1515/1y vs. 1515/2.5d

[jnev]

suicide - I actually said the 1515/2.5d. This stuff gets very confusing, but I must say very interesting as well.

I am still not sure which would suite me better though. I would like to be right around 40mph, but any higher would be fine with me.

Has anyone ran a 1515/2.5 geared very high? Did it still run efficiently and run cool?

BrianG - So what you are saying, is that it would be better to gear down on a high KV motor rather than gear up on a low KV motor? Would it run cooler this way?