Squire,
Pyro stated outright that the AH Spitfire Mk IX is powered by a Merlin 61. If it were powered by a Merlin 70 it would be about 10mph faster on the deck, have a better climb rate and be about 8mph faster at best altitude.
Many Spitfire LF.Mk IXs and HF.Mk IXs had the normal wings. It is a misconception that LF.Mk IXs were all clipped and HF.Mk IXs were all extended. As a matter of fact, I've never seen a Spitfire HF.Mk IX with extended wings.
SlapShot,
No Spitfire F.Mk IX (all Spitfire F.Mk IXs were powered by the Merlin 61 or 63, the Spitfire in AH has a Merlin 61) had an "e", or "universal", wing. All Spitfire F.Mk IXs had a "c" wing in which the armament is two 20mm Hispano Mk II cannon and four .303 calibre Browning machine guns. No Spitfire F.Mk IX could be armed with .50 calibre Browning machine guns. While Spitfire F.Mk IXs all carried two 20mm cannon and four .303s, Spitfire LF.Mk IXs and Spitfire HF.Mk IXs could be found with either the two 20mm cannon and four .303s or with two 20mm cannon and two .50s.
You are in error about the way the F, HF and LF designations work. They have nothing to do with the wings. The F, HF and LF designations are determined by the version of Merlin engine in the aircraft. Merlin 61 or 63 means it is a Spitfire F.Mk IX. Merlin 66 means it is a Spitfire LF.Mk IX. Merlin 70 means it is a Spitfire HF.Mk IX.
No Spitfire F.Mk IX was ever powered by a Merlin 70. Those came later with the introduction of the Spitfire HF.Mk IX, which entered service after the Merlin 66 powered Spitfire LF.Mk IX.
(Yes, the AH Spitfire Mk IX can carry two rockets.)
Roughly 300 Spitfire F.Mk IXs (like we have in AH, minus the .50 cals and rockets) were built. A little more than 1,000 Merlin 70 powered Spitfire HF.Mk IXs were built and more than 3,000 Merlin 66 powered Spitfire LF.Mk IXs were built.
The Spitfire Mk IX in AH is the least representative of all Spitfire Mk IXs, and by a full order of magnitude in comparison with the Spitfire LF.Mk IX.