| Cobra C2203/52 Motor Propeller Data | ||||||||||||||
| Motor Wind | Motor Kv | No-Load Current | Motor Resistance | I Max | P Max (2S) | |||||||||
| 52-Turn Delta | 1540 RPM/Volt | Io = 0.36 Amps @ 8v | Rm = 0.238 Ohms | 7 Amps | 55 W | |||||||||
| Outside Diameter | Body Length | Total Shaft Length | Shaft Diameter | Motor Weight | ||||||||||
| 26.8 mm, 1.06 in. | 11.4mm, 0.45 in. | 19.6 mm, 0.77 in. | 3.0 mm, 0.118 in. | 17.5 gm, 0.62 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 | 4.95 | 36.6 | 8,070 | 30.6 | 258 | 9.10 | 7.04 | |||||
| APC | 7x5-SF | 7.4 | 5.60 | 41.4 | 7,620 | 36.1 | 259 | 9.14 | 6.25 | |||||
| APC | 7x6-SF | 7.4 | 6.51 | 48.2 | 7,040 | 40.0 | 244 | 8.61 | 5.06 | |||||
| APC | 8x3.8-SF | 7.4 | 6.73 | 49.8 | 6,830 | 24.6 | 324 | 11.43 | 6.51 | |||||
| GWS | 7x3.5-DD | 7.4 | 3.36 | 24.9 | 9,180 | 30.4 | 205 | 7.23 | 8.24 | |||||
| GWS | 8x4-DD | 7.4 | 5.45 | 40.3 | 7,700 | 29.2 | 305 | 10.76 | 7.56 | |||||
| GWS | 8x4.3-SF | 7.4 | 6.93 | 51.3 | 6,740 | 27.4 | 328 | 11.57 | 6.40 | |||||
| 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. | ||||||||||||||