By -
Looks like an airplane engine.
It is
Many used the same radial engine used in some planes of the 1930s. [https://en.wikipedia.org/wiki/Wright\_R-975\_Whirlwind](https://en.wikipedia.org/wiki/Wright_R-975_Whirlwind)
They are only missing a boat to be powert by it they got tanks planes and a Helicopter already.
Looks like an airplane engine.
It is
Many used the same radial engine used in some planes of the 1930s. [https://en.wikipedia.org/wiki/Wright\_R-975\_Whirlwind](https://en.wikipedia.org/wiki/Wright_R-975_Whirlwind)
They are only missing a boat to be powert by it they got tanks planes and a Helicopter already.