Cobra C2208/20 Motor Propeller Data
	Motor Wind		Motor Kv		No-Load Current		Motor Resistance		I Max	P Max (3S)
	20-Turn Delta		2000 RPM/Volt		Io = 0.80 Amps @ 8v		Rm = 0.064 Ohms		18 Amps	200 W
	Outside Diameter		Body Length		Total Shaft Length		Shaft Diameter		Motor Weight
	27.7 mm,  1.09 in.		24.0 mm,  0.94 in.		38.0 mm,  1.50 in.		3.17 mm,  0.125 in.		46.5 gm,   1.64 oz
	Prop	Prop	Input	Motor	Watts	Prop	Pitch	Thrust	Thrust	Thrust Eff.
	Manf.	Size	Voltage	Amps	Input	RPM	Speed	Grams	Ounces	Grams/W
	APC	6x4-E	7.4	8.70	64.4	12,430	47.1	329	11.61	5.11
	APC	6x5.5-E	7.4	10.61	78.5	11,900	62.0	328	11.57	4.18
	APC	7x4-E	7.4	12.87	95.2	11,300	42.8	519	18.31	5.45
	APC	7x5-E	7.4	15.49	114.6	10,600	50.2	498	17.57	4.34
	APC	7x6-E	7.4	16.14	119.4	10,460	59.4	535	18.87	4.48
	APC	8x4-E	7.4	17.38	128.6	10,100	38.3	638	22.50	4.96
	APC	8x6-E	7.4	22.31	165.1	8,790	49.9	649	22.89	3.93
	APC	9x4.5-E	7.4	21.86	161.8	8,870	37.8	790	27.87	4.88
	APC	9x6-E	7.4	23.95	177.2	8,270	47.0	785	27.69	4.43
	Prop	Prop	Input	Motor	Watts	Prop	Pitch	Thrust	Thrust	Thrust Eff.
	Manf.	Size	Voltage	Amps	Input	RPM	Speed	Grams	Ounces	Grams/W
	APC	4.1x4.1-E	11.1	6.67	74.0	19,830	77.0	223	7.87	3.01
	APC	4.5x4.1-E	11.1	8.12	90.1	19,370	75.2	301	10.62	3.34
	APC	4.7x4.25-E	11.1	9.85	109.3	18,830	75.8	323	11.39	2.95
	APC	4.75x4.75-E	11.1	10.99	122.0	18,510	83.3	316	11.15	2.59
	APC	4.75x5.5-E	11.1	12.41	137.8	18,030	93.9	296	10.44	2.15
	APC	5x5-E	11.1	12.61	140.0	17,970	85.1	330	11.64	2.36
	APC	5.25x4.75-E	11.1	13.95	154.8	17,580	79.1	461	16.26	2.98
	APC	5.5x4.5-E	11.1	14.48	160.7	17,410	74.2	471	16.61	2.93
	APC	6x4-E	11.1	15.83	175.7	17,020	64.5	644	22.72	3.67
	APC	6x5.5-E	11.1	19.60	217.6	15,880	82.7	570	20.11	2.62
	APC	7x4-E	11.1	23.28	258.4	14,770	55.9	974	34.36	3.77
	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.