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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 51 motors that fit and appear to have enough thrust (754 motors didn't fit, 6 motors failed safety checks). 57 motor had thrust curves available and 118 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:   Running With Scissors 38mm
Owner: Jim Lane
Body Diameter: 4.00in
Dry Weight: 41.0oz
MMT Diameter: 38.0mm
MMT Length: 9.00in
CD: 0.77

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 49.5oz 56ft/s 192ft/s 6.1G 578ft 6.2s 5s
OK AeroTech G61 47.8oz 51ft/s 189ft/s 5.0G 589ft 6.3s 4s
OK AeroTech G67 48.1oz 53ft/s 201ft/s 5.7G 591ft 6.3s 5s
OK AeroTech G339 47.4oz 118ft/s 259ft/s 27.6G 630ft 5.9s 5s
OK Loki G70 49.5oz 57ft/s 202ft/s 6.3G 632ft 6.5s 5s
OK Loki G80 50.0oz 61ft/s 212ft/s 7.1G 644ft 6.4s 5s
OK Loki G94 49.5oz 64ft/s 226ft/s 8.5G 673ft 6.4s 5s
OK Cesaroni G69 47.9oz 50ft/s 221ft/s 5.5G 713ft 6.9s 5s
OK Cesaroni G185 47.6oz 79ft/s 279ft/s 14.2G 727ft 6.4s 6s
OK Loki G66 49.8oz 59ft/s 220ft/s 7.4G 749ft 7.0s 5s
OK AeroTech G69 48.1oz 49ft/s 240ft/s 5.1G 771ft 7.1s 5s
OK Cesaroni G60 48.3oz 51ft/s 234ft/s 5.4G 790ft 7.2s 5s
OK Cesaroni G115 47.9oz 65ft/s 278ft/s 8.9G 815ft 6.9s 6s
OK Cesaroni G78 47.9oz 52ft/s 253ft/s 8.8G 822ft 7.2s 5s
OK Loki H100 52.8oz 64ft/s 323ft/s 8.4G 1,133ft 7.9s 6s
warningsW AeroTech H283 49.7oz 107ft/s 410ft/s 23.0G 1,134ft 7.4s 7s
OK AeroTech H148 51.9oz 78ft/s 371ft/s 12.4G 1,214ft 8.0s 6s
OK AeroTech H130 49.4oz 96ft/s 361ft/s 17.9G 1,220ft 7.8s 6s
OK AeroTech H669 49.9oz 165ft/s 491ft/s 78.9G 1,220ft 7.4s 7s
OK AeroTech H219 50.2oz 97ft/s 447ft/s 20.0G 1,320ft 7.9s 7s
OK AeroTech H123 50.7oz 67ft/s 351ft/s 9.5G 1,323ft 8.4s 6s
OK AeroTech H100 50.2oz 62ft/s 353ft/s 8.0G 1,329ft 8.5s 6s
OK Loki H144 52.9oz 91ft/s 392ft/s 15.9G 1,337ft 8.1s 7s
OK Cesaroni H123 51.5oz 62ft/s 401ft/s 9.1G 1,344ft 8.4s 6s
OK Cesaroni H143 53.2oz 65ft/s 412ft/s 9.3G 1,357ft 8.4s 7s
OK Loki H90 52.8oz 66ft/s 338ft/s 9.0G 1,359ft 8.7s 6s
OK Loki H125 53.1oz 80ft/s 373ft/s 12.9G 1,360ft 8.4s 6s
OK AeroTech H242 50.3oz 89ft/s 446ft/s 15.8G 1,382ft 8.1s 7s
OK Cesaroni H400 51.0oz 118ft/s 533ft/s 29.6G 1,387ft 7.9s 7s
OK Loki H160 52.8oz 98ft/s 423ft/s 18.7G 1,410ft 8.2s 7s
OK Cesaroni H120 51.4oz 65ft/s 416ft/s 9.3G 1,489ft 8.8s 7s
OK AeroTech H112 54.4oz 55ft/s 352ft/s 6.3G 1,502ft 9.3s 6s
OK Cesaroni H125 51.3oz 64ft/s 437ft/s 9.1G 1,514ft 8.8s 7s
OK Cesaroni H225 47.8oz 93ft/s 532ft/s 18.4G 1,516ft 8.2s 7s
OK Cesaroni H110 52.5oz 58ft/s 407ft/s 7.1G 1,532ft 9.1s 6s
OK AeroTech H178 52.4oz 72ft/s 489ft/s 12.7G 1,554ft 8.6s 7s
OK Cesaroni H152 51.5oz 75ft/s 459ft/s 13.8G 1,556ft 8.7s 7s
OK AeroTech H550 52.1oz 146ft/s 639ft/s 43.8G 1,585ft 8.1s 7s
OK AeroTech H550 52.4oz 145ft/s 631ft/s 43.3G 1,597ft 8.1s 8s
OK AeroTech H999 52.7oz 199ft/s 680ft/s 109.0G 1,597ft 8.0s 8s
OK Cesaroni H100 52.5oz 59ft/s 407ft/s 7.1G 1,630ft 9.4s 7s
OK AeroTech I218 54.1oz 94ft/s 522ft/s 18.0G 1,670ft 8.7s 7s
OK AeroTech H170 52.6oz 80ft/s 498ft/s 12.6G 1,711ft 8.9s 7s
OK AeroTech I180 54.6oz 107ft/s 480ft/s 22.9G 1,717ft 8.7s 7s
OK AeroTech I161 53.9oz 81ft/s 487ft/s 13.5G 1,767ft 9.1s 7s
OK AeroTech I245 53.9oz 112ft/s 552ft/s 26.2G 1,779ft 8.7s 7s
OK AeroTech I357 53.1oz 111ft/s 591ft/s 24.7G 1,781ft 8.7s 7s
OK AeroTech I175 53.3oz 88ft/s 487ft/s 15.9G 1,816ft 9.3s 7s
OK AeroTech I140 53.6oz 71ft/s 464ft/s 10.9G 1,833ft 9.4s 7s
OK AeroTech H45 53.9oz 49ft/s 321ft/s 4.6G 1,897ft 11.0s 5s
OK AeroTech I59 58.2oz 64ft/s 378ft/s 9.1G 2,827ft 13.4s 5s

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 (42ft/s)
failedG Cesaroni G79 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (39ft/s)
failedG AeroTech H73 speed at end of launch guide too slow (47ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (37ft/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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