The issue, as it has pretty much always been, is environmental. While the Wankel rotary engine does indeed make a lot of power in a small, lightweight package, it does so while burning lots of ...

Although there was briefly a company called Rotary Rocket ... and offers very smooth power transfer and high power to weight ratio. The downside, though, is that the engine deliberately burns ...

The model’s rotary engine is also intended as a backup for power production in emergencies and other contingencies. For example, if a household consumes 10 kilowatt-hours daily, electricity can ...