Planes speed chart ...It's updated last time since ver 1.51 afair ... Or is it too inconvenient or jobby thing to do? <S>
full time of work is about 2 hours per airplane and about 2.5 full days for all planes. it's done by robot that is not functional nowadays. actually source code of robot is lost. but i keep in mind this problem and will try to program it again after reprogramming DM.
There is a possibility to upload your own speedtests. At the wiki is a link to the Log Upload. You can also compare the results.