| Cobra C2826/8 Motor Propeller Data | ||||||||||||||
| Motor Wind | Motor Kv | No-Load Current | Motor Resistance | I Max | P Max (3S) | |||||||||
| 8-Turn Delta | 1130 RPM/Volt | Io = 2.30 Amps @ 10v | Rm = 0.025 Ohms | 55 Amps | 610 W | |||||||||
| Outside Diameter | Body Length | Total Shaft Length | Shaft Diameter | Motor Weight | ||||||||||
| 35.0 mm, 1.38 in. | 46.0 mm, 1.81 in. | 66.0 mm, 2.60 in. | 5.00 mm, 0.197 in. | 171 gm, 6.03 oz | ||||||||||
| Prop | Prop | Input | Motor | Watts | Prop | Pitch | Thrust | Thrust | Thrust Eff. | |||||
| Manf. | Size | Voltage | Amps | Input | RPM | Speed | Grams | Ounces | Grams/W | |||||
| APC | 8x8-E | 11.1 | 28.85 | 320.3 | 10,257 | 77.7 | 930 | 32.80 | 2.90 | |||||
| APC | 9x6-E | 11.1 | 23.31 | 258.7 | 10,577 | 60.1 | 1176 | 41.48 | 4.55 | |||||
| APC | 9x7.5-E | 11.1 | 35.58 | 394.9 | 9,857 | 70.0 | 1273 | 44.90 | 3.22 | |||||
| APC | 9x9-E | 11.1 | 39.50 | 438.5 | 9,578 | 81.6 | 1260 | 44.44 | 2.87 | |||||
| APC | 10x5-E | 11.1 | 28.75 | 319.1 | 10,256 | 48.6 | 1516 | 53.47 | 4.75 | |||||
| APC | 10x6-E | 11.1 | 30.51 | 338.7 | 10,098 | 57.4 | 1599 | 56.40 | 4.72 | |||||
| APC | 10x7-E | 11.1 | 35.52 | 394.3 | 9,860 | 65.4 | 1728 | 60.95 | 4.38 | |||||
| APC | 10x10-E | 11.1 | 49.55 | 550.0 | 9,041 | 85.6 | 1499 | 52.88 | 2.73 | |||||
| APC | 11x5.5-E | 11.1 | 38.48 | 427.2 | 9,636 | 50.2 | 2022 | 71.32 | 4.73 | |||||
| APC | 11x7-E | 11.1 | 45.11 | 500.7 | 9,314 | 61.7 | 2105 | 74.25 | 4.20 | |||||
| APC | 11x8-E | 11.1 | 47.89 | 531.5 | 9,076 | 68.8 | 1992 | 70.27 | 3.75 | |||||
| APC | 11x8.5-E | 11.1 | 51.62 | 573.0 | 8,929 | 71.9 | 2013 | 71.01 | 3.51 | |||||
| APC | 12x6-E | 11.1 | 48.68 | 540.4 | 9,035 | 51.3 | 2416 | 85.22 | 4.47 | |||||
| APC | 12x8-E | 11.1 | 58.63 | 650.8 | 8,504 | 64.4 | 2115 | 74.60 | 3.25 | |||||
| APC | 13x4-E | 11.1 | 38.78 | 430.4 | 9,678 | 36.7 | 2310 | 81.48 | 5.37 | |||||
| Prop | Prop | Input | Motor | Watts | Prop | Pitch | Thrust | Thrust | Thrust Eff. | |||||
| Manf. | Size | Voltage | Amps | Input | RPM | Speed | Grams | Ounces | Grams/W | |||||
| APC | 8x4-E | 14.8 | 23.96 | 354.5 | 14,441 | 54.7 | 1409 | 49.70 | 3.97 | |||||
| APC | 8x6-E | 14.8 | 38.23 | 565.8 | 13,428 | 76.3 | 1618 | 57.07 | 2.86 | |||||
| APC | 8x8-E | 14.8 | 48.71 | 720.9 | 12,822 | 97.1 | 1471 | 51.89 | 2.04 | |||||
| APC | 9x4.5-E | 14.8 | 34.59 | 511.9 | 13,728 | 58.5 | 2056 | 72.52 | 4.02 | |||||
| APC | 9x6-E | 14.8 | 39.57 | 585.7 | 13,408 | 76.2 | 1947 | 68.68 | 3.32 | |||||
| APC | 9x7.5-E | 14.8 | 58.87 | 871.2 | 12,176 | 86.5 | 1964 | 69.28 | 2.25 | |||||
| APC | 10x5-E | 14.8 | 48.48 | 717.5 | 12,829 | 60.7 | 2373 | 83.70 | 3.31 | |||||
| APC | 10x6-E | 14.8 | 50.14 | 742.0 | 12,646 | 71.9 | 2517 | 88.78 | 3.39 | |||||
| APC | 10x7-E | 14.8 | 58.11 | 860.0 | 12,182 | 80.8 | 2574 | 90.79 | 2.99 | |||||
| Prop | Prop | Input | Motor | Watts | Prop | Pitch | Thrust | Thrust | Thrust Eff. | |||||
| Manf. | Size | Voltage | Amps | Input | RPM | Speed | Grams | Ounces | Grams/W | |||||
| APC | 7x4-E | 18.5 | 24.31 | 449.8 | 18,237 | 69.1 | 1479 | 52.17 | 3.29 | |||||
| APC | 7x5-E | 18.5 | 30.73 | 568.5 | 17,757 | 84.1 | 1500 | 52.91 | 2.64 | |||||
| APC | 7x6-E | 18.5 | 31.57 | 584.1 | 17,615 | 100.1 | 1609 | 56.76 | 2.75 | |||||
| APC | 8x4-E | 18.5 | 37.02 | 684.9 | 17,305 | 65.5 | 2022 | 71.32 | 2.95 | |||||
| APC | 8x6-E | 18.5 | 59.05 | 1092.4 | 15,733 | 89.4 | 2201 | 77.64 | 2.01 | |||||
| APC | 9x4.5-E | 18.5 | 51.60 | 954.6 | 16,244 | 69.2 | 2985 | 105.29 | 3.13 | |||||
| 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. | ||||||||||||||