Napier Cutlass
The Napier Cutlass was a six cylinder opposed piston compression-ignition engine originally designed by Junkers Flugzeug und Motorenwerke AG. Hugo Junkers created several opposed piston CI aero engines and the Cutlass was based on the Jumo 205 engine but re-drawn to imperial measurements.
This engine design was never manufactured by D Napier & Son however examples of the larger Napier Culverin engine were built and tested.
