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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 57 motors that fit and appear to have enough thrust (685 motors didn't fit, 60 motors failed safety checks). 115 motor had thrust curves available and 233 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 Torrent
Owner: Louie Berlin
Body Diameter: 4.00in
Dry Weight: 4.00lb
MMT Diameter: 29.0mm
MMT Length: 36.00in
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 AeroTech G104 4.30lb 51ft/s 113ft/s 5.4G 235ft 4.1s 3s
OK AeroTech G76 4.32lb 54ft/s 135ft/s 6.8G 388ft 5.3s 3s
OK Cesaroni G250 4.31lb 81ft/s 169ft/s 14.0G 391ft 5.0s 4s
OK AeroTech G64 4.33lb 48ft/s 131ft/s 4.6G 392ft 5.5s 3s
OK Cesaroni G126 4.32lb 56ft/s 161ft/s 7.3G 407ft 5.2s 4s
OK Cesaroni G131 4.44lb 53ft/s 171ft/s 6.7G 446ft 5.5s 4s
OK AeroTech G125 4.28lb 55ft/s 177ft/s 7.0G 468ft 5.6s 5s
OK Cesaroni G106 4.41lb 48ft/s 180ft/s 5.7G 508ft 6.0s 5s
OK KBA G135 4.50lb 53ft/s 195ft/s 6.9G 546ft 6.1s 5s
OK Cesaroni G118 4.41lb 53ft/s 209ft/s 6.9G 647ft 6.6s 5s
OK Cesaroni G125 4.43lb 58ft/s 212ft/s 7.2G 651ft 6.6s 5s
OK AeroTech H165 4.44lb 64ft/s 223ft/s 8.6G 667ft 6.5s 5s
OK Cesaroni H133 4.42lb 58ft/s 218ft/s 8.7G 679ft 6.7s 5s
OK Cesaroni H90 4.36lb 51ft/s 203ft/s 7.0G 681ft 6.9s 5s
OK RATT H70 4.78lb 51ft/s 184ft/s 5.4G 687ft 7.1s 4s
OK Cesaroni H175 4.54lb 64ft/s 232ft/s 10.4G 689ft 6.6s 6s
OK Cesaroni H163 4.41lb 65ft/s 233ft/s 10.1G 710ft 6.7s 6s
OK AeroTech G138 4.33lb 56ft/s 237ft/s 8.5G 717ft 6.8s 6s
OK AeroTech H128 4.45lb 62ft/s 231ft/s 8.2G 728ft 6.8s 5s
OK Cesaroni H410 4.40lb 105ft/s 260ft/s 25.6G 732ft 6.5s 6s
OK Cesaroni H123 4.50lb 52ft/s 229ft/s 6.0G 736ft 7.0s 5s
OK AeroTech H238 4.43lb 73ft/s 246ft/s 11.1G 753ft 6.8s 6s
OK AeroTech H115 4.45lb 52ft/s 227ft/s 5.2G 754ft 7.1s 5s
OK Cesaroni H118 4.51lb 56ft/s 235ft/s 7.5G 807ft 7.2s 6s
OK Cesaroni H237 4.65lb 73ft/s 290ft/s 12.9G 921ft 7.4s 6s
OK AeroTech H220 4.55lb 77ft/s 289ft/s 14.2G 933ft 7.4s 6s
OK Cesaroni H151 4.52lb 65ft/s 272ft/s 9.1G 935ft 7.5s 6s
OK KBA H130 5.56lb 57ft/s 249ft/s 7.9G 950ft 7.8s 6s
OK AeroTech H210 4.54lb 73ft/s 292ft/s 11.8G 951ft 7.5s 6s
OK Cesaroni H135 4.55lb 58ft/s 275ft/s 7.2G 983ft 7.9s 6s
OK Cesaroni H160 4.60lb 62ft/s 290ft/s 8.1G 994ft 7.8s 6s
OK Cesaroni H170 4.51lb 69ft/s 289ft/s 10.8G 997ft 7.7s 6s
OK AeroTech H182 4.46lb 65ft/s 300ft/s 8.6G 1,003ft 7.8s 7s
OK AeroTech H180 4.56lb 72ft/s 305ft/s 11.6G 1,049ft 7.8s 6s
OK AeroTech H135 4.47lb 56ft/s 279ft/s 6.8G 1,062ft 8.2s 6s
OK AeroTech H250 4.56lb 85ft/s 324ft/s 14.9G 1,075ft 7.8s 7s
OK KBA H225 4.70lb 66ft/s 329ft/s 11.9G 1,109ft 8.1s 7s
OK AeroTech H195 4.43lb 76ft/s 329ft/s 11.9G 1,130ft 8.0s 7s
OK Cesaroni H295 4.75lb 85ft/s 351ft/s 15.9G 1,162ft 8.0s 7s
OK Cesaroni H180 4.69lb 73ft/s 329ft/s 12.0G 1,199ft 8.3s 7s
OK Cesaroni H194 4.63lb 74ft/s 336ft/s 12.7G 1,203ft 8.3s 7s
OK Cesaroni H200 4.60lb 75ft/s 341ft/s 13.2G 1,232ft 8.3s 7s
OK Cesaroni H140 4.61lb 69ft/s 321ft/s 11.0G 1,271ft 8.6s 7s
OK Cesaroni H255 4.51lb 85ft/s 376ft/s 17.7G 1,305ft 8.4s 7s
OK Cesaroni H340 4.86lb 96ft/s 393ft/s 19.5G 1,325ft 8.4s 7s
OK Cesaroni H399 4.65lb 106ft/s 406ft/s 25.4G 1,336ft 8.3s 8s
OK Cesaroni H159 4.76lb 63ft/s 359ft/s 7.8G 1,407ft 9.1s 7s
OK Cesaroni H226 4.79lb 83ft/s 385ft/s 15.4G 1,434ft 8.8s 7s
OK AeroTech H268 4.79lb 84ft/s 403ft/s 14.5G 1,448ft 8.8s 8s
OK Cesaroni H233 4.72lb 81ft/s 399ft/s 15.2G 1,476ft 8.9s 7s
OK Cesaroni H160 4.70lb 78ft/s 363ft/s 14.1G 1,493ft 9.1s 7s
OK Cesaroni H255 4.70lb 89ft/s 415ft/s 18.7G 1,505ft 8.9s 8s
OK AeroTech I200 4.79lb 78ft/s 392ft/s 13.2G 1,537ft 9.1s 7s
OK Cesaroni I204 4.77lb 83ft/s 417ft/s 15.9G 1,645ft 9.3s 8s
OK AeroTech I205 4.69lb 76ft/s 423ft/s 16.4G 1,654ft 9.3s 7s
OK Cesaroni I224 4.82lb 89ft/s 452ft/s 19.2G 1,790ft 9.5s 8s
OK Cesaroni I243 4.88lb 85ft/s 456ft/s 19.1G 1,796ft 9.6s 8s

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
failed5 Estes E16 average thrust fails 5:1 thrust/weight ratio (1:1)
failedG AeroTech E23 speed at end of launch guide too slow (19ft/s)
failedG AeroTech E16 speed at end of launch guide too slow (9ft/s)
failedG AeroTech F23 speed at end of launch guide too slow (22ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (25ft/s)
failedG AeroTech F27 speed at end of launch guide too slow (21ft/s)
failed5 Estes F15 average thrust fails 5:1 thrust/weight ratio (1:1)
failedG AeroTech F37 speed at end of launch guide too slow (26ft/s)
failedG AeroTech F62 speed at end of launch guide too slow (35ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (26ft/s)
failedG AeroTech F20 speed at end of launch guide too slow (24ft/s)
failedG Cesaroni F32 speed at end of launch guide too slow (21ft/s)
failedG AeroTech F42 speed at end of launch guide too slow (33ft/s)
failedG Cesaroni F29 speed at end of launch guide too slow (19ft/s)
failedG Cesaroni F31 speed at end of launch guide too slow (22ft/s)
failedA Cesaroni F120 rocket doesn't reach a safe altitude (111ft)
failedG Cesaroni F59 speed at end of launch guide too slow (36ft/s)
failedG AeroTech F67 speed at end of launch guide too slow (42ft/s)
failed5 Estes F26 average thrust fails 5:1 thrust/weight ratio (1:1)
failedG AeroTech F26 speed at end of launch guide too slow (20ft/s)
failedG AeroTech F22 speed at end of launch guide too slow (17ft/s)
failedG AeroTech F52 speed at end of launch guide too slow (39ft/s)
failed5 Apogee F10 average thrust fails 5:1 thrust/weight ratio (1:1)
failedG AeroTech F50 speed at end of launch guide too slow (38ft/s)
failedG Estes F50 speed at end of launch guide too slow (40ft/s)
failedG AeroTech F25 speed at end of launch guide too slow (29ft/s)
failedG AeroTech F40 speed at end of launch guide too slow (34ft/s)
failedG AeroTech G54 speed at end of launch guide too slow (39ft/s)
failedG AeroTech G74 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni G88 speed at end of launch guide too slow (45ft/s)
failedG AeroTech G38 speed at end of launch guide too slow (27ft/s)
failedG AeroTech G53 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni G80 speed at end of launch guide too slow (43ft/s)
failedG Estes G40 speed at end of launch guide too slow (35ft/s)
failedG AeroTech G77 speed at end of launch guide too slow (42ft/s)
failedG AeroTech G77 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni G83 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni G57 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni G68 speed at end of launch guide too slow (38ft/s)
failedG AeroTech G79 speed at end of launch guide too slow (39ft/s)
failedG AeroTech G79 speed at end of launch guide too slow (44ft/s)
failedG AeroTech G78 speed at end of launch guide too slow (45ft/s)
failedG AeroTech G40 speed at end of launch guide too slow (35ft/s)
failedG AeroTech G25 speed at end of launch guide too slow (24ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (45ft/s)
failedG AeroTech G80 speed at end of launch guide too slow (47ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (37ft/s)
failed5 AeroTech G8 average thrust fails 5:1 thrust/weight ratio (0:1)
failed5 Estes G80 average thrust fails 5:1 thrust/weight ratio (4:1)
failed5 AeroTech G11 average thrust fails 5:1 thrust/weight ratio (1:1)
failed5 AeroTech G12 average thrust fails 5:1 thrust/weight ratio (1:1)
failedG KBA G82 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni G33 speed at end of launch guide too slow (22ft/s)
failedG Cesaroni G54 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni H54 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni H87 speed at end of launch guide too slow (47ft/s)
failedG AeroTech H97 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni H42 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni H53 speed at end of launch guide too slow (38ft/s)
failedG RATT I80 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.)

5 The 5:1 thrust-to-weight ratio check is a useful rule of thumb, but it does break down for motors with unusual thrust curves. For example, motors with a high initial thrust and a long tail-off may fail this test but still be safe for use.

A The minimum altitude check is used to ensure that the rocket flies high enough to ensure time for a safe recovery. In addition, many barometric altimeters require a minimum altitude to detect lift-off. (The minimum altitude is 10m or 33ft for an A motor and doubles for each impulse class).

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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