Rocket Motor Guide

Enter the name of the rocket. You can optionally select a rocket from the list that may appear as you type.
Enter the diameter of the rocket's body.
Enter the weight of the rocket without the motor.
Enter the diameter of the rocket's motor mount. This sets the largest diameter motor which will fit.
Enter the length of the rocket's motor mount. This sets the longest motor which will fit.
Select the approximate drag of the rocket. Sleeker rockets with a smooth finish will have lower drag.

Semroc Hydra VII

Semroc - Hydra VII {Kit} (KV-29)

MotorWeight
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 C1016.622:16:1148.8125.425.80.961.101.8640
Aerotech C12T16.772:15:1111.4025.315.91.011.101.9138
Aerotech D13W17.163:15:1120.9555.053.91.752.203.75169
Aerotech D10W16.913:16:1142.4756.254.11.462.403.66166
Apogee D1016.913:16:1143.3856.454.11.472.403.67166
Aerotech D21T16.885:17:1192.5467.382.70.982.903.68191
Aerotech D24T17.095:19:1144.1154.414.10.972.503.27132
Aerotech E25T16.715:110:1283.6684.362.11.033.604.43282

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.