04-01-2021, 11:04 AM
Alan , I've just dusted down my 1931 copy of Ricardo's ' The Internal Combustion Engine ' . A complete chapter is devoted to
' Influence of form of Combustion Chamber ' and the ' Shock Absorber ' Head as he called it is detailed , with test results etc., .
The pocket can be over either the inlet or exhaust valve and the spark plug over either valve , depending on what rate of burning you want to achieve. He also states that ' although the sparking plug is no longer centrally situated , the 'Shock Absorber ' type of head is very slightly better than the ordinary turbulent head '
Personally I think the very similar Whatmough - Hewitt patent combustion chamber is an improved design due to the chamber shape.
As I run one of each type of head I'm not too biased .
I will bring the book along at the first convenient Bert Hadley .
Geoff.,
' Influence of form of Combustion Chamber ' and the ' Shock Absorber ' Head as he called it is detailed , with test results etc., .
The pocket can be over either the inlet or exhaust valve and the spark plug over either valve , depending on what rate of burning you want to achieve. He also states that ' although the sparking plug is no longer centrally situated , the 'Shock Absorber ' type of head is very slightly better than the ordinary turbulent head '
Personally I think the very similar Whatmough - Hewitt patent combustion chamber is an improved design due to the chamber shape.
As I run one of each type of head I'm not too biased .
I will bring the book along at the first convenient Bert Hadley .
Geoff.,