| Cobra C2202/70 Motor Propeller Data | ||||||||||||||
| Motor Wind | Motor Kv | No-Load Current | Motor Resistance | I Max | P Max (2S) | |||||||||
| 70-Turn Delta | 1530 RPM/Volt | Io = 0.25 Amps @ 8v | Rm = 0.336 Ohms | 6 Amps | 45 W | |||||||||
| Outside Diameter | Body Length | Total Shaft Length | Shaft Diameter | Motor Weight | ||||||||||
| 26.8 mm, 1.06 in. | 10.4mm, 0.41 in. | 18.6 mm, 0.73 in. | 3.0 mm, 0.118 in. | 15.0 gm, 0.53 oz | ||||||||||
| Prop | Prop | Input | Motor | Watts | Prop | Pitch | Thrust | Thrust | Thrust Eff. | |||||
| Manf. | Size | Voltage | Amps | Input | RPM | Speed | Grams | Ounces | Grams/W | |||||
| APC | 7x4-SF | 7.4 | 4.37 | 32.3 | 7,560 | 28.6 | 227 | 8.01 | 7.02 | |||||
| APC | 7x5-SF | 7.4 | 4.89 | 36.2 | 7,070 | 33.5 | 226 | 7.97 | 6.25 | |||||
| APC | 7x6-SF | 7.4 | 5.57 | 41.2 | 6,470 | 36.8 | 210 | 7.41 | 5.09 | |||||
| APC | 8x3.8-SF | 7.4 | 5.79 | 42.8 | 6,300 | 22.7 | 279 | 9.84 | 6.51 | |||||
| GWS | 7x3.5-DD | 7.4 | 3.04 | 22.5 | 8,730 | 28.9 | 181 | 6.38 | 8.05 | |||||
| GWS | 8x4-DD | 7.4 | 4.87 | 36.0 | 7,210 | 27.3 | 266 | 9.38 | 7.38 | |||||
| GWS | 8x4.3-SF | 7.4 | 5.94 | 44.0 | 6,160 | 25.1 | 275 | 9.70 | 6.26 | |||||
| GWS | 8x6-SF | 7.4 | 6.70 | 49.6 | 5,450 | 31.0 | 263 | 9.28 | 5.30 | |||||
| GWS | 9x5-DD | 7.4 | 6.51 | 48.2 | 5,600 | 26.5 | 298 | 10.51 | 6.19 | |||||
| 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. | ||||||||||||||