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Thanks Andy and Dan San,
I read in Windsock Datafile No 72 (Airco DH9) by JM Bruce that:
" the true BHP was produced in relatively small numbers by the Galloway Engineering Co.,its large scale production was in the hands of Siddeley-Deasy (...).Unfortunately in more than one official record these
two different and non-interchangeable engines were quoted as " 230-hp B.H.P." without differentiation.
It would seem therefore that it was just a matter of record keeping, the true output of the Galloway Adriatic and that of the Siddeley Puma being 230 and 200-hp respectively.I still can't understand however why,for example, Ray Sturtivant in *"The DH4/DH9 File" cites some production series powered by the 200-hp BHP (thus the Siddeley Puma) and others by the 230-hp Puma (thus the Galloway Adriatic), has he falled in the same confusion? (I can't believe that).
Thanks in advance
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