Seriously, though, what practical uses, especially once it gets all of the emissions components added? And how noisy? Will it run a generator? Put in trunk of Tesla to recharge it on the road?
There are several of these Internal Combustion engines that are small, light, and power dense for their size, but not really scalable to larger engines. And they're incredibly expensive to manufacture. LiquidPiston is another.
The anticipated use for these small, light, and powerful engines is to power military drones.
” Put in trunk of Tesla to recharge it on the road?”
It is an ICE engine. A Tesla will not recharge it.