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 Excalibur

Semroc - Excalibur {Kit} (KV-43)

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 A21.545:113:1357.1196.302.61.393.504.69318
Apogee 1/2A21.465:111:1294.8852.182.90.702.202.70103
Estes A3T1.606:116:1421.5983.371.51.063.204.06240
Estes A10T1.497:135:1708.2452.401.20.932.202.93120
Estes 1/4A3T1.527:114:1352.4420.161.80.271.001.0713
Apogee 1/4A21.437:115:1413.6220.281.80.251.001.0513
MPC 1/2A3-M1.538:114:1360.0139.241.90.481.802.0857
Estes 1/2A3T1.538:121:1569.1335.761.30.431.601.8348
Quest C62.169:143:1784.30204.231.82.595.607.991173
Estes A81.889:127:1476.5562.921.60.782.703.28148
Estes 1/2A61.799:122:1429.2726.201.70.391.201.3926
Apogee C41.9010:131:1663.26212.791.32.395.607.791216
Estes C52.0511:156:11372.63261.731.22.015.807.611269
Estes B41.9712:135:1713.94126.311.11.124.305.22447
Weco C62.0413:134:1646.01191.581.41.725.306.82843
Estes C62.1213:139:1607.65246.261.31.945.907.641130
Estes B61.9414:134:1564.42138.381.40.944.605.34479
Quest A61.8414:133:1488.9362.841.50.442.602.84127
Quest A8 Q-Jet1.7614:131:1784.2677.511.60.463.103.36177
FSI A61.8715:132:1641.3363.891.40.522.502.82123
Aerotech C6W2.1117:133:1661.78278.811.41.626.107.521225
Quest B61.8717:140:1583.46165.261.40.824.905.52563
Apogee B71.6219:141:1886.36188.801.10.765.105.66638
Aerotech D81.9720:142:11018.10424.750.82.466.208.462031
Apogee C101.9228:171:11668.63298.020.61.046.106.941126
Aerotech C12T2.0730:157:11116.10289.971.00.986.307.081120
Aerotech D13W2.4731:162:11182.44447.270.71.737.008.531927
Aerotech D10W2.2235:169:11514.97481.830.61.426.908.121867
Apogee D102.2237:169:11523.30489.760.61.436.908.131880
Aerotech D21T2.1858:189:11982.38562.240.51.037.107.931830
Aerotech D24T2.4060:1114:11317.04463.650.70.947.308.041683
Aerotech E25T2.0164:1123:12975.20674.780.41.026.807.621947

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.