Ricardo was constantly frustrated during the war with Rolls - Royce 's ( RR ) efforts .
Sir Harry Ricardo , who specified the layout and design goals , felt that a reliable 4,000 HP military rating would be possible .
Sir was constantly frustrated during the war with Rolls - Royce 's ( RR ) efforts .
Sir Harry Ricardo , who specified the layout and design goals , felt that a reliable 4,000 HP military rating would be possible .