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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 61 motors that fit and appear to have enough thrust (678 motors didn't fit, 52 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:   gforce
Owner: E. Hansen
Body Diameter: 4.00in
Dry Weight: 46.0oz
MMT Diameter: 29.0mm
MMT Length: 18.00in
CD: 0.30

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 49.7oz 57ft/s 116ft/s 9.4G 217ft 3.9s 3s
OK AeroTech G104 50.8oz 53ft/s 164ft/s 7.6G 454ft 5.6s 5s
OK Cesaroni G250 51.0oz 80ft/s 236ft/s 19.5G 734ft 6.7s 6s
OK AeroTech G76 51.2oz 57ft/s 201ft/s 9.6G 741ft 7.1s 5s
OK AeroTech G64 51.3oz 49ft/s 197ft/s 6.6G 757ft 7.3s 5s
OK Cesaroni G126 51.1oz 57ft/s 231ft/s 10.2G 772ft 7.1s 6s
OK Cesaroni G131 53.1oz 54ft/s 242ft/s 9.5G 837ft 7.4s 6s
OK AeroTech G125 50.4oz 55ft/s 254ft/s 10.1G 891ft 7.5s 7s
OK AeroTech G80 50.5oz 49ft/s 236ft/s 6.4G 903ft 7.8s 6s
OK KBA G135 54.0oz 53ft/s 276ft/s 9.6G 1,018ft 8.1s 7s
OK Cesaroni G54 52.8oz 50ft/s 238ft/s 7.2G 1,168ft 9.1s 6s
OK Cesaroni G118 52.6oz 54ft/s 300ft/s 9.7G 1,212ft 8.8s 7s
OK Cesaroni G125 52.9oz 58ft/s 303ft/s 10.0G 1,215ft 8.7s 7s
OK AeroTech H165 53.1oz 65ft/s 315ft/s 12.0G 1,238ft 8.7s 8s
OK RATT H70 58.4oz 52ft/s 265ft/s 7.4G 1,255ft 9.2s 7s
OK Cesaroni H133 52.7oz 60ft/s 311ft/s 12.1G 1,264ft 8.9s 8s
OK Cesaroni H175 54.7oz 63ft/s 323ft/s 14.7G 1,270ft 8.8s 8s
OK Cesaroni H90 51.7oz 54ft/s 298ft/s 9.8G 1,284ft 9.1s 7s
OK Cesaroni H163 52.6oz 65ft/s 329ft/s 13.8G 1,319ft 8.9s 8s
OK AeroTech G138 51.2oz 56ft/s 338ft/s 12.2G 1,347ft 9.1s 8s
OK AeroTech H128 53.3oz 64ft/s 328ft/s 11.4G 1,351ft 9.1s 8s
OK Cesaroni H410 52.4oz 106ft/s 358ft/s 35.1G 1,351ft 8.7s 8s
OK Cesaroni H123 54.0oz 54ft/s 325ft/s 8.4G 1,367ft 9.3s 8s
OK AeroTech H238 52.9oz 75ft/s 345ft/s 15.3G 1,391ft 9.0s 8s
OK AeroTech H115 53.2oz 52ft/s 328ft/s 7.4G 1,408ft 9.4s 8s
OK Cesaroni H118 54.2oz 58ft/s 337ft/s 10.3G 1,490ft 9.6s 8s
OK KBA H130 71.0oz 55ft/s 335ft/s 10.1G 1,630ft 10.2s 8s
OK Cesaroni H237 56.4oz 73ft/s 400ft/s 18.1G 1,677ft 9.8s 9s
OK AeroTech H220 54.8oz 77ft/s 401ft/s 19.1G 1,704ft 9.8s 9s
OK Cesaroni H151 54.4oz 67ft/s 385ft/s 12.4G 1,715ft 10.0s 9s
OK AeroTech H210 54.7oz 74ft/s 408ft/s 16.2G 1,742ft 9.9s 9s
OK Cesaroni H135 54.9oz 59ft/s 393ft/s 9.8G 1,804ft 10.4s 9s
OK Cesaroni H160 55.6oz 62ft/s 407ft/s 11.0G 1,819ft 10.3s 9s
OK Cesaroni H170 54.2oz 71ft/s 407ft/s 14.8G 1,827ft 10.2s 9s
OK AeroTech H182 53.3oz 64ft/s 425ft/s 12.1G 1,852ft 10.3s 9s
OK AeroTech H180 54.9oz 73ft/s 428ft/s 15.9G 1,915ft 10.4s 9s
OK AeroTech H135 53.5oz 58ft/s 402ft/s 9.4G 1,957ft 10.8s 9s
OK AeroTech H250 55.0oz 86ft/s 451ft/s 20.1G 1,961ft 10.4s 9s
OK KBA H225 57.1oz 65ft/s 455ft/s 16.3G 2,018ft 10.7s 10s
OK AeroTech H195 52.9oz 75ft/s 466ft/s 16.3G 2,076ft 10.7s 10s
OK Cesaroni H295 58.1oz 86ft/s 481ft/s 22.3G 2,101ft 10.7s 10s
OK Cesaroni H180 57.1oz 73ft/s 460ft/s 16.0G 2,168ft 11.0s 9s
OK Cesaroni H194 56.0oz 72ft/s 471ft/s 17.1G 2,185ft 11.0s 10s
OK Cesaroni H200 55.7oz 75ft/s 479ft/s 17.8G 2,238ft 11.0s 10s
OK Cesaroni H140 55.8oz 71ft/s 458ft/s 14.8G 2,306ft 11.4s 9s
OK Cesaroni H255 54.2oz 88ft/s 526ft/s 24.0G 2,380ft 11.1s 10s
OK Cesaroni H340 59.8oz 94ft/s 534ft/s 25.7G 2,382ft 11.1s 10s
OK Cesaroni H399 56.4oz 109ft/s 555ft/s 33.8G 2,425ft 11.2s 10s
OK Cesaroni H159 58.1oz 62ft/s 510ft/s 10.6G 2,543ft 11.9s 10s
OK Cesaroni H226 58.7oz 83ft/s 534ft/s 20.5G 2,577ft 11.6s 10s
OK AeroTech H268 58.6oz 83ft/s 557ft/s 19.3G 2,611ft 11.7s 11s
OK Cesaroni H233 57.6oz 80ft/s 556ft/s 20.3G 2,664ft 11.8s 10s
OK Cesaroni H160 57.3oz 80ft/s 515ft/s 18.9G 2,686ft 12.0s 10s
OK Cesaroni H255 57.2oz 88ft/s 577ft/s 25.0G 2,718ft 11.8s 11s
OK AeroTech I200 58.6oz 78ft/s 550ft/s 17.6G 2,760ft 12.0s 10s
OK Cesaroni I204 58.3oz 83ft/s 587ft/s 21.1G 2,955ft 12.3s 11s
OK AeroTech I205 57.1oz 73ft/s 597ft/s 21.9G 2,977ft 12.3s 10s
OK Cesaroni I224 59.1oz 93ft/s 631ft/s 25.4G 3,209ft 12.6s 11s
OK Cesaroni I243 60.1oz 84ft/s 639ft/s 25.1G 3,214ft 12.6s 11s
OK KBA J520 71.5oz 105ft/s 978ft/s 34.9G 4,740ft 14.5s 13s
warningsW,D Estes G80 50.4oz 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 (13ft/s)
failedG AeroTech E23 speed at end of launch guide too slow (25ft/s)
failedG AeroTech E16 speed at end of launch guide too slow (18ft/s)
failedG AeroTech F23 speed at end of launch guide too slow (26ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (27ft/s)
failedG AeroTech F27 speed at end of launch guide too slow (25ft/s)
failedG Estes F15 speed at end of launch guide too slow (10ft/s)
failedG AeroTech F37 speed at end of launch guide too slow (29ft/s)
failedG AeroTech F62 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (28ft/s)
failedG AeroTech F20 speed at end of launch guide too slow (28ft/s)
failedG Cesaroni F32 speed at end of launch guide too slow (24ft/s)
failedG AeroTech F42 speed at end of launch guide too slow (37ft/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 (25ft/s)
failedG Cesaroni F59 speed at end of launch guide too slow (39ft/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 (42ft/s)
failedG Apogee F10 speed at end of launch guide too slow (14ft/s)
failedG AeroTech F50 speed at end of launch guide too slow (40ft/s)
failedG Estes F50 speed at end of launch guide too slow (41ft/s)
failedG AeroTech F25 speed at end of launch guide too slow (33ft/s)
failedG AeroTech F40 speed at end of launch guide too slow (37ft/s)
failedG AeroTech G54 speed at end of launch guide too slow (41ft/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 (45ft/s)
failedG AeroTech G38 speed at end of launch guide too slow (30ft/s)
failedG AeroTech G53 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni G80 speed at end of launch guide too slow (43ft/s)
failedG Estes G40 speed at end of launch guide too slow (38ft/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 (47ft/s)
failedG Cesaroni G57 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni G68 speed at end of launch guide too slow (40ft/s)
failedG AeroTech G79 speed at end of launch guide too slow (40ft/s)
failedG AeroTech G79 speed at end of launch guide too slow (46ft/s)
failedG AeroTech G78 speed at end of launch guide too slow (46ft/s)
failedG AeroTech G40 speed at end of launch guide too slow (38ft/s)
failedG AeroTech G25 speed at end of launch guide too slow (26ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (47ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (39ft/s)
failedG Cesaroni G106 speed at end of launch guide too slow (47ft/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 (25ft/s)
failedG Cesaroni H54 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni H87 speed at end of launch guide too slow (47ft/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 (32ft/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 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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