when they're not. Here's your list: 1. Scalable -- My friends works at a power plant that has an on-demand generator: it's an inline 8 cylinder engines with pistons the size of a man. Reciprocating engines are scalable, too. 2. Quiet. I think the footage at the end of that go kart says it's not quiet, I wouldn't expect it to be quiet. 3. "No Vibrations" -- Their design seems to be more balanced than a reciprocating engine, but c'mon Also, most ICEs can be adapted to multiple fuels. Different grades of gasoline, propane, natural gas, or hydrogren for instance for engines with spark plugs, diesel, biodiesel, etc on the other side. I would love to think this engine can run both high-compression fuels like diesel, and low compression fuels like gas, without chanyges. I just don't see that as possible. Again, I fucking love this engine!! The first time I heard of a Wankle 20+ years ago, I dove deep and it tickled my brain. Then, years ago when I heard someone inverted the Wankle's geometry, I pooped my pants. I want this to work. I want to play with them. But that's gonna come from honesty. Being excited is great, but this video came off like it's perfect. I still subscribed though, hope to see you grow.

It's an interesting evolution of the rotary principle.

Awesome! 👍🏻👍🏻👍🏻

that little wedge in the middle of each side will wear out quickly

I think that the seals being fixed to the engine case instead of the piston will make a ton of difference as they don’t move and can be fitted with oiling nozzles of needed

Interesting and informative 🇯🇲

I like the idea. I would like to see data on lubrication and cooling it though - seems like that much power in that small a package would generate a lot of heat.

Interesting little Engine, maybe this was what Felix should have made. If it can be enlarged and developed in this EV age, I’d be interested in it’s power to economy figures, it could allow a Grom sized bike with the power of my GSX1100 …. That would be a real fun Sleeper …

Only problem I can think of is the centripetal force from the extreme RPMs might cause the material to destroy itself but maybe not, would be interesting to find out

This motor is rad. 😎 I like it alot.

The biggest problem I see is the same as all rotary style engines have. Blowby coming from the flat sides. You can either lube the crap outta the sides and burn oil or settle for short lived engines. You could run oil in the fuel but then you'd still be burning oil. I think it would take some kind of advancement in micro particle anti friction oil additives to allow the high enough tolerances for the motor to be reliable.

It goes BRRRRR !

That was pretty damn good

Yes i agree with the sentiments, bring it on so there will be some alternative to EVs, i love the living breathing combustion engines so anything to keep them available is very very good news

The end clip with the go-kart sounds like it's turning up 7K RPM and moving around 5 mph.

I'm interested in seeing a hybrid version of this with the usage of regenerative braking in cars. For motorcycles using a dual rotary concept (power to each wheel) like this would redesign motorcycles. Riding a shiftless motorcycle isn't preferable.

They've got military contracts now

It took a long time for something like the CV transmission to be adopted for mass production, but I hope this engine gets adopted much faster.

This seems like it could easily displace the entire small-motor market sector, gas scooters, dirt bikes, atvs, snowmobiles, jetskis, lawn mowers, chainsaws, leaf blowers, snow blowers, backup generators, outboard motors, really anything using a two-stroke or a 1-2 piston 4-stroke hoyle be able to benefit. We might even see more use of electric transmission drive trains in small motor applications. I'd love to see one of these powering an electric drive train on a stretch ruckus.

Should be a winner

Liquid Piston Engine has much potential. IMHO

Exhaust gas temperatures in efficient high output engines reach in excess of 900 degrees centigrade and pistons are normally cooled by large and close contact with cylinder wall and oil spray under piston is often used. The rotor here with exhaust channel seem difficult to cool well. High temperatures may give sealing problems and material problems on all sides of the rotor probably. Running correct fuel/air mixture for correct catalytic converter function gives high exhaust temperatures.

Glömde att fråga om, hur fungerar kylningen av motorn i fråga? Hur mycket låter den vid gång? Behövs yttre ljuddämpare och kylning, som sagt?

Very cool. Tune in next week when Chris VS Cars MAKES one!!!

Thank you Chris, I have been around engines most of my life. This engine that you are showing, has a lot going for it. 1, less moving parts. 2, less waste of energy due to being a rotatory type. 3, If it was multiplied up to six rotors, it would fit in between the chasse of any commercial truck! What's not like? Have a nice day.

It's been demonstrated on a drone and the military is Very interested in it.

I was today's year old when I learn of this engine type existence, I'm ashamed of myself. What a genius design!

What if I release plans to build this engine under a creative commons license? I think I might get in trouble with patents, it would be interesting. Require a fairly snazzy bit of casting

I really like this over the traditional wankel rotary motor. I would love to see it and specs.

Still have to give props to Rotary Engine,

Been seeing this thing for years now, but until i see it for sale

liquid piston? this is a different take on the rotary. why no compression strips? that tells me this would have to be extremely fine tolerance's when using petroleum's due to emission's, that is why the rotary engines had them.

Looks like the reverse of the Wankle. The Wankle has a triangular rotor and a figure 8 chamber. This has a triangular chamber and figure 8 rotor. What I want to know is the durability. How does it stand up to aircraft overhaul requirements, s piston and vs turbine

I have thousands of hours running single piston, 2 stroke chainsaws. My favorite saw and daily work horse is over 20 years old. I have resisted computer controlled carbs in favor of mechanical simplicity. I even pass up the more powerful fuel injected saw that is available. But if this type of engine can compete with my beloved 440 in power to weight? This engine looks like it wants to deliver torque. In my applications, that could be huge. While also not needing 2 stroke oil. Another huge plus in my own opinion. I will miss the backfires that my aftermarket exhaust creates. But lower vibration is super attractive.

I came up with this exact same idea independently when I tried to solve the problem of apex seals. this is just a first pass at combustion sequence optimization. the apex seal problem has only been _mitigated_ with this design.

Ideal hybrid power unit / generator

Let's hope it takes off

I still want to know why the ‘apex seals’ aren’t serviceable from the outside of the rotor case. Could you not pull a service cover, remove, and replace?

I like it and think they should get a Mazda and swap in their engine and see what happens.

It is always the seals that fail, side seals and the combustion seals. Needs loving car to progress in development.😊

I’m following engine tech because I’m into light sports aircraft

Please Mazda, bring back the RX line with a scaled up version of this engine!

The oval design of the rotational piston is cool, but again only time will tell how long the seals will last.

I think they will have issues with wear and rebuilding the Rotor housings they are very complicated..if worn they would most likely be tossed out,and replaced with new as well, if any carbon is collected inside the engine it will most likely damage the rotor itself as the apex seals are now in the Housing..

Has a great sound, somewhere between a triple and an inline six.

This seems like the best choice for a Paraglider engine or a similar ultralight ... but I'd say it probably should be 3D printed. Forget about developing manufacturing methods for the engine, just 3D print it.

Side ports in the rotor remind me of the Mazda renesis

Nifty !

Perfect it and make a 300 hp jet ski that weighs < 500lb.

I could do with this engine for my bicycle, save my arthritic knees. And have it run on camping gas.

Wankel engines have several flaws that are almost impossible to overcome. The seals are scraping the chamber walls requiring oil to be injected into the engine. The seals wear out requiring an engine tear down. They don't get good fuel economy. The combustion occurs in only one chamber causing a hot spot which makes even cooling difficult. This engine seems to overcome those flaws. I can hardy wait to see how they hold up in the real world.

50cc 2 stroke engines are producing up 38hp 2 rotor 13B drag race engines running single turbo on methanol are reliably producing 1400hp This design produces no more work at the crankshaft than a Wankel. Hardly anyone realises it's side seal that are responsible for lost compression in rotary engines. This engine will be no different. Apex seals will face the exact issues they do in a in the Wankel.

Have you ever done a video on cyclones External Combustion Engine? would like to a video on that and your take on it.

I love this idea. Been trying to spread it around as much as I can, especially to folks like Rob Dahm.

Technical chart : i hope 15,000 rpm (250 Hertz) which is (1/250)=(4/1,000)=4 msec, but the FLAME (Propagation) TIME needed is much more than that (15-20 msec). Obviously the Power stroke will deficit of thermal extraction, they (triple lobes) will not ever reach full expansion before being dumped-out to (premature) exhaust; (1) you can argue that 15,000 rpm is just MAXIMUM speed, the Operational ones is much much lower than that, the optimum speed usually 60% (of less) of Max one.. (2) you may CHOOSE very high OCTANE no. of (gasoline) fuel, to make fast burner. Then you could get a more efficient version of this compact engine..good luck!

Would make a ideal small light aircraft engine

To my reckoning it won't need a gearbox thus saves yet more weigh Making it extremely stronger with platinum coated internal surfaces to stop rust or erotion.its not as expensive as the razor blades have a spluttering method to coat the blades. Results should be a fantastic throttle that just keeps reviving faster and faster. In theory anyway.

This might find a good home inside small aircraft like a Piper Cub or a Cessna 172. Or perhaps being used in motorcycles. In both applications you have the efficiency of a diesel engine without the excess weight.

Great !

so good

Very impressive hope it goes into full production and available to the public 😀👍🍻