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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 91 motors that fit and appear to have enough thrust (679 motors didn't fit, 21 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:   Big Bad Burt
Owner: Jim Lane
Body Diameter: 3.00in
Dry Weight: 28.0oz
MMT Diameter: 29.0mm
MMT Length: 16.00in
CD: 0.70

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 F62 31.8oz 55ft/s 161ft/s 6.2G 407ft 5.3s 4s
OK Cesaroni F120 31.7oz 85ft/s 188ft/s 15.3G 447ft 5.3s 5s
OK AeroTech F42 30.7oz 56ft/s 161ft/s 7.1G 448ft 5.5s 4s
OK Cesaroni F59 31.5oz 59ft/s 175ft/s 7.1G 453ft 5.5s 5s
OK AeroTech F50 31.0oz 62ft/s 205ft/s 7.4G 610ft 6.3s 5s
OK AeroTech F25 31.2oz 51ft/s 171ft/s 5.7G 611ft 6.6s 4s
OK AeroTech F52 32.3oz 61ft/s 205ft/s 7.8G 634ft 6.4s 5s
OK AeroTech F40 32.5oz 56ft/s 199ft/s 6.5G 683ft 6.8s 5s
warningsW Estes F50 30.9oz 63ft/s 227ft/s 8.1G 716ft 6.7s 5s
OK AeroTech G54 32.8oz 61ft/s 225ft/s 7.9G 722ft 6.8s 5s
OK Cesaroni G88 33.4oz 68ft/s 255ft/s 11.6G 760ft 6.8s 6s
OK AeroTech G104 32.8oz 79ft/s 260ft/s 12.4G 787ft 6.8s 6s
OK AeroTech G74 31.1oz 65ft/s 269ft/s 9.5G 819ft 7.0s 6s
OK AeroTech G53 33.1oz 64ft/s 241ft/s 8.4G 849ft 7.3s 5s
OK Cesaroni G80 33.1oz 64ft/s 282ft/s 9.7G 887ft 7.3s 6s
warningsW Estes G40 32.3oz 57ft/s 251ft/s 7.1G 953ft 7.8s 5s
OK AeroTech G40 32.3oz 57ft/s 251ft/s 7.1G 953ft 7.8s 5s
OK AeroTech G77 33.8oz 59ft/s 292ft/s 8.5G 956ft 7.6s 6s
OK AeroTech G77 32.3oz 64ft/s 307ft/s 9.8G 992ft 7.6s 6s
OK AeroTech G79 33.5oz 67ft/s 304ft/s 9.6G 1,023ft 7.8s 6s
OK Cesaroni G83 33.1oz 68ft/s 309ft/s 9.9G 1,030ft 7.7s 6s
OK Cesaroni G68 33.5oz 60ft/s 295ft/s 8.9G 1,033ft 7.9s 6s
OK AeroTech G79 32.4oz 58ft/s 299ft/s 8.0G 1,039ft 7.9s 6s
OK Cesaroni G57 33.1oz 63ft/s 282ft/s 8.6G 1,046ft 8.0s 6s
OK Cesaroni G250 33.0oz 114ft/s 367ft/s 30.4G 1,069ft 7.5s 7s
OK AeroTech G76 33.2oz 83ft/s 305ft/s 15.3G 1,124ft 7.9s 6s
OK Cesaroni G126 33.1oz 83ft/s 356ft/s 16.3G 1,133ft 7.8s 7s
OK AeroTech G64 33.3oz 73ft/s 301ft/s 10.7G 1,157ft 8.2s 6s
OK AeroTech G75 32.6oz 68ft/s 330ft/s 10.1G 1,184ft 8.2s 6s
OK Cesaroni G131 35.1oz 81ft/s 369ft/s 14.2G 1,191ft 8.0s 7s
OK AeroTech G78 32.4oz 68ft/s 347ft/s 10.2G 1,210ft 8.2s 7s
OK AeroTech G125 32.4oz 81ft/s 392ft/s 15.5G 1,243ft 8.0s 7s
OK AeroTech G80 32.5oz 70ft/s 360ft/s 10.5G 1,284ft 8.4s 7s
OK Cesaroni G106 34.6oz 70ft/s 392ft/s 12.6G 1,328ft 8.5s 7s
OK KBA G82 36.1oz 60ft/s 366ft/s 8.6G 1,359ft 8.8s 7s
OK KBA G135 36.0oz 75ft/s 413ft/s 14.5G 1,364ft 8.5s 7s
OK AeroTech G75 36.2oz 57ft/s 365ft/s 6.8G 1,441ft 9.2s 7s
OK AeroTech H165 35.1oz 93ft/s 466ft/s 18.5G 1,531ft 8.7s 8s
OK Cesaroni G125 34.9oz 85ft/s 446ft/s 15.7G 1,532ft 8.8s 8s
OK Cesaroni G118 34.6oz 79ft/s 443ft/s 15.2G 1,538ft 8.9s 8s
OK Cesaroni H175 36.7oz 92ft/s 477ft/s 20.7G 1,550ft 8.8s 8s
OK Cesaroni H133 34.7oz 85ft/s 456ft/s 18.9G 1,570ft 8.9s 8s
OK Cesaroni H410 34.4oz 151ft/s 540ft/s 53.5G 1,572ft 8.5s 8s
OK Cesaroni G54 34.8oz 73ft/s 341ft/s 11.5G 1,584ft 9.5s 6s
OK Cesaroni H163 34.6oz 91ft/s 487ft/s 21.6G 1,598ft 8.9s 8s
OK Cesaroni H90 33.7oz 79ft/s 432ft/s 15.5G 1,619ft 9.1s 7s
OK AeroTech G138 33.2oz 81ft/s 507ft/s 17.6G 1,622ft 8.9s 8s
OK AeroTech H128 35.3oz 89ft/s 477ft/s 17.5G 1,628ft 9.0s 8s
OK Cesaroni H87 35.2oz 70ft/s 426ft/s 12.1G 1,631ft 9.3s 7s
OK AeroTech H238 34.9oz 104ft/s 506ft/s 23.3G 1,638ft 8.8s 8s
OK Cesaroni H54 35.4oz 66ft/s 351ft/s 9.3G 1,656ft 9.8s 6s
OK Cesaroni H123 36.0oz 77ft/s 473ft/s 12.9G 1,662ft 9.2s 8s
OK AeroTech H115 35.2oz 74ft/s 473ft/s 11.6G 1,698ft 9.3s 8s
OK AeroTech H97 37.8oz 67ft/s 452ft/s 9.4G 1,747ft 9.6s 7s
OK Cesaroni H118 36.2oz 84ft/s 477ft/s 15.9G 1,758ft 9.3s 8s
OK Cesaroni H237 38.4oz 103ft/s 577ft/s 24.8G 1,843ft 9.2s 8s
OK AeroTech H220 36.8oz 110ft/s 575ft/s 29.0G 1,867ft 9.2s 8s
OK AeroTech H210 36.7oz 105ft/s 583ft/s 24.0G 1,900ft 9.3s 8s
OK Cesaroni H151 36.4oz 92ft/s 541ft/s 19.1G 1,906ft 9.4s 8s
OK KBA H130 53.0oz 77ft/s 438ft/s 13.9G 1,933ft 10.3s 8s
OK Cesaroni H170 36.2oz 102ft/s 575ft/s 22.6G 1,976ft 9.5s 8s
OK AeroTech H182 35.3oz 94ft/s 607ft/s 18.2G 1,982ft 9.5s 8s
OK Cesaroni H160 37.6oz 90ft/s 573ft/s 16.7G 1,985ft 9.7s 8s
OK Cesaroni H135 36.9oz 87ft/s 545ft/s 15.1G 1,993ft 9.7s 8s
OK AeroTech H180 36.9oz 101ft/s 601ft/s 23.8G 2,026ft 9.6s 8s
OK AeroTech H250 37.0oz 121ft/s 637ft/s 30.4G 2,040ft 9.5s 9s
OK KBA H225 39.1oz 93ft/s 641ft/s 23.2G 2,110ft 9.8s 9s
OK AeroTech H195 34.9oz 108ft/s 656ft/s 25.2G 2,113ft 9.6s 8s
OK Cesaroni H295 40.1oz 119ft/s 677ft/s 30.6G 2,125ft 9.6s 9s
OK AeroTech H135 35.5oz 82ft/s 549ft/s 14.6G 2,128ft 10.0s 8s
OK Cesaroni H53 38.1oz 57ft/s 419ft/s 7.8G 2,218ft 11.2s 7s
OK Cesaroni H180 39.1oz 102ft/s 628ft/s 23.9G 2,220ft 10.0s 8s
OK Cesaroni H194 38.0oz 101ft/s 644ft/s 25.7G 2,221ft 9.9s 9s
OK Cesaroni H200 37.7oz 106ft/s 654ft/s 26.7G 2,256ft 9.9s 9s
OK Cesaroni H340 41.8oz 127ft/s 739ft/s 37.3G 2,303ft 9.8s 9s
OK Cesaroni H255 36.2oz 125ft/s 728ft/s 36.4G 2,313ft 9.8s 9s
OK Cesaroni H399 38.4oz 152ft/s 781ft/s 50.2G 2,318ft 9.8s 9s
OK Cesaroni H140 37.8oz 102ft/s 609ft/s 22.4G 2,354ft 10.2s 8s
OK Cesaroni H226 40.7oz 114ft/s 710ft/s 30.0G 2,482ft 10.2s 9s
OK AeroTech H268 40.6oz 116ft/s 747ft/s 28.2G 2,492ft 10.2s 9s
OK Cesaroni H159 40.1oz 87ft/s 663ft/s 15.8G 2,514ft 10.6s 9s
OK Cesaroni H233 39.6oz 115ft/s 742ft/s 30.0G 2,528ft 10.2s 9s
OK Cesaroni H255 39.2oz 121ft/s 774ft/s 36.9G 2,552ft 10.2s 9s
OK Cesaroni H160 39.3oz 111ft/s 667ft/s 28.0G 2,606ft 10.5s 8s
OK AeroTech I200 40.6oz 110ft/s 715ft/s 25.9G 2,619ft 10.5s 9s
OK Cesaroni I204 40.3oz 114ft/s 753ft/s 30.9G 2,736ft 10.5s 9s
OK AeroTech I205 39.1oz 109ft/s 772ft/s 32.5G 2,738ft 10.5s 9s
OK Cesaroni I243 42.1oz 122ft/s 807ft/s 36.3G 2,903ft 10.7s 9s
OK Cesaroni I224 41.1oz 126ft/s 812ft/s 37.0G 2,904ft 10.7s 9s
OK KBA J520 53.5oz 142ft/s 1,194ft/s 47.0G 3,915ft 11.9s 11s
warningsW,D Estes G80 32.4oz 9:1 thrust/weight ratio (no data)

W Motor total weight unknown, lift-off Weight not accurate.

D No simulation data found for this motor.

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 Estes E16 speed at end of launch guide too slow (27ft/s)
failedG AeroTech E23 speed at end of launch guide too slow (40ft/s)
failedG AeroTech E16 speed at end of launch guide too slow (33ft/s)
failedG AeroTech F23 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (43ft/s)
failedG AeroTech F27 speed at end of launch guide too slow (40ft/s)
failedG Estes F15 speed at end of launch guide too slow (24ft/s)
failedG AeroTech F37 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (43ft/s)
failedG AeroTech F20 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni F32 speed at end of launch guide too slow (39ft/s)
failedG Cesaroni F29 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni F31 speed at end of launch guide too slow (40ft/s)
failed5 Estes F26 average thrust fails 5:1 thrust/weight ratio (3:1)
failedG AeroTech F26 speed at end of launch guide too slow (39ft/s)
failedG AeroTech F22 speed at end of launch guide too slow (34ft/s)
failedG Apogee F10 speed at end of launch guide too slow (29ft/s)
failedG AeroTech G38 speed at end of launch guide too slow (47ft/s)
failedG AeroTech G25 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni G33 speed at end of launch guide too slow (39ft/s)
failedG Cesaroni H42 speed at end of launch guide too slow (47ft/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.

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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