RB.44 Tay was developed from the Nene engine of 1945. Like the Nene,
the Tay was made famous by license-built versions built outside the
United Kingdom. The Tay was built by Pratt & Whitney as
the J48 and by Hispano-Suiza as the Verdon.
Over 4,000 P&W J48s were produced between 1949 and