I've got one of the new 16/25/2's, and it turned out to be a bit of a disappointment...
In my Kyosho EDF tests, it turned out to be a little less efficient than even the 16/15/x series!
I don't know if I have a bum motor, or what, but the numbers don't make a lot of sense...
I'm going to reserve final judgment until someone else tests this motor in a similar manner.
I've included the Excel file, but be careful to compare apples to apples. (Be sure to pick a consistent target RPM, and try to find a match across all the motors, as the apparent "efficiency" (RPM/Watt) will increase as the power level drops)
I'm in the midst of trying to get a high-end power supply, so I can test motors in a completely consistent manner. (like this: http://cgi.ebay.com/ws/eBayISAPI.dll...category=32720
, but I'm waiting for a 0-20V, 0-50A version to appear on E-Bay)
Essentially, a power supply like this one will allow you to pick a target RPM for a given prop/fan, and them simply increase the voltage until you meet that RPM with each motor under test.
You then record the amps drawn, and move on to the next motor
(I attempt to simulate this with different battery counts/types, but it's a bit of a crap-shoot the get the RPM you're looking for)
I now have a MiniFan 480, so I can do a lower-load test as well.
Hope this helps.