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© 2026 Upwash LLC·Patent US 2026/0062150 A1·Engineering aid, not for safety-critical or certification use.

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Motors›T-Motor AT4120-250

T-Motor AT4120-250

The T-Motor AT4120-250 is a 250 kv motor with a 50 × 69 mm stator, weighing 304 g and rated to 45 A.

Simulate this motor

Specifications

Identity

BrandT-Motor
ModelT-Motor AT4120-250
kv250

Electrical

Max A45
Phase resistance76 mΩ
Poles14
Maker cells—
Curve pack10S

Mechanical

Weight0.67 lb
Stator50×69
Stator length69 mm

Limits

Max power—
MotorT-Motor AT4120-250This page
Propeller14x14E
BatteryMaxAmps 1300mAh 10S
Throttle%
Charge%
Rotors
Free · no account needed

Open in the calculator

Performance

Pairings
Download CSV
ThrottleRPMThrust (lb)Power (W)Current (A)Efficiency (%)g/W
30 %3,0450.68 lb40 W145.97.6
40 %3,9851.17 lb73 W1.756.57.29
50 %4,9021.78 lb118 W2.964.46.85
60 %5,7902.51 lb178 W4.370.26.38
70 %6,6423.32 lb254 W6.374.35.93
80 %7,4484.20 lb345 W8.677.15.52
90 %8,2035.12 lb451 W11.578.95.15
100 %8,6305.69 lb522 W13.479.64.94

Related

Same maker

  • T-Motor AM480 KV600
  • T-Motor AM480 KV650
  • T-Motor AM480 KV900
  • T-Motor AM60 KV1550
  • T-Motor AM60 KV1880
  • T-Motor AM670 KV480

Paired with

  • 11x6-4
  • 13x5.5E
  • 14x14E
  • 18x10
  • MaxAmps 1300mAh 10S

Same class

  • AXI 4120/14 GOLD LINE V3 660kV
  • AXI 4120/14 V3 LONG 660kV
  • AXI 4120/18 GOLD LINE V3 515kV
  • AXI 4120/18 V3 LONG 515kV
  • AXI 4120/20 GOLD LINE V3 465kV
  • AXI 4120/20 V3 LONG 465kV
See all
Fast modelComputed 2026-10-03prom-rs/0.6.2Validation

The curves here are the Fast model, which every account and every visitor runs without limit. An account also runs the Full model, which solves a database propeller from its measured blade geometry.

Engineering aid — ThrustLab results are physics-based estimates, not certified data. Always bench-test and independently validate before committing a real build to flight. Not for safety-critical or certification use.