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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 90 motors that fit and appear to have enough thrust (696 motors didn't fit, 17 motors failed safety checks). 107 motor had thrust curves available and 231 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 3inch DD Twitch
Owner: Kenneth B Weaver
Body Diameter: 3.00in
Dry Weight: 56.0oz
MMT Diameter: 38.0mm
MMT Length: 14.00in
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 Loki G80 65.0oz 50ft/s 165ft/s 5.2G 513ft 6.1s 5s
OK AeroTech G339 62.4oz 100ft/s 197ft/s 20.7G 533ft 5.7s 5s
OK Loki G94 64.5oz 53ft/s 176ft/s 6.4G 550ft 6.2s 5s
OK Loki G66 64.8oz 50ft/s 174ft/s 5.4G 618ft 6.8s 5s
OK Cesaroni G185 62.6oz 68ft/s 213ft/s 10.9G 634ft 6.4s 6s
OK Cesaroni G115 62.9oz 54ft/s 217ft/s 6.5G 718ft 7.0s 6s
OK Loki H100 67.8oz 54ft/s 269ft/s 6.8G 1,134ft 8.6s 7s
warningsW AeroTech H283 64.7oz 89ft/s 329ft/s 17.7G 1,225ft 8.4s 8s
OK AeroTech H148 66.9oz 66ft/s 312ft/s 9.4G 1,286ft 8.9s 7s
OK AeroTech H130 64.4oz 80ft/s 308ft/s 13.5G 1,313ft 8.9s 7s
OK AeroTech H669 64.9oz 140ft/s 385ft/s 60.4G 1,409ft 8.7s 8s
OK AeroTech H123 65.7oz 57ft/s 305ft/s 7.2G 1,411ft 9.5s 7s
OK AeroTech H100 65.2oz 52ft/s 309ft/s 6.2G 1,414ft 9.6s 7s
OK Loki H90 67.8oz 56ft/s 298ft/s 6.8G 1,429ft 9.7s 7s
OK Cesaroni H123 66.5oz 52ft/s 338ft/s 7.1G 1,459ft 9.7s 8s
OK Loki H144 67.9oz 77ft/s 337ft/s 12.2G 1,481ft 9.4s 8s
OK Loki H125 68.1oz 66ft/s 325ft/s 9.8G 1,485ft 9.6s 8s
OK Cesaroni H143 68.2oz 55ft/s 349ft/s 7.6G 1,496ft 9.7s 8s
OK AeroTech H219 65.2oz 83ft/s 375ft/s 15.2G 1,513ft 9.3s 8s
OK AeroTech H242 65.3oz 74ft/s 377ft/s 12.1G 1,588ft 9.6s 8s
OK Loki H160 67.8oz 84ft/s 366ft/s 14.3G 1,615ft 9.6s 8s
OK Cesaroni H400 66.0oz 99ft/s 429ft/s 23.3G 1,670ft 9.5s 9s
OK Cesaroni H120 66.4oz 55ft/s 365ft/s 7.0G 1,681ft 10.3s 8s
OK Cesaroni H110 67.5oz 50ft/s 359ft/s 5.6G 1,713ft 10.5s 8s
OK Cesaroni H125 66.3oz 54ft/s 380ft/s 7.2G 1,733ft 10.4s 8s
OK Cesaroni H152 66.5oz 65ft/s 402ft/s 10.5G 1,832ft 10.4s 9s
OK Cesaroni H100 67.5oz 50ft/s 370ft/s 5.3G 1,845ft 11.0s 8s
OK AeroTech H178 67.4oz 62ft/s 423ft/s 10.5G 1,863ft 10.4s 9s
OK Cesaroni H225 62.8oz 78ft/s 449ft/s 13.8G 1,871ft 10.2s 9s
OK AeroTech H550 67.4oz 124ft/s 518ft/s 33.8G 2,076ft 10.3s 10s
OK AeroTech I218 69.1oz 80ft/s 462ft/s 13.9G 2,077ft 10.7s 9s
OK AeroTech H550 67.1oz 125ft/s 524ft/s 34.1G 2,081ft 10.3s 10s
warningsW Cesaroni H565 68.8oz 123ft/s 526ft/s 32.7G 2,100ft 10.4s 10s
OK AeroTech H170 67.6oz 67ft/s 449ft/s 9.9G 2,105ft 10.9s 9s
OK AeroTech H999 67.7oz 166ft/s 545ft/s 84.5G 2,117ft 10.2s 10s
OK AeroTech I180 69.6oz 94ft/s 437ft/s 17.8G 2,128ft 10.8s 9s
OK AeroTech I161 68.9oz 68ft/s 447ft/s 10.4G 2,187ft 11.1s 9s
OK Cesaroni I180 69.9oz 63ft/s 476ft/s 9.8G 2,218ft 11.2s 9s
OK AeroTech I140 68.6oz 62ft/s 440ft/s 8.4G 2,252ft 11.4s 9s
OK AeroTech I225 73.1oz 70ft/s 491ft/s 12.6G 2,303ft 11.2s 9s
OK AeroTech I245 68.9oz 93ft/s 502ft/s 20.6G 2,308ft 11.0s 10s
OK AeroTech I357 68.1oz 94ft/s 522ft/s 19.1G 2,327ft 11.0s 10s
OK Cesaroni I212 72.8oz 67ft/s 508ft/s 11.6G 2,347ft 11.4s 10s
OK Cesaroni I566 69.6oz 116ft/s 600ft/s 31.2G 2,433ft 10.9s 10s
OK AeroTech I154 73.4oz 56ft/s 445ft/s 7.3G 2,469ft 12.2s 9s
OK Cesaroni I195 70.7oz 68ft/s 536ft/s 11.1G 2,606ft 11.9s 10s
OK Cesaroni I345 69.9oz 92ft/s 602ft/s 19.1G 2,625ft 11.5s 10s
OK AeroTech I285 73.4oz 87ft/s 576ft/s 17.6G 2,656ft 11.7s 10s
OK Cesaroni I800 72.1oz 138ft/s 666ft/s 44.0G 2,670ft 11.3s 11s
OK Cesaroni I170 69.8oz 67ft/s 548ft/s 10.6G 2,687ft 12.1s 10s
OK Cesaroni I175 71.4oz 64ft/s 537ft/s 8.7G 2,699ft 12.2s 10s
OK AeroTech I1299 70.9oz 183ft/s 695ft/s 77.1G 2,723ft 11.2s 11s
OK Cesaroni I236 70.1oz 78ft/s 577ft/s 15.0G 2,734ft 11.9s 10s
OK AeroTech I305 76.5oz 91ft/s 589ft/s 18.4G 2,763ft 11.8s 10s
OK AeroTech I211 72.0oz 81ft/s 560ft/s 15.0G 2,801ft 12.0s 10s
OK Cesaroni I223 73.4oz 70ft/s 583ft/s 11.5G 2,804ft 12.1s 10s
OK AeroTech I195 76.2oz 83ft/s 553ft/s 16.1G 2,813ft 12.1s 10s
OK AeroTech I300 71.6oz 95ft/s 608ft/s 22.4G 2,821ft 11.8s 10s
OK Loki I316 75.0oz 105ft/s 625ft/s 23.1G 2,982ft 12.0s 11s
OK Cesaroni I287 77.3oz 78ft/s 648ft/s 15.0G 3,056ft 12.4s 11s
warningsW Loki I110 76.8oz 59ft/s 504ft/s 11.4G 3,095ft 13.3s 9s
OK Loki I405 75.2oz 132ft/s 679ft/s 37.5G 3,107ft 12.1s 11s
OK Loki I210 75.0oz 91ft/s 595ft/s 20.2G 3,121ft 12.5s 10s
OK Cesaroni I285 73.8oz 84ft/s 675ft/s 16.2G 3,232ft 12.6s 11s
OK Loki I377 75.8oz 119ft/s 689ft/s 30.3G 3,261ft 12.4s 11s
OK Loki I430 75.0oz 104ft/s 738ft/s 24.5G 3,274ft 12.4s 11s
OK Cesaroni I255 74.2oz 79ft/s 669ft/s 14.4G 3,281ft 12.8s 11s
OK AeroTech I327 78.2oz 92ft/s 706ft/s 18.9G 3,318ft 12.6s 11s
OK AeroTech I366 75.6oz 102ft/s 720ft/s 22.3G 3,328ft 12.5s 11s
OK AeroTech I364 79.9oz 89ft/s 700ft/s 17.9G 3,335ft 12.6s 11s
OK AMW I297 76.8oz 88ft/s 699ft/s 16.5G 3,341ft 12.7s 11s
OK AeroTech I59 73.2oz 56ft/s 340ft/s 7.3G 3,343ft 15.3s 7s
OK Cesaroni I470 73.5oz 112ft/s 776ft/s 26.3G 3,359ft 12.4s 11s
OK Cesaroni I303 73.6oz 89ft/s 713ft/s 19.2G 3,396ft 12.7s 11s
OK AeroTech I280 77.7oz 83ft/s 708ft/s 14.6G 3,440ft 12.9s 11s
OK Cesaroni I242 75.4oz 76ft/s 687ft/s 12.6G 3,461ft 13.1s 11s
OK AeroTech I435 74.3oz 126ft/s 783ft/s 35.6G 3,498ft 12.5s 11s
OK Cesaroni I350 83.6oz 87ft/s 740ft/s 16.3G 3,554ft 13.1s 11s
OK AeroTech I284 75.6oz 99ft/s 747ft/s 22.2G 3,589ft 12.9s 11s
OK AeroTech I500 76.3oz 108ft/s 845ft/s 26.2G 3,725ft 12.9s 12s
OK AeroTech I600 77.2oz 128ft/s 868ft/s 37.3G 3,769ft 12.8s 12s
OK AeroTech I350 77.7oz 95ft/s 840ft/s 21.7G 3,838ft 13.2s 12s
OK AeroTech J420 78.9oz 104ft/s 830ft/s 24.5G 3,839ft 13.2s 12s
OK AeroTech J350 79.5oz 122ft/s 829ft/s 36.3G 3,843ft 13.0s 11s
OK AeroTech J340 76.4oz 107ft/s 820ft/s 27.3G 3,869ft 13.1s 11s
OK Cesaroni J357 77.2oz 95ft/s 836ft/s 23.0G 3,924ft 13.3s 11s
OK Cesaroni J285 77.0oz 86ft/s 785ft/s 16.1G 3,927ft 13.5s 11s
OK AeroTech J425 78.3oz 89ft/s 891ft/s 19.7G 3,999ft 13.4s 12s
OK AeroTech J500 79.1oz 127ft/s 920ft/s 35.1G 4,138ft 13.3s 12s
OK AeroTech J270 78.6oz 85ft/s 807ft/s 15.4G 4,164ft 13.8s 11s

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 AeroTech G67 speed at end of launch guide too slow (44ft/s)
failedG Loki G69 speed at end of launch guide too slow (45ft/s)
failedG AeroTech G61 speed at end of launch guide too slow (42ft/s)
failedG Loki G70 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni G69 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni G46 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni G79 speed at end of launch guide too slow (39ft/s)
failedG Cesaroni G60 speed at end of launch guide too slow (42ft/s)
failedG AeroTech G69 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni G78 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (31ft/s)
failedG AeroTech H73 speed at end of launch guide too slow (39ft/s)
failedG AeroTech H112 speed at end of launch guide too slow (46ft/s)
failedG AeroTech H45 speed at end of launch guide too slow (41ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni I55 speed at end of launch guide too slow (33ft/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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