The rocket motors used were the Bristol Aerojet Mk 52 mod 2 and the Rocketdyne Mk 38 mod 4 rocket motor; the latest is the Aerojet Hoopoe.
With air-to-air missiles odd numbers indicated radar seekers like the Rb 71 or Sky Flash, even numbers indicate IR seekers like the Rb 98 or IRIS-T off-boresight air-to-air missile.
•
Rb 71 The British Sky Flash semiactive air-to-air missile operated by the JA 37 viggen