[Felix C]

I recall from a magazine of the 1970s there was an article on the French Flying 75. IIRC it was an all metal trimotor monoplane fitted with a 75mm sideways firing cannon.

I did a search and see In 1932, French military designers installed a fixed side-firing Schneider P.D. 12 75 mm cannon in a four-engine Bordelaise A.B. 22 bomber.
That is not the one I remembered as in the photos it was a smaller three engined aircraft. had that corrugated exterior as used by the JU52.

Anyone familiar with this aircraft? Maybe my memory is faulty.

It may have been in one of those aircraft enthusiast magazines. I thought maybe SOF and found an archive and no joy.