Gipsy Queen Series 30 Engine

GB Series 30 1950s

Straight 6 cylinder air cooled inverted engine developing 200hp.
Used in the De Havilland DH114 Heron, a 4 engine version of the Dove.
Ex Connair Heron  engine removed from the  aircraft when  the  aircraft was  re-engined  with Lycomings.
CONNAIR was a Territory airline using these aircraft extensively.

For more technical details on the De Havilland Gipsy Queen Series, see Wikipedia.