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 One

Semroc - Hydra One {Kit} (KA-18)

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 C46.602:17:1170.0650.043.52.372.304.47207
Estes C56.742:112:1335.8962.691.92.012.804.61232
Estes B46.672:18:1196.3929.557.91.061.402.2653
Weco C66.743:17:1193.5838.375.71.771.803.37109
Estes C66.813:18:1221.1663.534.51.932.804.53223
Estes B66.643:17:1185.7733.315.00.861.502.1655
Aerotech C6W6.814:17:1172.8779.603.01.673.204.67295
Quest B66.574:19:1230.1038.773.80.791.802.3969
Apogee B76.324:19:1242.3142.312.50.781.902.4882
Aerotech D86.674:19:1246.14152.962.22.465.507.76926
Apogee C106.626:115:1429.4583.481.61.013.504.31281
Aerotech C12T6.776:112:1328.3082.681.80.963.504.26268
Aerotech D13W7.167:113:1345.49164.761.51.795.707.29871
Aerotech D10W6.917:115:1408.33170.781.61.396.107.29876
Apogee D106.918:115:1410.63171.291.61.506.007.30878
Aerotech D21T6.8813:119:1535.93190.151.20.986.507.28923
Aerotech D24T7.0913:125:1405.02161.361.51.005.906.70740
Aerotech E25T6.7114:127:1782.97233.580.90.957.308.051189

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.