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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 50 motors that fit and appear to have enough thrust (757 motors didn't fit, 4 motors failed safety checks). 54 motor had thrust curves available and 114 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:   MadCow Cowabunga 4-inch
Owner: David Cain
Body Diameter: 4.00in
Dry Weight: 1,137g
MMT Diameter: 38.0mm
MMT Length: 20.3cm
CD: 0.40
Web Site:

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 1,377g 56ft/s 206ft/s 6.3G 707ft 6.9s 5s
OK AeroTech G61 1,331g 50ft/s 204ft/s 5.2G 724ft 7.1s 5s
OK AeroTech G67 1,338g 53ft/s 215ft/s 5.9G 729ft 7.1s 6s
OK Loki G70 1,379g 58ft/s 218ft/s 6.5G 783ft 7.3s 6s
OK Loki G80 1,392g 60ft/s 227ft/s 7.2G 801ft 7.2s 6s
OK AeroTech G339 1,318g 120ft/s 268ft/s 28.2G 805ft 6.8s 6s
OK Loki G94 1,377g 66ft/s 242ft/s 8.8G 847ft 7.3s 6s
OK Cesaroni G69 1,334g 51ft/s 240ft/s 5.6G 899ft 7.9s 6s
OK Cesaroni G79 1,363g 48ft/s 255ft/s 6.0G 908ft 7.9s 6s
OK Cesaroni G185 1,325g 81ft/s 291ft/s 14.8G 944ft 7.4s 7s
OK Loki G66 1,387g 61ft/s 240ft/s 7.5G 948ft 8.0s 6s
OK AeroTech G69 1,338g 50ft/s 260ft/s 5.3G 985ft 8.1s 6s
OK Cesaroni G60 1,343g 52ft/s 257ft/s 5.5G 1,008ft 8.3s 6s
OK Cesaroni G78 1,334g 53ft/s 276ft/s 9.0G 1,062ft 8.3s 6s
OK Cesaroni G115 1,332g 64ft/s 298ft/s 9.1G 1,064ft 8.1s 7s
OK AeroTech H73 1,446g 48ft/s 303ft/s 5.1G 1,386ft 9.7s 7s
OK Loki H100 1,472g 65ft/s 355ft/s 9.0G 1,529ft 9.5s 8s
warningsW AeroTech H283 1,384g 109ft/s 436ft/s 23.7G 1,589ft 9.1s 8s
OK AeroTech H148 1,446g 78ft/s 410ft/s 12.7G 1,679ft 9.6s 8s
OK AeroTech H130 1,374g 92ft/s 403ft/s 18.3G 1,700ft 9.5s 8s
OK AeroTech H669 1,389g 169ft/s 512ft/s 80.3G 1,756ft 9.2s 9s
OK AeroTech H123 1,412g 68ft/s 398ft/s 9.8G 1,832ft 10.2s 8s
OK AeroTech H100 1,398g 61ft/s 404ft/s 8.4G 1,842ft 10.3s 8s
OK Loki H90 1,472g 68ft/s 386ft/s 9.2G 1,864ft 10.5s 8s
OK Loki H144 1,473g 88ft/s 435ft/s 16.2G 1,872ft 10.0s 8s
OK Cesaroni H123 1,434g 61ft/s 445ft/s 9.4G 1,875ft 10.3s 8s
OK AeroTech H219 1,398g 99ft/s 488ft/s 20.4G 1,882ft 9.8s 9s
OK Loki H125 1,479g 81ft/s 419ft/s 13.2G 1,892ft 10.2s 8s
OK Cesaroni H143 1,484g 63ft/s 457ft/s 10.0G 1,902ft 10.3s 9s
OK AeroTech H242 1,401g 88ft/s 492ft/s 16.3G 1,971ft 10.1s 9s
OK Loki H160 1,472g 99ft/s 470ft/s 19.0G 1,999ft 10.1s 9s
OK Cesaroni H400 1,421g 115ft/s 566ft/s 31.0G 2,021ft 9.9s 9s
OK AeroTech H112 1,516g 56ft/s 409ft/s 6.4G 2,071ft 11.2s 8s
OK Cesaroni H120 1,432g 67ft/s 474ft/s 9.6G 2,103ft 10.7s 9s
OK Cesaroni H125 1,430g 63ft/s 494ft/s 9.6G 2,150ft 10.8s 9s
OK Cesaroni H110 1,462g 59ft/s 465ft/s 7.5G 2,150ft 11.0s 8s
OK Cesaroni H225 1,330g 95ft/s 592ft/s 18.8G 2,225ft 10.4s 9s
OK Cesaroni H152 1,435g 76ft/s 519ft/s 14.1G 2,229ft 10.8s 9s
OK AeroTech H178 1,461g 73ft/s 547ft/s 13.8G 2,242ft 10.7s 9s
OK Cesaroni H100 1,464g 60ft/s 475ft/s 7.2G 2,294ft 11.4s 9s
OK AeroTech H550 1,453g 149ft/s 684ft/s 45.1G 2,377ft 10.3s 10s
OK AeroTech H999 1,468g 195ft/s 713ft/s 110.9G 2,410ft 10.3s 10s
OK AeroTech I218 1,509g 95ft/s 587ft/s 18.4G 2,435ft 10.9s 9s
OK AeroTech H170 1,467g 78ft/s 571ft/s 13.0G 2,479ft 11.1s 9s
OK AeroTech I180 1,522g 109ft/s 547ft/s 23.3G 2,489ft 11.0s 9s
OK AeroTech I161 1,503g 81ft/s 562ft/s 13.8G 2,560ft 11.3s 9s
OK AeroTech H45 1,502g 49ft/s 384ft/s 4.8G 2,607ft 13.0s 7s
OK AeroTech I245 1,502g 114ft/s 630ft/s 27.1G 2,631ft 11.0s 10s
OK AeroTech I357 1,480g 111ft/s 664ft/s 25.2G 2,644ft 11.0s 10s
OK AeroTech I140 1,493g 73ft/s 549ft/s 11.3G 2,646ft 11.6s 9s

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 (43ft/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 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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