Cobra C2217/20 Motor Propeller Data
	Motor Wind		Motor Kv		No-Load Current		Motor Resistance		I Max	P Max (3S)
	20-Turn Delta		960 RPM/Volt		Io = 0.55 Amps @ 8v		Rm = 0.110 Ohms		20 Amps	220 W
	Outside Diameter		Body Length		Total Shaft Length		Shaft Diameter		Motor Weight
	27.7 mm,  1.09 in.		33.0 mm,  1.30 in.		47.0 mm,  1.85 in.		3.17 mm,  0.125 in.		72.0 gm,   2.54 oz
	Prop	Prop	Input	Motor	Watts	Prop	Pitch	Thrust	Thrust	Thrust Eff.
	Manf.	Size	Voltage	Amps	Input	RPM	Speed	Grams	Ounces	Grams/W
	APC	9x6-SF	7.4	8.37	61.9	5,326	30.3	459	16.19	7.41
	APC	9x7.5-SF	7.4	9.66	71.5	5,110	36.3	453	15.98	6.34
	APC	10x3.8-SF	7.4	7.61	56.3	5,450	19.6	494	17.43	8.77
	APC	10x4.7-SF	7.4	8.45	62.5	5,320	23.7	534	18.84	8.54
	APC	10x7-SF	7.4	11.04	81.7	4,900	32.5	572	20.18	7.00
	APC	11x3.8-SF	7.4	8.45	62.5	5,300	19.1	556	19.61	8.89
	APC	11x4.7-SF	7.4	10.35	76.6	5,000	22.3	634	22.36	8.28
	APC	11x7-SF	7.4	13.44	99.5	4,520	30.0	690	24.34	6.94
	APC	12x3.8-SF	7.4	11.71	86.7	4,780	17.2	697	24.59	8.04
	APC	12x6-E	7.4	10.62	78.6	4,970	28.2	672	23.70	8.55
	APC	12x6-SF	7.4	14.77	109.3	4,270	24.3	775	27.34	7.09
	APC	12x8-E	7.4	13.05	96.6	4,590	34.8	606	21.38	6.28
	APC	12x8-SF	7.4	16.45	121.7	3,950	29.9	753	26.56	6.19
	APC	13x4.7-SF	7.4	14.45	106.9	4,310	19.2	791	27.90	7.40
	APC	13x6.5-E	7.4	13.40	99.2	4,520	27.8	771	27.20	7.78
	APC	13x8-E	7.4	14.47	107.1	4,340	32.9	762	26.88	7.12
	APC	14x7-E	7.4	15.28	113.1	4,210	27.9	841	29.67	7.44
	Prop	Prop	Input	Motor	Watts	Prop	Pitch	Thrust	Thrust	Thrust Eff.
	Manf.	Size	Voltage	Amps	Input	RPM	Speed	Grams	Ounces	Grams/W
	APC	9x3.8-SF	11.1	9.88	109.7	8,160	29.4	737	26.00	6.72
	APC	9x4.7-SF	11.1	9.93	110.2	8,140	36.2	743	26.21	6.74
	APC	9x6-SF	11.1	15.80	175.4	7,020	39.9	835	29.45	4.76
	APC	9x7.5-E	11.1	17.59	195.2	6,680	47.4	786	27.73	4.03
	APC	10x3.8-SF	11.1	14.63	162.4	7,250	26.1	978	34.50	6.02
	APC	10x4.7-SF	11.1	15.60	173.2	7,060	31.4	997	35.17	5.76
	APC	10x5-E	11.1	12.13	134.6	7,720	36.6	871	30.72	6.47
	APC	10x6-E	11.1	13.17	146.2	7,550	42.9	906	31.96	6.20
	APC	10x7-E	11.1	14.75	163.7	7,240	48.0	916	32.31	5.59
	APC	11x3.8-SF	11.1	15.79	175.3	6,990	25.2	1060	37.39	6.05
	APC	11x4.7-SF	11.1	18.31	203.2	6,500	28.9	1142	40.28	5.62
	APC	11x5.5-E	11.1	15.56	172.7	7,090	36.9	1052	37.11	6.09
	APC	11x7-E	11.1	17.51	194.4	6,690	44.3	1056	37.25	5.43
	APC	11x8-E	11.1	18.46	204.9	6,480	49.1	1040	36.68	5.08
	APC	11x8.5-E	11.1	19.25	213.7	6,260	47.4	994	35.06	4.65
	APC	12x3.8-SF	11.1	20.36	226.0	6,000	21.6	1207	42.58	5.34
	APC	12x6-E	11.1	18.46	204.9	6,450	36.6	1189	41.94	5.80
	APC	13x4-E	11.1	16.95	188.1	6,790	25.7	1223	43.14	6.50
	GWS	9x5x3-DD	11.1	10.97	121.8	7,940	37.6	778	27.44	6.39
	GWS	10x6-DD	11.1	11.71	130.0	7,830	44.5	845	29.81	6.50
	GWS	10x6x3-DD	11.1	14.57	161.7	7,234	41.1	969	34.18	5.99
	GWS	10x8-HD	11.1	17.29	191.9	6,724	38.2	818	28.85	4.26
	GWS	11x7-DD	11.1	16.39	181.9	6,910	45.8	1077	37.99	5.92
	Prop	Prop	Input	Motor	Watts	Prop	Pitch	Thrust	Thrust	Thrust Eff.
	Manf.	Size	Voltage	Amps	Input	RPM	Speed	Grams	Ounces	Grams/W
	APC	7x5-E	14.8	8.80	130.2	11,460	54.3	602	21.23	4.62
	APC	7x6-E	14.8	9.29	137.5	11,360	64.5	658	23.21	4.79
	APC	8x4-E	14.8	10.30	152.4	11,150	42.2	819	28.89	5.37
	APC	8x6-E	14.8	14.64	216.7	10,240	58.2	920	32.45	4.25
	APC	8x8-E	14.8	18.43	272.8	9,470	71.7	795	28.04	2.91
	APC	9x4.5-E	14.8	14.22	210.5	10,310	43.9	1112	39.22	5.28
	APC	9x6-E	14.8	16.25	240.5	9,900	56.3	1158	40.85	4.81
	APC	9x7.5-E	14.8	20.64	305.5	8,860	62.9	1135	40.04	3.72
	APC	10x5-E	14.8	18.13	268.3	9,370	44.4	1303	45.96	4.86
	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.