[I/JG27_Waggel]

The difference between both graphs is the performance in some regions. The character of the performance is nearly the same.

What is the meaning of "BF274" and "BS428". Is this somethig like a production number?

Edit:

Source of the yellow line: http://home.epix.net/~cap14/spit9v109g.html

Source of the gree line: http://www.spitfireperformance.com/spitfire-IX.html

The RAF pictures are great! hock:

Edit2:

Something wrong with the green line. This line does not belong to the "BS428" but to the "BS354". This plane was also in the report but I mentioned it as the "BS428". The "BS354" had a merlin 70 install and a Mk. XII rudder.

The "BF274" is a "BS274" but it was painted incorretly .

I will check the performace data of the "BS428"