NZRalphy
Good story, it is great to see people working on simple high tech. Thanks Loz
Eddy
A bit late in the day for a new type of IC engine but this one sounds radical enough with huge weight savings to make its development worthwhile. It seems it will have a future replacing many small appliances power source like generators which are huge in the RV industry alone. Small enough to be included in most electric cars to save that range anxiety. So many uses for an efficient small light motor that could be petrol or diesel. As it's low emission IC I hope it's not suppressed by the green brigade or auto industry spare parts empire for uses where electric is totally imprectical.
Raycon
I can see it has potential, but you'll come up against the same longevity, lubrication and sealing problems that both Wankel and Orbital came up against.
Tom Lee Mullins
I think the Liquid Piston rotary engine has lots of potential; since it is a flex fuel engine. I think it has a future even when there are those saying ICE doesn't.
Chris Coles
It would have been nice to see some fuel burn figures; some comparison to existing engines. Having said that, considering the size and weight differences; if they can prove long term reliability, they have a definite market to address that will serve them very well indeed. Well done!
Bob Stuart
Could we please have an animation of the process next time?
Sastry Dasigi
Good to see Wankel engine's successor, without Wankel's problems. Good luck to Liquid Piston. Wish them great success!
akarp
ICEs are going to disappear just like paper printing 'disappeared.' /sarcasm

Fossil fuels still provide a higher energy density and have an established infrastructure. I think we will add 'cleanup' operations to mitigate pollution before we shift to renewable energy. We are generally moving closer towards science/mathematic limits given advances in materials/engineering. Hence why 'old' ideas can become practical with new materials.
michael_dowling
Unless it is powered by biofuel,it is just another way to destroy the climate.
Kpar
Bob Stewart go ahead and google Liquid Piston (good stuff on Youtube). This story is several years old- the military has been looking into use of this engine to power drones, I'm glad to see they're still working on it.

This is a marvelously simple device, and I could see it very well making huge inroads into power generation, both for hybrid autos and portables.