Page 142 - The Jet Engine

Rolls-Royce contra-rotating fan (concept)

The Sapphire originated in 1946 with the
Metrovick F9, which was handed over to
Armstrong-Siddeley when Metropolitan-
Vickers withdrew from aviation in 1947. The
Sapphire first ran in October 1948 and the
engine was flight tested in Meteor, Hastings
and Canberra aircraft; before going into
production for the Gloster Javelin and Hawker
Hunter F2.

Armstrong Siddeley Sapphire