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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›Cobra 4130/20 300Kv

Cobra 4130/20 300Kv

The Cobra 4130/20 300Kv is a 300 kv motor with a 41 × 30 mm stator, weighing 396 g and rated to 52 A.

Simulate this motor

Specifications

Identity

BrandCobra
ModelCobra 4130/20 300Kv
kv300

Electrical

Max A52
Phase resistance46 mΩ
Poles14
Maker cells—
Curve pack10S

Mechanical

Weight0.87 lb
Stator41×30
Stator length30 mm

Limits

Max power—
MotorCobra 4130/20 300KvThis page
Propeller13x7
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 %3,6650.72 lb34 W0.866.29.57
40 %4,7971.24 lb67 W1.675.28.48
50 %5,9001.90 lb115 W2.880.67.49
60 %6,9632.67 lb182 W4.483.96.67
70 %7,9753.54 lb267 W6.685.96
80 %8,9254.46 lb371 W9.3875.46
90 %9,8035.42 lb490 W12.587.65.02
100 %10,2976.01 lb569 W14.787.74.79

Related

Other winds

  • Cobra 4130/20 390Kv

Paired with

  • 10x6-4
  • 12x6EP(F2B)
  • 13x7
  • 15x10E
  • MaxAmps 1300mAh 10S

Same class

  • AXI 2808/24 CYCLONE 1190kV
  • AXI 2814/16 CYCLONE 1035kV
  • AXI 2814/20 CYCLONE 840kV
  • AXI 2820/12 CYCLONE 990kV
  • AXI 2820/14 CYCLONE 860kV
  • AXI 2826/10 CYCLONE 920kV
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.