ROAR News

ROAR would like to announce the final rules for 25.5 brushless motors, effective immediately

October 15, 2015

ROAR Spec 25.5 motor: Only three slot "Y" wound stators are permitted. No delta wound or slot less stators are allowed. Only circular (round) pure copper magnet wire permitted. The three slotted stator must be wound with 25.5 turns of two strands of wire with a maximum diameter of .643mm per slot. The minimum resistance between any 2 phases of the motor (AB, AC, BC), when measured at 25C with an Instek GOM 802 milliohm meter, will be no less than 101 milliohms. The stator stack length must be a minimum of 19.7mm and a maximum of 21.0mm. Only 12.3 mm diameter rotors will be permitted in 25.5 Spec motors and the diameter must measure 12.30 +/-.05 mm. The rotor magnet length must be between a minimum of 25.0mm and a maximum of 26.0mm, not including any balancing material."

ROAR Events


March 9 - March 11, 2018
Murfreesboro, TN
Register Online      Race Entries
April 26 - April 29, 2018
Cape Coral, FL
Register Online      Race Entries
June 14 - June 17, 2018
Lake City, FL

July 19 - July 22, 2018
Omaha, NE

August 16 - August 19, 2018
Chandler, AZ

September 20 - September 23, 2018
Pompano Beach, FL


National Race Results