Cobra C3520/12 Motor Propeller Data
	Motor Wind		Motor Kv		No-Load Current		Motor Resistance		I Max	P Max (4S)
	12-Turn Delta		820 RPM/Volt		Io = 1.45 Amps @ 14v		Rm = 0.026 Ohms		56 Amps	830 W
	Outside Diameter		Body Length		Total Shaft Length		Shaft Diameter		Motor Weight
	43.0 mm,  1.69 in.		46.0 mm,  1.81 in.		68.0 mm,  2.68 in.		5.00 mm,  0.197 in.		216 gm,   7.62 oz
	Prop	Prop	Input	Motor	Watts	Prop	Pitch	Thrust	Thrust	Thrust Eff.
	Manf.	Size	Voltage	Amps	Input	RPM	Speed	Grams	Ounces	Grams/W
	APC	11x8.5-E	11.1	24.93	276.8	7,375	59.4	1362	48.04	4.92
	APC	11x10-E	11.1	29.98	332.8	7,169	67.9	1256	44.30	3.77
	APC	12x6-E	11.1	23.97	266.0	7,496	42.6	1630	57.50	6.13
	APC	12x8-E	11.1	29.94	332.3	7,172	54.3	1481	52.24	4.46
	APC	12x10-E	11.1	34.65	384.6	6,918	65.5	1610	56.79	4.19
	APC	12x12-E	11.1	40.31	447.4	6,652	75.6	1419	50.05	3.17
	APC	13x6.5-E	11.1	32.36	359.2	7,049	43.4	2005	70.72	5.58
	APC	13x8-E	11.1	34.78	386.0	6,914	52.4	1997	70.44	5.17
	APC	13x10-E	11.1	44.71	496.2	6,404	60.6	1772	62.50	3.57
	APC	14x7-E	11.1	38.49	427.3	6,661	44.2	2298	81.06	5.38
	APC	14x8.5-E	11.1	41.36	459.1	6,588	53.0	2387	84.20	5.20
	APC	14x10-E	11.1	41.22	457.6	6,596	62.5	2335	82.36	5.10
	APC	14x12-E	11.1	57.16	634.5	5,868	66.7	1847	65.15	2.91
	APC	15x4-E	11.1	32.07	356.0	7,056	26.7	2331	82.22	6.55
	APC	15x6-E	11.1	40.78	452.6	6,619	37.6	2587	91.25	5.72
	APC	15x8-E	11.1	43.17	479.2	6,481	49.1	2572	90.72	5.37
	APC	15x10-E	11.1	56.25	624.4	5,875	55.6	2628	92.70	4.21
	MAS	12x6x3	11.1	26.29	291.8	7,302	41.5	1704	60.11	5.84
	MAS	12x8x3	11.1	36.23	402.2	6,841	51.8	2094	73.86	5.21
	MAS	13x8x3	11.1	39.80	441.8	6,670	50.5	2298	81.06	5.20
	MAS	14x7x3	11.1	45.21	501.9	6,386	42.3	2598	91.64	5.18
	MAS	14x9x3	11.1	52.32	580.8	6,042	51.5	2794	98.55	4.81
	MAS	15x7x3	11.1	52.89	587.1	5,928	39.3	2876	101.45	4.90
	MAS	16x8x3	11.1	59.69	662.6	5,654	42.8	3160	111.46	4.77
	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	14.8	26.62	393.9	9,935	70.6	1287	45.40	3.27
	APC	9x9-E	14.8	30.29	448.3	9,778	83.3	1306	46.07	2.91
	APC	10x7-E	14.8	27.47	406.5	9,966	66.1	1661	58.59	4.09
	APC	10x10-E	14.8	39.84	589.7	9,226	87.4	1492	52.63	2.53
	APC	11x5.5-E	14.8	29.58	437.8	9,822	51.2	2125	74.96	4.85
	APC	11x7-E	14.8	34.90	516.5	9,508	63.0	2237	78.91	4.33
	APC	11x8-E	14.8	37.92	561.3	9,346	70.8	2120	74.78	3.78
	APC	11x8.5-E	14.8	40.83	604.2	9,178	73.9	2154	75.98	3.56
	APC	11x10-E	14.8	46.37	686.2	8,853	83.8	1922	67.80	2.80
	APC	12x6-E	14.8	38.95	576.5	9,286	52.8	2651	93.51	4.60
	APC	12x8-E	14.8	46.60	689.7	8,842	67.0	2302	81.20	3.34
	APC	12x10-E	14.8	55.03	814.4	8,391	79.5	2369	83.56	2.91
	APC	12x12-E	14.8	59.91	886.7	8,140	92.5	2157	76.09	2.43
	APC	13x4-E	14.8	33.25	492.1	9,612	36.4	2631	92.80	5.35
	APC	13x6.5-E	14.8	51.44	761.3	8,600	52.9	3074	108.43	4.04
	APC	13x8-E	14.8	54.21	802.3	8,341	63.2	2942	103.77	3.67
	APC	14x7-E	14.8	61.97	917.2	8,039	53.3	3420	120.64	3.73
	APC	15x4-E	14.8	51.13	756.7	8,602	32.6	3665	129.28	4.84
	MAS	9x7x3	14.8	23.69	350.6	10,187	67.5	1603	56.54	4.57
	MAS	10x5x3	14.8	21.45	317.4	10,370	49.1	1642	57.92	5.17
	MAS	10x7x3	14.8	30.76	455.2	9,768	64.8	2063	72.77	4.53
	MAS	11x7x3	14.8	36.80	544.6	9,399	62.3	2423	85.47	4.45
	MAS	11x8x3	14.8	39.64	586.7	9,240	70.0	2476	87.34	4.22
	MAS	12x6x3	14.8	40.83	604.3	9,183	52.2	2746	96.86	4.54
	MAS	12x8x3	14.8	54.51	806.7	8,432	63.9	3231	113.97	4.01
	MAS	13x8x3	14.8	59.34	878.3	8,152	61.8	3472	122.47	3.95
	Prop	Prop	Input	Motor	Watts	Prop	Pitch	Thrust	Thrust	Thrust Eff.
	Manf.	Size	Voltage	Amps	Input	RPM	Speed	Grams	Ounces	Grams/W
	APC	9x6-E	18.5	25.56	472.9	12,725	72.3	1744	61.52	3.69
	APC	9x7.5-E	18.5	39.42	729.3	11,794	83.8	1824	64.34	2.50
	APC	9x9-E	18.5	43.66	807.6	11,549	98.4	1858	65.54	2.30
	APC	10x5-E	18.5	30.57	565.5	12,290	58.2	2160	76.19	3.82
	APC	10x6-E	18.5	34.44	637.1	12,110	68.8	2225	78.48	3.49
	APC	10x7-E	18.5	40.13	742.4	11,756	77.9	2331	82.22	3.14
	APC	10x10-E	18.5	55.48	1026.3	10,822	102.5	2049	72.28	2.00
	APC	11x5.5-E	18.5	43.71	808.7	11,542	60.1	3071	108.33	3.80
	APC	11x7-E	18.5	50.98	943.1	11,096	73.6	3119	110.02	3.31
	APC	11x8-E	18.5	55.55	1027.7	10,817	81.9	2873	101.34	2.80
	APC	11x8.5-E	18.5	58.26	1077.8	10,547	84.9	2841	100.21	2.64
	APC	12x6-E	18.5	56.95	1053.5	10,742	61.0	3667	129.35	3.48
	APC	13x4-E	18.5	48.49	897.1	11,226	42.5	3810	134.39	4.25
	MAS	8x6x3	18.5	21.52	398.0	13,029	74.0	1600	56.44	4.02
	MAS	9x7x3	18.5	33.25	615.0	12,085	80.1	2333	82.29	3.79
	MAS	10x5x3	18.5	30.16	558.0	12,388	58.7	2412	85.08	4.32
	MAS	10x7x3	18.5	42.36	783.6	11,516	76.3	2900	102.29	3.70
	MAS	11x7x3	18.5	50.80	939.8	11,091	73.5	3366	118.73	3.58
	MAS	11x8x3	18.5	54.45	1007.3	10,772	81.6	3364	118.66	3.34
	MAS	12x6x3	18.5	56.42	1043.7	10,739	61.0	3815	134.57	3.66
	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.