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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 36 motors that fit and appear to have enough thrust (767 motors didn't fit, 8 motors failed safety checks). 42 motor had thrust curves available and 79 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:   Brother Jack 12302019
Owner: Kenneth B Weaver
Body Diameter: 2.60in
Dry Weight: 11.5oz
MMT Diameter: 29.0mm
MMT Length: 5.00in
CD: 0.75

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 15.2oz 52ft/s 195ft/s 8.1G 552ft 5.9s 4s
OK Cesaroni F36 15.2oz 55ft/s 279ft/s 17.8G 682ft 6.1s 5s
OK AeroTech F27 14.3oz 50ft/s 264ft/s 7.9G 847ft 6.9s 4s
OK Cesaroni F36 15.1oz 52ft/s 308ft/s 9.1G 858ft 6.8s 5s
OK AeroTech F62 15.3oz 64ft/s 337ft/s 13.9G 873ft 6.7s 6s
OK Cesaroni F120 15.2oz 94ft/s 394ft/s 31.9G 883ft 6.5s 6s
OK AeroTech F23 14.4oz 55ft/s 275ft/s 11.2G 903ft 7.0s 5s
OK Cesaroni F31 15.1oz 51ft/s 309ft/s 12.3G 919ft 7.0s 5s
OK Cesaroni F59 15.0oz 68ft/s 366ft/s 16.0G 927ft 6.8s 6s
OK AeroTech F42 14.2oz 70ft/s 337ft/s 16.4G 936ft 6.8s 5s
OK AeroTech F20 14.3oz 57ft/s 290ft/s 11.1G 986ft 7.2s 5s
OK AeroTech F67 14.3oz 79ft/s 416ft/s 20.3G 993ft 6.7s 6s
OK AeroTech F26 15.1oz 50ft/s 298ft/s 8.1G 1,046ft 7.6s 5s
OK AeroTech F50 14.5oz 73ft/s 412ft/s 17.0G 1,094ft 7.1s 6s
OK AeroTech F52 15.8oz 75ft/s 396ft/s 16.9G 1,135ft 7.3s 6s
OK AeroTech F25 14.7oz 63ft/s 335ft/s 13.1G 1,175ft 7.6s 5s
OK Estes F50 14.5oz 76ft/s 439ft/s 18.0G 1,195ft 7.3s 6s
OK AeroTech F40 16.0oz 65ft/s 374ft/s 14.2G 1,221ft 7.7s 6s
OK AeroTech G54 16.3oz 71ft/s 419ft/s 16.6G 1,222ft 7.5s 6s
OK AeroTech G104 16.3oz 92ft/s 492ft/s 25.9G 1,238ft 7.3s 6s
OK AeroTech G74 14.6oz 79ft/s 528ft/s 20.5G 1,267ft 7.3s 6s
OK AeroTech G53 16.6oz 76ft/s 435ft/s 17.7G 1,348ft 7.8s 6s
OK AeroTech G38 15.9oz 58ft/s 381ft/s 10.9G 1,358ft 8.1s 5s
OK AeroTech G77 15.8oz 72ft/s 569ft/s 19.3G 1,416ft 7.6s 6s
OK Estes G40 15.8oz 71ft/s 444ft/s 15.6G 1,474ft 8.1s 6s
OK AeroTech G40 15.8oz 71ft/s 443ft/s 15.6G 1,475ft 8.1s 6s
OK AeroTech G79 15.9oz 66ft/s 532ft/s 16.4G 1,496ft 8.0s 6s
OK AeroTech G76 16.7oz 99ft/s 523ft/s 31.5G 1,566ft 7.9s 6s
OK AeroTech G125 15.9oz 98ft/s 714ft/s 30.3G 1,580ft 7.6s 7s
OK AeroTech G78 15.9oz 78ft/s 613ft/s 21.3G 1,617ft 7.9s 6s
OK AeroTech G64 16.8oz 84ft/s 513ft/s 22.2G 1,628ft 8.2s 6s
OK AeroTech G80 16.0oz 83ft/s 620ft/s 22.4G 1,680ft 8.0s 6s
OK AeroTech G25 15.8oz 50ft/s 392ft/s 8.6G 1,814ft 9.5s 5s
OK AeroTech G138 16.7oz 97ft/s 871ft/s 30.8G 1,883ft 8.1s 7s
warningsD Estes F26 15.1oz 6:1 thrust/weight ratio (no data)
warningsD Estes G80 16.0oz 17:1 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 (41ft/s)
failedG AeroTech E16 speed at end of launch guide too slow (43ft/s)
failedG Estes F15 speed at end of launch guide too slow (38ft/s)
failedG AeroTech F37 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni F32 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni F29 speed at end of launch guide too slow (44ft/s)
failedG AeroTech F22 speed at end of launch guide too slow (41ft/s)
failedG Apogee F10 speed at end of launch guide too slow (43ft/s)

G These simulations were run with a launch guide length of 5ft (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.)

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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