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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 60 motors that fit and appear to have enough thrust (717 motors didn't fit, 14 motors failed safety checks). 72 motor had thrust curves available and 139 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:   TRF Croc
Owner: Jim Lane
Body Diameter: 2.20in
Dry Weight: 22.0oz
MMT Diameter: 29.0mm
MMT Length: 8.00in
CD: 0.20

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 Cesaroni F36 25.7oz 49ft/s 164ft/s 10.1G 476ft 5.9s 5s
OK AeroTech F37 25.9oz 48ft/s 179ft/s 5.5G 615ft 6.8s 5s
OK Cesaroni F36 25.6oz 50ft/s 193ft/s 5.1G 678ft 7.1s 6s
OK AeroTech F23 24.9oz 48ft/s 180ft/s 6.0G 707ft 7.3s 5s
OK AeroTech F62 25.8oz 62ft/s 213ft/s 8.0G 760ft 7.2s 6s
OK AeroTech F20 24.8oz 51ft/s 195ft/s 6.0G 845ft 7.9s 5s
OK Cesaroni F120 25.7oz 93ft/s 239ft/s 19.4G 848ft 7.4s 7s
OK AeroTech F42 24.7oz 65ft/s 219ft/s 9.0G 861ft 7.7s 6s
OK Cesaroni F59 25.5oz 64ft/s 231ft/s 9.0G 863ft 7.7s 7s
OK AeroTech F25 25.2oz 58ft/s 246ft/s 7.2G 1,227ft 9.4s 7s
OK AeroTech F50 25.0oz 70ft/s 278ft/s 9.4G 1,245ft 9.1s 8s
OK AeroTech F52 26.3oz 71ft/s 278ft/s 9.9G 1,269ft 9.2s 8s
OK AeroTech F40 26.5oz 62ft/s 278ft/s 8.3G 1,380ft 9.8s 8s
OK AeroTech G54 26.8oz 68ft/s 305ft/s 10.0G 1,484ft 10.0s 8s
warningsW Estes F50 24.9oz 71ft/s 312ft/s 10.4G 1,519ft 10.0s 9s
OK Cesaroni G88 27.4oz 74ft/s 333ft/s 14.3G 1,589ft 10.1s 9s
OK AeroTech G38 26.4oz 54ft/s 299ft/s 6.2G 1,633ft 10.8s 8s
OK AeroTech G104 26.8oz 87ft/s 342ft/s 15.3G 1,666ft 10.2s 9s
OK AeroTech G53 27.1oz 72ft/s 335ft/s 10.5G 1,803ft 10.9s 9s
OK AeroTech G74 25.1oz 76ft/s 361ft/s 12.3G 1,814ft 10.8s 10s
OK Cesaroni G80 27.1oz 70ft/s 373ft/s 12.1G 1,933ft 11.1s 10s
warningsW Estes G40 26.3oz 64ft/s 361ft/s 9.0G 2,105ft 11.8s 10s
OK AeroTech G40 26.3oz 64ft/s 361ft/s 9.0G 2,105ft 11.8s 10s
OK AeroTech G77 27.8oz 66ft/s 389ft/s 11.3G 2,108ft 11.6s 10s
OK AeroTech G77 26.3oz 71ft/s 416ft/s 13.0G 2,289ft 12.0s 11s
OK AeroTech G79 27.5oz 72ft/s 411ft/s 12.3G 2,315ft 12.1s 11s
OK Cesaroni G68 27.5oz 67ft/s 405ft/s 11.0G 2,319ft 12.2s 10s
OK Cesaroni G83 27.1oz 77ft/s 416ft/s 12.3G 2,344ft 12.1s 11s
OK Cesaroni G57 27.1oz 70ft/s 397ft/s 10.7G 2,347ft 12.3s 10s
OK AeroTech G79 26.4oz 66ft/s 416ft/s 10.4G 2,398ft 12.4s 10s
OK Cesaroni G250 27.0oz 126ft/s 467ft/s 38.4G 2,540ft 12.1s 12s
OK AeroTech G76 27.2oz 93ft/s 426ft/s 19.0G 2,601ft 12.6s 11s
OK AeroTech G64 27.3oz 83ft/s 425ft/s 13.3G 2,675ft 12.9s 10s
OK Cesaroni G126 27.1oz 92ft/s 470ft/s 20.1G 2,694ft 12.6s 12s
OK Cesaroni G131 29.1oz 90ft/s 482ft/s 19.2G 2,817ft 13.0s 12s
OK AeroTech G75 26.6oz 74ft/s 462ft/s 12.6G 2,830ft 13.2s 11s
OK AeroTech G78 26.4oz 76ft/s 481ft/s 13.1G 2,952ft 13.3s 12s
OK AeroTech G125 26.4oz 90ft/s 524ft/s 20.7G 3,113ft 13.5s 12s
OK AeroTech G80 26.5oz 80ft/s 504ft/s 13.2G 3,182ft 13.8s 12s
OK KBA G82 30.1oz 66ft/s 499ft/s 11.7G 3,234ft 14.2s 12s
OK Cesaroni G106 28.6oz 75ft/s 525ft/s 15.5G 3,256ft 14.0s 13s
OK KBA G135 30.0oz 82ft/s 539ft/s 18.8G 3,333ft 14.0s 13s
OK AeroTech G75 30.2oz 63ft/s 515ft/s 8.9G 3,473ft 14.7s 12s
OK Cesaroni G54 28.8oz 82ft/s 518ft/s 14.1G 3,908ft 15.4s 12s
OK Cesaroni G125 28.9oz 93ft/s 606ft/s 19.1G 3,965ft 15.0s 14s
OK Cesaroni G118 28.6oz 87ft/s 606ft/s 18.6G 3,982ft 15.1s 14s
OK AeroTech H165 29.1oz 101ft/s 622ft/s 23.3G 4,007ft 15.0s 14s
OK Cesaroni H54 29.4oz 72ft/s 537ft/s 11.4G 4,096ft 15.9s 12s
OK Cesaroni H133 28.7oz 98ft/s 622ft/s 23.0G 4,110ft 15.2s 14s
OK Cesaroni H87 29.2oz 78ft/s 608ft/s 14.8G 4,202ft 15.7s 14s
OK Cesaroni H90 27.7oz 89ft/s 621ft/s 19.1G 4,258ft 15.6s 14s
OK Cesaroni H163 28.6oz 105ft/s 652ft/s 26.3G 4,263ft 15.4s 14s
OK Cesaroni H410 28.4oz 162ft/s 688ft/s 67.2G 4,318ft 15.2s 15s
OK AeroTech H128 29.3oz 100ft/s 649ft/s 21.8G 4,322ft 15.5s 14s
OK AeroTech H238 28.9oz 115ft/s 674ft/s 29.5G 4,427ft 15.5s 15s
OK AeroTech G138 27.2oz 89ft/s 686ft/s 25.2G 4,451ft 15.6s 15s
OK AeroTech H115 29.2oz 82ft/s 665ft/s 14.8G 4,539ft 16.0s 14s
OK AeroTech H182 29.3oz 101ft/s 842ft/s 24.4G 5,754ft 17.3s 16s
OK AeroTech H195 28.9oz 123ft/s 924ft/s 30.6G 6,342ft 17.8s 17s
warningsW,D Estes G80 26.4oz 11:1 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 (34ft/s)
failedG AeroTech E23 speed at end of launch guide too slow (46ft/s)
failedG AeroTech E16 speed at end of launch guide too slow (38ft/s)
failedG AeroTech F27 speed at end of launch guide too slow (46ft/s)
failedG Estes F15 speed at end of launch guide too slow (31ft/s)
failedG Cesaroni F32 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni F29 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni F31 speed at end of launch guide too slow (46ft/s)
failed5 Estes F26 average thrust fails 5:1 thrust/weight ratio (4:1)
failedG AeroTech F26 speed at end of launch guide too slow (45ft/s)
failedG AeroTech F22 speed at end of launch guide too slow (39ft/s)
failedG Apogee F10 speed at end of launch guide too slow (35ft/s)
failedG AeroTech G25 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni G33 speed at end of launch guide too slow (44ft/s)

G These simulations were run with a launch guide length of 8ft (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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