Cobra C4120/14 Motor Propeller Data
	Motor Wind		Motor Kv		No-Load Current		Motor Resistance		I Max	P Max (5S)
	14-Turn Delta		710 RPM/Volt		Io = 1.99 Amps @ 14v		Rm = 0.018 Ohms		68 Amps	1260 W
	Outside Diameter		Body Length		Total Shaft Length		Shaft Diameter		Motor Weight
	49.8 mm,  1.96 in.		51.8 mm,  2.04 in.		74.5 mm,  2.93 in.		6.00 mm,  0.236 in.		293 gm,   10.34 oz
	Prop	Prop	Input	Motor	Watts	Prop	Pitch	Thrust	Thrust	Thrust Eff.
	Manf.	Size	Voltage	Amps	Input	RPM	Speed	Grams	Ounces	Grams/W
	APC	11x8-E	14.8	32.83	485.8	9,085	68.8	2035	71.78	4.19
	APC	11x8.5-E	14.8	36.00	532.8	8,964	72.2	2080	73.37	3.90
	APC	11x10-E	14.8	42.00	621.5	8,769	83.0	1898	66.95	3.05
	APC	12x6-E	14.8	34.03	503.7	9,039	51.4	2524	89.03	5.01
	APC	12x8-E	14.8	42.55	629.8	8,746	66.3	2286	80.64	3.63
	APC	12x10-E	14.8	49.68	735.3	8,361	79.2	2393	84.41	3.25
	APC	12x12-E	14.8	54.63	808.5	8,194	93.1	2220	78.31	2.75
	APC	13x6.5-E	14.8	47.49	702.8	8,592	52.9	3134	110.55	4.46
	APC	13x8-E	14.8	51.44	761.3	8,438	63.9	3073	108.40	4.04
	APC	13x10-E	14.8	68.02	1006.7	7,919	75.0	2816	99.33	2.80
	APC	14x7-E	14.8	59.41	879.3	8,195	54.3	3619	127.66	4.12
	APC	14x8.5-E	14.8	60.90	901.3	8,133	65.5	3701	130.55	4.11
	APC	14x10-E	14.8	61.23	906.2	8,128	77.0	3571	125.96	3.94
	APC	14x12-E	14.8	85.57	1266.4	7,322	83.2	2904	102.43	2.29
	APC	15x4-E	14.8	47.08	696.7	8,608	32.6	3713	130.97	5.33
	APC	15x6-E	14.8	61.49	910.0	8,121	46.1	4154	146.53	4.56
	APC	15x8-E	14.8	64.07	948.3	8,039	60.9	4041	142.54	4.26
	MAS	11x7x3	14.8	32.19	476.3	9,116	60.4	2287	80.67	4.80
	MAS	11x8x3	14.8	35.21	521.1	8,999	68.2	2388	84.23	4.58
	MAS	12x6x3	14.8	36.33	537.6	8,958	50.9	2638	93.05	4.91
	MAS	12x8x3	14.8	51.30	759.2	8,456	64.1	3341	117.85	4.40
	MAS	13x8x3	14.8	56.42	835.0	8,293	62.8	3653	128.85	4.37
	MAS	14x7x3	14.8	65.22	965.3	8,002	53.0	4215	148.68	4.37
	Prop	Prop	Input	Motor	Watts	Prop	Pitch	Thrust	Thrust	Thrust Eff.
	Manf.	Size	Voltage	Amps	Input	RPM	Speed	Grams	Ounces	Grams/W
	APC	9x7.5-E	18.5	33.66	622.6	11,449	81.3	1733	61.13	2.78
	APC	9x9-E	18.5	37.80	699.2	11,290	96.2	1753	61.83	2.51
	APC	10x6-E	18.5	29.06	537.6	11,622	66.0	2096	73.93	3.90
	APC	10x7-E	18.5	34.79	643.6	11,381	75.4	2211	77.99	3.44
	APC	10x10-E	18.5	49.16	909.4	10,704	101.4	2032	71.68	2.23
	APC	11x5.5-E	18.5	38.25	707.6	11,287	58.8	2935	103.53	4.15
	APC	11x7-E	18.5	46.06	852.1	10,984	72.8	3094	109.14	3.63
	APC	11x8-E	18.5	50.76	939.1	10,810	81.9	2880	101.59	3.07
	APC	11x8.5-E	18.5	54.83	1014.3	10,669	85.9	2959	104.37	2.92
	APC	11x10-E	18.5	61.96	1146.3	10,426	98.7	2725	96.12	2.38
	APC	12x6-E	18.5	52.51	971.4	10,745	61.1	3718	131.15	3.83
	APC	12x8-E	18.5	62.90	1163.6	10,385	78.7	3316	116.97	2.85
	APC	13x4-E	18.5	43.30	801.0	11,098	42.0	3706	130.72	4.63
	APC	13x6.5-E	18.5	73.05	1351.3	10,046	61.8	4263	150.37	3.15
	MAS	9x7x3	18.5	28.83	533.3	11,642	77.2	2147	75.73	4.03
	MAS	10x5x3	18.5	25.63	474.1	11,778	55.8	2168	76.47	4.57
	MAS	10x7x3	18.5	37.88	700.7	11,292	74.9	2810	99.12	4.01
	MAS	11x7x3	18.5	46.29	856.4	10,980	72.8	3342	117.88	3.90
	MAS	11x8x3	18.5	50.77	939.2	10,813	81.9	3428	120.92	3.65
	MAS	12x6x3	18.5	52.14	964.6	10,762	61.1	3884	137.00	4.03
	MAS	12x8x3	18.5	72.48	1341.0	10,060	76.2	4748	167.48	3.54
	Prop	Prop	Input	Motor	Watts	Prop	Pitch	Thrust	Thrust	Thrust Eff.
	Manf.	Size	Voltage	Amps	Input	RPM	Speed	Grams	Ounces	Grams/W
	APC	9x7.5-E	22.2	46.52	1032.7	13,101	93.0	2300	81.13	2.23
	APC	9x9-E	22.2	52.37	1162.6	13,071	111.4	2378	83.88	2.05
	APC	10x5-E	22.2	37.33	828.7	13,673	64.7	2708	95.52	3.27
	APC	10x6-E	22.2	41.21	914.8	13,505	76.7	2831	99.86	3.09
	APC	10x7-E	22.2	47.09	1045.3	13,083	86.7	2938	103.63	2.81
	APC	10x10-E	22.2	68.74	1526.0	12,434	117.7	2698	95.17	1.77
	APC	11x5.5-E	22.2	55.31	1227.8	12,955	67.5	3910	137.92	3.18
	APC	11x7-E	22.2	66.28	1471.4	12,559	83.3	3946	139.19	2.68
	APC	11x8-E	22.2	71.71	1591.9	12,338	93.5	3776	133.19	2.37
	APC	12x6-E	22.2	72.94	1619.3	12,089	68.7	4669	164.69	2.88
	APC	13x4-E	22.2	61.74	1370.6	12,699	48.1	5082	179.26	3.71
	MAS	9x7x3	22.2	38.91	863.9	13,610	90.2	2993	105.57	3.46
	MAS	10x5x3	22.2	33.64	746.7	13,622	64.5	2970	104.76	3.98
	MAS	10x7x3	22.2	51.10	1134.5	13,126	87.0	3843	135.56	3.39
	MAS	11x7x3	22.2	61.96	1375.6	12,697	84.2	4522	159.51	3.29
	MAS	11x8x3	22.2	69.19	1535.9	12,454	94.3	4471	157.71	2.91
	MAS	12x6x3	22.2	70.16	1557.5	12,398	70.4	5198	183.35	3.34
	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.