RC-Monster Forums - View Single Post

BrianG · 04.26.2009, 05:28 PM

That is a tricky one. Any BL motor small enough to have less power will probably also heat up because it is too small for the job. You could take a page from Novak's book in what they do with their HV line and use a smaller diameter motor and just spin it at higher rpms. So, something like a 380 size motor with a kv that will get you ~50k rpm at whatever voltage you run. Then, just gear it down. Will take a bit of figuring to determine the smallest gearing possible so that you won't be cruising at 80mph, lol.

How about a Neu 1112/1.5D on 3s? That will put the rpms at around 54krpm when wound out. From Griffin's graphing program, Neus retain pretty good efficiency up to around 57k rpm. And anyway, you won't be hitting that max rpm unless you are at WOT, which most people aren't most of the time.

	(#5)
BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	04.26.2009, 05:28 PM That is a tricky one. Any BL motor small enough to have less power will probably also heat up because it is too small for the job. You could take a page from Novak's book in what they do with their HV line and use a smaller diameter motor and just spin it at higher rpms. So, something like a 380 size motor with a kv that will get you ~50k rpm at whatever voltage you run. Then, just gear it down. Will take a bit of figuring to determine the smallest gearing possible so that you won't be cruising at 80mph, lol. How about a Neu 1112/1.5D on 3s? That will put the rpms at around 54krpm when wound out. From Griffin's graphing program, Neus retain pretty good efficiency up to around 57k rpm. And anyway, you won't be hitting that max rpm unless you are at WOT, which most people aren't most of the time.