Magnet dimensions

[GriffinRU]

Originally posted by RC-Monster Mike
Who said anything about comparing a 5000Kv motor to a 1000Kv motor? My comparison was based on similar sized and Kv motors(1930/8 vs. xl2800 or a 1930/9 to an xl2400 for example). The basic xl series are labeled as 1300 watt motors, while the 1930s are labeled as 1200 watt motors. They are similar in size, similar in winding construction, but the 19 series have a segmented magnet(and run noticeably cooler as well).

Mike you forgot about current...
To get 1200W from xl2800 you need 72A
1300 from 1930/8 only 30A
And difference in losses associated with current would be by far greater then magnets.
Artur

P.S. Higher voltage applications more efficient always.