This looks like an interesting engine.

[flying dog]

(As planes were mentioned as it's main use)

 

 

[Marty_d]

I like it. Seems like less to go wrong.

[onetrack]

That bloke has definitely missed his lifes calling - as a Sign Language interpreter beside the news reader!

 

That new engine produces no worthy advances in IC-engine design - it merely contains all the problem of a piston engine, along with all the problems of a rotary engine!

[Marty_d]

Well, not ALL the problems... It ditches valves, most of the gearbox, has lower torque twist and vibration.

Plus the presenter kept it interesting.

Not sure how many pilots would want to fly behind a Knob though.

Someone didn't do their "does this name mean something rude in English" check.

[onetrack]

They're designing a new horse to prevent the motor car from taking over. The future is not in complex, high maintenance, fossil-fuelled engines - the future is in electric motors and batteries.

 

YASA, a Mercedes Benz subsidiary, is now producing axial-flux, lightweight electric motors - that are being designed and utilised as wheel motors in EV's.

 

They are going into high-end machines at present, such as Lamborghinis and Ferraris, but very soon, you will see your average EV comprising a drive train that consists only of 4 wheel motors.

The weight-saving is predicted to be around 500kg for the average redesigned EV in the future.

 

The axial-flux motor design has been perfected by a British scientist, and YASA now has a U.K. factory producing these motors, and YASA is actively looking for more uses for them - with Defence and Military use on their radar.

 

Aviation use is a no-brainer for these axial flux motors. How does a continuous 500HP from a 13kg motor sound? That makes for plenty of weight saving for more batteries for the power source.

Battery charging technology is now down to 10 mins to get to 80% recharge. The future is electric, despite what Trump wants to see.

 

https://yasa.com/about/

 

https://yasa.com/news/yasa-smashes-own-unofficial-power-density-world-record-pushing-state-of-the-art-electric-motor-to-staggering-new-59kw-kg-benchmark/

 

Soft Magnetic Composite Material is the secret sauce that is rapidly advancing electric motive power, it really is a game-changer.

 

Edited December 23, 2025 by onetrack

[BurnieM]

What is their TBO and show me 10 planes that have reached TBO without major work ?

Also, show me a battery with min 3-4 hours (6+ would be better).

And decent useable weight with comparable price to ICE equipped.

 

It may be the future but right now I do not want to pay more for less.

 

[turboplanner]

Go back over a decade or so of wasted posts and you'll see the trend.

The only new products that count announce their specifications  when the product is released for sale.

Edited December 23, 2025 by turboplanner

[facthunter]

The Problem with most of those "whacky" motors is sealing the Pressure and the area of the combustion Chamber. I NEVER ever believed the SARICH engine would be a Goer and it wasn't. The Wankel at Least went into Production mostly due to the Persistence of Mazda (Toyo Cogio?) but it's not thermally efficient or able to meet tight Pollution standards. .  Nev

[flying dog]

I am torn between agreeing and not with that Nev/Facthunter.

 

Yes, there is a bias with how things get support and backing.  But if it is a new idea and has merit, then it will survive.   Otherwise it won't.

 

Why is it we have to put down people trying things?

It may be a piece of crap.   It may not be.  I'm not saying throw money at it.  But at least let it be tried.

 

It is only through trying things that we can move on from where we are to newer places and better ideas.

[turboplanner]

1 hour ago, facthunter said:

The Problem with most of those "whacky" motors is sealing the Pressure and the area of the combustion Chamber. I NEVER ever believed the SARICH engine would be a Goer and it wasn't. The Wankel at Least went into Production mostly due to the Persistence of Mazda (Toyo Cogio?) but it's not thermally efficient or able to meet tight Pollution standards. .  Nev

It's Toyo Kogyo. Matsuda in Japan (with a silent "u")

It was a very efficient motor; I would rebuild mine with the engine in my lap.

Its problem was burning the seals at the Apex. I could replace my seals on a Saturday,  but doing that every two or three months wasn't practical.

 

 

 

[facthunter]

They are NOT fuel efficient and never can be. Too much combustion chamber area. Inherent in the design. Nev

[turboplanner]

7 minutes ago, facthunter said:

They are NOT fuel efficient and never can be. Too much combustion chamber area. Inherent in the design. Nev

Propaganda.

I never ran out of fuel in mine, which could spin the rear wheels at 170 km/hr

Edited December 24, 2025 by turboplanner

[facthunter]

They aren't made any more. They are too thirsty and Polluting. .They don't chuck bit's out the side like reciprocating Engines do.  Nev

[turboplanner]

Mazda is still manufacturing rotary engines, the latest one being used as the regenerative motor in a hybrid.

[facthunter]

Interesting, but they are not fuel efficient, for reasons I have explained. and the engine oiling is similar to a 2 stroke so I can't see how it would Pass Pollution standards easily.  Hybrid motors get a Hard time.  Nev

[turboplanner]

57 minutes ago, facthunter said:

Interesting, but they are not fuel efficient, for reasons I have explained. and the engine oiling is similar to a 2 stroke so I can't see how it would Pass Pollution standards easily.  Hybrid motors get a Hard time.  Nev

I'd suggest you stop explaining because that's BS. I owned one and paid for the fuel. Engine oiling 55 years ago may have been like a 2 stroke, but the engine is compliant today. Driving a generator is not a hard time.

[facthunter]

It's recognised by anyone who knows about hybrids that the  ICE Motors get a Hard time. Also that the Fuel/HP is Poor with a Wankel design and the reason is excess combustion chamber AREA to volume which is inherent in the design. Sealing will also always be a challenge as well as distortion with VERY uneven heating.   Nev

 

[BrendAn]

4 hours ago, facthunter said:

It's recognised by anyone who knows about hybrids that the  ICE Motors get a Hard time. Also that the Fuel/HP is Poor with a Wankel design and the reason is excess combustion chamber AREA to volume which is inherent in the design. Sealing will also always be a challenge as well as distortion with VERY uneven heating.   Nev

 

Why does the ice motor get a hard time. Is revving harder than normal or highly loaded turning the generator. Can you explain what you are talking about. Thanks

[facthunter]

Started without being warmed up straight to full Load. Kills motors,  Like Emergency Generators.  Nev

[facthunter]

Shutting them down suddenly from high Load is also bad. Nev

[Arron25]

4 minutes ago, facthunter said:

Shutting them down suddenly from high Load is also bad. Nev

How relevant is the shutdown 'frigteners' with regard to the rotary with no reciprocating mass?

[facthunter]

It's a TEMPERATURE thing and a Wankel has  a lot of Variation of temps and distortion issues. When the Motor stops, the coolant also stops circulating.  Better to idle briefly.  The Rotor doesn't just spin either. It passes from hot to cold areas, and runs around the Periphery of a Gear.  Near the exhaust Port it's VERY hot.  Nev

Edited December 26, 2025 by facthunter

[BrendAn]

2 hours ago, facthunter said:

It's a TEMPERATURE thing and a Wankel has  a lot of Variation of temps and distortion issues. When the Motor stops, the coolant also stops circulating.  Better to idle briefly.  The Rotor doesn't just spin either. It passes from hot to cold areas, and runs around the Periphery of a Gear.  Near the exhaust Port it's VERY hot.  Nev

the owner of titan aircraft said the nicest engine he tested in the titan tornado was a mazda rotary but he didn't go any further with it because the exhaust was too hot for the pusher installation.

[onetrack]

The Apex seals in the Mazda Rotary are their weak point. Plus, their dreadful thirst - not what you want when you have limited fuel-carrying ability.

[facthunter]

Hard to silence them too.. Nev