Hmmm . So you can tell the difference between an oil cooler and a radiator at 300mph and a few hundred feet can you? The MkIX was "quick fix" to the FW-190 problem. They converted Spit Vc to merlin 61 engines(two-stage merlin) . This entailed modding the cooling system and fitting an additional external radiator in place of the oil cooler unit under the starboard wing, new engine cowlings and a four blade rotol propellor were required. Eventually 5665 of them were built mostly at castle bromwich in Birmingham.
To quote Jeffrey Quill from his book"Spitfire". "The great thing about the appearance of the MkIX was that it was extemely difficult to distinguish a MKIX from a MKV in the air".
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04-10-2011, 12:15 AM
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