What is it ?
MPN11,
Thank you for your painstaking research ! (YLSNED). I never knew that Browning made a gas-operated gun (thought they were all recoil-operated).
Obviously, the low rate of fire (one-third that of our WW2 aircraft Brownings) made the cooling problem much easier, but the gun much less suitable for high speed aircraft use.
When I went through ITW in June '41, they couldn't spare any Brownings for us to practise on, so we had to make do with the old Vickers "K" G.O. gun (don't think I could strip one down now, though !) But it was a good gun in its time, I'm told.
Cheers, Danny.