Tam has spent a lot of time and money on this topic in the EDF world. The success of the TJ100 is this very issue. The exhaust air speed in the EDF world is everything, anyone can get enough static thrust to get a jet off the ground but the winner is the guy who can have a significant amount of static thrust once the jet is doing over 150mph. With an exhaust velocity of over 220mph out of the TJ100, Tam was able to successfully fly a 21.5 pound BVM MIG 15 with only 12 pounds of static thrust.

What this means...thrust is thrust is thrust, yes...but exhaust speed is EVERYTHING in the EDF world! For turbines it would be the same although the mesurable differences would be much smaller when all of the turbines produce extremely high exhaust speeds.

Russ