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 Starship Excalibur

Semroc - Starship Excalibur {Kit} (KV-85) [2013-]

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 A22.443:18:1206.9949.146.41.402.003.20117
Apogee 1/2A22.363:16:1167.2324.456.60.721.101.6229
Estes A3T2.504:110:1250.5548.053.51.072.102.97105
Estes A10T2.384:121:1563.7832.581.40.851.502.1556
MPC 1/2A3-M2.435:18:1213.2726.033.10.461.201.4626
Estes 1/2A3T2.435:112:1340.4924.892.00.381.201.3823
Quest C63.065:125:1592.06127.082.12.634.006.43638
Estes A82.785:116:1377.3641.211.80.811.702.3172
Estes 1/2A62.696:113:1316.9220.162.00.331.001.1313
Apogee C42.806:118:1438.72134.591.72.424.106.32688
Estes C52.956:133:1776.34165.841.42.044.506.34725
Estes B42.877:121:1522.1682.261.31.043.103.94230
Weco C62.948:120:1405.46115.141.71.753.805.35435
Estes C63.028:123:1482.03158.491.51.864.506.16629
Estes B62.848:120:1468.0489.781.60.863.303.96242
Quest A62.748:119:1408.1438.071.80.471.701.9754
Quest A8 Q-Jet2.668:118:1352.2136.742.00.401.601.8046
FSI A62.779:119:1406.4928.691.60.551.101.4530
Aerotech C6W3.0110:119:1444.31185.101.71.654.606.05713
Quest B62.7710:124:1469.65102.791.60.843.504.14276
Apogee B72.5211:124:1657.34116.851.30.793.704.29335
Aerotech D82.8712:125:1645.64275.151.12.484.907.181264
Apogee C102.8216:142:11091.18195.720.81.054.705.55655
Aerotech C12T2.9718:134:1727.06191.061.21.004.805.60643
Aerotech D13W3.3718:136:1820.62306.510.81.745.406.941176
Aerotech D10W3.1120:141:11012.42322.640.81.445.406.641148
Apogee D103.1122:141:11018.03326.660.81.445.406.641155
Aerotech D21T3.0834:153:11322.11377.630.60.945.706.441131
Aerotech D24T3.2936:168:1966.15318.040.80.955.806.551026
Aerotech E25T2.9138:173:12007.95445.190.51.025.606.421236

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.