Cobra CM-2217/26 Motor Propeller Data
	Magnets	Motor Wind		Motor Kv		No-Load Current		Motor Resistance		I Max	P Max (4S)
	14-Pole	26-Turn Delta		695 RPM/Volt		Io = 0.36 Amps @ 12v		Rm = 0.179 Ohms		16 Amps	235 W
	Stator	Outside Diameter		Body Length		Total Shaft Length		Shaft Diameter		Motor Weight
	12-Slot	27.7 mm,  1.091 in.		33.0 mm,  1.299 in.		30.1 mm,  1.185 in.		3.17 mm,  0.125 in.		81.2 gm,   2.86 oz
	Test Data From		Input	10.0 V	12.0 V	14.0V	16.0V	Measured Kv value		Measured Rm Value
	Sample Motor		Io Value	0.33 A	0.36 A	0.39 A	0.43 A	660 RPM/Volt @ 10v		0.179 Ohms
	Prop	Prop	Li-Po	Input	Motor	Input	Prop	Pitch Speed	Thrust	Thrust	Thrust Eff.
	Manf.	Size	Cells	Voltage	Amps	Watts	RPM	in MPH	Grams	Ounces	Grams/W
	APC	11x4.5 MR	3	11.1	7.35	81.6	5,952	25.4	693	24.44	8.49
	APC	12x4.5 MR	3	11.1	9.25	102.7	5,576	23.8	840	29.63	8.18
	APC	14x5.5 MR	3	11.1	13.50	149.9	4,818	25.1	1097	38.70	7.32
	GemFan	11x4.7 MR	3	11.1	8.99	99.8	5,639	25.1	778	27.44	7.80
	GemFan	12x4.5 MR	3	11.1	10.75	119.3	5,300	22.6	819	28.89	6.86
	GemFan	11x4 MR-W	3	11.1	6.81	75.6	6,038	22.9	639	22.54	8.45
	GemFan	12x4 MR-W	3	11.1	8.87	98.5	5,666	21.5	782	27.58	7.94
	GemFan	13x4.5 MR-W	3	11.1	10.64	118.1	5,340	22.8	909	32.06	7.70
	GemFan	14x4.5 MR-W	3	11.1	12.25	136.0	5,075	21.6	1032	36.40	7.59
	GemFan	15x4.5 MR-W	3	11.1	12.84	142.5	4,931	21.0	1061	37.43	7.44
	GemFan	16x4.5 MR-W	3	11.1	16.02	177.8	4,324	18.4	1182	41.69	6.65
	RC-Timer	11x5.5-CF	3	11.1	7.51	83.4	5,919	30.8	641	22.61	7.69
	RC-Timer	12x5.5-CF	3	11.1	10.69	118.7	5,328	27.8	831	29.31	7.00
	RC-Timer	13x5.5-CF	3	11.1	13.02	144.5	4,888	25.5	956	33.72	6.61
	RC-Timer	14x5.5-CF	3	11.1	15.73	174.6	4,300	22.4	1025	36.16	5.87
	RC-Timer	15x5.5-CF	3	11.1	18.38	204.0	3,775	19.7	1109	39.12	5.44
	Prop	Prop	Li-Po	Input	Motor	Input	Prop	Pitch Speed	Thrust	Thrust	Thrust Eff.
	Manf.	Size	Cells	Voltage	Amps	Watts	RPM	in MPH	Grams	Ounces	Grams/W
	APC	10x4.5 MR	4	14.8	9.57	141.6	7,782	33.2	937	33.05	6.62
	APC	11x4.5 MR	4	14.8	11.58	171.4	7,387	31.5	1127	39.75	6.58
	APC	12x4.5 MR	4	14.8	14.11	208.8	6,818	29.1	1295	45.68	6.20
	GemFan	8x4.5 MR	4	14.8	6.83	101.1	8,328	35.5	660	23.28	6.53
	GemFan	9x4.7 MR	4	14.8	7.79	115.3	8,127	36.2	771	27.20	6.69
	GemFan	10x4.5 MR	4	14.8	11.26	166.6	7,434	31.7	1013	35.73	6.08
	GemFan	11x4.7 MR	4	14.8	13.73	203.2	6,930	30.8	1216	42.89	5.98
	GemFan	12x4.5 MR	4	14.8	15.85	234.6	6,423	27.4	1234	43.53	5.26
	GemFan	10x4 MR-W	4	14.8	9.80	145.0	7,722	29.3	926	32.66	6.38
	GemFan	11x4 MR-W	4	14.8	10.50	155.4	7,583	28.7	1034	36.47	6.65
	GemFan	12x4 MR-W	4	14.8	13.22	195.7	7,005	26.5	1218	42.96	6.23
	GemFan	13x4.5 MR-W	4	14.8	15.47	229.0	6,484	27.6	1365	48.15	5.96
	RC-Timer	10x5.5-CF	4	14.8	8.38	124.0	8,009	41.7	821	28.96	6.62
	RC-Timer	11x5.5-CF	4	14.8	11.74	173.8	7,331	38.2	1034	36.47	5.95
	RC-Timer	12x5.5-CF	4	14.8	16.05	237.5	6,386	33.3	1250	44.09	5.26
	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, at an altitude of
	512 feet above sea level.  The test voltages used are based on the standard output of a Li-Po battery under load, which is 3.70 volts
	per cell.  If you are using a battery that is larger in capacity than normal, or has a very high C-rating, then your actual voltages will
	be higher than those shown in the chart, and this will result in a higher current and power value for every prop used.  You should
	always test your actual power system with a watt meter before flying your model to make sure that you are not exceeding the
	recommended current and power ratings of the motor being used.  The prop recommendations in this chart assume that the motor
	receives adequate cooling throughout its operation.  If your motor is being used inside a cowl or fuselage, you must ensure that
	the motor receives sufficient airflow, and does not get too hot during operation.  It is always best to use a prop size that pulls no
	more than 80% of the motors maximum recommended current value to ensure safe operation under all conditions.