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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 26 motors that fit and appear to have enough thrust (782 motors didn't fit, 3 motors failed safety checks). 29 motor had thrust curves available and 64 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 38mm
Owner: Jim Lane
Body Diameter: 4.00in
Dry Weight: 37.0oz
MMT Diameter: 38.0mm
MMT Length: 6.00in
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 Loki G69 45.5oz 58ft/s 208ft/s 6.7G 624ft 6.3s 5s
OK AeroTech G61 43.8oz 53ft/s 206ft/s 5.6G 637ft 6.5s 4s
OK AeroTech G67 44.1oz 56ft/s 218ft/s 6.3G 637ft 6.4s 5s
OK AeroTech G339 43.4oz 125ft/s 282ft/s 30.2G 663ft 5.9s 5s
OK Loki G70 45.5oz 58ft/s 218ft/s 7.0G 678ft 6.6s 5s
OK Loki G80 46.0oz 62ft/s 229ft/s 7.8G 687ft 6.4s 5s
OK Loki G94 45.5oz 68ft/s 244ft/s 9.3G 714ft 6.5s 5s
OK Cesaroni G185 43.6oz 84ft/s 303ft/s 15.5G 760ft 6.4s 6s
OK Cesaroni G79 45.0oz 50ft/s 257ft/s 6.0G 760ft 6.9s 5s
OK Cesaroni G69 43.9oz 52ft/s 238ft/s 6.1G 761ft 7.0s 5s
OK Loki G66 45.8oz 63ft/s 237ft/s 8.1G 793ft 7.0s 5s
OK AeroTech G69 44.1oz 53ft/s 259ft/s 5.5G 815ft 7.1s 5s
OK Cesaroni G60 44.3oz 53ft/s 252ft/s 6.0G 836ft 7.2s 5s
OK Cesaroni G115 43.9oz 66ft/s 300ft/s 9.8G 850ft 6.9s 6s
OK Cesaroni G78 43.9oz 53ft/s 272ft/s 9.7G 864ft 7.2s 5s
OK AeroTech H73 47.9oz 50ft/s 287ft/s 5.2G 1,093ft 8.2s 5s
warningsW AeroTech H283 45.7oz 111ft/s 439ft/s 25.0G 1,139ft 7.2s 6s
OK AeroTech H669 45.9oz 174ft/s 530ft/s 85.9G 1,210ft 7.2s 7s
OK AeroTech H148 47.9oz 81ft/s 392ft/s 13.5G 1,226ft 7.8s 6s
OK AeroTech H130 45.4oz 99ft/s 381ft/s 19.6G 1,227ft 7.6s 6s
OK AeroTech H219 46.2oz 106ft/s 474ft/s 21.8G 1,315ft 7.7s 7s
OK AeroTech H123 46.7oz 70ft/s 369ft/s 10.4G 1,336ft 8.3s 6s
OK AeroTech H100 46.2oz 63ft/s 371ft/s 8.7G 1,343ft 8.3s 6s
OK AeroTech H242 46.3oz 92ft/s 471ft/s 17.2G 1,376ft 7.9s 7s
OK Loki H90 48.8oz 69ft/s 354ft/s 9.8G 1,377ft 8.5s 6s
OK Loki H160 48.8oz 100ft/s 446ft/s 20.3G 1,406ft 8.0s 6s

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

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 Cesaroni G46 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (41ft/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.)

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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