In a recent post Badboy indicated the EM diagrams needed updating due to the new FM's. He also indicated he wasn't doing as many as he used to and would be looking for some assistance in generating the new EM diagrams.
I for one would be interested in learning how to collect the flight data needed to generate the EM charts. I recently learned how to flight test for turn radius/rate (thanks Widewing) and have been conducting some flight tests in an attempt to duplicate WW/Soda's radius metrics -- getting close. The flight testing requires better flying skills than I currently posess.
I agree though, for an overall performance "picture", the EM diagram is the way to go - and if you want to compare two aircraft, superpositioning two EM charts really tells a lot!
Regards,
Optiker