Cobra C3520/18 Motor Propeller Data
	Motor Wind		Motor Kv		No-Load Current		Motor Resistance		I Max	P Max (6S)
	18-Turn Delta		550 RPM/Volt		Io = 0.93 Amps @ 20v		Rm = 0.050 Ohms		36 Amps	800 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	11x10-E	14.8	17.42	257.8	6,706	63.5	1085	38.27	4.21
	APC	12x8-E	14.8	17.33	256.4	6,707	50.8	1288	45.43	5.02
	APC	12x10-E	14.8	20.19	298.9	6,508	61.6	1418	50.02	4.74
	APC	12x12-E	14.8	24.15	357.5	6,257	71.1	1259	44.41	3.52
	APC	13x6.5-E	14.8	18.81	278.3	6,612	40.7	1755	61.91	6.31
	APC	13x8-E	14.8	20.11	297.7	6,471	49.0	1753	61.83	5.89
	APC	13x10-E	14.8	26.56	393.1	6,119	57.9	1596	56.30	4.06
	APC	14x7-E	14.8	22.57	334.1	6,310	41.8	2035	71.78	6.09
	APC	14x8.5-E	14.8	24.48	362.3	6,231	50.2	2122	74.85	5.86
	APC	14x10-E	14.8	24.48	362.3	6,252	59.2	2075	73.19	5.73
	APC	14x12-E	14.8	34.63	512.5	5,628	64.0	1677	59.15	3.27
	APC	15x4-E	14.8	18.42	272.6	6,592	25.0	1986	70.05	7.29
	APC	15x6-E	14.8	24.11	356.8	6,270	35.6	2322	81.91	6.51
	APC	15x8-E	14.8	25.76	381.2	6,153	46.6	2301	81.16	6.04
	APC	15x10-E	14.8	34.32	508.0	5,666	53.7	2445	86.24	4.81
	APC	16x8-E	14.8	35.88	531.0	5,575	42.2	2810	99.12	5.29
	APC	16x10-E	14.8	38.40	568.3	5,370	50.9	2731	96.33	4.81
	MAS	12x6x3	14.8	15.54	229.9	6,837	38.8	1476	52.06	6.42
	MAS	12x8x3	14.8	21.35	316.0	6,395	48.4	1829	64.52	5.79
	MAS	13x8x3	14.8	23.61	349.4	6,300	47.7	2017	71.15	5.77
	MAS	14x7x3	14.8	27.20	402.6	6,091	40.4	2348	82.82	5.83
	MAS	14x9x3	14.8	32.12	475.4	5,804	49.5	2599	91.68	5.47
	MAS	15x7x3	14.8	33.06	489.3	5,740	38.0	2734	96.44	5.59
	MAS	16x8x3	14.8	36.90	546.0	5,475	41.5	2965	104.59	5.43
	Prop	Prop	Input	Motor	Watts	Prop	Pitch	Thrust	Thrust	Thrust Eff.
	Manf.	Size	Voltage	Amps	Input	RPM	Speed	Grams	Ounces	Grams/W
	APC	10x10-E	18.5	21.00	388.5	8,223	77.9	1161	40.95	2.99
	APC	11x7-E	18.5	17.98	332.5	8,447	56.0	1729	60.99	5.20
	APC	11x8-E	18.5	19.45	359.8	8,339	63.2	1676	59.12	4.66
	APC	11x8.5-E	18.5	21.21	392.3	8,198	66.0	1712	60.39	4.36
	APC	11x10-E	18.5	24.57	454.5	7,969	75.5	1544	54.46	3.40
	APC	12x6-E	18.5	20.01	370.2	8,299	47.2	2049	72.28	5.53
	APC	12x8-E	18.5	24.65	455.9	7,963	60.3	1847	65.15	4.05
	APC	12x10-E	18.5	29.10	538.4	7,654	72.5	1970	69.49	3.66
	APC	12x12-E	18.5	33.03	611.0	7,401	84.1	1786	63.00	2.92
	APC	13x4-E	18.5	17.11	316.6	8,517	32.3	2023	71.36	6.39
	APC	13x6.5-E	18.5	26.78	495.4	7,765	47.8	2477	87.37	5.00
	APC	13x8-E	18.5	28.93	535.3	7,624	57.8	2457	86.67	4.59
	APC	13x10-E	18.5	37.78	698.8	7,105	67.3	2209	77.92	3.16
	APC	14x7-E	18.5	33.05	611.4	7,411	49.1	2909	102.61	4.76
	APC	14x8.5-E	18.5	34.24	633.5	7,319	58.9	2962	104.48	4.68
	APC	14x10-E	18.5	34.38	636.0	7,334	69.5	2895	102.12	4.55
	APC	15x4-E	18.5	26.87	497.1	7,823	29.6	2929	103.32	5.89
	APC	15x6-E	18.5	34.30	634.5	7,324	41.6	3258	114.92	5.13
	APC	15x8-E	18.5	36.07	667.4	7,208	54.6	3209	113.19	4.81
	MAS	10x7x3	18.5	16.01	296.2	8,590	56.9	1562	55.10	5.27
	MAS	11x7x3	18.5	19.46	360.0	8,337	55.3	1879	66.28	5.22
	MAS	11x8x3	18.5	20.94	387.3	8,172	61.9	1938	68.36	5.00
	MAS	12x6x3	18.5	21.52	398.1	8,135	46.2	2117	74.67	5.32
	MAS	12x8x3	18.5	29.60	547.7	7,611	57.7	2619	92.38	4.78
	MAS	13x8x3	18.5	32.45	600.3	7,435	56.3	2863	100.99	4.77
	MAS	14x7x3	18.5	37.12	686.7	7,116	47.2	3257	114.89	4.74
	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	18.44	409.4	10,123	71.9	1319	46.53	3.22
	APC	9x9-E	22.2	21.02	466.7	9,969	85.0	1357	47.87	2.91
	APC	10x6-E	22.2	16.05	356.2	10,335	58.7	1643	57.95	4.61
	APC	10x7-E	22.2	18.99	421.7	10,129	67.1	1716	60.53	4.07
	APC	10x10-E	22.2	27.86	618.4	9,439	89.4	1568	55.31	2.54
	APC	11x5.5-E	22.2	20.70	459.5	9,998	52.1	2227	78.55	4.85
	APC	11x7-E	22.2	24.42	542.2	9,703	64.3	2343	82.65	4.32
	APC	11x8-E	22.2	26.51	588.6	9,497	71.9	2175	76.72	3.70
	APC	11x8.5-E	22.2	28.51	632.9	9,347	75.2	2223	78.41	3.51
	APC	11x10-E	22.2	32.83	728.8	9,101	86.2	2032	71.68	2.79
	APC	12x6-E	22.2	27.07	601.0	9,451	53.7	2758	97.28	4.59
	APC	12x8-E	22.2	32.94	731.3	9,097	68.9	2444	86.21	3.34
	APC	12x10-E	22.2	39.43	875.3	8,633	81.8	2522	88.96	2.88
	APC	13x4-E	22.2	23.12	513.4	9,806	37.1	2753	97.11	5.36
	APC	13x6.5-E	22.2	36.80	817.0	8,819	54.3	3272	115.42	4.01
	MAS	10x5x3	22.2	14.64	325.1	10,505	49.7	1691	59.65	5.20
	MAS	10x7x3	22.2	21.13	469.1	9,956	66.0	2135	75.31	4.55
	MAS	11x7x3	22.2	25.20	559.5	9,595	63.6	2494	87.97	4.46
	MAS	11x8x3	22.2	27.59	612.5	9,473	71.8	2594	91.50	4.23
	MAS	12x6x3	22.2	28.43	631.2	9,405	53.4	2889	101.91	4.58
	MAS	12x8x3	22.2	38.54	855.6	8,701	65.9	3435	121.16	4.01
	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.