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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 67 motors that fit and appear to have enough thrust (684 motors didn't fit, 40 motors failed safety checks). 105 motor had thrust curves available and 208 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:   BAR Crayon Rocket (29mm)
Owner: K Sonesen
Body Diameter: 3.90in
Dry Weight: 38.6oz
MMT Diameter: 29.0mm
MMT Length: 14.00in
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 Cesaroni F120 42.3oz 62ft/s 137ft/s 11.1G 257ft 4.1s 4s
OK Cesaroni G88 44.0oz 49ft/s 185ft/s 8.5G 452ft 5.4s 4s
OK AeroTech G104 43.4oz 58ft/s 189ft/s 9.1G 470ft 5.4s 4s
OK AeroTech G74 41.7oz 48ft/s 191ft/s 6.8G 481ft 5.6s 4s
OK AeroTech G53 43.7oz 48ft/s 171ft/s 6.1G 505ft 5.9s 4s
OK AeroTech G77 42.9oz 48ft/s 220ft/s 7.1G 596ft 6.2s 5s
OK AeroTech G79 44.1oz 51ft/s 219ft/s 7.0G 622ft 6.3s 5s
OK Cesaroni G83 43.7oz 52ft/s 223ft/s 7.2G 626ft 6.2s 5s
OK Cesaroni G250 43.6oz 85ft/s 272ft/s 22.6G 658ft 6.0s 5s
OK AeroTech G76 43.8oz 64ft/s 219ft/s 11.4G 691ft 6.4s 5s
OK Cesaroni G126 43.7oz 65ft/s 260ft/s 12.1G 697ft 6.3s 5s
OK AeroTech G64 43.9oz 54ft/s 215ft/s 7.9G 710ft 6.6s 4s
OK AeroTech G75 43.2oz 49ft/s 236ft/s 7.4G 727ft 6.7s 5s
OK Cesaroni G131 45.7oz 61ft/s 272ft/s 10.6G 741ft 6.5s 5s
OK AeroTech G78 43.0oz 50ft/s 249ft/s 7.4G 743ft 6.7s 5s
OK AeroTech G125 43.0oz 63ft/s 285ft/s 11.3G 769ft 6.5s 6s
OK AeroTech G80 43.1oz 54ft/s 258ft/s 7.7G 794ft 6.8s 5s
OK Cesaroni G106 45.2oz 52ft/s 287ft/s 9.4G 828ft 6.9s 6s
OK KBA G135 46.6oz 56ft/s 306ft/s 10.8G 856ft 6.9s 6s
OK Cesaroni G125 45.5oz 64ft/s 328ft/s 11.8G 969ft 7.2s 6s
OK AeroTech H165 45.7oz 69ft/s 345ft/s 13.8G 970ft 7.1s 6s
OK Cesaroni G118 45.2oz 58ft/s 325ft/s 11.4G 971ft 7.3s 6s
OK Cesaroni H175 47.3oz 70ft/s 356ft/s 15.2G 987ft 7.2s 6s
OK Cesaroni H133 45.3oz 63ft/s 335ft/s 14.2G 995ft 7.3s 6s
OK Cesaroni G54 45.4oz 54ft/s 243ft/s 8.6G 997ft 7.9s 5s
OK Cesaroni H410 45.0oz 114ft/s 404ft/s 40.1G 999ft 6.9s 6s
OK Cesaroni H163 45.2oz 68ft/s 359ft/s 16.3G 1,014ft 7.3s 6s
OK Cesaroni H90 44.3oz 58ft/s 312ft/s 11.6G 1,024ft 7.5s 6s
OK AeroTech G138 43.8oz 59ft/s 370ft/s 12.8G 1,027ft 7.3s 6s
OK Cesaroni H87 45.8oz 52ft/s 308ft/s 9.1G 1,032ft 7.7s 6s
OK AeroTech H128 45.9oz 67ft/s 352ft/s 13.2G 1,037ft 7.4s 6s
OK AeroTech H238 45.5oz 79ft/s 376ft/s 17.4G 1,044ft 7.2s 6s
OK Cesaroni H54 46.0oz 49ft/s 249ft/s 6.9G 1,044ft 8.2s 5s
OK Cesaroni H123 46.6oz 58ft/s 349ft/s 9.7G 1,059ft 7.6s 6s
OK AeroTech H115 45.8oz 55ft/s 345ft/s 8.6G 1,083ft 7.7s 6s
OK AeroTech H97 48.4oz 50ft/s 331ft/s 7.1G 1,119ft 8.0s 6s
OK Cesaroni H118 46.8oz 63ft/s 351ft/s 12.0G 1,126ft 7.7s 6s
OK Cesaroni H237 49.0oz 79ft/s 434ft/s 18.7G 1,190ft 7.6s 7s
OK AeroTech H220 47.4oz 84ft/s 431ft/s 22.3G 1,204ft 7.6s 7s
OK AeroTech H210 47.3oz 78ft/s 436ft/s 18.1G 1,224ft 7.7s 7s
OK Cesaroni H151 47.0oz 70ft/s 400ft/s 14.6G 1,229ft 7.8s 6s
OK KBA H130 63.6oz 60ft/s 345ft/s 11.4G 1,276ft 8.4s 7s
OK Cesaroni H170 46.8oz 78ft/s 427ft/s 17.3G 1,277ft 7.8s 6s
OK AeroTech H182 45.9oz 71ft/s 447ft/s 13.6G 1,280ft 7.9s 7s
OK Cesaroni H160 48.2oz 69ft/s 426ft/s 12.8G 1,284ft 8.0s 7s
OK Cesaroni H135 47.5oz 66ft/s 401ft/s 11.5G 1,288ft 8.1s 6s
OK AeroTech H180 47.5oz 76ft/s 447ft/s 18.1G 1,314ft 7.9s 7s
OK AeroTech H250 47.6oz 93ft/s 477ft/s 23.3G 1,322ft 7.8s 7s
OK KBA H225 49.7oz 71ft/s 483ft/s 17.6G 1,367ft 8.1s 7s
OK AeroTech H195 45.5oz 82ft/s 483ft/s 19.1G 1,374ft 7.9s 7s
OK AeroTech H135 46.1oz 61ft/s 402ft/s 11.0G 1,377ft 8.3s 6s
OK Cesaroni H295 50.7oz 93ft/s 514ft/s 23.9G 1,385ft 7.9s 7s
OK Cesaroni H194 48.6oz 78ft/s 480ft/s 19.9G 1,449ft 8.1s 7s
OK Cesaroni H180 49.7oz 79ft/s 471ft/s 18.6G 1,451ft 8.2s 7s
OK Cesaroni H200 48.3oz 81ft/s 487ft/s 20.6G 1,472ft 8.2s 7s
OK Cesaroni H255 46.8oz 96ft/s 542ft/s 27.9G 1,509ft 8.1s 7s
OK Cesaroni H399 49.0oz 118ft/s 591ft/s 39.1G 1,512ft 8.0s 7s
OK Cesaroni H140 48.4oz 78ft/s 450ft/s 17.2G 1,541ft 8.5s 6s
OK AeroTech H268 51.2oz 89ft/s 564ft/s 22.0G 1,635ft 8.4s 7s
OK Cesaroni H159 50.7oz 67ft/s 490ft/s 12.2G 1,654ft 8.8s 7s
OK Cesaroni H233 50.2oz 86ft/s 557ft/s 23.4G 1,663ft 8.4s 7s
OK Cesaroni H255 49.8oz 94ft/s 581ft/s 28.8G 1,678ft 8.4s 7s
OK Cesaroni H160 49.9oz 87ft/s 496ft/s 21.8G 1,720ft 8.7s 7s
OK AeroTech I200 51.2oz 84ft/s 535ft/s 20.3G 1,731ft 8.7s 7s
OK Cesaroni I204 50.9oz 89ft/s 563ft/s 24.3G 1,812ft 8.8s 7s
OK AeroTech I205 49.7oz 79ft/s 574ft/s 25.3G 1,818ft 8.7s 7s
warningsW,D Estes G80 43.0oz 6:1 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 (17ft/s)
failedG AeroTech E23 speed at end of launch guide too slow (28ft/s)
failedG AeroTech E16 speed at end of launch guide too slow (22ft/s)
failedG AeroTech F23 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (30ft/s)
failedG AeroTech F27 speed at end of launch guide too slow (28ft/s)
failedG Estes F15 speed at end of launch guide too slow (14ft/s)
failedG AeroTech F37 speed at end of launch guide too slow (31ft/s)
failedG AeroTech F62 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (31ft/s)
failedG AeroTech F20 speed at end of launch guide too slow (32ft/s)
failedG Cesaroni F32 speed at end of launch guide too slow (27ft/s)
failedG AeroTech F42 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni F29 speed at end of launch guide too slow (25ft/s)
failedG Cesaroni F31 speed at end of launch guide too slow (28ft/s)
failedG Cesaroni F59 speed at end of launch guide too slow (43ft/s)
failed5 Estes F26 average thrust fails 5:1 thrust/weight ratio (2:1)
failedG AeroTech F26 speed at end of launch guide too slow (28ft/s)
failedG AeroTech F22 speed at end of launch guide too slow (24ft/s)
failedG AeroTech F52 speed at end of launch guide too slow (45ft/s)
failedG Apogee F10 speed at end of launch guide too slow (18ft/s)
failedG AeroTech F50 speed at end of launch guide too slow (44ft/s)
failedG Estes F50 speed at end of launch guide too slow (47ft/s)
failedG AeroTech F25 speed at end of launch guide too slow (37ft/s)
failedG AeroTech F40 speed at end of launch guide too slow (41ft/s)
failedG AeroTech G54 speed at end of launch guide too slow (46ft/s)
failedG AeroTech G38 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni G80 speed at end of launch guide too slow (46ft/s)
failedG Estes G40 speed at end of launch guide too slow (42ft/s)
failedG AeroTech G77 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni G57 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni G68 speed at end of launch guide too slow (43ft/s)
failedG AeroTech G79 speed at end of launch guide too slow (43ft/s)
failedG AeroTech G40 speed at end of launch guide too slow (42ft/s)
failedG AeroTech G25 speed at end of launch guide too slow (29ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (42ft/s)
failedG KBA G82 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni G33 speed at end of launch guide too slow (28ft/s)
failedG Cesaroni H42 speed at end of launch guide too slow (35ft/s)
failedG Cesaroni H53 speed at end of launch guide too slow (43ft/s)

G These simulations were run with a launch guide length of 6ft (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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