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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 56 motors that fit and appear to have enough thrust (678 motors didn't fit, 57 motors failed safety checks). 111 motor had thrust curves available and 220 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
Owner: Jim Lane
Body Diameter: 4.00in
Dry Weight: 67.0oz
MMT Diameter: 29.0mm
MMT Length: 20.00in
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 71.8oz 50ft/s 107ft/s 5.1G 216ft 4.0s 3s
OK AeroTech G76 72.2oz 53ft/s 128ft/s 6.5G 357ft 5.1s 3s
OK Cesaroni G250 72.0oz 79ft/s 161ft/s 13.4G 362ft 4.8s 4s
OK Cesaroni G126 72.1oz 55ft/s 154ft/s 6.9G 376ft 5.1s 4s
OK Cesaroni G131 74.1oz 52ft/s 163ft/s 6.4G 412ft 5.3s 4s
OK AeroTech G125 71.4oz 54ft/s 168ft/s 6.7G 432ft 5.4s 4s
OK KBA G135 75.0oz 52ft/s 186ft/s 6.6G 507ft 5.9s 5s
OK Cesaroni G118 73.6oz 52ft/s 199ft/s 6.6G 601ft 6.4s 5s
OK Cesaroni G125 73.9oz 56ft/s 202ft/s 6.9G 606ft 6.4s 5s
OK AeroTech H165 74.1oz 64ft/s 213ft/s 8.3G 621ft 6.3s 5s
OK Cesaroni H90 72.7oz 50ft/s 193ft/s 6.7G 632ft 6.7s 5s
OK Cesaroni H133 73.7oz 58ft/s 208ft/s 8.4G 632ft 6.5s 5s
OK RATT H70 79.4oz 50ft/s 175ft/s 5.2G 640ft 6.9s 4s
OK Cesaroni H175 75.7oz 64ft/s 221ft/s 10.0G 643ft 6.4s 5s
OK Cesaroni H163 73.6oz 62ft/s 222ft/s 9.6G 662ft 6.5s 5s
OK AeroTech G138 72.2oz 55ft/s 226ft/s 8.1G 668ft 6.6s 5s
OK AeroTech H128 74.3oz 61ft/s 220ft/s 7.8G 680ft 6.6s 5s
OK Cesaroni H410 73.4oz 104ft/s 249ft/s 24.5G 686ft 6.3s 6s
OK Cesaroni H123 75.0oz 52ft/s 218ft/s 5.7G 687ft 6.8s 5s
OK AeroTech H115 74.2oz 51ft/s 216ft/s 5.0G 702ft 6.9s 5s
OK AeroTech H238 73.9oz 71ft/s 235ft/s 10.6G 704ft 6.6s 6s
OK Cesaroni H118 75.2oz 55ft/s 224ft/s 7.1G 754ft 7.0s 5s
OK Cesaroni H237 77.4oz 73ft/s 277ft/s 12.4G 865ft 7.2s 6s
OK Cesaroni H151 75.4oz 65ft/s 259ft/s 8.7G 877ft 7.4s 6s
OK AeroTech H220 75.8oz 76ft/s 276ft/s 13.6G 877ft 7.2s 6s
OK AeroTech H210 75.7oz 72ft/s 280ft/s 11.3G 893ft 7.3s 6s
OK KBA H130 92.0oz 54ft/s 240ft/s 7.6G 895ft 7.7s 6s
OK Cesaroni H135 75.9oz 57ft/s 263ft/s 6.8G 922ft 7.7s 6s
OK Cesaroni H160 76.6oz 59ft/s 277ft/s 7.7G 934ft 7.6s 6s
OK Cesaroni H170 75.2oz 66ft/s 277ft/s 10.4G 937ft 7.5s 6s
OK AeroTech H182 74.3oz 62ft/s 286ft/s 8.2G 942ft 7.6s 6s
OK AeroTech H180 75.9oz 70ft/s 292ft/s 11.1G 987ft 7.6s 6s
OK AeroTech H135 74.5oz 55ft/s 266ft/s 6.4G 997ft 8.0s 6s
OK AeroTech H250 76.0oz 86ft/s 311ft/s 14.2G 1,013ft 7.6s 7s
OK KBA H225 78.1oz 66ft/s 315ft/s 11.4G 1,045ft 7.9s 7s
OK AeroTech H195 73.9oz 72ft/s 315ft/s 11.4G 1,064ft 7.8s 7s
OK Cesaroni H295 79.1oz 82ft/s 336ft/s 15.3G 1,098ft 7.8s 7s
OK Cesaroni H180 78.1oz 70ft/s 315ft/s 11.5G 1,131ft 8.1s 7s
OK Cesaroni H194 77.0oz 71ft/s 321ft/s 12.2G 1,135ft 8.1s 7s
OK Cesaroni H200 76.7oz 72ft/s 327ft/s 12.6G 1,163ft 8.1s 7s
OK Cesaroni H140 76.8oz 66ft/s 307ft/s 10.5G 1,199ft 8.4s 6s
OK Cesaroni H255 75.2oz 86ft/s 360ft/s 17.0G 1,234ft 8.2s 7s
OK Cesaroni H340 80.8oz 92ft/s 377ft/s 18.8G 1,255ft 8.2s 7s
OK Cesaroni H399 77.4oz 102ft/s 389ft/s 24.4G 1,265ft 8.2s 7s
OK Cesaroni H159 79.1oz 63ft/s 343ft/s 7.5G 1,330ft 8.9s 7s
OK Cesaroni H226 79.7oz 79ft/s 369ft/s 14.8G 1,359ft 8.6s 7s
OK AeroTech H268 79.6oz 81ft/s 387ft/s 13.9G 1,373ft 8.6s 7s
OK Cesaroni H233 78.6oz 80ft/s 383ft/s 14.6G 1,399ft 8.7s 7s
OK Cesaroni H160 78.3oz 78ft/s 348ft/s 13.5G 1,414ft 8.9s 7s
OK Cesaroni H255 78.2oz 85ft/s 398ft/s 18.0G 1,427ft 8.7s 7s
OK AeroTech I200 79.6oz 78ft/s 376ft/s 12.7G 1,458ft 9.0s 7s
OK Cesaroni I204 79.3oz 80ft/s 400ft/s 15.2G 1,562ft 9.1s 7s
OK AeroTech I205 78.1oz 72ft/s 405ft/s 15.8G 1,571ft 9.2s 7s
OK Cesaroni I224 80.1oz 85ft/s 434ft/s 18.5G 1,703ft 9.3s 8s
OK Cesaroni I243 81.1oz 82ft/s 438ft/s 18.4G 1,709ft 9.4s 8s
OK KBA J520 92.5oz 106ft/s 700ft/s 26.7G 2,542ft 10.7s 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 (17ft/s)
failedG AeroTech E16 speed at end of launch guide too slow (8ft/s)
failedG AeroTech F23 speed at end of launch guide too slow (21ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (24ft/s)
failedG AeroTech F27 speed at end of launch guide too slow (20ft/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 (25ft/s)
failedG AeroTech F62 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (24ft/s)
failedG AeroTech F20 speed at end of launch guide too slow (23ft/s)
failedG Cesaroni F32 speed at end of launch guide too slow (20ft/s)
failedG AeroTech F42 speed at end of launch guide too slow (32ft/s)
failedG Cesaroni F29 speed at end of launch guide too slow (18ft/s)
failedG Cesaroni F31 speed at end of launch guide too slow (21ft/s)
failedA Cesaroni F120 rocket doesn't reach a safe altitude (102ft)
failedG Cesaroni F59 speed at end of launch guide too slow (36ft/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 (19ft/s)
failedG AeroTech F22 speed at end of launch guide too slow (16ft/s)
failedG AeroTech F52 speed at end of launch guide too slow (37ft/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 (36ft/s)
failedG Estes F50 speed at end of launch guide too slow (38ft/s)
failedG AeroTech F25 speed at end of launch guide too slow (28ft/s)
failedG AeroTech F40 speed at end of launch guide too slow (33ft/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 (42ft/s)
failedG Cesaroni G88 speed at end of launch guide too slow (43ft/s)
failedG AeroTech G38 speed at end of launch guide too slow (26ft/s)
failedG AeroTech G53 speed at end of launch guide too slow (39ft/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 (34ft/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 (44ft/s)
failedG Cesaroni G57 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni G68 speed at end of launch guide too slow (37ft/s)
failedG AeroTech G79 speed at end of launch guide too slow (38ft/s)
failedG AeroTech G79 speed at end of launch guide too slow (43ft/s)
failedG AeroTech G78 speed at end of launch guide too slow (44ft/s)
failedG AeroTech G40 speed at end of launch guide too slow (34ft/s)
failedG AeroTech G25 speed at end of launch guide too slow (23ft/s)
failedG AeroTech G64 speed at end of launch guide too slow (45ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (43ft/s)
failedG AeroTech G80 speed at end of launch guide too slow (45ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (36ft/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 (45ft/s)
failedG KBA G82 speed at end of launch guide too slow (40ft/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 (45ft/s)
failedG Cesaroni H54 speed at end of launch guide too slow (40ft/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 (45ft/s)
failedG Cesaroni H42 speed at end of launch guide too slow (29ft/s)
failedG Cesaroni H53 speed at end of launch guide too slow (37ft/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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