AN air-cooled 24-cylinder aero engine, the Napier-Dagger, has just completed its 100-hour Air Ministry type test. It has already been flown for more than sixty hours in a Hawker Hart day bomber ...
Napier "Rapier" air-cooled aero engine ; Napier-Halford "Dagger" air-cooled aero engine ; turbo blowers for pressure-charging diesel engines ; "Naiad" gas turbine aero engine ; Napier "Lion" ...
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