Fan rotary engine applying Swirl gear.

The unequal speed rotation generated by the Swirl gear can be used for the engine if it is used for two Fan rotary.

By applying this gear system It eliminates the need for a piston or a complicated mechanism,
and can develop a twice high efficiency engine with the same combustion chamber volume.
It is lightweight and compact, so the number of parts is small, so development cost is low.

A reciprocating engine usually has one explosion each time it rotates twice.

The Fan rotary engine has two explosions each time it rotates two turns.
Use two fans instead of a piston.
Pistons, connecting rods, crankshaft, etc. become unnecessary.

High efficiency !!!

Simple structure
Less parts
Easy to manufacture
Low cost
Low vibration
Low failure
Easy maintenance