this is more than compensated for by a stratospheric rev-limit of 9,000 rpm

The top engine is a twin rotor unit developing 247 horsepower at 8,500 rpm. The rev limit is an impressive 9,000, so those rotors really hum under full power. The other powerplant is of similar layout, but develops 207 horsepower at 7,200 rpm and redlines at 7,200 rpm.