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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 88 motors that fit and appear to have enough thrust (718 motors didn't fit, 5 motors failed safety checks). 93 motor had thrust curves available and 207 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 4 V2
Owner: Rodney Earp
Body Diameter: 4.00in
Dry Weight: 30.0oz
MMT Diameter: 38.0mm
MMT Length: 12.00in
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 38.5oz 60ft/s 245ft/s 8.2G 736ft 6.5s 5s
OK AeroTech G67 37.1oz 56ft/s 258ft/s 7.6G 752ft 6.7s 5s
OK AeroTech G61 36.8oz 54ft/s 243ft/s 6.8G 755ft 6.7s 5s
OK AeroTech G339 36.4oz 126ft/s 335ft/s 36.2G 755ft 6.1s 6s
OK Loki G70 38.5oz 60ft/s 255ft/s 8.4G 793ft 6.8s 5s
OK Loki G80 39.0oz 66ft/s 267ft/s 9.4G 798ft 6.7s 5s
OK Loki G94 38.5oz 71ft/s 286ft/s 11.1G 822ft 6.7s 5s
OK Cesaroni G185 36.6oz 85ft/s 358ft/s 18.5G 857ft 6.5s 6s
OK Cesaroni G79 38.0oz 50ft/s 301ft/s 7.1G 876ft 7.1s 5s
OK Cesaroni G69 36.9oz 55ft/s 279ft/s 7.4G 883ft 7.2s 5s
OK Loki G66 38.8oz 64ft/s 275ft/s 9.7G 910ft 7.2s 5s
OK AeroTech G69 37.1oz 54ft/s 303ft/s 6.6G 934ft 7.3s 5s
OK Cesaroni G115 36.9oz 70ft/s 351ft/s 11.8G 957ft 7.0s 6s
OK Cesaroni G60 37.3oz 56ft/s 292ft/s 7.3G 958ft 7.4s 5s
OK Cesaroni G78 36.9oz 56ft/s 315ft/s 11.7G 982ft 7.3s 5s
warningsW AeroTech H283 38.7oz 111ft/s 507ft/s 29.5G 1,216ft 7.2s 6s
OK AeroTech H73 40.9oz 51ft/s 327ft/s 6.2G 1,220ft 8.3s 5s
OK Loki H100 41.8oz 66ft/s 389ft/s 10.6G 1,262ft 7.9s 6s
OK AeroTech H669 38.9oz 177ft/s 620ft/s 101.6G 1,271ft 7.1s 7s
OK AeroTech H130 38.4oz 103ft/s 431ft/s 23.3G 1,315ft 7.6s 6s
OK AeroTech H148 40.9oz 83ft/s 444ft/s 15.9G 1,321ft 7.8s 6s
OK AeroTech H219 39.2oz 102ft/s 539ft/s 25.9G 1,391ft 7.6s 7s
OK Cesaroni H400 40.0oz 123ft/s 657ft/s 37.5G 1,428ft 7.5s 7s
OK Loki H144 41.9oz 98ft/s 465ft/s 20.3G 1,431ft 7.9s 6s
OK AeroTech H123 39.7oz 72ft/s 416ft/s 12.4G 1,439ft 8.2s 6s
OK AeroTech H100 39.2oz 66ft/s 416ft/s 10.4G 1,447ft 8.3s 6s
OK Cesaroni H123 40.5oz 65ft/s 476ft/s 11.9G 1,450ft 8.2s 6s
OK AeroTech H242 39.3oz 94ft/s 533ft/s 20.4G 1,455ft 7.8s 6s
OK Cesaroni H143 42.2oz 67ft/s 488ft/s 11.6G 1,455ft 8.2s 6s
OK Loki H125 42.1oz 83ft/s 440ft/s 16.6G 1,467ft 8.2s 6s
OK Loki H90 41.8oz 72ft/s 396ft/s 11.6G 1,490ft 8.5s 6s
OK Loki H160 41.8oz 103ft/s 501ft/s 23.8G 1,491ft 7.9s 6s
OK Cesaroni H225 36.8oz 100ft/s 635ft/s 24.2G 1,548ft 7.7s 7s
OK AeroTech H550 41.1oz 156ft/s 777ft/s 55.5G 1,578ft 7.6s 7s
OK AeroTech H999 41.7oz 202ft/s 841ft/s 138.1G 1,585ft 7.6s 7s
OK Cesaroni H120 40.4oz 68ft/s 483ft/s 12.1G 1,588ft 8.5s 6s
OK AeroTech H550 41.4oz 154ft/s 767ft/s 54.8G 1,600ft 7.7s 7s
OK Cesaroni H125 40.3oz 67ft/s 511ft/s 11.6G 1,606ft 8.5s 6s
warningsW Cesaroni H565 42.8oz 145ft/s 786ft/s 51.1G 1,614ft 7.7s 7s
OK AeroTech H178 41.4oz 76ft/s 575ft/s 15.4G 1,615ft 8.2s 6s
OK Cesaroni H152 40.5oz 78ft/s 535ft/s 17.9G 1,631ft 8.3s 6s
OK AeroTech H112 43.4oz 58ft/s 405ft/s 8.1G 1,636ft 9.1s 6s
OK Cesaroni H110 41.5oz 61ft/s 471ft/s 9.1G 1,642ft 8.8s 6s
OK AeroTech I218 43.1oz 98ft/s 606ft/s 22.8G 1,714ft 8.3s 7s
OK Cesaroni H100 41.5oz 62ft/s 463ft/s 9.3G 1,742ft 9.1s 6s
OK AeroTech H170 41.6oz 84ft/s 570ft/s 16.3G 1,767ft 8.5s 6s
OK Cesaroni I566 43.6oz 140ft/s 869ft/s 48.1G 1,770ft 7.9s 7s
OK AeroTech I180 43.6oz 117ft/s 553ft/s 28.9G 1,770ft 8.3s 6s
OK AeroTech I357 42.1oz 117ft/s 686ft/s 31.4G 1,796ft 8.2s 7s
OK AeroTech I245 42.9oz 111ft/s 638ft/s 33.0G 1,799ft 8.2s 7s
OK AeroTech I161 42.9oz 85ft/s 558ft/s 17.1G 1,825ft 8.6s 6s
OK Cesaroni I180 43.9oz 77ft/s 616ft/s 14.6G 1,826ft 8.7s 7s
OK AeroTech I1299 44.9oz 229ft/s 1,036ft/s 118.8G 1,843ft 7.9s 8s
OK AeroTech I225 47.1oz 82ft/s 623ft/s 18.7G 1,847ft 8.6s 7s
OK Cesaroni I800 46.1oz 167ft/s 967ft/s 64.5G 1,860ft 8.0s 7s
OK Cesaroni I212 46.8oz 80ft/s 643ft/s 16.2G 1,878ft 8.7s 7s
OK AeroTech I175 42.3oz 92ft/s 551ft/s 20.2G 1,901ft 8.9s 7s
OK AeroTech I140 42.6oz 74ft/s 525ft/s 13.8G 1,902ft 8.9s 6s
OK Cesaroni I345 43.9oz 112ft/s 788ft/s 31.0G 1,938ft 8.4s 7s
OK AeroTech I285 47.4oz 101ft/s 719ft/s 27.4G 2,001ft 8.7s 7s
OK AeroTech I305 50.5oz 107ft/s 728ft/s 27.6G 2,037ft 8.6s 7s
OK Cesaroni I195 44.7oz 84ft/s 642ft/s 17.8G 2,041ft 9.0s 7s
OK Cesaroni I236 44.1oz 94ft/s 705ft/s 24.4G 2,059ft 8.7s 7s
OK AeroTech I300 45.6oz 119ft/s 745ft/s 35.8G 2,068ft 8.6s 7s
OK AeroTech H45 42.9oz 53ft/s 368ft/s 6.1G 2,081ft 10.8s 5s
OK Cesaroni I170 43.8oz 83ft/s 660ft/s 17.4G 2,092ft 9.0s 7s
OK AeroTech I154 47.4oz 69ft/s 509ft/s 11.6G 2,114ft 9.7s 6s
OK Cesaroni I223 47.4oz 86ft/s 704ft/s 18.3G 2,120ft 9.0s 7s
OK AeroTech I211 46.0oz 97ft/s 657ft/s 24.0G 2,124ft 8.9s 7s
OK Cesaroni I175 45.4oz 78ft/s 634ft/s 13.9G 2,126ft 9.2s 7s
OK AeroTech I195 50.2oz 100ft/s 652ft/s 24.9G 2,153ft 9.1s 7s
OK Loki I316 49.0oz 129ft/s 760ft/s 35.2G 2,162ft 8.8s 7s
OK Loki I405 49.2oz 155ft/s 841ft/s 58.0G 2,167ft 8.6s 7s
OK Cesaroni I287 51.3oz 92ft/s 776ft/s 20.7G 2,219ft 9.0s 7s
OK Cesaroni I470 47.5oz 138ft/s 965ft/s 41.3G 2,257ft 8.6s 7s
OK Loki I430 49.0oz 119ft/s 915ft/s 38.1G 2,269ft 8.8s 8s
OK Loki I377 49.8oz 144ft/s 819ft/s 46.7G 2,286ft 8.9s 7s
OK AeroTech I366 49.6oz 122ft/s 839ft/s 34.6G 2,301ft 8.9s 7s
OK Cesaroni I285 47.8oz 105ft/s 784ft/s 25.6G 2,305ft 9.0s 7s
OK Loki I210 49.0oz 108ft/s 694ft/s 31.5G 2,323ft 9.2s 7s
OK AeroTech I435 48.3oz 152ft/s 941ft/s 55.4G 2,333ft 8.7s 7s
OK Cesaroni I255 48.2oz 98ft/s 760ft/s 22.1G 2,362ft 9.2s 7s
OK Cesaroni I303 47.6oz 108ft/s 827ft/s 30.2G 2,375ft 9.0s 7s
OK AeroTech I284 49.6oz 120ft/s 842ft/s 33.6G 2,458ft 9.0s 7s
OK Cesaroni I242 49.4oz 95ft/s 758ft/s 19.8G 2,491ft 9.4s 7s
warningsW Loki I110 50.8oz 74ft/s 563ft/s 17.7G 2,501ft 10.3s 6s
OK Cesaroni J357 51.2oz 117ft/s 931ft/s 35.2G 2,627ft 9.2s 7s
OK AeroTech I59 47.2oz 67ft/s 443ft/s 11.3G 3,028ft 13.2s 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 (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 (42ft/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 7ft (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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