FN & BP Turrets
Apologies if this question is in the wrong place.
Does anybody know whether any books have been written (or any comprehensive websites) on the Frazer-Nash and Boulton Paul turrets? I am aware of a couple of books which include some info on some of the turrets (Flying Guns: World War II by Williams being one) but I'd like details of the lesser known variations. I believe "Boulton Paul Aircraft Since 1915" contains some information - does anybody have a copy, and would they recommend it for the turret information?
Cheers
A
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