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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 85 motors that fit and appear to have enough thrust (695 motors didn't fit, 25 motors failed safety checks). 108 motor had thrust curves available and 212 flight simulations were performed. Browse the motors that did and didn't work right here or download the results as a spreadsheet.

The Rocket

Rocket Name:   Strong Arm
Owner: Brian Rennaker
Body Diameter: 66.0mm
Dry Weight: 780g
MMT Diameter: 29.0mm
MMT Length: 325.0mm
CD: 0.48

Motors That Work

These motors fit your rocket and appear to have enough thrust to lift it safely. If thrust curves are available, a quick simulation has been run to give a rough idea of the performance of your rocket on this motor. We encourage you to run a more complete simulation with any motor you plan to use; see the simulators page for more info.

  Motor Weight Launch Velocity Accel Altitude Time Delay
OK AeroTech F62 889g 16m/s 51m/s 6.3G 142m 5.7s 5s
OK AeroTech F42 856g 16m/s 51m/s 7.2G 158m 6.0s 5s
OK Cesaroni F120 886g 23m/s 59m/s 15.6G 159m 5.8s 5s
OK Cesaroni F59 879g 16m/s 55m/s 7.2G 160m 6.0s 5s
OK AeroTech F67 860g 19m/s 63m/s 9.3G 194m 6.4s 5s
OK AeroTech F50 865g 17m/s 66m/s 7.6G 224m 7.0s 6s
OK AeroTech F52 902g 17m/s 66m/s 8.0G 232m 7.2s 6s
OK AeroTech F40 906g 16m/s 65m/s 6.7G 251m 7.6s 6s
warningsW Estes F50 864g 17m/s 73m/s 8.3G 269m 7.6s 6s
OK AeroTech G54 917g 17m/s 72m/s 8.1G 269m 7.6s 6s
OK Cesaroni G88 932g 18m/s 81m/s 11.7G 287m 7.7s 7s
OK AeroTech G104 916g 22m/s 83m/s 12.6G 299m 7.7s 7s
OK AeroTech G74 867g 18m/s 86m/s 9.8G 315m 8.1s 7s
OK AeroTech G53 926g 18m/s 79m/s 8.5G 322m 8.3s 6s
OK Cesaroni G80 923g 17m/s 90m/s 9.9G 342m 8.4s 7s
warningsW Estes G40 903g 16m/s 83m/s 7.2G 367m 8.9s 7s
OK AeroTech G40 903g 16m/s 83m/s 7.2G 367m 8.9s 7s
OK AeroTech G77 945g 16m/s 94m/s 9.0G 371m 8.8s 7s
OK AeroTech G77 903g 17m/s 99m/s 10.3G 392m 8.9s 8s
OK AeroTech G79 937g 19m/s 99m/s 9.9G 403m 9.0s 8s
OK Cesaroni G68 936g 17m/s 96m/s 9.0G 404m 9.2s 7s
OK AeroTech G72 912g 17m/s 101m/s 10.6G 406m 9.1s 8s
OK Cesaroni G83 925g 19m/s 100m/s 10.0G 406m 9.0s 8s
OK Cesaroni G57 926g 17m/s 93m/s 8.7G 409m 9.3s 7s
OK AeroTech G79 904g 16m/s 98m/s 8.3G 410m 9.3s 7s
OK Cesaroni G250 921g 32m/s 116m/s 31.3G 433m 8.9s 8s
OK AeroTech G76 927g 23m/s 101m/s 15.6G 448m 9.3s 7s
OK Cesaroni G126 925g 23m/s 114m/s 16.5G 458m 9.3s 8s
OK AeroTech G64 931g 21m/s 100m/s 10.9G 461m 9.6s 7s
OK AeroTech G75 911g 18m/s 109m/s 10.3G 478m 9.7s 8s
OK Cesaroni G131 980g 23m/s 118m/s 15.0G 483m 9.5s 8s
OK AeroTech G78 905g 19m/s 113m/s 10.5G 493m 9.8s 8s
OK AeroTech G125 905g 22m/s 126m/s 16.4G 514m 9.7s 9s
OK AeroTech G80 908g 20m/s 118m/s 10.7G 527m 10.0s 8s
OK Cesaroni G106 967g 19m/s 127m/s 12.8G 546m 10.2s 9s
OK KBA G82 1,011g 17m/s 120m/s 9.3G 552m 10.5s 9s
OK KBA G135 1,006g 21m/s 133m/s 15.2G 563m 10.2s 9s
OK AeroTech G75 1,013g 16m/s 122m/s 7.1G 588m 10.9s 9s
OK Cesaroni G125 974g 23m/s 146m/s 15.9G 648m 10.8s 9s
OK Cesaroni G118 968g 22m/s 145m/s 15.5G 650m 10.8s 9s
OK AeroTech H165 982g 25m/s 151m/s 19.1G 652m 10.7s 10s
OK Cesaroni G54 973g 21m/s 117m/s 11.7G 652m 11.3s 8s
OK Cesaroni H175 1,027g 25m/s 154m/s 22.7G 659m 10.7s 10s
OK Cesaroni H133 970g 25m/s 150m/s 19.2G 667m 10.9s 10s
OK Cesaroni H54 989g 18m/s 121m/s 9.4G 682m 11.7s 8s
OK Cesaroni H163 967g 26m/s 158m/s 21.9G 685m 10.9s 10s
OK Cesaroni H410 962g 41m/s 171m/s 55.1G 686m 10.6s 10s
OK Cesaroni H87 985g 19m/s 143m/s 12.3G 686m 11.3s 9s
OK Cesaroni H90 943g 22m/s 145m/s 15.8G 686m 11.1s 9s
OK AeroTech H128 986g 25m/s 157m/s 18.0G 697m 11.0s 10s
OK AeroTech G138 928g 22m/s 165m/s 19.1G 702m 11.0s 10s
OK AeroTech H238 976g 29m/s 164m/s 24.1G 708m 10.9s 10s
OK Cesaroni H123 1,008g 21m/s 155m/s 13.2G 708m 11.2s 10s
OK AeroTech H115 985g 21m/s 158m/s 11.9G 728m 11.3s 10s
OK AeroTech H97 1,058g 19m/s 151m/s 9.7G 739m 11.7s 10s
OK Cesaroni H118 1,012g 23m/s 160m/s 16.1G 754m 11.5s 10s
OK KBA H130 1,489g 21m/s 143m/s 14.1G 783m 12.2s 10s
OK Cesaroni H237 1,074g 30m/s 186m/s 27.5G 808m 11.5s 11s
OK AeroTech H220 1,030g 31m/s 187m/s 29.4G 822m 11.5s 11s
OK Cesaroni H151 1,018g 27m/s 180m/s 19.4G 834m 11.8s 10s
OK AeroTech H210 1,026g 29m/s 191m/s 25.1G 839m 11.7s 11s
OK Cesaroni H135 1,031g 24m/s 183m/s 15.4G 872m 12.1s 10s
OK Cesaroni H160 1,052g 25m/s 190m/s 17.0G 872m 12.0s 11s
OK Cesaroni H170 1,012g 28m/s 190m/s 22.9G 873m 11.9s 11s
OK AeroTech H182 987g 26m/s 201m/s 19.1G 883m 11.9s 11s
OK AeroTech H180 1,032g 29m/s 199m/s 24.5G 900m 12.0s 11s
OK AeroTech H250 1,036g 35m/s 209m/s 31.0G 914m 12.0s 11s
OK AeroTech H135 992g 23m/s 188m/s 14.9G 937m 12.5s 10s
OK Cesaroni H53 1,066g 16m/s 148m/s 7.9G 938m 13.5s 9s
OK KBA H225 1,096g 25m/s 209m/s 24.7G 939m 12.3s 11s
OK Cesaroni H295 1,122g 34m/s 220m/s 33.2G 955m 12.2s 11s
OK AeroTech H195 977g 31m/s 219m/s 25.5G 955m 12.1s 11s
OK Cesaroni H180 1,094g 30m/s 209m/s 24.2G 990m 12.5s 11s
OK Cesaroni H194 1,064g 29m/s 216m/s 26.1G 997m 12.5s 11s
OK Cesaroni H200 1,054g 31m/s 219m/s 27.1G 1,015m 12.5s 11s
OK Cesaroni H140 1,057g 28m/s 209m/s 22.7G 1,050m 12.9s 11s
OK Cesaroni H255 1,012g 35m/s 243m/s 36.9G 1,058m 12.5s 11s
OK Cesaroni H399 1,074g 41m/s 254m/s 50.9G 1,067m 12.5s 12s
OK Cesaroni H159 1,123g 24m/s 229m/s 16.1G 1,130m 13.3s 11s
OK Cesaroni H233 1,108g 32m/s 250m/s 30.3G 1,155m 13.1s 12s
OK Cesaroni H255 1,098g 34m/s 260m/s 37.4G 1,173m 13.1s 12s
OK Cesaroni H160 1,099g 32m/s 230m/s 28.4G 1,176m 13.3s 11s
OK Cesaroni I204 1,129g 33m/s 260m/s 31.3G 1,254m 13.5s 12s
OK AeroTech I205 1,095g 29m/s 267m/s 32.9G 1,258m 13.4s 12s
warningsW,D Estes G80 905g 9:1 thrust/weight ratio (no data)

W Motor total weight unknown, lift-off Weight not accurate.

D No simulation data found for this motor.

Don't like the units? Login to set your preferences. Don't understand the results? See the motor guide help page.

Motors That Fail

These motors fit your rocket, but failed one safety check or another. They may actually work, but you should use them only with caution. We encourage you to run a more complete simulation to verify flight safety; see the simulators page for more info.

  Motor Reason
failedG Estes E16 speed at end of launch guide too slow (8m/s)
failedG AeroTech E23 speed at end of launch guide too slow (11m/s)
failedG AeroTech E16 speed at end of launch guide too slow (9m/s)
failedG AeroTech F23 speed at end of launch guide too slow (12m/s)
failedG Cesaroni F36 speed at end of launch guide too slow (12m/s)
failedG AeroTech F27 speed at end of launch guide too slow (11m/s)
failedG Estes F15 speed at end of launch guide too slow (7m/s)
failedG AeroTech F37 speed at end of launch guide too slow (12m/s)
failedG Cesaroni F36 speed at end of launch guide too slow (12m/s)
failedG AeroTech F20 speed at end of launch guide too slow (12m/s)
failedG Cesaroni F32 speed at end of launch guide too slow (11m/s)
failedG Cesaroni F29 speed at end of launch guide too slow (10m/s)
failedG Cesaroni F31 speed at end of launch guide too slow (11m/s)
failed5 Estes F26 average thrust fails 5:1 thrust/weight ratio (3:1)
failedG AeroTech F26 speed at end of launch guide too slow (11m/s)
failedG AeroTech F22 speed at end of launch guide too slow (9m/s)
failedG Apogee F10 speed at end of launch guide too slow (8m/s)
failedG AeroTech F25 speed at end of launch guide too slow (14m/s)
failedG AeroTech G38 speed at end of launch guide too slow (13m/s)
failedG AeroTech G25 speed at end of launch guide too slow (11m/s)
failedG AeroTech G8 speed at end of launch guide too slow (1m/s)
failedG AeroTech G11 speed at end of launch guide too slow (8m/s)
failedG AeroTech G12 speed at end of launch guide too slow (9m/s)
failedG Cesaroni G33 speed at end of launch guide too slow (11m/s)
failedG Cesaroni H42 speed at end of launch guide too slow (13m/s)

G These simulations were run with a launch guide length of 2m (rod, rail or tower). If this is not correct, launch guide lengths can be specified for your saved rockets. (The minimum velocity required is approximately 15m/s or 50ft/s.)

5 The 5:1 thrust-to-weight ratio check is a useful rule of thumb, but it does break down for motors with unusual thrust curves. For example, motors with a high initial thrust and a long tail-off may fail this test but still be safe for use.

Download the Results

The data is presented in a compact form in the tables above, broken down by motors that worked and those that did not. If you would like to analyze the data further, this section provides download links for files in a generic spreadsheet format (comma-separated value, or CSV) that can be opened with almost any spreadsheet program.

CSV Excel   Download full details of the simulation runs with the various motors:
that worked, that failed, or all of them.
 
RockSim   Download the list of motors that fit your rocket into a batch for use with SMARTSim. (See the Simulators page for more info.)

You should download these files to your machine and then open them. Normally, clicking the link will prompt you to do this. However, if your browser insists on opening the file as plain text, you can right-click (control-click on the Mac) on the link and chose Save File As (or similar).

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