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Re: Questions reg. Bristol Hercules VI, X, XVI engines
just an additional bit,
Fortress's had Wright 9 cylinder motors.
Bore & Stroke = 6.125 in x 6.875 in
Liberators had Pratt & Whitney 14 cylinder motors
Bore & Stroke = 5 1/2 in x 5 1/2 in
Re: Pistons
Hurcules
Flat crown
Short skirt
2 compression rings
2 scraper rings one above and one below the gudgeon pin
Gudgeon pin retained by circlips
BMW
Flat crown recessed to clear valves
3 compression rings
1 channelled ring above gudgeon pin
1 bevelled scraper below gudgeon pin
Gudgeon pin, hollow retained by floating keeper rings held in by circlips
Wright
3 compression rings
3 oil control rings
Bottom ring inverted
Pratt & Whitney
3 compression rings
1 scraper ring
1 oil control ring
hope it all helps
Alex
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