Radio Control (RC) Airplanes, Helicopters,components-Motors & ESCs

Outrunner Brushless Motor A/R4120

Use this motor with 4-6 cell Li-Poly packs and 11-13 inch props on planes up to 8 lbs flying weight. We suggest
propping for around 800 watts continuous. Manufacturer suggests a 12 x 8 prop on 5 cells or 13 x 11 on 4 cells.

Similar to AXI Gold 4120/14, Welgard C5055-06, E-Flite Power 46. Roughly equivalent to .46 2-stroke or .65 4-stroke
glow engines.

Recomended model weight:2000 - 3500g/4.4-7.7 lb.
Recomended prop without gearbox:12 cells 13"x11", 14 cells 13"x8", 16 cells (5s Li-Poly) 12"x8"

Specificaton

No. Of cells

RPM/V

Max. efficiency current

NoLoad current / 10 V

Current capacity

Ni-MH

Li-Poly

A4120/6

9-12

4-6

710 KV

26 - 45 A (>81%)

2.6 A

60 A / 60s

R4120/6 9-12 4-6 640 KV 25 - 50 A (>84%) 3.2 A 70A /60s

A4120/7

9-12

4-6

610 KV

20 - 40 A (>81%)

2.0 A

55 A / 60S

Max. efficiency

Shaft diameter (mm)

Weight with cables

Internal Resistance

Dimensions (mm)

A4120/6

84%

6 mm

309 g 10.90 oz.

33 mohms

50 x 55

U4120/6 90% 6 mm 280g/9.88 oz. 15 mohms 50 X45

A4120/7

85%

6 mm

309 g/ 10.90 oz

41 mohms

50x55

Recomended model weight Recomended prop without gearbox

R4120/6 2000 - 3500g 4.5 -8.0 lbs 12 cells 13"x11" 14 cells 13"x8" 16 cells (5s Li) 12"x8"

A4120/7 Datasheet

Propeller: Volts (V): Amps (A): Thrust (g/oz): Power (W):

APC 12 x 6 E 18.9 V 31.5 A 2.38 kg / 85.1 oz 595 W

APC 13 x 10 E 14.9 V 39.4 A 1.75 kg / 62.4 oz 587 W

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	No. Of cells		RPM/V	Max. efficiency current	NoLoad current / 10 V	Current capacity
	Ni-MH	Li-Poly	RPM/V	Max. efficiency current	NoLoad current / 10 V	Current capacity
A4120/6	9-12	4-6	710 KV	26 - 45 A (>81%)	2.6 A	60 A / 60s
R4120/6	9-12	4-6	640 KV	25 - 50 A (>84%)	3.2 A	70A /60s
A4120/7	9-12	4-6	610 KV	20 - 40 A (>81%)	2.0 A	55 A / 60S

	Max. efficiency	Shaft diameter (mm)	Weight with cables	Internal Resistance	Dimensions (mm)

A4120/6	84%	6 mm	309 g 10.90 oz.	33 mohms	50 x 55

U4120/6	90%	6 mm	280g/9.88 oz.	15 mohms	50 X45
A4120/7	85%	6 mm	309 g/ 10.90 oz	41 mohms	50x55

	Recomended model weight	Recomended prop without gearbox
R4120/6	2000 - 3500g 4.5 -8.0 lbs	12 cells 13"x11"	14 cells 13"x8"	16 cells (5s Li) 12"x8"

Propeller:	Volts (V):	Amps (A):	Thrust (g/oz):	Power (W):
APC 12 x 6 E	18.9 V	31.5 A	2.38 kg / 85.1 oz	595 W
APC 13 x 10 E	14.9 V	39.4 A	1.75 kg / 62.4 oz	587 W