I can't remember what thread it was but there was a short discussion about the service ceiling of aircraft. Well, in the RAF during World War 2 'service ceiling' was the height at which the aircraft would climb less than 100 feet per minute.
The Spitfire PR.XIX had a 'service ceiling' of 42, 600 feet but it could fly far beyond that - sometimes recorded heights up to 55,000 feet while spying over China.
Since the Spitfire VI and VII were reported as intercepting Ju-86 aircraft at 45,000 - 50,000 feet - the Ju-86 was obviously flying at those altitudes.
The Spitfire PR.XIX had a 'service ceiling' of 42, 600 feet but it could fly far beyond that - sometimes recorded heights up to 55,000 feet while spying over China.
Since the Spitfire VI and VII were reported as intercepting Ju-86 aircraft at 45,000 - 50,000 feet - the Ju-86 was obviously flying at those altitudes.