A former World War II RAF air base near York has reverberated to the sound of an iconic British bomber engine for the first time since 1945. The Bristol Hercules engine, as used on Halifax heavy ...

Bore and Stroke: 146 mm (5.75 in.) x 165 mm (6.5 in.) In 1926 Bristol began studies to integrate the Burt-McCollum sleeve valve concept into selected new engine designs. The sleeve valve, which moved ...

Its production has spanned essentially half the history of powered flight. With its distinctive pudgy shape tugged along by four mighty - and mighty noisy - turboprop engines, the Hercules is a ...