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“Inside-out Wankel” rotary engine delivers 5X the power of a diesel

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Re: “Inside-out Wankel” rotary engine delivers 5X the power of a diesel

#21

Post by shadycuz »

causi wrote: post #14

Ok, so they're "shooting for" a performance of 1hp per 1.57 lbs of engine weight. A Toyota Camry engine produces 1hp for every 1.41 lbs of engine weight. It produces 1ft-lb of torque for every 1.94 pounds of engine weight, compared to 1.58 for the Camry. How is this revolutionary motor being outdone by a mid-range sedan engine?

The engine is the size of a push mower.

> XTS-210 is about the size of a basketball, weighs in at 19 kg (42 lb), and displaces 210 cc.

So you are talking about a 26HP lawn mower.

While the Camry might make more power at its normal size. It would not if you scaled it down to the size of a basketball. I'm guessing it would make 1-3HP at that size.

Re: “Inside-out Wankel” rotary engine delivers 5X the power of a diesel

#23

Post by Cockbrand »

Surely the engineers who came up with this are a lot smarter than myself, but to me it looks like the lower half of the rotor rotates into the combustion and thus has to work _against_ its force. If this is true, I'd assume that this takes away a lot of effectiveness.

Re: “Inside-out Wankel” rotary engine delivers 5X the power of a diesel

#24

Post by bagels »

jldugger wrote: post #15

I guess the "inside out" is that the rotary block is also the fuel injector? Would have to read more to figure out how they get fuel into a thing moving at thousands of rpm.

That is unlikely, it's probably in the housing, just like a wankel.

Re: “Inside-out Wankel” rotary engine delivers 5X the power of a diesel

#25

Post by Supermancho »

mywittyname wrote: post #17
Supermancho wrote: post #6

Earlier quoted context omitted.

My near-mint condition 2009 Mazda RX-8 never had a Wankel engine problem (over 100k miles). It would have easily lasted another 5 years without a doubt or hiccup. Wankels are usually excluded from all engine comparisons, because it's a considered a different class...for piston engine marketing reasons. I sold off my RX8 in 2018 because my fiancee and I moved to Seattle (passing emissions testing wasn't anything speci…

More antic-data: i worked with a guy whose brand new RX-8 needed two engines in the time we worked together. Granted, his was a 04 automatic, which is the worst combo. But still, Mazda didn't go out of their way to extend the engine warranties on the early RX-8s for no reason. Did you happen to have an 08+ model with the updated engine and/or remove teh catalytic converter?

Yes, the model was 2009 automatic (updated my initial post for clarity). No, I did not remove the converter.

Re: “Inside-out Wankel” rotary engine delivers 5X the power of a diesel

#26

Post by jutrewag »

Cockbrand wrote: post #23

Surely the engineers who came up with this are a lot smarter than myself, but to me it looks like the lower half of the rotor rotates into the combustion and thus has to work _against_ its force. If this is true, I'd assume that this takes away a lot of effectiveness.

[dead]

Re: “Inside-out Wankel” rotary engine delivers 5X the power of a diesel

#27

Post by bagels »

Etheryte wrote: post #19
jldugger wrote: post #15

I guess the "inside out" is that the rotary block is also the fuel injector? Would have to read more to figure out how they get fuel into a thing moving at thousands of rpm.

We do this all the time with cylinders, no? I don't see how this is any different.

They were, I think, imagining placing the fuel injector on the moving part itself (eg the piston) which doesn't makes much sense to do, taking the inside out bit to the extreme.

Re: “Inside-out Wankel” rotary engine delivers 5X the power of a diesel

#29

Post by jutrewag »

bagels wrote: post #27
Etheryte wrote: post #19

Earlier quoted context omitted.

We do this all the time with cylinders, no? I don't see how this is any different.

They were, I think, imagining placing the fuel injector on the moving part itself (eg the piston) which doesn't makes much sense to do, taking the inside out bit to the extreme.

[dead]

Re: “Inside-out Wankel” rotary engine delivers 5X the power of a diesel

#30

Post by 93po »

shadycuz wrote: post #21
causi wrote: post #14

Ok, so they're "shooting for" a performance of 1hp per 1.57 lbs of engine weight. A Toyota Camry engine produces 1hp for every 1.41 lbs of engine weight. It produces 1ft-lb of torque for every 1.94 pounds of engine weight, compared to 1.58 for the Camry. How is this revolutionary motor being outdone by a mid-range sedan engine?

The engine is the size of a push mower. > XTS-210 is about the size of a basketball, weighs in at 19 kg (42 lb), and displaces 210 cc. So you are talking about a 26HP lawn mower. While the Camry might make more power at its normal size. It would not if you scaled it down to the size of a basketball. I'm guessing it would make 1-3HP at that size.

A Traxxas 5407 TRX 3.3 engine used in RC cars makes 1.42 horsepower, weighs 305 grams, and fits in the palm of your hand.

This is 1hp per 0.46 pounds of engine weight, nearly three times better than the camry engine.

Granted an RC engine runs on a mixture of fuel and nitromethane, and doesn't have any reasonable durability compare to a Camry engine. But it also only costs $200.

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