Rocket Motor Guide
Estes Astron Cobra
Estes - Astron Cobra {Kit} (K-10)
| Motor | Weight oz | TTW Average | TTW Peak | Accel f/s2 | Speed mph | Rod Len feet | Burnout Time sec | Optimal Delay sec | Time to Apogee sec | Altitude feet |
|---|---|---|---|---|---|---|---|---|---|---|
| Apogee A2 | 2.74 | 3:1 | 7:1 | 179.74 | 40.72 | 8.3 | 1.40 | 1.70 | 2.90 | 87 |
| Apogee 1/2A2 | 2.66 | 3:1 | 6:1 | 144.26 | 20.17 | 8.2 | 0.72 | 0.90 | 1.42 | 21 |
| Estes A3T | 2.80 | 3:1 | 8:1 | 218.95 | 40.76 | 5.1 | 1.04 | 1.70 | 2.54 | 79 |
| Estes A10T | 2.69 | 3:1 | 18:1 | 523.36 | 29.20 | 1.4 | 0.86 | 1.30 | 1.96 | 48 |
| MPC 1/2A3-M | 2.73 | 4:1 | 7:1 | 185.48 | 20.15 | 4.2 | 0.52 | 0.90 | 1.22 | 17 |
| Estes 1/2A3T | 2.73 | 4:1 | 11:1 | 298.48 | 23.61 | 2.9 | 0.42 | 1.10 | 1.32 | 22 |
| Quest C6 | 3.36 | 5:1 | 22:1 | 549.58 | 105.23 | 2.2 | 2.64 | 3.30 | 5.74 | 496 |
| Estes A8 | 3.08 | 5:1 | 14:1 | 344.58 | 37.73 | 1.9 | 0.82 | 1.60 | 2.22 | 61 |
| Estes 1/2A6 | 2.99 | 5:1 | 11:1 | 280.59 | 20.24 | 2.2 | 0.35 | 1.00 | 1.15 | 13 |
| Apogee C4 | 3.10 | 5:1 | 16:1 | 392.45 | 110.10 | 1.9 | 2.43 | 3.40 | 5.63 | 529 |
| Estes C5 | 3.25 | 6:1 | 29:1 | 654.31 | 137.50 | 1.4 | 2.04 | 3.70 | 5.54 | 556 |
| Estes B4 | 3.17 | 6:1 | 18:1 | 465.72 | 72.64 | 1.4 | 1.05 | 2.70 | 3.55 | 185 |
| Weco C6 | 3.24 | 7:1 | 18:1 | 380.31 | 96.91 | 1.8 | 1.76 | 3.20 | 4.76 | 337 |
| Estes C6 | 3.32 | 7:1 | 20:1 | 453.65 | 134.51 | 1.6 | 1.87 | 3.80 | 5.47 | 490 |
| Estes B6 | 3.14 | 7:1 | 17:1 | 442.84 | 79.69 | 1.6 | 0.87 | 2.90 | 3.57 | 193 |
| Quest A6 | 3.04 | 7:1 | 17:1 | 390.35 | 33.41 | 1.8 | 0.48 | 1.50 | 1.78 | 43 |
| Quest A8 Q-Jet | 2.96 | 7:1 | 16:1 | 325.06 | 30.91 | 2.0 | 0.42 | 1.40 | 1.62 | 33 |
| FSI A6 | 3.07 | 8:1 | 17:1 | 372.38 | 23.16 | 1.8 | 0.46 | 1.00 | 1.26 | 20 |
| Aerotech C6W | 3.31 | 9:1 | 17:1 | 399.60 | 159.44 | 1.8 | 1.66 | 3.80 | 5.26 | 548 |
| Quest B6 | 3.07 | 9:1 | 21:1 | 446.17 | 91.40 | 1.6 | 0.75 | 3.10 | 3.65 | 217 |
| Apogee B7 | 2.82 | 10:1 | 21:1 | 593.43 | 101.47 | 1.4 | 0.79 | 3.20 | 3.79 | 258 |
| Aerotech D8 | 3.17 | 10:1 | 22:1 | 573.80 | 234.20 | 1.2 | 2.48 | 4.00 | 6.28 | 972 |
| Apogee C10 | 3.12 | 14:1 | 37:1 | 976.91 | 170.24 | 0.8 | 1.06 | 4.00 | 4.86 | 501 |
| Aerotech C12T | 3.27 | 15:1 | 30:1 | 648.15 | 166.87 | 1.2 | 1.00 | 4.10 | 4.90 | 492 |
| Aerotech D13W | 3.66 | 16:1 | 32:1 | 743.58 | 262.48 | 0.9 | 1.75 | 4.40 | 5.95 | 897 |
| Aerotech D10W | 3.41 | 18:1 | 36:1 | 910.31 | 275.88 | 0.8 | 1.44 | 4.60 | 5.84 | 875 |
| Apogee D10 | 3.41 | 19:1 | 36:1 | 915.41 | 277.84 | 0.9 | 1.45 | 4.60 | 5.85 | 879 |
| Aerotech D21T | 3.38 | 30:1 | 46:1 | 1188.68 | 321.71 | 0.7 | 0.94 | 4.90 | 5.64 | 856 |
| Aerotech D24T | 3.59 | 31:1 | 59:1 | 874.03 | 274.49 | 0.8 | 0.95 | 4.90 | 5.65 | 782 |
| Aerotech E25T | 3.21 | 33:1 | 64:1 | 1791.22 | 378.35 | 0.6 | 1.02 | 4.70 | 5.52 | 935 |
Weight - The total weight of the rocket, with motor, at lift-off.
TTW Average - The average thrust-to-weight ratio of the rocket.
TTW Peak - The peak thrust-to-weight ratio of the rocket.
Accel - The maximum acceleration experienced by the rocket.
Speed - The maximum speed experienced by the rocket.
Rod Len - The minimal rod/rail length for the rocket to reach a safe speed (9 m/s) for free flight.
Optimal Delay - The optimal delay time (equal to the time from burnout to apogee).
Altitude - The altitude at apogee.
Note: These simulation results should be used with caution. Always double-check to ensure that your flight will be safe.
The Rocket Motor Guide helps you choose the right motor to use in your rocket by running a simulation using each of the motors in the RocketReviews.com motor database.
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