Hives & RR were very much focused on their Merlin , Griffon then Eagle and finally Whittle 's jets , which all had a clearly defined production purpose .
Ricardo was constantly frustrated during the war with Rolls - Royce 's ( RR ) efforts .
Hives & Rolls - Royce were very much focused on their Merlin , Griffon then Eagle and finally Whittle 's jets , which all had a clearly defined production purpose .
Ricardo was constantly frustrated during the war with Rolls - Royce 's ( RR ) efforts .