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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 66 motors that fit and appear to have enough thrust (734 motors didn't fit, 11 motors failed safety checks). 75 motor had thrust curves available and 149 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:   Hobgoblin
Owner: Philip Dougan
Body Diameter: 6.7cm
Dry Weight: 515g
MMT Diameter: 29.0mm
MMT Length: 20.0cm
CD: 0.30

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 E23 619g 16m/s 42m/s 5.3G 121m 5.5s 4s
OK Cesaroni F36 619g 16m/s 60m/s 12.1G 183m 6.4s 5s
OK AeroTech F37 624g 16m/s 65m/s 6.6G 230m 7.3s 6s
OK AeroTech F27 595g 15m/s 61m/s 5.2G 234m 7.5s 5s
OK Cesaroni F32 622g 15m/s 67m/s 6.2G 248m 7.6s 6s
OK Cesaroni F36 616g 17m/s 70m/s 6.2G 250m 7.5s 6s
OK AeroTech F23 597g 16m/s 65m/s 7.3G 262m 7.8s 6s
OK AeroTech F62 624g 21m/s 77m/s 9.5G 271m 7.5s 7s
OK Cesaroni F31 617g 16m/s 73m/s 8.2G 282m 8.0s 6s
OK Cesaroni F120 621g 31m/s 86m/s 22.8G 293m 7.6s 7s
OK Cesaroni F59 614g 22m/s 83m/s 10.7G 301m 7.9s 7s
OK AeroTech F42 591g 22m/s 79m/s 10.9G 303m 7.9s 6s
OK AeroTech F20 595g 17m/s 70m/s 7.2G 304m 8.2s 6s
OK AeroTech F26 616g 15m/s 74m/s 5.3G 326m 8.7s 6s
OK AeroTech F67 595g 26m/s 94m/s 13.9G 355m 8.3s 7s
OK AeroTech F50 600g 22m/s 99m/s 11.3G 404m 8.9s 7s
OK AeroTech F25 605g 20m/s 86m/s 8.7G 409m 9.3s 7s
OK AeroTech F52 637g 24m/s 98m/s 11.7G 412m 9.1s 8s
OK AeroTech F40 641g 21m/s 97m/s 9.8G 445m 9.6s 8s
OK AeroTech G54 652g 22m/s 106m/s 11.8G 465m 9.6s 8s
OK Estes F50 599g 23m/s 110m/s 12.4G 471m 9.5s 8s
OK Cesaroni G88 667g 25m/s 117m/s 16.8G 485m 9.6s 9s
OK AeroTech G104 651g 29m/s 120m/s 18.1G 502m 9.6s 9s
OK AeroTech G38 641g 18m/s 103m/s 7.4G 512m 10.4s 8s
OK AeroTech G74 602g 25m/s 128m/s 14.6G 536m 10.0s 9s
OK AeroTech G53 661g 24m/s 115m/s 12.4G 541m 10.3s 8s
OK Cesaroni G80 658g 23m/s 131m/s 14.3G 566m 10.3s 9s
OK AeroTech G77 680g 22m/s 135m/s 12.9G 607m 10.7s 9s
OK AeroTech G40 638g 21m/s 123m/s 10.7G 612m 10.8s 9s
OK Estes G40 638g 21m/s 123m/s 10.7G 612m 10.8s 9s
OK AeroTech G77 638g 23m/s 145m/s 15.0G 637m 10.7s 9s
OK AeroTech G79 672g 25m/s 142m/s 14.2G 648m 10.9s 9s
OK Cesaroni G83 660g 25m/s 144m/s 14.5G 654m 10.9s 10s
OK Cesaroni G68 671g 22m/s 139m/s 13.0G 654m 11.1s 9s
OK AeroTech G72 647g 22m/s 147m/s 15.5G 655m 10.9s 10s
OK Cesaroni G57 661g 23m/s 135m/s 12.6G 663m 11.2s 9s
OK AeroTech G79 639g 22m/s 143m/s 12.1G 665m 11.1s 9s
OK Cesaroni G250 656g 42m/s 165m/s 44.7G 678m 10.7s 10s
OK AeroTech G76 662g 31m/s 144m/s 22.3G 706m 11.1s 9s
OK Cesaroni G126 660g 31m/s 163m/s 23.6G 717m 11.0s 10s
OK AeroTech G75 648g 26m/s 159m/s 15.5G 720m 11.2s 10s
OK AeroTech G64 666g 27m/s 142m/s 15.6G 726m 11.4s 9s
OK AeroTech G25 636g 16m/s 116m/s 5.9G 733m 12.5s 7s
OK Cesaroni G131 715g 28m/s 166m/s 21.1G 742m 11.3s 10s
OK AeroTech G78 640g 25m/s 164m/s 15.3G 767m 11.5s 10s
OK AeroTech G125 640g 30m/s 182m/s 23.5G 788m 11.4s 10s
OK AeroTech G80 643g 26m/s 170m/s 15.6G 811m 11.7s 10s
OK Cesaroni G106 702g 25m/s 180m/s 18.1G 831m 12.0s 11s
OK AeroTech G75 748g 21m/s 171m/s 10.1G 889m 12.7s 10s
OK Cesaroni G125 710g 30m/s 204m/s 22.2G 953m 12.4s 11s
OK AeroTech H165 717g 33m/s 211m/s 26.7G 953m 12.3s 11s
OK Cesaroni G118 703g 28m/s 204m/s 21.7G 958m 12.5s 11s
OK Cesaroni G54 708g 28m/s 164m/s 16.5G 975m 13.0s 10s
OK Cesaroni H133 705g 31m/s 209m/s 26.8G 978m 12.5s 11s
OK Cesaroni H410 698g 55m/s 239m/s 77.4G 988m 12.1s 12s
OK Cesaroni H163 702g 35m/s 221m/s 30.6G 997m 12.5s 11s
OK Cesaroni H90 678g 28m/s 205m/s 22.4G 1,007m 12.7s 11s
OK Cesaroni H87 720g 25m/s 200m/s 17.2G 1,009m 13.0s 11s
OK AeroTech H128 721g 33m/s 218m/s 25.1G 1,009m 12.6s 11s
OK Cesaroni H54 724g 24m/s 170m/s 13.2G 1,015m 13.4s 10s
OK AeroTech G138 663g 30m/s 234m/s 26.8G 1,019m 12.5s 11s
OK AeroTech H238 711g 38m/s 228m/s 33.7G 1,019m 12.5s 12s
OK AeroTech H115 720g 28m/s 220m/s 16.8G 1,048m 12.9s 11s
OK AeroTech H182 722g 33m/s 280m/s 26.7G 1,226m 13.3s 12s
OK AeroTech H195 712g 40m/s 303m/s 35.5G 1,304m 13.4s 12s
warningsD Estes G80 643g 12:1 thrust/weight ratio (no data)

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 (12m/s)
failedG AeroTech E16 speed at end of launch guide too slow (13m/s)
failedG Estes F15 speed at end of launch guide too slow (11m/s)
failedG Cesaroni F29 speed at end of launch guide too slow (14m/s)
failed5 Estes F26 average thrust fails 5:1 thrust/weight ratio (4:1)
failedG AeroTech F22 speed at end of launch guide too slow (13m/s)
failedG Apogee F10 speed at end of launch guide too slow (12m/s)
failedG AeroTech G8 speed at end of launch guide too slow (5m/s)
failedG AeroTech G11 speed at end of launch guide too slow (12m/s)
failedG AeroTech G12 speed at end of launch guide too slow (12m/s)
failedG Cesaroni G33 speed at end of launch guide too slow (14m/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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