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.

Estes Crossfire ISX

Estes - Crossfire ISX {Kit} (7220)

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 A21.545:113:1357.0795.022.61.393.404.59304
Apogee 1/2A21.465:111:1294.8451.592.90.702.202.70100
Estes A3T1.606:116:1421.5082.681.51.063.103.96231
Estes A10T1.497:135:1708.0352.051.20.932.202.93117
Estes 1/4A3T1.527:114:1352.3520.161.80.271.001.0713
Apogee 1/4A21.437:115:1413.5420.271.80.251.001.0513
MPC 1/2A3-M1.538:114:1359.8139.191.90.481.701.9856
Estes 1/2A3T1.538:121:1568.9535.711.30.431.601.8348
Quest C62.169:143:1784.14195.091.82.595.207.591086
Estes A81.889:127:1476.3962.651.60.782.603.18145
Estes 1/2A61.799:122:1429.1126.181.70.391.201.3925
Apogee C41.9010:131:1661.77201.961.32.395.207.391120
Estes C52.0511:156:11372.45249.871.22.015.507.311163
Estes B41.9712:135:1713.78125.041.11.124.105.02424
Weco C62.0413:134:1645.83185.701.41.725.006.52783
Estes C62.1213:139:1607.48237.911.31.945.507.241041
Estes B61.9414:134:1564.26137.231.40.944.405.14453
Quest A61.8414:133:1488.7662.751.50.442.602.84125
FSI A61.8715:132:1641.1763.881.40.522.502.82121
Aerotech C6W2.1117:133:1660.26271.861.41.625.707.121122
Quest B61.8717:140:1583.28163.341.40.824.705.32527
Apogee B71.6219:141:1886.16186.341.10.764.805.36591
Aerotech D81.9720:142:11014.71411.180.82.465.707.961841
Apogee C101.9228:171:11668.55291.580.61.045.706.541027
Aerotech C12T2.0730:157:11115.94283.441.00.985.906.681025
Aerotech D13W2.4731:162:11182.44432.230.71.736.508.031742
Aerotech D10W2.2235:169:11514.90464.050.61.426.407.621683
Apogee D102.2237:169:11523.27470.230.61.436.407.631695
Aerotech D21T2.1858:189:11982.32542.020.51.036.607.431643
Aerotech D24T2.4060:1114:11316.90450.320.70.946.807.541521
Aerotech E25T2.0164:1123:12975.05648.650.41.026.307.121741

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.