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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 85 motors that fit and appear to have enough thrust (684 motors didn't fit, 28 motors failed safety checks). 111 motor had thrust curves available and 219 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:   G Force
Owner: Kevin Katz
Body Diameter: 4.00in
Dry Weight: 1,184g
MMT Diameter: 29.0mm
MMT Length: 16.00in
CD: 0.75

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 F59 1,283g 48ft/s 113ft/s 4.6G 225ft 4.1s 3s
OK Cesaroni F120 1,290g 70ft/s 126ft/s 10.3G 230ft 3.9s 3s
OK AeroTech F67 1,264g 56ft/s 130ft/s 5.9G 273ft 4.3s 3s
OK AeroTech F50 1,269g 49ft/s 132ft/s 4.8G 314ft 4.8s 3s
OK AeroTech F52 1,306g 49ft/s 133ft/s 5.2G 331ft 4.9s 3s
warningsW Estes F50 1,268g 51ft/s 147ft/s 5.3G 377ft 5.1s 4s
OK AeroTech G54 1,320g 50ft/s 147ft/s 5.3G 385ft 5.2s 4s
OK Cesaroni G88 1,336g 55ft/s 171ft/s 7.9G 416ft 5.3s 4s
OK AeroTech G104 1,320g 65ft/s 176ft/s 8.4G 434ft 5.2s 4s
OK AeroTech G74 1,271g 54ft/s 177ft/s 6.3G 442ft 5.5s 4s
OK AeroTech G53 1,330g 52ft/s 158ft/s 5.6G 464ft 5.8s 4s
OK Cesaroni G80 1,327g 54ft/s 189ft/s 6.6G 492ft 5.7s 5s
OK AeroTech G77 1,349g 49ft/s 196ft/s 5.8G 535ft 6.0s 5s
OK AeroTech G77 1,306g 54ft/s 205ft/s 6.6G 556ft 6.0s 5s
OK AeroTech G79 1,308g 49ft/s 197ft/s 5.3G 581ft 6.3s 4s
OK Cesaroni G68 1,340g 49ft/s 196ft/s 6.0G 582ft 6.3s 5s
OK AeroTech G79 1,341g 55ft/s 205ft/s 6.5G 582ft 6.2s 5s
OK Cesaroni G83 1,329g 58ft/s 208ft/s 6.7G 585ft 6.1s 5s
OK Cesaroni G57 1,330g 50ft/s 186ft/s 5.8G 587ft 6.4s 4s
OK Cesaroni G250 1,325g 96ft/s 253ft/s 21.0G 624ft 5.9s 5s
OK AeroTech G76 1,331g 68ft/s 206ft/s 10.5G 651ft 6.3s 4s
OK Cesaroni G126 1,329g 72ft/s 243ft/s 11.2G 661ft 6.2s 5s
OK AeroTech G64 1,335g 60ft/s 202ft/s 7.3G 668ft 6.6s 4s
OK AeroTech G75 1,315g 56ft/s 221ft/s 6.8G 686ft 6.6s 5s
OK AeroTech G78 1,309g 55ft/s 233ft/s 6.9G 704ft 6.6s 5s
OK Cesaroni G131 1,384g 67ft/s 255ft/s 9.9G 705ft 6.4s 5s
OK AeroTech G125 1,309g 67ft/s 267ft/s 10.5G 734ft 6.5s 5s
OK AeroTech G80 1,312g 58ft/s 242ft/s 7.1G 755ft 6.8s 5s
OK Cesaroni G106 1,371g 59ft/s 269ft/s 8.8G 791ft 6.9s 6s
OK KBA G82 1,415g 49ft/s 252ft/s 6.0G 809ft 7.2s 5s
OK KBA G135 1,410g 63ft/s 288ft/s 10.1G 821ft 6.9s 6s
OK Cesaroni G125 1,378g 70ft/s 309ft/s 10.9G 938ft 7.3s 6s
OK Cesaroni G118 1,372g 65ft/s 306ft/s 10.6G 938ft 7.3s 6s
OK AeroTech H165 1,386g 78ft/s 325ft/s 12.9G 941ft 7.2s 6s
OK Cesaroni G54 1,377g 61ft/s 230ft/s 7.9G 953ft 7.8s 5s
OK Cesaroni H175 1,431g 77ft/s 335ft/s 14.5G 960ft 7.2s 6s
OK Cesaroni H133 1,374g 72ft/s 316ft/s 13.2G 964ft 7.3s 6s
OK Cesaroni H410 1,366g 129ft/s 379ft/s 37.6G 978ft 6.9s 6s
OK Cesaroni H163 1,371g 79ft/s 339ft/s 15.1G 986ft 7.3s 6s
OK Cesaroni H90 1,347g 64ft/s 296ft/s 10.7G 990ft 7.6s 6s
OK Cesaroni H87 1,389g 58ft/s 292ft/s 8.4G 996ft 7.7s 6s
OK Cesaroni H54 1,393g 53ft/s 236ft/s 6.4G 999ft 8.1s 5s
OK AeroTech G138 1,332g 67ft/s 348ft/s 12.1G 999ft 7.3s 6s
OK AeroTech H128 1,390g 76ft/s 333ft/s 12.3G 1,009ft 7.4s 6s
OK AeroTech H238 1,380g 90ft/s 354ft/s 16.3G 1,020ft 7.2s 6s
OK Cesaroni H123 1,412g 64ft/s 330ft/s 9.1G 1,029ft 7.6s 6s
OK AeroTech H115 1,389g 64ft/s 327ft/s 8.0G 1,053ft 7.7s 6s
OK AeroTech H97 1,462g 57ft/s 315ft/s 6.6G 1,086ft 8.0s 6s
OK Cesaroni H118 1,416g 69ft/s 333ft/s 11.2G 1,098ft 7.7s 6s
OK Cesaroni H237 1,478g 88ft/s 411ft/s 17.5G 1,173ft 7.7s 7s
OK AeroTech H220 1,434g 95ft/s 408ft/s 20.8G 1,186ft 7.7s 7s
OK AeroTech H210 1,430g 87ft/s 413ft/s 17.0G 1,207ft 7.8s 7s
OK Cesaroni H151 1,422g 81ft/s 380ft/s 13.6G 1,209ft 7.9s 6s
OK KBA H130 1,893g 67ft/s 331ft/s 10.8G 1,245ft 8.4s 7s
OK Cesaroni H170 1,416g 86ft/s 406ft/s 16.1G 1,260ft 7.9s 7s
OK AeroTech H182 1,391g 78ft/s 424ft/s 12.7G 1,265ft 8.0s 7s
OK Cesaroni H160 1,456g 75ft/s 405ft/s 12.0G 1,265ft 8.1s 7s
OK Cesaroni H135 1,435g 71ft/s 383ft/s 10.8G 1,267ft 8.2s 6s
OK AeroTech H180 1,436g 86ft/s 425ft/s 17.0G 1,300ft 8.0s 7s
OK AeroTech H250 1,440g 106ft/s 453ft/s 21.8G 1,311ft 7.9s 7s
OK KBA H225 1,500g 80ft/s 459ft/s 16.7G 1,355ft 8.2s 7s
OK AeroTech H135 1,396g 70ft/s 384ft/s 10.2G 1,355ft 8.4s 6s
OK AeroTech H195 1,381g 92ft/s 459ft/s 17.8G 1,366ft 8.0s 7s
OK Cesaroni H295 1,526g 105ft/s 488ft/s 22.4G 1,379ft 8.1s 7s
OK Cesaroni H53 1,470g 48ft/s 288ft/s 5.5G 1,390ft 9.6s 5s
OK Cesaroni H194 1,468g 88ft/s 459ft/s 18.6G 1,440ft 8.3s 7s
OK Cesaroni H180 1,498g 88ft/s 450ft/s 17.4G 1,440ft 8.3s 7s
OK Cesaroni H200 1,458g 91ft/s 465ft/s 19.3G 1,465ft 8.3s 7s
OK Cesaroni H255 1,416g 106ft/s 517ft/s 26.1G 1,508ft 8.2s 7s
OK Cesaroni H340 1,575g 116ft/s 538ft/s 27.8G 1,512ft 8.2s 7s
OK Cesaroni H399 1,478g 125ft/s 562ft/s 36.7G 1,515ft 8.2s 7s
OK Cesaroni H140 1,461g 86ft/s 432ft/s 16.1G 1,529ft 8.6s 7s
OK Cesaroni H226 1,544g 96ft/s 514ft/s 22.1G 1,633ft 8.6s 7s
OK AeroTech H268 1,542g 103ft/s 540ft/s 20.7G 1,638ft 8.6s 7s
OK Cesaroni H159 1,527g 74ft/s 473ft/s 11.4G 1,647ft 8.9s 7s
OK Cesaroni H233 1,512g 96ft/s 534ft/s 21.9G 1,666ft 8.6s 7s
OK Cesaroni H255 1,502g 109ft/s 556ft/s 27.0G 1,683ft 8.6s 7s
OK Cesaroni H160 1,503g 97ft/s 478ft/s 20.5G 1,716ft 8.9s 7s
OK AeroTech I200 1,542g 96ft/s 515ft/s 19.1G 1,733ft 8.8s 7s
OK Cesaroni I204 1,533g 102ft/s 543ft/s 22.8G 1,818ft 8.9s 7s
OK AeroTech I205 1,499g 90ft/s 553ft/s 23.8G 1,825ft 8.9s 7s
OK Cesaroni I224 1,554g 107ft/s 589ft/s 27.5G 1,938ft 9.0s 7s
OK Cesaroni I243 1,583g 103ft/s 585ft/s 27.1G 1,941ft 9.1s 7s
OK KBA J520 1,906g 121ft/s 899ft/s 37.1G 2,639ft 10.0s 9s
warningsW,D Estes G80 1,309g 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 (30ft/s)
failedG AeroTech E16 speed at end of launch guide too slow (23ft/s)
failedG AeroTech F23 speed at end of launch guide too slow (33ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (34ft/s)
failedG AeroTech F27 speed at end of launch guide too slow (31ft/s)
failedG Estes F15 speed at end of launch guide too slow (13ft/s)
failedG AeroTech F37 speed at end of launch guide too slow (36ft/s)
failedG AeroTech F62 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (35ft/s)
failedG AeroTech F20 speed at end of launch guide too slow (35ft/s)
failedG Cesaroni F32 speed at end of launch guide too slow (30ft/s)
failedG AeroTech F42 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni F29 speed at end of launch guide too slow (28ft/s)
failedG Cesaroni F31 speed at end of launch guide too slow (31ft/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 (29ft/s)
failedG AeroTech F22 speed at end of launch guide too slow (26ft/s)
failedG Apogee F10 speed at end of launch guide too slow (18ft/s)
failedG AeroTech F25 speed at end of launch guide too slow (40ft/s)
failedG AeroTech F40 speed at end of launch guide too slow (45ft/s)
failedG AeroTech G38 speed at end of launch guide too slow (37ft/s)
failedG Estes G40 speed at end of launch guide too slow (46ft/s)
failedG AeroTech G40 speed at end of launch guide too slow (46ft/s)
failedG AeroTech G25 speed at end of launch guide too slow (32ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni G33 speed at end of launch guide too slow (31ft/s)
failedG Cesaroni H42 speed at end of launch guide too slow (38ft/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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