Worlds Smallest Rotary Engine (30,000 RPM) 

it sounds like a more badass version of a Formula1 engine

This is great. Any chance for an Rc car to use this?

@@CMDRunematti bit far there mate. the classic V10 sounds way better and V12 even louder but V10 still better

@@abliviustrey do i look like an F1 expert? XD nah, I'm a pleb who liked F1 10 years ago and this reminded me of them. Obviously can't sound the exact same, it's different tech but still sounds nice

@@CMDRunematti ye nw lol. just thought I'd say that cause its definitely not more badass than F1 engines

Really is once you think about it. Like, a horse's average walking over a day, this tiny thing is almost as much.

@@raikkappa23 The only thing that beat it is an electric motor but the weight of batteries seriously add up and don’t last that long. I had an electric RC car that could do 100mph but only lasted like 20 minutes.

@@raikkappa23 Horses actually have about 15 horsepower though

maybe for drones and minicopters

It'll be good to use them on a drone

An actual horse has 14hp😂

horsepower doesnt have anything to do wit horses mannn

@@omarrivera5013 He didn’t mean the animal he meant it has .7 hursepurrs it’s impressive they almost got it to 1 😂

​@Omar Rivera that's only a peak value. the average output of a horse is about 1 hp.

Yeah thats amazin

Highly agreed.

And it should be a Mazda

toyan makes decent small scale engines.

They have. The small ones are as trash as the fullsize wankels. Os engines made them for planes and countless of them made it into cars. Much like the full size counterpart seals burnt up quickly and compression crapped out. They also have no torque and are turds.

I would love a 787B RC with a real rotary engine in it!!

yess

Rob Dahm

Angry beehive engine

They already make a 2 rotor version of this so that would only mean 2 engines needed

If only it was that simple. You can easily stack the housings and "irons", but the shaft will be almost impossible to make without some serious equippment and knowledge. When you go beyond two rotors the shaft needs to be made in several parts that go together during assembly. You would also need some sort og bearing support in the middle for the shaft. JohnnyQ90 managed to make a 2 rotor shaft himself after several tries and he has years and years of experience with machining small parts. A 3 or 4 rotor shaft would probably be 5 times for dufficult than the 2 rotor shaft he made.

yeah

Lol

And he'll have it running in only 10-15 years!

@@bennyb.1742 I have nothing but respect for Dahm. His passion towards rotaries/RX-7 runs so obviously deep and he's utilized RU-vid perfectly to fund it. And he isn't afraid to show the mistakes he makes along the way when building his dream car and learning new things.

@@onutaoyusao But it's still a good joke.

I'm getting more anxiety about the wobbly ass flywheel..

@@carwashadamcooper1538 Why, you're just watching a video, it can't come through the screen and hurt you. :-/ :-)

@@MrJdseniorbro it can hurt the person who makes these videos

i've seen the 787B doing laps in Japan :) - its l o u d

No need to imagine, because ABSOLUTE everyone has heard it the first time, *_AND IT WAS SUPER LOUD!_*

That's ignorant

You're right, @@sonacphotos

@@sonacphotos You could say that about a lot of subpar designs

@@sonacphotos Has to be designed and built correctly first.

@@jmuench420 One you MUST redline them every drive, basically being gentle with a rotary is like severe abuse for piston engine. The problem is you have idiots thinking its a "cute car" and then not making it scream like a warzone going down the street and wonder why it was totaled in under 20k miles when the guy burning tires on the track has 0 maintenance other than basic stuff and getting 100+k miles out of his (which is incredible compared to piston engines being raced). Its just like a jet engine, you need to treat them completely different. You can still destroy piston engine just as easy, like this guy didn't use water in it for several minutes at full throttle, just try that in your car (but actually don't). You can also destroy 4 strokes very easy too going too high rpm bending valves (unless its flat head, which is why I love old flathead engines because you can bypass governor and other than warping the cylinders from over-heating they don't really seem to mind)

I sense the building of a bitchin go kart in someone's future.

@@jg8263 everybodys like wow thats amazing... and then the engine failure hits and then they be like told u so u stoopid for building something like that

@@tarekl.3725 As long as it has like constant maintenance, it should be fine, but it's still kinda dumb

@@jg8263 lmao the bees comment had me on the floor! 🤣🤣🤣🤣 would be awesome indeed.

That sounds awesome

Blow by like a mo-fo

@@WarpedPerception are you going to put turbo chargers tho?

Most rotaries don't make good cold compression, the internal operating temps are high especially around the exhaust ports so they have to design them so that the clearances are right at operating temp. Piston engines get around this with ring gap, Mazda uses spring loaded corner seals to give the apex seals space to expand. Also like you said, no side seals but it might just not be feasible to make side seals for something this small. Even in a 13b the side seals are thin and fragile, they would probably look like strands of hair for this thing lol. Looks like there's thin metal plates that go between the rotor and 'irons' that may be an attempt to create some sort of consumable side seal that covers the entire side of the rotor face instead of being recessed into the rotor itself. Probably good enough for something like this, seemed like it was ripping pretty good once it got warmed up. Probably didn't help that he disassembled it, dropped some pieces, then put it back together in a dirty environment. Even a tiny bit of grit would clear itself out but put scratches in all the sealing surfaces on its way through...

@@Joebobinator your dead on about everything except the disassembly, see what I didn't show was I tried 30 times to start this engine, it wouldn't start had absolutely no compression, then I proceeded to disassemble the engine and I found a completely seized Apex seal. None of the parts were dropped. But yeah I'm going to upload that as a separate video on my other channel and share it here.

In this micro application I wonder if a one piece circular side seal could work to help mitigate the blow by and add compression, similar in position to the oil seals on a 13b. It could sit just inside the bottom edge of the apex seal slot. Trevor, Mazda used 2 and 3 piece apex seals in the majority of their production engines which allowed the seal to cope with thermal expansion and self clearanced between the irons/side plates. The corner seals where there because the side and apex seal had too much dissimilar movement and allowed tighter clearance. The important tolerances on 2 and 3 piece seal engines arethe apex slot to apex seal, the side seal to corner seal, and the corner seal to corner seal slot. I used to build 13bs and some what reliably made around 450rwhp with them on pump gas. Now with a 1 piece seal like was used in 12A and ceramics in racing applications you had to clearance the apex seal to the rotor housing width. But 2a d 3 piece seals self clearanced.

Yes

All pressure engines are basically either pumps or fans. This is a pump.

*fuel pump

Whatever you want

@@weareallbeingwatched4602 And a fan is a type of fluid pump.

Oh man it took me like 45 minutes...😬

Just from what he showed he barely put this thing back together. Exhaust falling off isn't a lolol rotaries suck, that's you not bolting shit on. Dropping parts in a filthy environment, flywheel not centered and wobbling all over, no engine load so it's spinning to double the RPM it's rated for... Looks like a cool engine but man this dude is handling it poorly

This. Dude is ignorant af, he just makes clout chasing vids with shit he doesn’t know muck really.

Me too

I was thinking the same thing

Ya I was like well maybe the crank is bent?

That's just the sliding flywheel buffer pin it's a new feature

I couldnt take my eyes off it either. Haha. Great video though 👍

That was the park lock

Insane what they get out of 1.3L for a 2 rotors and 2.6 litres for a 4 rotor tho… which is impressive af.

there was a diesel one made by Rolls Royce with two rotors two stages (bigger and smaller) where bigger rotor was a supercharger to a small rotor to rise compression and allow diesel to ignite.

@@H3110NU technically if you take the total displacement of all three sides of the rotors the 13b is actually 3.9l of displacement. They only advertised it as a 1.3l because A. People didnt understand them so they can get away with only using the displacement of one side of the rotor, and B. They got into a different emissions regulation and racing classes for small 1.3l vs a big 3.9l.

@@leojensen9270 that's basically saying 2 strokes have double the displacement of a 4 stroke

@@maseywat No, what he's saying is a Wankel rotary has triple the effective displacement of a reciprocating piston engine.

They do have a 2 rotor model.

I want to see a ten rotor

@@livingintheLight. I would love to see a V12

@@ItsMorbinTime03 well rotaries are technically in line, so it would be an I12 rotary.

@@EAGLINWRXI mean two I6's joined together in a V shape

It would be really nice to see car with this engine.

Yup, I've seen them upwards of 550 for the 13B, normally aspirated. With boost, if you can hold them together, you could do quite a bit more. I heard a friend that drag raced them, in an RX3, no less, that the limiting factor with compression was that at some point, the through bolts start stretching. He was running ungodly boost, about 20-25:1 IIRC, and that puppy was fast. He raced 1/8s not 1000s, or 1/4s, which was probably smart, considering the trap speed differences. I forget what he was running, but I want to say low to mid sixes, long time ago, though.

@Don't Read My Profile Photo please go away

@Don't Read My Profile Photo this "hurr hurr dONt rEaD mY nAmE" thing is getting oversaturated and old

@@thesciencesphere4273 100% agree

Looks like a display engine to me, just like the mini v8... It's not intended to run a model. It'll "run", but I wouldn't actually run it... Just put it on a shelf or a desk.

@@volvo09 plenty of people have put these toyan engines in models and run them. At the same time keep in mind he took it apart and dropped the seals. Apex seals and springs are sensitive as it. That did no favors.

@@brandonbrown3600 really? They do not look very durable. I'll have to search some videos. Interesting.

Toyan Engines are very reliable if you know how to tune a carb. I have a few Rc rock crawlers with them and also a 1/8 scale monster truck with a 4 cylinder Toyan engine they all run flawless. .

@@volvo09 So why worry about making it functional then? It's either a display (Cheap) or a runner. I totally get what you are saying... but if they sell it as a running engine... then it should run, and be built well enough to be used for a reasonable amount of time. Let's face it... Glow Fuel is 20% oil... so stuff will get lubed. They need to use good materials, and build them to a good standard.

You must love AvE videos

BS. Some engines aren’t assembled in the factory with sufficient care and a knowledgeable owner can clean up (“blueprint”) and reassemble the engine to better than new. Now if a ham-fisted gorilla that has only Visegrips and hammers tears into one, well, no more needs to be said.

I agree with tech, I love this guy and what he does but this one was just too bad sorry I mean he couldn't get it to idle, and he always gets stuff to fully function. lol

@@tatundra6405 clearly you’ve never really worked on a rotary. All that he went through us rotary guys go thru on a daily. Cold starts are real. They can’t go long without apart is also real. If that little guy had a turbo it’s life expectancy is cut in have and the propellers are probably melted. That’s the general nature of a wankel. Mazda couldn’t get it right from factory to keep it in perspective but it was good enough to sell to the public.

@@subifudriftkings Agreed, as the owner of a few rotaries and currently an Rx8 at ~250k miles with 3 engine rebuilds all of this is normal. The internal clearances don't tighten up until it's warm so they hate cold starts even with modern computerized fuel injection. This looks like a pretty rudimentary carburetor setup, of course it's gonna hate starting. Also I was cringing the whole time he ripped it apart in a filthy environment, dirty hands, dropping parts, not bolting things back together right, and expecting it to run perfectly? The exhaust fell off ffs, that's not "rotaries suck lolol" that's you not bolting shit together. Also super bad for the exhaust ports which are already the weak point for most rotaries, the heat buildup is bad enough even with good header flow. Also, please center that flywheel and put either a heavier one or some load on the engine. This is like taking an LS, leaving the balancer and flywheel off, removing the rpm limiter from the tune, then starting it with your foot on the floor and expecting it to go well. If you want to spin anything to 1000 rpm let alone 30,000 rpm you had better make sure it's balanced. This little engine is cool but man this guy is handling it poorly. Even if it wasn't a rotary he should take a little better care of it especially for a demonstration. Also their technical manual says it's only supposed to run to 16,500 rpm. Go take a Honda motor, rip it apart in a sandbox, put it back together just enough to run, then spin it to 15,000 rpm and see what happens...

He'd better have a really accurate CNC cutter if he's going to machine THAT shape.

That would be sick. Wonder how it stacks up against the normal RC nitro engines. HP/torque and size comparisons.

They are $500, so just 50,000 ordinary pennies, doesn't need to be a pretty penny either.

So 4 rotor will cost around 2100-2500 it's cheaper then real one 60 000

@@Deep42Thought I'm not sure who pays $60k for a 4 rotor though, my RX-8 was $3250, so buy two whole cars (plenty of spares that way in case you wreck on the track), and you're at $7k plus probably less than $53,000 for someone to bolt two together. Also note the rotary is one of the easier engines to do that too, I chatted with a guy who built a 12 rotor engine from 6x RX-7 engines (I think it had 12 turbochargers in total), and then he sold it to fund his next new project build and toy. Its probably just about as expensive to turbocharge them, just the exhaust manifold was like $3k a year ago (its since gone down a lot, and yeah you could weld one yourself but I'm referring to just bolt together options). Then you have to find a tuner that specializes in turbo rotaries. Its cool, but its a mess.

I can guarantee you never will. They aren’t made correctly to maintain combustion chamber pressure at the lower RPM.

The mass is so low it would never do that. Hell, a full size rotary can barely do that.

Hell, why not a dozen?

@@phantom240 Considering how reliable those seem to be, you'd have to buy a dozen to end up with half a dozen for your project.

это Ванкель а не мазда

Thank you I really appreciate that, it wasn't easy to get to this point let me tell you a lot of pain and hard work not to mention a ton of money

@@WarpedPerception I'm really glad it payed off.there's nothing in the world more fulfilling than working hard and earning the deserved rewards. I'm sorry that I live in Iran and I'm not in a position to support this amazing channel other than sharing it with friends but anyone that can, should imo. Thank you again Wish you all the best🌹❤️

ye

Four rotary inline should have 2.8HP from this little bee. I can't wait till see them. Greatfull

@@alexsz.6530 could Power a little dingy 😂😂

a 50 cc moped in my countrie can legaly only have 1 hp. So yeah 0.7 on that engine is huge.

thats the claim to fame of rotaries. small engines making big power

Thank you

It’ll blow up