T-MOTOR Navigator MN1010 KV135

The Navigator MN1010 KV135 from T-MOTOR, a Chinese maker, is the variant of the heavy-lift outrunner MN1010 with the higher KV. It belongs to the heavy multicopters and is intended for propellers of 30 to 32 inches on 6 to 12S.

The motor weighs 645 g including the cable and measures 118 x 34 mm. At KV 135 and 47.56 V that works out to about 6,400 rpm at no load. Power and peak current, 4,930 W and 104 A, apply for 180 s; this fits about 47 V, that is 12S. The maximum thrust of 21,561 g is a test-stand value with the G32x11 propeller at 47.56 V and 100 % throttle, 33 times the motor's own weight. Compared with the KV90 variant, the higher winding goes with somewhat smaller propellers, 30 to 32 instead of 32 to 34 inches. Anyone comparing motors needs the same time base of 180 s.

Aircraft with such motors and loads easily exceed 25 kg take-off mass, the limit of the EU open category; above it an operational authorisation in the specific category is needed. In the open category, carrying dangerous goods and dropping material are not permitted. Remote ID is mandatory for C1 to C3. Motor, ESC and battery must share the same cell count.

In selection the cable counts: the 645 g includes it, and its exit from the housing is a weak point under vibration. Large propellers create radial loads in gusts and load changes that stress the bearings. Also check the winding insulation under sustained heat and the rotor bell after hard landings.