Indeed it is, Mike. I was also surprised when a search of this thread produced a negative response. I had thought that such an oddity would have been too appealling not to have made a prior appearance here!
While looking up info on the Mann & Grimmer M.1 found out that in 1914 the Edward brothers had patented a synchronizing gear to enable guns to be fired through the revolving airscrew of a tractor airplane, their Patent was No.23790 A.D. 1914. For some reason best known to the War Office, whence a working model of the gear was sent, no more was heard of the device.
Interesting you just hear about the Germans doing it.
I've been reading up about interrupter gears in the splendid 2-volume 'British Aircraft Armament' by R Wallace Clarke. Apparently the first of the Allies to come up with a system were Morane-Saulnier. Personally, I liked the idea of the triangular metal deflectors bolted to the inside of the prop. Must have been fun !
Anyway, my mystery is not British, although it is European. Here's a pic of the unarmed version -
Since I'm on a mini vacation while home get minor remodel. I'm in Sun Valley looking out for bad winter storm coming in. Anyway it's the
Caproni Ca.113/ CBSA KB-2 Chuchuliga
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