Cobra C4130/20 Motor Propeller Data
	Motor Wind		Motor Kv		No-Load Current		Motor Resistance		I Max	P Max (6S)
	20-Turn Delta		300 RPM/Volt		Io = 0.77 Amps @ 20v		Rm = 0.046 Ohms		52 Amps	1150 W
	Outside Diameter		Body Length		Total Shaft Length		Shaft Diameter		Motor Weight
	49.8 mm,  1.96 in.		61.8 mm,  2.43 in.		84.5 mm,  3.33 in.		6.00 mm,  0.236 in.		396 gm,   13.97 oz
	Prop	Prop	Input	Motor	Watts	Prop	Pitch	Thrust	Thrust	Thrust Eff.
	Manf.	Size	Voltage	Amps	Input	RPM	Speed	Grams	Ounces	Grams/W
	APC	16x10-E	22.2	25.11	557.4	5,654	53.5	3113	109.81	5.58
	APC	16x12-E	22.2	31.51	699.5	5,426	61.7	2631	92.80	3.76
	APC	17x8-E	22.2	24.94	553.7	5,662	42.9	3399	119.89	6.14
	APC	17x10-E	22.2	30.12	668.7	5,474	51.8	3493	123.21	5.22
	APC	17x12-E	22.2	33.84	751.2	5,344	60.7	3424	120.78	4.56
	APC	18x8-E	22.2	25.98	576.8	5,622	42.6	3772	133.05	6.54
	APC	18x10-E	22.2	30.62	679.9	5,459	51.7	4001	141.13	5.89
	APC	18x12-E	22.2	42.43	941.8	5,053	57.4	3785	133.51	4.02
	APC	19x8-E	22.2	35.28	783.3	5,294	40.1	4556	160.71	5.82
	APC	19x10-E	22.2	34.70	770.3	5,317	50.4	4576	161.41	5.94
	APC	19x12-E	22.2	40.42	897.3	5,126	58.3	4866	171.64	5.42
	APC	20x8-E	22.2	37.37	829.5	5,228	39.6	5046	177.99	6.08
	APC	20x10-E	22.2	41.52	921.7	5,021	47.5	5227	184.38	5.67
	APC	20x11-E	22.2	45.11	1001.5	4,973	51.8	5233	184.59	5.23
	APC	20x13-E	22.2	46.25	1026.8	4,836	59.5	5294	186.74	5.16
	APC	20x15-E	22.2	58.00	1287.5	4,533	64.4	4558	160.78	3.54
	APC	21x12W-E	22.2	54.50	1210.0	4,679	53.2	6062	213.83	5.01
	APC	21x14-E	22.2	51.27	1138.3	4,733	62.7	5887	207.66	5.17
	APC	22x10-E	22.2	52.60	1167.7	4,703	44.5	6362	224.41	5.45
	MAS	16x8x3	22.2	23.37	518.8	5,719	43.3	3256	114.85	6.28
	MAS	16x10x3	22.2	29.07	645.2	5,415	51.3	3744	132.06	5.80
	Prop	Prop	Input	Motor	Watts	Prop	Pitch	Thrust	Thrust	Thrust Eff.
	Manf.	Size	Voltage	Amps	Input	RPM	Speed	Grams	Ounces	Grams/W
	APC	14x10-E	29.6	22.64	670.1	7,750	73.4	3201	112.91	4.78
	APC	14x12-E	29.6	32.49	961.6	7,318	83.2	3024	106.67	3.14
	APC	15x8-E	29.6	23.63	699.5	7,595	57.5	3726	131.43	5.33
	APC	15x10-E	29.6	34.79	1029.7	7,131	67.5	3928	138.55	3.81
	APC	16x8-E	29.6	38.61	1142.9	7,084	53.7	4633	163.42	4.05
	APC	16x10-E	29.6	42.41	1255.2	6,939	65.7	4616	162.82	3.68
	APC	16x12-E	29.6	48.86	1446.2	6,694	76.1	4007	141.34	2.77
	APC	17x8-E	29.6	40.91	1210.9	6,994	53.0	5364	189.21	4.43
	APC	17x10-E	29.6	47.94	1419.0	6,704	63.5	5524	194.85	3.89
	APC	17x12-E	29.6	53.50	1583.6	6,549	74.4	5091	179.58	3.21
	APC	18x8-E	29.6	40.74	1205.9	7,004	53.1	6021	212.38	4.99
	APC	18x10-E	29.6	48.04	1422.1	6,768	64.1	6279	221.48	4.42
	APC	19x8-E	29.6	56.51	1672.6	6,400	48.5	6860	241.98	4.10
	MAS	13x8x3	29.6	21.22	628.1	7,808	59.2	3173	111.92	5.05
	MAS	14x7x3	29.6	25.11	743.3	7,645	50.7	3790	133.69	5.10
	MAS	14x9x3	29.6	29.21	864.7	7,366	62.8	4254	150.05	4.92
	MAS	15x7x3	29.6	30.33	897.7	7,315	48.5	4534	159.93	5.05
	MAS	16x8x3	29.6	35.91	1063.0	7,203	54.6	5212	183.85	4.90
	MAS	16x10x3	29.6	45.68	1352.1	6,824	64.6	5976	210.80	4.42
	Prop	Prop	Input	Motor	Watts	Prop	Pitch	Thrust	Thrust	Thrust Eff.
	Manf.	Size	Voltage	Amps	Input	RPM	Speed	Grams	Ounces	Grams/W
	APC	12x8-E	37.0	23.03	852.3	9,758	73.9	2892	102.01	3.39
	APC	12x10-E	37.0	28.64	1059.8	9,472	89.7	3080	108.64	2.91
	APC	13x6.5-E	37.0	26.34	974.4	9,590	59.0	3922	138.34	4.03
	APC	13x8-E	37.0	28.65	1060.0	9,477	71.8	3869	136.47	3.65
	APC	13x10-E	37.0	38.52	1425.3	8,999	85.2	3671	129.49	2.58
	APC	14x7-E	37.0	33.09	1224.3	9,134	60.5	4558	160.78	3.72
	APC	14x8.5-E	37.0	35.10	1298.6	9,158	73.7	4591	161.94	3.54
	APC	14x10-E	37.0	34.63	1281.3	9,211	87.2	4467	157.57	3.49
	APC	14x12-E	37.0	49.73	1839.9	8,566	97.3	4068	143.49	2.21
	APC	15x4-E	37.0	26.28	972.5	9,594	36.3	4832	170.44	4.97
	APC	15x6-E	37.0	34.45	1274.5	9,063	51.5	5277	186.14	4.14
	APC	15x8-E	37.0	36.37	1345.8	9,121	69.1	5233	184.59	3.89
	APC	15x10-E	37.0	53.62	1984.0	8,389	79.4	5385	189.95	2.71
	MAS	11x8x3	37.0	18.83	696.6	9,984	75.6	3016	106.39	4.33
	MAS	12x6x3	37.0	18.77	694.6	9,867	56.1	3220	113.58	4.64
	MAS	12x8x3	37.0	26.43	977.7	9,452	71.6	4112	145.05	4.21
	MAS	13x8x3	37.0	30.37	1123.7	9,393	71.2	4707	166.03	4.19
	MAS	14x7x3	37.0	35.59	1317.0	9,154	60.7	5498	193.93	4.17
	MAS	14x9x3	37.0	42.48	1571.6	8,846	75.4	6124	216.02	3.90
	MAS	15x7x3	37.0	44.20	1635.2	8,773	58.2	6612	233.23	4.04
	MAS	16x8x3	29.6	50.75	1502.3	8,502	64.4	7422	261.80	4.94
	Propeller Chart Color Code Explanation
		The prop is to small to get good performance from the motor. (Less than 50% power)
		The prop is sized right to get good power from the motor. (50 to 80% power)
		The prop can be used, but full throttle should be kept to short bursts. (80 to 100% power)
		The prop is too big for the motor and should not be used. (Over 100% power)
	PLEASE NOTE:
	The data contained in this prop chart is based on actual measurements taken in a controlled test
	environment.  The test voltages used are based on a properly sized Li-Po battery for the current
	draw of the motor being tested.  If you are using a larger than normal capacity battery, or a very
	high C-Rated battery, your actual voltages will be higher than those shown in this chart, and this
	will result in higer current draw for each prop used.  You should always test your power system
	with a watt meter whenever a prop is used to ensure that you are not exceeding the recommended
	rating of the motor being used.  The prop recommendations in this chart are based on the motor
	receiving adequate cooling throughout its operation.  If your motor is being used inside a cowl, you
	must provide adequate cooling to the motor and make sure that the motor is not getting too hot
	during operation.