Cobra C4120/22 Motor Propeller Data
	Motor Wind		Motor Kv		No-Load Current		Motor Resistance		I Max	P Max (6S)
	22-Turn Delta		430 RPM/Volt		Io = 1.14 Amps @ 20v		Rm = 0.040 Ohms		45 Amps	1000 W
	Outside Diameter		Body Length		Total Shaft Length		Shaft Diameter		Motor Weight
	49.8 mm,  1.96 in.		51.8 mm,  2.04 in.		74.5 mm,  2.93 in.		6.00 mm,  0.236 in.		290 gm,   10.23 oz
	Prop	Prop	Input	Motor	Watts	Prop	Pitch	Thrust	Thrust	Thrust Eff.
	Manf.	Size	Voltage	Amps	Input	RPM	Speed	Grams	Ounces	Grams/W
	APC	14x12-E	14.8	25.09	371.3	5,294	60.2	1492	52.63	4.02
	APC	15x8-E	14.8	17.67	261.6	5,590	42.3	1884	66.46	7.20
	APC	15x10-E	14.8	24.35	360.4	5,323	50.4	2130	75.13	5.91
	APC	16x8-E	14.8	25.86	382.7	5,260	39.8	2473	87.23	6.46
	APC	16x10-E	14.8	28.83	426.7	5,149	48.8	2508	88.47	5.88
	APC	16x12-E	14.8	36.16	535.2	4,890	55.6	2081	73.40	3.89
	APC	17x8-E	14.8	28.63	423.7	5,148	39.0	2736	96.51	6.46
	APC	17x10-E	14.8	34.32	508.0	4,955	46.9	2802	98.84	5.52
	APC	17x12-E	14.8	39.37	582.6	4,763	54.1	2614	92.21	4.49
	APC	18x8-E	14.8	30.27	448.0	5,102	38.7	3065	108.11	6.84
	APC	18x10-E	14.8	35.24	521.5	4,916	46.6	3209	113.19	6.15
	APC	19x8-E	14.8	39.52	584.9	4,752	36.0	3550	125.22	6.07
	APC	19x10-E	14.8	39.59	585.9	4,746	44.9	3559	125.54	6.07
	APC	19x12-E	14.8	45.02	666.3	4,534	51.5	3641	128.43	5.46
	APC	20x8-E	14.8	41.94	620.7	4,650	35.2	3872	136.58	6.24
	MAS	14x7x3	14.8	19.03	281.6	5,531	36.7	1930	68.08	6.85
	MAS	14x9x3	14.8	22.84	338.0	5,383	45.9	2184	77.04	6.46
	MAS	15x7x3	14.8	23.88	353.4	5,335	35.4	2357	83.14	6.67
	MAS	16x8x3	14.8	27.34	404.6	5,204	39.4	2630	92.77	6.50
	MAS	16x10x3	14.8	34.83	515.4	4,936	46.7	3071	108.33	5.96
	Prop	Prop	Input	Motor	Watts	Prop	Pitch	Thrust	Thrust	Thrust Eff.
	Manf.	Size	Voltage	Amps	Input	RPM	Speed	Grams	Ounces	Grams/W
	APC	12x10-E	18.5	19.66	363.7	6,983	66.1	1645	58.03	4.52
	APC	12x12-E	18.5	23.46	434.0	6,822	77.5	1506	53.12	3.47
	APC	13x8-E	18.5	19.76	365.5	6,979	52.9	2038	71.89	5.58
	APC	13x10-E	18.5	27.20	503.1	6,670	63.2	1935	68.25	3.85
	APC	14x7-E	18.5	22.78	421.4	6,849	45.4	2425	85.54	5.76
	APC	14x8.5-E	18.5	24.36	450.6	6,788	54.6	2536	89.45	5.63
	APC	14x10-E	18.5	24.20	447.6	6,790	64.3	2466	86.98	5.51
	APC	14x12-E	18.5	36.48	674.9	6,302	71.6	2121	74.82	3.14
	APC	15x6-E	18.5	24.09	445.6	6,797	38.6	2755	97.18	6.18
	APC	15x8-E	18.5	25.76	476.5	6,723	50.9	2773	97.81	5.82
	APC	15x10-E	18.5	36.35	672.4	6,303	59.7	2999	105.79	4.46
	APC	16x8-E	18.5	38.87	719.0	6,202	47.0	3584	126.42	4.98
	APC	16x10-E	18.5	42.65	789.1	6,055	57.3	3570	125.93	4.52
	APC	17x8-E	18.5	42.10	778.8	6,073	46.0	3905	137.74	5.01
	APC	17x10-E	18.5	49.55	916.6	5,746	54.4	3821	134.78	4.17
	APC	18x8-E	18.5	42.89	793.5	6,013	45.6	4339	153.05	5.47
	MAS	12x8x3	18.5	20.19	373.5	6,859	52.0	2134	75.27	5.71
	MAS	13x8x3	18.5	23.15	428.3	6,835	51.8	2413	85.12	5.63
	MAS	14x7x3	18.5	27.22	503.6	6,673	44.2	2854	100.67	5.67
	MAS	14x9x3	18.5	32.52	601.7	6,454	55.0	3208	113.16	5.33
	MAS	15x7x3	18.5	33.81	625.4	6,392	42.4	3412	120.35	5.46
	MAS	16x8x3	18.5	38.73	716.4	6,191	46.9	3828	135.03	5.34
	MAS	16x10x3	18.5	48.47	896.6	5,795	54.9	4265	150.44	4.76
	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	22.2	18.33	406.9	8,376	67.4	1785	62.96	4.39
	APC	11x10-E	22.2	22.63	502.4	8,302	78.6	1685	59.44	3.35
	APC	12x6-E	22.2	17.81	395.3	8,521	48.4	2181	76.93	5.52
	APC	12x8-E	22.2	22.64	502.5	8,303	62.9	2019	71.22	4.02
	APC	12x10-E	22.2	27.79	617.0	8,081	76.5	2203	77.71	3.57
	APC	12x12-E	22.2	30.25	671.5	7,841	89.1	2014	71.04	3.00
	APC	13x6.5-E	22.2	25.35	562.8	8,181	50.4	2785	98.24	4.95
	APC	13x8-E	22.2	27.61	612.9	8,088	61.3	2746	96.86	4.48
	APC	13x10-E	22.2	37.76	838.2	7,664	72.6	2600	91.71	3.10
	APC	14x7-E	22.2	31.20	692.6	7,806	51.7	3235	114.11	4.67
	APC	14x8.5-E	22.2	33.36	740.5	7,837	63.1	3450	121.69	4.66
	APC	14x10-E	22.2	33.44	742.3	7,848	74.3	3283	115.80	4.42
	APC	14x12-E	22.2	49.19	1091.9	7,179	81.6	2777	97.95	2.54
	APC	15x4-E	22.2	25.09	557.0	8,191	31.0	3272	115.42	5.87
	APC	15x6-E	22.2	33.55	744.8	7,827	44.5	3807	134.29	5.11
	APC	15x8-E	22.2	35.19	781.2	7,760	58.8	3736	131.78	4.78
	APC	15x10-E	22.2	51.08	1133.9	7,096	67.2	3842	135.52	3.39
	MAS	12x6x3	22.2	19.33	429.0	8,444	48.0	2302	81.20	5.37
	MAS	12x8x3	22.2	26.99	599.2	7,987	60.5	2922	103.07	4.88
	MAS	13x8x3	22.2	29.97	665.4	7,863	59.6	3225	113.76	4.85
	MAS	14x7x3	22.2	36.19	803.4	7,722	51.2	3883	136.97	4.83
	MAS	14x9x3	22.2	42.93	953.1	7,442	63.4	4255	150.09	4.46
	MAS	15x7x3	22.2	44.71	992.5	7,335	48.6	4541	160.18	4.58
	MAS	16x8x3	22.2	50.93	1130.6	7,063	53.5	5051	178.17	4.47
	Prop	Prop	Input	Motor	Watts	Prop	Pitch	Thrust	Thrust	Thrust Eff.
	Manf.	Size	Voltage	Amps	Input	RPM	Speed	Grams	Ounces	Grams/W
	APC	10x7-E	29.6	20.32	601.5	11,276	74.7	2144	75.63	3.56
	APC	10x10-E	29.6	29.79	881.8	10,682	101.2	2010	70.90	2.28
	APC	11x5.5-E	29.6	22.65	670.4	11,168	58.2	2887	101.83	4.31
	APC	11x7-E	29.6	27.39	810.6	10,956	72.6	3037	107.13	3.75
	APC	11x8.5-E	29.6	33.00	976.9	10,681	86.0	2929	103.32	3.00
	APC	11x10-E	29.6	37.71	1116.3	10,473	99.2	2724	96.09	2.44
	APC	12x6-E	29.6	30.42	900.5	10,651	60.5	3602	127.06	4.00
	APC	12x8-E	29.6	38.26	1132.4	10,443	79.1	3318	117.04	2.93
	APC	13x6.5-E	29.6	45.50	1346.8	10,129	62.3	4340	153.09	3.22
	APC	15x4-E	29.6	42.96	1271.6	10,072	38.2	5369	189.38	4.22
	MAS	10x7x3	29.6	22.28	659.6	11,189	74.2	2735	96.47	4.15
	MAS	11x7x3	29.6	27.36	809.8	10,938	72.5	3281	115.73	4.05
	MAS	11x8x3	29.6	30.30	896.7	10,812	81.9	3393	119.68	3.78
	MAS	12x6x3	29.6	31.18	922.9	10,767	61.2	3834	135.24	4.15
	MAS	12x8x3	29.6	43.07	1274.8	10,097	76.5	4699	165.75	3.69
	MAS	13x8x3	29.6	48.96	1449.1	9,956	75.4	5250	185.19	3.62
	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.