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.

Squirrel Works Space Ranger

Squirrel Works - Space Ranger {Kit}

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
Quest Micro Maxx0.543:19:1241.3326.088.60.861.201.8638
Quest Micro Maxx II0.543:123:1674.1528.131.80.701.301.8042
Apogee A20.7414:135:1805.46197.501.01.404.405.60636
Apogee 1/2A20.6614:129:1704.58126.331.10.703.704.20322
Estes A3T0.8016:142:1739.01172.581.11.024.405.22517
Estes A10T0.6817:191:11764.35180.591.00.894.104.79521
Estes 1/4A3T0.7217:136:1655.4034.171.20.311.501.6140
Apogee 1/4A20.6318:139:1915.4244.111.00.291.901.9960
MPC 1/2A3-M0.7322:136:1675.3994.261.40.523.303.62222
Estes 1/2A3T0.7322:155:1838.7276.931.00.392.903.09157
Quest C61.3623:1111:11591.11297.421.62.546.108.441695
Estes A81.0823:170:1922.58146.201.30.744.505.04462
Estes 1/2A60.9925:156:1790.5974.251.40.352.903.05152
Apogee C41.1027:181:11255.23307.590.92.365.807.961680
Estes C51.2528:1147:12443.93378.241.02.095.707.591716
Estes B41.1730:192:1931.43246.231.01.095.506.39875
Weco C61.2434:189:11534.97308.081.11.795.607.191287
Estes C61.3234:1101:11460.91386.851.11.916.107.811640
Estes B61.1436:187:11177.64265.021.10.915.606.31883
Quest A61.0436:185:11392.44150.031.20.504.404.70426
Quest A8 Q-Jet0.9637:180:11289.53151.651.30.424.304.52386
FSI A61.0739:182:11310.09109.551.10.493.703.99274
Aerotech C6W1.3143:185:11143.59430.641.11.696.407.891667
Quest B61.0745:1103:11882.74337.951.10.785.706.28985
Apogee B70.8248:1106:11979.47362.620.70.835.205.83955
Aerotech D81.1751:1110:11978.21651.940.72.445.808.042470
Apogee C101.1272:1185:12579.25482.390.51.036.207.031467
Aerotech C12T1.2777:1148:11998.56462.820.90.966.707.461532
Aerotech D13W1.6681:1160:11919.61638.310.51.727.208.722439
Aerotech D10W1.4190:1180:12614.30706.410.41.426.808.022277
Apogee D101.4196:1181:12688.29715.980.51.426.808.022294
Aerotech D21T1.38150:1231:13341.72828.870.51.036.907.732181
Aerotech D24T1.59156:1297:11980.51674.020.60.937.508.232120
Aerotech E25T1.21167:1320:15575.101004.080.41.016.207.012167

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.