28.09.2008, 13:34
I partly agree with Davew:
In summer 1942 there came version Mk.IX with Merlins 61, 63 or 63A. Later version equiped with Merlin 66 was called Mk.IXB. Since this, hte Mk.IX planes were called Mk.IXA. It was confusing - Spitfires used A for 8-machinegun armament and B for 2 canons and 4 MGs. In 1943 Air Ministry ordered to rename Mk.IXA to F.Mk.IXC and Mk.IXB to LF.Mk.IXC..
Taken from: In the sky of proud Albion, written by Jiř
In summer 1942 there came version Mk.IX with Merlins 61, 63 or 63A. Later version equiped with Merlin 66 was called Mk.IXB. Since this, hte Mk.IX planes were called Mk.IXA. It was confusing - Spitfires used A for 8-machinegun armament and B for 2 canons and 4 MGs. In 1943 Air Ministry ordered to rename Mk.IXA to F.Mk.IXC and Mk.IXB to LF.Mk.IXC..
Taken from: In the sky of proud Albion, written by Jiř