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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 31 motors that fit and appear to have enough thrust (738 motors didn't fit, 22 motors failed safety checks). 51 motor had thrust curves available and 94 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:   Plasma Fart 29mm
Owner: Jim Lane
Body Diameter: 4.00in
Dry Weight: 38.0oz
MMT Diameter: 29.0mm
MMT Length: 7.00in
CD: 0.80

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 F42 40.7oz 48ft/s 112ft/s 5.1G 251ft 4.3s 3s
OK Cesaroni F59 41.5oz 50ft/s 125ft/s 5.1G 257ft 4.3s 3s
OK Cesaroni F120 41.7oz 74ft/s 139ft/s 11.3G 259ft 4.1s 4s
OK AeroTech F50 41.0oz 51ft/s 145ft/s 5.4G 351ft 4.9s 3s
OK AeroTech F52 42.3oz 53ft/s 146ft/s 5.7G 369ft 5.1s 4s
warningsW Estes F50 40.9oz 53ft/s 160ft/s 5.9G 416ft 5.3s 4s
OK AeroTech G54 42.8oz 54ft/s 160ft/s 5.8G 424ft 5.4s 4s
OK Cesaroni G88 43.4oz 59ft/s 187ft/s 8.7G 452ft 5.4s 4s
OK AeroTech G104 42.8oz 69ft/s 191ft/s 9.2G 470ft 5.4s 4s
OK AeroTech G74 41.1oz 58ft/s 193ft/s 6.9G 481ft 5.6s 4s
OK AeroTech G53 43.1oz 54ft/s 172ft/s 6.2G 505ft 5.9s 4s
OK Cesaroni G80 43.1oz 55ft/s 206ft/s 7.2G 530ft 5.8s 5s
warningsW Estes G40 42.3oz 48ft/s 176ft/s 5.2G 565ft 6.3s 4s
OK AeroTech G40 42.3oz 48ft/s 176ft/s 5.2G 565ft 6.3s 4s
OK AeroTech G77 43.8oz 52ft/s 213ft/s 6.3G 574ft 6.1s 5s
OK AeroTech G77 42.3oz 55ft/s 222ft/s 7.2G 593ft 6.1s 5s
OK AeroTech G79 43.5oz 58ft/s 221ft/s 7.1G 618ft 6.2s 5s
OK AeroTech G79 42.4oz 51ft/s 214ft/s 5.8G 621ft 6.4s 4s
OK Cesaroni G68 43.5oz 51ft/s 212ft/s 6.6G 621ft 6.3s 5s
OK Cesaroni G83 43.1oz 59ft/s 225ft/s 7.4G 622ft 6.2s 5s
OK Cesaroni G57 43.1oz 54ft/s 201ft/s 6.3G 628ft 6.4s 4s
OK Cesaroni G250 43.0oz 101ft/s 275ft/s 22.8G 650ft 5.9s 5s
OK AeroTech G76 43.2oz 72ft/s 221ft/s 11.5G 685ft 6.4s 4s
OK Cesaroni G126 43.1oz 72ft/s 263ft/s 12.3G 690ft 6.2s 5s
OK AeroTech G64 43.3oz 62ft/s 216ft/s 8.0G 705ft 6.6s 4s
OK AeroTech G75 42.6oz 59ft/s 237ft/s 7.5G 720ft 6.6s 5s
OK AeroTech G78 42.4oz 59ft/s 251ft/s 7.5G 735ft 6.6s 5s
OK AeroTech G125 42.4oz 70ft/s 288ft/s 11.4G 758ft 6.4s 5s
OK AeroTech G80 42.5oz 61ft/s 260ft/s 7.8G 784ft 6.8s 5s
OK AeroTech G138 43.2oz 70ft/s 373ft/s 12.9G 1,005ft 7.2s 6s
warningsW,D Estes G80 42.4oz 7:1 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 (20ft/s)
failedG AeroTech E23 speed at end of launch guide too slow (33ft/s)
failedG AeroTech E16 speed at end of launch guide too slow (25ft/s)
failedG AeroTech F23 speed at end of launch guide too slow (35ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (36ft/s)
failedG AeroTech F27 speed at end of launch guide too slow (33ft/s)
failedG Estes F15 speed at end of launch guide too slow (16ft/s)
failedG AeroTech F37 speed at end of launch guide too slow (38ft/s)
failedG AeroTech F62 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (37ft/s)
failedG AeroTech F20 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni F32 speed at end of launch guide too slow (32ft/s)
failedG Cesaroni F29 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni F31 speed at end of launch guide too slow (33ft/s)
failed5 Estes F26 average thrust fails 5:1 thrust/weight ratio (2:1)
failedG AeroTech F26 speed at end of launch guide too slow (32ft/s)
failedG AeroTech F22 speed at end of launch guide too slow (28ft/s)
failedG Apogee F10 speed at end of launch guide too slow (20ft/s)
failedG AeroTech F25 speed at end of launch guide too slow (43ft/s)
failedG AeroTech F40 speed at end of launch guide too slow (47ft/s)
failedG AeroTech G38 speed at end of launch guide too slow (39ft/s)
failedG AeroTech G25 speed at end of launch guide too slow (35ft/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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