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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 55 motors that fit and appear to have enough thrust (679 motors didn't fit, 57 motors failed safety checks). 110 motor had thrust curves available and 217 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:   Tank Girl 29mm short
Owner: Jim Lane
Body Diameter: 4.00in
Dry Weight: 63.0oz
MMT Diameter: 29.0mm
MMT Length: 17.00in
CD: 0.80

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 67.8oz 52ft/s 115ft/s 5.5G 240ft 4.1s 3s
OK AeroTech G76 68.2oz 55ft/s 137ft/s 6.9G 393ft 5.3s 3s
OK Cesaroni G250 68.0oz 80ft/s 172ft/s 14.2G 394ft 5.0s 4s
OK Cesaroni G126 68.1oz 57ft/s 164ft/s 7.4G 411ft 5.3s 4s
OK Cesaroni G131 70.1oz 54ft/s 173ft/s 6.7G 449ft 5.5s 4s
OK AeroTech G125 67.4oz 56ft/s 180ft/s 7.1G 471ft 5.6s 5s
OK KBA G135 71.0oz 53ft/s 198ft/s 7.0G 548ft 6.0s 5s
OK Cesaroni G118 69.6oz 54ft/s 212ft/s 7.1G 647ft 6.6s 5s
OK Cesaroni G125 69.9oz 58ft/s 215ft/s 7.3G 652ft 6.5s 5s
OK AeroTech H165 70.1oz 65ft/s 226ft/s 8.8G 666ft 6.5s 5s
OK Cesaroni H133 69.7oz 59ft/s 221ft/s 8.9G 678ft 6.6s 5s
OK Cesaroni H90 68.7oz 52ft/s 206ft/s 7.1G 681ft 6.8s 5s
OK Cesaroni H175 71.7oz 65ft/s 234ft/s 10.5G 688ft 6.5s 6s
OK Cesaroni H163 69.6oz 63ft/s 236ft/s 10.2G 707ft 6.7s 6s
OK AeroTech G138 68.2oz 57ft/s 240ft/s 8.6G 714ft 6.7s 6s
OK AeroTech H128 70.3oz 62ft/s 233ft/s 8.3G 726ft 6.8s 5s
OK Cesaroni H410 69.4oz 107ft/s 263ft/s 25.9G 728ft 6.4s 6s
OK Cesaroni H123 71.0oz 53ft/s 231ft/s 6.0G 735ft 7.0s 5s
OK AeroTech H238 69.9oz 74ft/s 249ft/s 11.2G 749ft 6.7s 6s
OK AeroTech H115 70.2oz 51ft/s 229ft/s 5.3G 752ft 7.1s 5s
OK Cesaroni H118 71.2oz 57ft/s 237ft/s 7.6G 803ft 7.2s 6s
OK Cesaroni H237 73.4oz 74ft/s 293ft/s 13.0G 911ft 7.3s 6s
OK AeroTech H220 71.8oz 78ft/s 292ft/s 14.4G 923ft 7.3s 6s
OK Cesaroni H151 71.4oz 66ft/s 274ft/s 9.2G 926ft 7.5s 6s
OK AeroTech H210 71.7oz 74ft/s 295ft/s 11.9G 940ft 7.4s 6s
OK KBA H130 88.0oz 57ft/s 251ft/s 8.0G 944ft 7.8s 6s
OK Cesaroni H135 71.9oz 59ft/s 277ft/s 7.3G 973ft 7.8s 6s
OK Cesaroni H160 72.6oz 63ft/s 292ft/s 8.2G 983ft 7.7s 6s
OK Cesaroni H170 71.2oz 71ft/s 292ft/s 11.0G 986ft 7.6s 6s
OK AeroTech H182 70.3oz 66ft/s 303ft/s 8.8G 991ft 7.7s 6s
OK AeroTech H180 71.9oz 71ft/s 308ft/s 11.8G 1,035ft 7.7s 6s
OK AeroTech H135 70.5oz 57ft/s 280ft/s 6.9G 1,051ft 8.1s 6s
OK AeroTech H250 72.0oz 86ft/s 327ft/s 15.1G 1,059ft 7.7s 7s
OK KBA H225 74.1oz 67ft/s 332ft/s 12.0G 1,093ft 7.9s 7s
OK AeroTech H195 69.9oz 77ft/s 332ft/s 12.1G 1,111ft 7.9s 7s
OK Cesaroni H295 75.1oz 86ft/s 354ft/s 16.0G 1,142ft 7.9s 7s
OK Cesaroni H180 74.1oz 74ft/s 332ft/s 12.1G 1,179ft 8.2s 7s
OK Cesaroni H194 73.0oz 75ft/s 338ft/s 12.9G 1,183ft 8.1s 7s
OK Cesaroni H200 72.7oz 76ft/s 344ft/s 13.4G 1,210ft 8.2s 7s
OK Cesaroni H140 72.8oz 70ft/s 323ft/s 11.1G 1,250ft 8.5s 6s
OK Cesaroni H255 71.2oz 86ft/s 379ft/s 18.0G 1,278ft 8.2s 7s
OK Cesaroni H340 76.8oz 98ft/s 396ft/s 19.8G 1,296ft 8.2s 7s
OK Cesaroni H399 73.4oz 108ft/s 409ft/s 25.7G 1,306ft 8.2s 7s
OK Cesaroni H159 75.1oz 64ft/s 360ft/s 7.9G 1,380ft 8.9s 7s
OK Cesaroni H226 75.7oz 84ft/s 387ft/s 15.6G 1,403ft 8.6s 7s
OK AeroTech H268 75.6oz 85ft/s 406ft/s 14.7G 1,415ft 8.6s 7s
OK Cesaroni H233 74.6oz 83ft/s 401ft/s 15.4G 1,442ft 8.7s 7s
OK Cesaroni H160 74.3oz 79ft/s 365ft/s 14.3G 1,462ft 8.9s 7s
OK Cesaroni H255 74.2oz 90ft/s 417ft/s 19.0G 1,468ft 8.7s 7s
OK AeroTech I200 75.6oz 79ft/s 393ft/s 13.4G 1,502ft 9.0s 7s
OK Cesaroni I204 75.3oz 84ft/s 418ft/s 16.1G 1,603ft 9.1s 7s
OK AeroTech I205 74.1oz 77ft/s 424ft/s 16.7G 1,612ft 9.2s 7s
OK Cesaroni I224 76.1oz 90ft/s 453ft/s 19.5G 1,741ft 9.3s 8s
OK Cesaroni I243 77.1oz 86ft/s 457ft/s 19.4G 1,746ft 9.4s 8s
OK KBA J520 88.5oz 104ft/s 725ft/s 28.0G 2,555ft 10.6s 9s

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 (23ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (26ft/s)
failedG AeroTech F27 speed at end of launch guide too slow (22ft/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 (27ft/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 (22ft/s)
failedG AeroTech F42 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni F29 speed at end of launch guide too slow (20ft/s)
failedG Cesaroni F31 speed at end of launch guide too slow (22ft/s)
failedA Cesaroni F120 rocket doesn't reach a safe altitude (114ft)
failedG Cesaroni F59 speed at end of launch guide too slow (37ft/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 (30ft/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 (40ft/s)
failedG AeroTech G74 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni G88 speed at end of launch guide too slow (44ft/s)
failedG AeroTech G38 speed at end of launch guide too slow (28ft/s)
failedG AeroTech G53 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni G80 speed at end of launch guide too slow (42ft/s)
failedG Estes G40 speed at end of launch guide too slow (36ft/s)
failedG AeroTech G77 speed at end of launch guide too slow (43ft/s)
failedG AeroTech G77 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni G83 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni G57 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni G68 speed at end of launch guide too slow (39ft/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 (45ft/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 (36ft/s)
failedG AeroTech G25 speed at end of launch guide too slow (24ft/s)
failedG AeroTech G64 speed at end of launch guide too slow (47ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (44ft/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 (38ft/s)
failed5 Estes G80 average thrust fails 5:1 thrust/weight ratio (4:1)
failedG Cesaroni G106 speed at end of launch guide too slow (47ft/s)
failedG KBA G82 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni G33 speed at end of launch guide too slow (23ft/s)
failedG Cesaroni G54 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni H54 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni H87 speed at end of launch guide too slow (46ft/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)

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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