I saw this a couple of years ago, its a pretty nice rotary engine. As others have pointed out, rotary engines have their challenges but their advantage in weight and torque still makes them a good choice for aircraft.
The "secret sauce" that the Liquid Piston folks bring to the party is the upgraded rotor shape. It doesn't need apex seals like the old Wankel version did. The news here is that they had reduced their experimental work into an actual functional engine. Unlike the Wankel, their cylinder design would really support a compact multi-rotor engine but presumably you could gang them together on the same crankshaft if you really wanted to.
Other than the UAV and possibly the paramotor market I'm not sure where these guys are going to find customers though.
The "secret sauce" that the Liquid Piston folks bring to the party is the upgraded rotor shape. It doesn't need apex seals like the old Wankel version did. The news here is that they had reduced their experimental work into an actual functional engine. Unlike the Wankel, their cylinder design would really support a compact multi-rotor engine but presumably you could gang them together on the same crankshaft if you really wanted to.
Other than the UAV and possibly the paramotor market I'm not sure where these guys are going to find customers though.