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Some maths: perf at 6k / 19°F

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Senior Member
Jan 9, 2011
Reaction score
Let's do some math:

The other day I had at 6k feet (QNH 1024) 155mph with outside temp -7°C (19°F), so 10°C / 18°F lower than ISO, 2600RPM (so bout 75% at FL50 Density Alt)

Density altitude should be around 5,2K according to tables

=> What would have been the plane performance at ISO conditions ?


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