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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 63 motors that fit and appear to have enough thrust (684 motors didn't fit, 44 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:   Tweety Bird (Binder Thug)
Owner: Phill Ash
Body Diameter: 4.00in
Dry Weight: 1,500g
MMT Diameter: 29.0mm
MMT Length: 13.50in
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 G88 1,652g 49ft/s 135ft/s 6.2G 298ft 4.6s 4s
OK AeroTech G74 1,587g 49ft/s 137ft/s 4.8G 315ft 4.8s 4s
OK AeroTech G104 1,636g 56ft/s 139ft/s 6.6G 315ft 4.6s 4s
OK AeroTech G79 1,657g 49ft/s 162ft/s 5.1G 436ft 5.6s 4s
OK Cesaroni G83 1,645g 50ft/s 165ft/s 5.2G 439ft 5.6s 4s
OK Cesaroni G250 1,641g 88ft/s 203ft/s 16.8G 489ft 5.4s 5s
OK AeroTech G76 1,647g 60ft/s 164ft/s 8.3G 498ft 5.8s 4s
OK AeroTech G64 1,651g 52ft/s 161ft/s 5.7G 508ft 6.0s 4s
OK Cesaroni G126 1,645g 64ft/s 195ft/s 8.8G 514ft 5.7s 5s
OK AeroTech G75 1,631g 49ft/s 176ft/s 5.3G 525ft 6.1s 4s
OK AeroTech G78 1,625g 50ft/s 185ft/s 5.4G 544ft 6.1s 4s
OK Cesaroni G131 1,700g 60ft/s 205ft/s 7.8G 555ft 6.0s 5s
OK AeroTech G125 1,625g 63ft/s 214ft/s 8.5G 581ft 6.0s 5s
OK AeroTech G80 1,628g 52ft/s 194ft/s 5.5G 590ft 6.3s 5s
OK Cesaroni G106 1,687g 51ft/s 217ft/s 6.9G 629ft 6.4s 5s
OK KBA G135 1,726g 57ft/s 233ft/s 8.2G 663ft 6.4s 5s
OK Cesaroni G54 1,693g 52ft/s 187ft/s 6.3G 759ft 7.4s 4s
OK Cesaroni G118 1,688g 58ft/s 249ft/s 8.4G 772ft 6.9s 6s
OK Cesaroni G125 1,695g 64ft/s 252ft/s 8.7G 774ft 6.9s 6s
OK AeroTech H165 1,702g 71ft/s 265ft/s 10.4G 784ft 6.8s 6s
OK Cesaroni H133 1,690g 65ft/s 259ft/s 10.6G 801ft 7.0s 6s
OK Cesaroni H175 1,747g 71ft/s 274ft/s 12.1G 805ft 6.9s 6s
OK Cesaroni H90 1,663g 57ft/s 242ft/s 8.5G 814ft 7.2s 5s
OK Cesaroni H87 1,705g 51ft/s 239ft/s 6.7G 816ft 7.4s 5s
OK Cesaroni H163 1,687g 69ft/s 276ft/s 12.1G 828ft 7.0s 6s
OK Cesaroni H410 1,682g 115ft/s 308ft/s 30.4G 836ft 6.7s 6s
OK AeroTech G138 1,648g 60ft/s 283ft/s 9.9G 838ft 7.0s 6s
OK AeroTech H128 1,706g 68ft/s 273ft/s 9.9G 848ft 7.1s 6s
OK Cesaroni H123 1,728g 57ft/s 271ft/s 7.2G 861ft 7.3s 6s
OK AeroTech H238 1,696g 80ft/s 291ft/s 13.2G 866ft 7.0s 6s
OK AeroTech H115 1,705g 57ft/s 268ft/s 6.4G 882ft 7.4s 6s
OK AeroTech H97 1,778g 51ft/s 260ft/s 5.3G 906ft 7.7s 6s
OK Cesaroni H118 1,732g 62ft/s 276ft/s 9.0G 930ft 7.5s 6s
OK Cesaroni H237 1,794g 79ft/s 340ft/s 14.8G 1,025ft 7.5s 7s
OK AeroTech H220 1,750g 85ft/s 338ft/s 16.9G 1,037ft 7.5s 6s
OK Cesaroni H151 1,738g 72ft/s 317ft/s 10.9G 1,049ft 7.7s 6s
OK AeroTech H210 1,746g 80ft/s 342ft/s 13.9G 1,056ft 7.6s 7s
OK KBA H130 2,209g 61ft/s 284ft/s 9.1G 1,070ft 8.1s 6s
OK Cesaroni H135 1,751g 65ft/s 320ft/s 8.6G 1,101ft 8.0s 6s
OK Cesaroni H170 1,732g 76ft/s 337ft/s 13.0G 1,105ft 7.8s 6s
OK Cesaroni H160 1,772g 69ft/s 338ft/s 9.7G 1,106ft 7.9s 6s
OK AeroTech H182 1,707g 69ft/s 351ft/s 10.3G 1,111ft 7.8s 7s
OK AeroTech H180 1,752g 78ft/s 355ft/s 13.8G 1,150ft 7.9s 7s
OK AeroTech H250 1,756g 96ft/s 378ft/s 17.7G 1,169ft 7.8s 7s
OK AeroTech H135 1,712g 63ft/s 322ft/s 8.2G 1,183ft 8.3s 6s
OK KBA H225 1,816g 72ft/s 383ft/s 13.8G 1,206ft 8.1s 7s
OK AeroTech H195 1,697g 82ft/s 383ft/s 14.3G 1,223ft 8.0s 7s
OK Cesaroni H295 1,842g 91ft/s 408ft/s 18.4G 1,244ft 8.0s 7s
OK Cesaroni H180 1,814g 79ft/s 379ft/s 14.2G 1,292ft 8.2s 7s
OK Cesaroni H194 1,784g 80ft/s 387ft/s 15.1G 1,294ft 8.2s 7s
OK Cesaroni H200 1,774g 82ft/s 393ft/s 15.7G 1,320ft 8.3s 7s
OK Cesaroni H140 1,777g 76ft/s 368ft/s 13.1G 1,370ft 8.6s 7s
OK Cesaroni H255 1,732g 94ft/s 434ft/s 21.1G 1,376ft 8.2s 7s
OK Cesaroni H399 1,794g 114ft/s 470ft/s 30.0G 1,395ft 8.2s 7s
OK Cesaroni H159 1,843g 69ft/s 407ft/s 9.3G 1,494ft 8.9s 7s
OK AeroTech H268 1,858g 89ft/s 460ft/s 17.0G 1,508ft 8.6s 7s
OK Cesaroni H233 1,828g 89ft/s 455ft/s 18.0G 1,536ft 8.7s 7s
OK Cesaroni H255 1,818g 94ft/s 474ft/s 22.2G 1,558ft 8.6s 7s
OK Cesaroni H160 1,819g 84ft/s 411ft/s 16.7G 1,569ft 8.9s 7s
OK AeroTech I200 1,858g 86ft/s 443ft/s 15.6G 1,598ft 8.9s 7s
OK Cesaroni I204 1,849g 89ft/s 469ft/s 18.7G 1,691ft 9.0s 7s
OK AeroTech I205 1,815g 81ft/s 477ft/s 19.4G 1,699ft 9.0s 7s
warningsW,D Estes G80 1,625g 5:1 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 (11ft/s)
failedG AeroTech E23 speed at end of launch guide too slow (24ft/s)
failedG AeroTech E16 speed at end of launch guide too slow (16ft/s)
failedG AeroTech F23 speed at end of launch guide too slow (27ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (29ft/s)
failedG AeroTech F27 speed at end of launch guide too slow (26ft/s)
failedG Estes F15 speed at end of launch guide too slow (2ft/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 (39ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (29ft/s)
failedG AeroTech F20 speed at end of launch guide too slow (29ft/s)
failedG Cesaroni F32 speed at end of launch guide too slow (25ft/s)
failedG AeroTech F42 speed at end of launch guide too slow (39ft/s)
failedG Cesaroni F29 speed at end of launch guide too slow (23ft/s)
failedG Cesaroni F31 speed at end of launch guide too slow (26ft/s)
failedA Cesaroni F120 rocket doesn't reach a safe altitude (156ft)
failedG Cesaroni F59 speed at end of launch guide too slow (41ft/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 (24ft/s)
failedG AeroTech F22 speed at end of launch guide too slow (21ft/s)
failedG AeroTech F52 speed at end of launch guide too slow (43ft/s)
failedG Apogee F10 speed at end of launch guide too slow (9ft/s)
failedG AeroTech F50 speed at end of launch guide too slow (42ft/s)
failedG Estes F50 speed at end of launch guide too slow (45ft/s)
failedG AeroTech F25 speed at end of launch guide too slow (35ft/s)
failedG AeroTech F40 speed at end of launch guide too slow (38ft/s)
failedG AeroTech G54 speed at end of launch guide too slow (45ft/s)
failedG AeroTech G38 speed at end of launch guide too slow (32ft/s)
failedG AeroTech G53 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni G80 speed at end of launch guide too slow (47ft/s)
failedG Estes G40 speed at end of launch guide too slow (40ft/s)
failedG AeroTech G77 speed at end of launch guide too slow (47ft/s)
failedG AeroTech G77 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni G57 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni G68 speed at end of launch guide too slow (42ft/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 (40ft/s)
failedG AeroTech G25 speed at end of launch guide too slow (28ft/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 (45ft/s)
failedG Cesaroni G33 speed at end of launch guide too slow (26ft/s)
failedG Cesaroni H54 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni H42 speed at end of launch guide too slow (33ft/s)
failedG Cesaroni H53 speed at end of launch guide too slow (42ft/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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