View Full Version : Ralph O.'s latest bomb

05-13-2008, 12:36 AM
"... at the beginning of climbing I found 153A = about 3000watts.after 10 sec and under full throttle only 1900 watts are needed to hold the vertically speed of 50m/s.after motor cut off climbing is more than 100m! ..."

a hot direct drive outrunner (
adLRK winding diagram (

Other bombs by Ralph:
powercroco speedcroco18-8 (
powercroco speedcupcroco (
powercroco speedcroco5x1,18YY (

(use e.g. for automatic translation of the last 3 links)

Vriendelijke groeten ;) Ron van Sommeren
• int. electric fly-in (, Nijmegen, the Netherlands
• brushless motor building tips & tricks (
• diy brushless motor ( discussion group
• Drive Calculator ( download & discussion group


05-14-2008, 10:31 PM
I forgot to mention it's an outrunner :) (as usual for Ralph, he only builds outrunners: