See-through jet engine video.

[Garfly]

 

 

 

 

 

... and Rotary, too:

 

 

 

[KRviator]

That's cool to watch. 

[Old Koreelah]

That second engine seems to be the inverse of a Wankel rotary: triangular chamber, double-circular rotor, giving three power pulses per rev. The potential of a V-12 in your microlite!

[onetrack]

I'm intrigued by the Liquid Piston engine, and how it's going to go, as regards reliability and longevity. The designers ideas on the combination of cycles sounds good - but the real test is going to be how the sealing and durability of the rotor holds up, after say, 300-500 hours of continuous full power production.

The heat and pressure on those seals that seal against the outside of rotor must be enormous under continuous, extended load. Then there's the need for extended life of the side sealing of the rotor to deal with.

 

I don't see how that sealing works, is it totally reliant simply on close tolerances for sealing? If so, then those extremely close tolerances must be maintained for the life of the engine, and that is going to rapidly become difficult.

Then there's the close operating tolerances of the outside of the rotor. That appears to be very dependent on the large ball bearing on the crankshaft. What happens when the bearing wears, and develops a couple of thou operating clearance?

The rotor will then start to wobble and contact the outer housing, creating conditions for extremely rapid wear.

 

What is the engines tolerance for overheat, overload, or a bit of dust? All these conditions are real-life operating conditions, that every engine has to deal with.

An engine lab can produce remarkable results with all newly-produced components, but it's real-life operation "in the field" that shows up whether you have a viable and durable product or not.

Then there's emissions and economy to deal with. Not much point in a new engine design, if emissions and economy goes backward over previous designs.

I see the Liquid Piston engine as having the same problems as the Sarich Orbital Engine - insurmountable sealing problems, and emission and economy problems - all of which, not even the combined abilities of Ford and GM engineers could overcome.

[facthunter]

Or NSU. The concentrated heat in a few places is an issue. Distortion and emissions. Nev

[IBob]

1 hour ago, facthunter said:

Or NSU. The concentrated heat in a few places is an issue. Distortion and emissions. Nev

I was in Germany when the NSU RO80 was introduced.

It was a beautifully engineered car, futuristic for it's time.

Part of the promotion was the claim that the faster the thing went, the more economical it became, a concept that new owners embraced with relish, there being no speed limits on the autobahns.

They sold well initially, but not so much thereafter.

NSU nearly went broke trying to maintain them, and owners took to holding up 1, 2 or 3 fingers as they passed each other, to indicate how many times they had had the tip seals replaced under warranty......

[Garfly]

13 hours ago, Old Koreelah said:

That second engine seems to be the inverse of a Wankel rotary: triangular chamber, double-circular rotor, giving three power pulses per rev. The potential of a V-12 in your microlite!

This guy agrees - when he gets to the Liquid Piston at #1 :

 

 

 

And this the transparent Wankel:

 

 

Edited June 20, 2022 by Garfly

[Garfly]

 

But how about a full-sized see-through?  No problem.