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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 114 motors that fit and appear to have enough thrust (672 motors didn't fit, 5 motors failed safety checks). 119 motor had thrust curves available and 252 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 SportX-3.1inch-38mmMMT
Owner: Kenneth B Weaver
Body Diameter: 3.10in
Dry Weight: 32.0oz
MMT Diameter: 38.0mm
MMT Length: 15.00in
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 G69 40.5oz 61ft/s 248ft/s 7.7G 858ft 7.3s 6s
OK AeroTech G61 38.8oz 55ft/s 247ft/s 6.4G 883ft 7.5s 5s
OK AeroTech G67 39.1oz 58ft/s 261ft/s 7.3G 884ft 7.5s 6s
OK AeroTech G339 38.4oz 127ft/s 324ft/s 34.4G 928ft 7.0s 7s
OK Loki G70 40.5oz 62ft/s 260ft/s 8.0G 936ft 7.7s 6s
OK Loki G80 41.0oz 65ft/s 270ft/s 8.9G 948ft 7.5s 6s
OK Loki G94 40.5oz 70ft/s 288ft/s 10.7G 989ft 7.6s 6s
OK Cesaroni G69 38.9oz 54ft/s 288ft/s 7.0G 1,061ft 8.2s 6s
OK Cesaroni G79 40.0oz 51ft/s 306ft/s 7.1G 1,061ft 8.1s 6s
OK Cesaroni G185 38.6oz 84ft/s 352ft/s 17.9G 1,069ft 7.6s 7s
OK Loki G66 40.8oz 66ft/s 284ft/s 9.2G 1,099ft 8.2s 6s
OK AeroTech G69 39.1oz 55ft/s 311ft/s 6.5G 1,139ft 8.3s 6s
OK Cesaroni G60 39.3oz 55ft/s 305ft/s 6.9G 1,166ft 8.5s 6s
OK Cesaroni G115 38.9oz 69ft/s 355ft/s 11.2G 1,195ft 8.2s 7s
OK Cesaroni G78 38.9oz 55ft/s 328ft/s 11.1G 1,210ft 8.5s 7s
OK AeroTech H73 42.9oz 52ft/s 350ft/s 6.1G 1,524ft 9.6s 7s
OK Loki H100 43.8oz 70ft/s 408ft/s 10.5G 1,621ft 9.3s 7s
warningsW AeroTech H283 40.7oz 112ft/s 513ft/s 28.5G 1,628ft 8.7s 8s
OK AeroTech H148 42.9oz 84ft/s 470ft/s 15.2G 1,735ft 9.3s 8s
OK AeroTech H130 40.4oz 98ft/s 460ft/s 22.1G 1,740ft 9.1s 7s
OK AeroTech H669 40.9oz 176ft/s 609ft/s 96.5G 1,748ft 8.8s 8s
OK AeroTech H219 41.2oz 105ft/s 570ft/s 24.7G 1,869ft 9.2s 8s
OK AeroTech H123 41.7oz 72ft/s 450ft/s 11.8G 1,884ft 9.8s 7s
OK AeroTech H100 41.2oz 66ft/s 455ft/s 10.0G 1,896ft 9.9s 8s
OK Loki H144 43.9oz 94ft/s 493ft/s 19.4G 1,899ft 9.5s 8s
OK Cesaroni H123 42.5oz 66ft/s 509ft/s 11.3G 1,915ft 9.8s 8s
OK Cesaroni H143 44.2oz 67ft/s 521ft/s 11.7G 1,930ft 9.8s 8s
OK Loki H125 44.1oz 83ft/s 472ft/s 15.8G 1,932ft 9.8s 8s
OK Loki H90 43.8oz 72ft/s 433ft/s 11.0G 1,933ft 10.1s 8s
OK AeroTech H242 41.3oz 95ft/s 564ft/s 19.6G 1,966ft 9.5s 8s
OK Cesaroni H400 42.0oz 124ft/s 664ft/s 36.8G 1,977ft 9.3s 9s
OK Loki H160 43.8oz 105ft/s 532ft/s 22.7G 2,000ft 9.6s 8s
OK Cesaroni H120 42.4oz 70ft/s 532ft/s 11.5G 2,112ft 10.2s 8s
OK AeroTech H112 45.4oz 59ft/s 453ft/s 7.7G 2,124ft 10.7s 7s
OK Cesaroni H225 38.8oz 102ft/s 680ft/s 22.9G 2,146ft 9.6s 8s
OK Cesaroni H125 42.3oz 67ft/s 557ft/s 11.4G 2,149ft 10.2s 8s
OK Cesaroni H110 43.5oz 64ft/s 521ft/s 8.9G 2,169ft 10.5s 8s
OK AeroTech H178 43.4oz 76ft/s 620ft/s 15.9G 2,195ft 10.0s 8s
OK Cesaroni H152 42.5oz 79ft/s 584ft/s 17.0G 2,201ft 10.1s 8s
OK AeroTech H550 43.1oz 158ft/s 795ft/s 53.7G 2,241ft 9.5s 9s
OK AeroTech H550 43.4oz 157ft/s 783ft/s 53.0G 2,263ft 9.6s 9s
OK AeroTech H999 43.7oz 213ft/s 837ft/s 131.7G 2,267ft 9.5s 9s
warningsW Cesaroni H565 44.8oz 148ft/s 795ft/s 49.2G 2,283ft 9.7s 9s
OK Cesaroni H100 43.5oz 65ft/s 524ft/s 8.8G 2,303ft 10.8s 8s
OK AeroTech I218 45.1oz 99ft/s 657ft/s 21.9G 2,353ft 10.2s 9s
OK AeroTech H170 43.6oz 85ft/s 634ft/s 15.5G 2,403ft 10.3s 8s
OK AeroTech I180 45.6oz 112ft/s 604ft/s 27.7G 2,411ft 10.3s 8s
OK AeroTech I161 44.9oz 86ft/s 618ft/s 16.4G 2,479ft 10.5s 8s
OK Cesaroni I180 45.9oz 78ft/s 674ft/s 14.8G 2,494ft 10.6s 9s
OK AeroTech I245 44.9oz 116ft/s 695ft/s 32.0G 2,498ft 10.2s 9s
OK AeroTech I357 44.1oz 119ft/s 743ft/s 30.0G 2,503ft 10.1s 9s
OK Cesaroni I566 45.6oz 143ft/s 894ft/s 47.7G 2,529ft 10.0s 9s
OK AeroTech I225 49.1oz 83ft/s 681ft/s 18.5G 2,533ft 10.5s 9s
OK AeroTech I140 44.6oz 75ft/s 595ft/s 13.4G 2,570ft 10.8s 8s
OK Cesaroni I212 48.8oz 81ft/s 707ft/s 16.7G 2,580ft 10.7s 9s
OK AeroTech H45 44.9oz 52ft/s 418ft/s 5.8G 2,670ft 12.5s 6s
OK Cesaroni I800 48.1oz 170ft/s 985ft/s 63.9G 2,685ft 10.2s 10s
OK AeroTech I1299 46.9oz 231ft/s 1,039ft/s 116.6G 2,691ft 10.0s 10s
OK Cesaroni I345 45.9oz 116ft/s 853ft/s 29.6G 2,729ft 10.4s 9s
OK AeroTech I285 49.4oz 105ft/s 789ft/s 26.6G 2,789ft 10.7s 9s
OK Cesaroni I195 46.7oz 86ft/s 725ft/s 17.2G 2,806ft 11.0s 9s
OK AeroTech I154 49.4oz 69ft/s 586ft/s 11.2G 2,818ft 11.6s 8s
OK AeroTech I305 52.5oz 111ft/s 795ft/s 27.1G 2,839ft 10.7s 9s
OK Cesaroni I236 46.1oz 96ft/s 787ft/s 23.3G 2,860ft 10.8s 9s
OK Cesaroni I170 45.8oz 84ft/s 744ft/s 16.7G 2,874ft 11.1s 9s
OK AeroTech I300 47.6oz 119ft/s 827ft/s 34.2G 2,893ft 10.7s 9s
OK Cesaroni I175 47.4oz 79ft/s 721ft/s 13.4G 2,904ft 11.2s 9s
OK AeroTech I211 48.0oz 99ft/s 742ft/s 23.0G 2,927ft 10.9s 9s
OK Cesaroni I223 49.4oz 87ft/s 788ft/s 17.5G 2,932ft 11.1s 9s
OK KBA I550 57.1oz 131ft/s 1,190ft/s 43.7G 2,948ft 10.0s 9s
OK AeroTech I195 52.2oz 102ft/s 727ft/s 24.0G 2,957ft 11.1s 9s
OK Loki I316 51.0oz 124ft/s 833ft/s 34.3G 3,031ft 10.9s 9s
OK Loki I405 51.2oz 164ft/s 913ft/s 55.7G 3,076ft 10.8s 10s
OK Cesaroni I287 53.3oz 95ft/s 864ft/s 21.1G 3,096ft 11.2s 9s
OK KBA I301 57.6oz 98ft/s 973ft/s 25.2G 3,121ft 10.5s 9s
OK Loki I210 51.0oz 112ft/s 774ft/s 30.2G 3,209ft 11.3s 9s
OK Cesaroni I285 49.8oz 100ft/s 889ft/s 24.5G 3,225ft 11.2s 9s
OK Loki I430 51.0oz 124ft/s 1,003ft/s 36.5G 3,226ft 11.1s 10s
OK Loki I377 51.8oz 139ft/s 905ft/s 44.8G 3,228ft 11.1s 10s
OK Cesaroni I470 49.5oz 133ft/s 1,058ft/s 39.6G 3,234ft 10.9s 10s
OK AeroTech I366 51.6oz 123ft/s 946ft/s 33.2G 3,252ft 11.1s 10s
OK AeroTech I327 54.2oz 112ft/s 935ft/s 27.8G 3,268ft 11.2s 10s
OK AeroTech I364 55.9oz 107ft/s 912ft/s 25.4G 3,278ft 11.2s 10s
OK Cesaroni I255 50.2oz 94ft/s 871ft/s 21.6G 3,290ft 11.4s 9s
OK AMW I297 52.8oz 102ft/s 919ft/s 24.5G 3,305ft 11.3s 9s
OK AeroTech I435 50.3oz 158ft/s 1,043ft/s 53.2G 3,333ft 10.9s 10s
OK Cesaroni I303 49.6oz 111ft/s 937ft/s 29.0G 3,335ft 11.2s 9s
warningsW Loki I110 52.8oz 74ft/s 643ft/s 17.0G 3,349ft 12.3s 8s
OK AeroTech I280 53.7oz 102ft/s 919ft/s 21.6G 3,393ft 11.5s 10s
OK Cesaroni I242 51.4oz 91ft/s 878ft/s 19.0G 3,452ft 11.7s 9s
OK AeroTech I284 51.6oz 120ft/s 958ft/s 32.6G 3,459ft 11.3s 9s
OK Cesaroni I350 59.6oz 102ft/s 958ft/s 23.3G 3,492ft 11.7s 10s
OK AeroTech I500 52.3oz 136ft/s 1,126ft/s 38.7G 3,500ft 11.1s 10s
warningsW Cesaroni I540 53.1oz 143ft/s 1,167ft/s 42.0G 3,507ft 11.1s 10s
OK AeroTech I600 53.2oz 155ft/s 1,151ft/s 54.6G 3,511ft 11.1s 10s
OK KBA J740 57.5oz 154ft/s 1,231ft/s 57.1G 3,617ft 11.4s 11s
OK AeroTech J350 55.5oz 149ft/s 1,064ft/s 52.5G 3,618ft 11.3s 10s
OK AeroTech I350 53.7oz 112ft/s 1,080ft/s 31.3G 3,623ft 11.4s 10s
OK AeroTech J420 54.9oz 126ft/s 1,063ft/s 35.8G 3,637ft 11.5s 10s
OK AeroTech J340 52.4oz 128ft/s 1,044ft/s 40.3G 3,648ft 11.3s 9s
OK Cesaroni J335 54.1oz 113ft/s 1,025ft/s 26.4G 3,708ft 11.7s 10s
OK Cesaroni J357 53.2oz 122ft/s 1,066ft/s 33.8G 3,712ft 11.5s 10s
OK AeroTech J425 54.3oz 107ft/s 1,150ft/s 28.1G 3,744ft 11.5s 10s
OK Cesaroni J285 53.0oz 105ft/s 990ft/s 23.5G 3,782ft 11.9s 10s
OK Cesaroni I125 54.8oz 84ft/s 668ft/s 16.6G 3,812ft 13.0s 8s
OK AeroTech J500 55.1oz 157ft/s 1,170ft/s 50.9G 3,814ft 11.4s 10s
OK Cesaroni J270 55.1oz 90ft/s 966ft/s 18.2G 3,825ft 12.0s 10s
OK Cesaroni J316 53.4oz 112ft/s 1,000ft/s 28.5G 3,847ft 12.0s 10s
OK Cesaroni I216 53.2oz 93ft/s 883ft/s 21.9G 3,865ft 12.2s 9s
OK Cesaroni J290 55.3oz 110ft/s 999ft/s 24.6G 3,896ft 12.0s 10s
OK AeroTech I59 49.2oz 68ft/s 471ft/s 11.1G 3,915ft 14.9s 6s
OK AeroTech J270 54.6oz 104ft/s 1,004ft/s 22.6G 3,973ft 12.0s 9s
OK AeroTech J435 54.0oz 145ft/s 1,208ft/s 45.1G 4,019ft 11.6s 10s
OK Cesaroni J94 55.3oz 62ft/s 625ft/s 9.6G 4,470ft 14.8s 8s

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 (45ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (43ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni I55 speed at end of launch guide too slow (43ft/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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