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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 138 motors that fit and appear to have enough thrust (648 motors didn't fit, 25 motors failed safety checks). 163 motor had thrust curves available and 334 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 SAM
Owner: Allen
Body Diameter: 4.00in
Dry Weight: 4.50lb
MMT Diameter: 38.0mm
MMT Length: 26.00in
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 Contrail G130 5.64lb 61ft/s 106ft/s 20.4G 226ft 4.0s 3s
OK Contrail G234 5.70lb 101ft/s 134ft/s 20.5G 312ft 4.5s 4s
OK AeroTech G339 4.90lb 91ft/s 155ft/s 16.3G 374ft 4.9s 5s
OK Loki G94 5.03lb 50ft/s 136ft/s 4.9G 375ft 5.3s 4s
OK Contrail G123 5.63lb 59ft/s 148ft/s 13.2G 421ft 5.4s 4s
OK Contrail G100 5.63lb 56ft/s 145ft/s 6.3G 435ft 5.6s 4s
OK Cesaroni G185 4.92lb 63ft/s 166ft/s 8.5G 447ft 5.5s 5s
OK Cesaroni G115 4.93lb 48ft/s 168ft/s 5.0G 504ft 6.1s 5s
OK Contrail H300 5.85lb 100ft/s 182ft/s 26.5G 544ft 5.9s 5s
OK Contrail H222 5.65lb 84ft/s 181ft/s 26.0G 549ft 6.0s 5s
OK Contrail H303 5.80lb 108ft/s 195ft/s 29.2G 614ft 6.2s 6s
OK Contrail H211 5.82lb 93ft/s 225ft/s 23.3G 841ft 7.3s 6s
OK Loki H100 5.24lb 50ft/s 215ft/s 5.4G 874ft 7.9s 6s
OK Contrail H121 5.85lb 59ft/s 223ft/s 9.2G 929ft 8.1s 6s
OK Contrail H246 5.82lb 93ft/s 246ft/s 19.6G 954ft 7.8s 7s
warningsW AeroTech H283 5.04lb 83ft/s 263ft/s 14.0G 991ft 7.9s 7s
OK AeroTech H148 5.18lb 61ft/s 251ft/s 7.4G 1,030ft 8.4s 7s
OK AeroTech H130 5.02lb 73ft/s 248ft/s 10.6G 1,060ft 8.4s 7s
OK Contrail H141 5.85lb 66ft/s 248ft/s 9.2G 1,064ft 8.4s 7s
OK AeroTech H123 5.11lb 52ft/s 245ft/s 5.6G 1,133ft 9.0s 7s
OK Loki H90 5.24lb 51ft/s 240ft/s 5.3G 1,143ft 9.1s 7s
OK AeroTech H669 5.06lb 128ft/s 308ft/s 48.2G 1,198ft 8.4s 8s
OK Loki H125 5.25lb 62ft/s 265ft/s 7.8G 1,226ft 9.1s 7s
OK Cesaroni H143 5.27lb 51ft/s 281ft/s 6.1G 1,234ft 9.3s 8s
OK Loki H144 5.24lb 70ft/s 275ft/s 9.7G 1,237ft 9.0s 7s
OK AeroTech H219 5.08lb 76ft/s 300ft/s 12.0G 1,275ft 9.0s 8s
OK AeroTech H242 5.08lb 68ft/s 304ft/s 9.5G 1,353ft 9.3s 8s
OK Loki H160 5.24lb 73ft/s 300ft/s 11.4G 1,386ft 9.4s 8s
OK Cesaroni H120 5.15lb 51ft/s 296ft/s 5.5G 1,415ft 10.0s 8s
OK Cesaroni H400 5.13lb 93ft/s 345ft/s 18.6G 1,473ft 9.4s 9s
OK Cesaroni H125 5.15lb 50ft/s 308ft/s 5.7G 1,476ft 10.1s 8s
OK Cesaroni H152 5.16lb 59ft/s 328ft/s 8.3G 1,602ft 10.3s 9s
OK AeroTech H178 5.21lb 56ft/s 344ft/s 8.4G 1,652ft 10.4s 9s
OK Cesaroni H225 4.93lb 70ft/s 362ft/s 10.8G 1,681ft 10.2s 9s
OK AeroTech I218 5.32lb 75ft/s 382ft/s 11.1G 1,920ft 10.9s 9s
OK AeroTech H170 5.23lb 61ft/s 371ft/s 7.9G 1,929ft 11.1s 9s
OK AeroTech H550 5.21lb 114ft/s 421ft/s 27.1G 1,970ft 10.6s 10s
OK AeroTech I180 5.35lb 85ft/s 368ft/s 14.2G 1,975ft 11.0s 9s
OK AeroTech H550 5.20lb 115ft/s 425ft/s 27.3G 1,985ft 10.6s 10s
warningsW Cesaroni H565 5.30lb 113ft/s 427ft/s 27.0G 2,000ft 10.7s 10s
OK AeroTech I175 5.27lb 69ft/s 375ft/s 9.8G 2,013ft 11.3s 9s
OK AeroTech I161 5.31lb 63ft/s 374ft/s 8.3G 2,023ft 11.4s 9s
OK AeroTech H999 5.23lb 154ft/s 441ft/s 68.1G 2,037ft 10.6s 10s
OK Cesaroni I180 5.37lb 58ft/s 395ft/s 8.1G 2,067ft 11.5s 10s
OK AeroTech I140 5.28lb 57ft/s 371ft/s 6.7G 2,076ft 11.7s 9s
OK AeroTech I225 5.57lb 63ft/s 412ft/s 10.4G 2,195ft 11.6s 10s
OK AeroTech I245 5.30lb 90ft/s 422ft/s 16.6G 2,224ft 11.5s 10s
OK Cesaroni I212 5.55lb 61ft/s 424ft/s 9.6G 2,239ft 11.8s 10s
OK AeroTech I357 5.26lb 87ft/s 434ft/s 15.2G 2,250ft 11.5s 10s
OK AeroTech I154 5.58lb 52ft/s 380ft/s 5.8G 2,298ft 12.6s 9s
OK Cesaroni I566 5.35lb 108ft/s 490ft/s 25.9G 2,424ft 11.6s 11s
OK Cesaroni I195 5.42lb 65ft/s 453ft/s 8.9G 2,546ft 12.5s 11s
OK Cesaroni I345 5.37lb 88ft/s 500ft/s 15.3G 2,635ft 12.3s 11s
OK Cesaroni I175 5.46lb 60ft/s 456ft/s 7.1G 2,646ft 12.9s 10s
OK Cesaroni I170 5.36lb 63ft/s 463ft/s 8.5G 2,646ft 12.8s 10s
OK AeroTech I285 5.59lb 81ft/s 487ft/s 14.3G 2,659ft 12.4s 11s
OK Cesaroni I236 5.38lb 72ft/s 489ft/s 12.0G 2,742ft 12.8s 11s
OK Cesaroni I800 5.51lb 129ft/s 546ft/s 36.9G 2,753ft 12.2s 12s
OK AeroTech I305 5.78lb 83ft/s 503ft/s 15.1G 2,823ft 12.7s 11s
OK Cesaroni I223 5.59lb 64ft/s 496ft/s 9.4G 2,824ft 13.0s 11s
OK AeroTech I211 5.50lb 76ft/s 480ft/s 12.1G 2,824ft 12.9s 11s
OK AeroTech I195 5.76lb 78ft/s 478ft/s 13.2G 2,833ft 12.9s 11s
OK AeroTech I1299 5.43lb 175ft/s 568ft/s 62.8G 2,847ft 12.2s 12s
OK AeroTech I300 5.47lb 89ft/s 516ft/s 18.1G 2,886ft 12.8s 11s
warningsW Loki I110 5.80lb 54ft/s 444ft/s 9.2G 3,071ft 14.1s 10s
OK Loki I316 5.69lb 98ft/s 538ft/s 18.9G 3,101ft 13.1s 12s
OK AeroTech I59 5.57lb 51ft/s 299ft/s 5.9G 3,108ft 15.7s 7s
OK Cesaroni I287 5.83lb 74ft/s 555ft/s 12.6G 3,186ft 13.5s 12s
OK Loki I210 5.69lb 83ft/s 520ft/s 16.5G 3,234ft 13.6s 11s
OK Loki I405 5.70lb 116ft/s 583ft/s 30.7G 3,308ft 13.3s 12s
OK Cesaroni I285 5.62lb 79ft/s 582ft/s 13.1G 3,427ft 13.9s 12s
OK Cesaroni I255 5.64lb 75ft/s 580ft/s 11.7G 3,472ft 14.0s 12s
OK Loki I377 5.73lb 105ft/s 597ft/s 24.8G 3,492ft 13.7s 12s
OK Loki I430 5.69lb 96ft/s 626ft/s 20.0G 3,513ft 13.8s 13s
OK AeroTech I327 5.88lb 85ft/s 609ft/s 15.5G 3,568ft 14.0s 12s
OK AMW I297 5.80lb 79ft/s 604ft/s 13.5G 3,583ft 14.1s 12s
OK AeroTech I364 5.99lb 82ft/s 609ft/s 15.0G 3,594ft 14.0s 12s
OK AeroTech I366 5.72lb 94ft/s 621ft/s 18.2G 3,599ft 13.9s 12s
OK Cesaroni I303 5.60lb 81ft/s 616ft/s 15.6G 3,666ft 14.2s 12s
OK Cesaroni I470 5.59lb 104ft/s 659ft/s 21.4G 3,673ft 13.9s 13s
OK Cesaroni I242 5.71lb 71ft/s 602ft/s 10.2G 3,701ft 14.5s 12s
OK AeroTech I280 5.86lb 75ft/s 617ft/s 11.9G 3,707ft 14.4s 12s
OK Cesaroni I125 5.93lb 60ft/s 496ft/s 9.2G 3,718ft 15.3s 11s
OK KBA I301 6.10lb 77ft/s 619ft/s 13.9G 3,822ft 14.6s 13s
OK KBA I550 6.07lb 100ft/s 679ft/s 23.5G 3,865ft 14.3s 13s
OK Cesaroni I350 6.22lb 82ft/s 646ft/s 13.5G 3,865ft 14.5s 13s
OK AeroTech I435 5.64lb 118ft/s 675ft/s 29.1G 3,879ft 14.1s 13s
OK AeroTech I284 5.72lb 93ft/s 655ft/s 18.3G 3,959ft 14.5s 13s
OK AeroTech I500 5.77lb 101ft/s 727ft/s 21.5G 4,202ft 14.6s 13s
OK KBA J520 6.09lb 101ft/s 728ft/s 25.3G 4,244ft 14.8s 14s
OK Loki J396 6.16lb 85ft/s 709ft/s 19.4G 4,252ft 15.0s 13s
warningsW Cesaroni I540 5.82lb 109ft/s 753ft/s 23.8G 4,272ft 14.7s 14s
OK AeroTech I600 5.83lb 124ft/s 750ft/s 30.7G 4,287ft 14.7s 14s
OK Cesaroni I216 5.82lb 74ft/s 639ft/s 12.1G 4,288ft 15.4s 12s
OK AeroTech J420 5.93lb 98ft/s 728ft/s 20.2G 4,326ft 15.0s 13s
OK AeroTech I350 5.86lb 88ft/s 734ft/s 18.1G 4,331ft 15.0s 13s
OK Cesaroni J335 5.88lb 86ft/s 709ft/s 14.7G 4,333ft 15.1s 13s
OK Cesaroni J381 6.02lb 94ft/s 720ft/s 17.9G 4,345ft 15.0s 13s
OK AeroTech J350 5.97lb 117ft/s 728ft/s 30.0G 4,353ft 14.9s 13s
OK KBA J740 6.10lb 123ft/s 775ft/s 35.2G 4,366ft 14.8s 14s
OK Cesaroni J270 5.94lb 72ft/s 691ft/s 10.6G 4,375ft 15.5s 13s
OK AeroTech J340 5.77lb 99ft/s 722ft/s 22.4G 4,379ft 15.0s 13s
OK Cesaroni J285 5.81lb 82ft/s 696ft/s 13.4G 4,382ft 15.3s 13s
OK Cesaroni J316 5.84lb 85ft/s 699ft/s 15.8G 4,408ft 15.3s 13s
OK Cesaroni J357 5.82lb 93ft/s 736ft/s 18.9G 4,435ft 15.2s 13s
OK AeroTech J520 6.17lb 130ft/s 735ft/s 31.7G 4,453ft 15.0s 14s
OK AeroTech J425 5.89lb 87ft/s 777ft/s 16.6G 4,561ft 15.3s 14s
OK Cesaroni J290 5.95lb 82ft/s 719ft/s 13.8G 4,577ft 15.6s 13s
OK Loki J474 6.17lb 131ft/s 742ft/s 42.6G 4,624ft 15.2s 14s
OK Cesaroni J400 6.05lb 91ft/s 763ft/s 17.1G 4,625ft 15.4s 14s
OK AeroTech J270 5.92lb 77ft/s 726ft/s 12.6G 4,710ft 15.8s 13s
OK AeroTech J500 5.94lb 113ft/s 812ft/s 29.0G 4,801ft 15.4s 14s
OK Loki J528 6.14lb 127ft/s 827ft/s 36.4G 4,852ft 15.4s 14s
OK Loki J326 6.19lb 110ft/s 727ft/s 34.4G 4,870ft 15.8s 13s
OK AeroTech J575 6.52lb 125ft/s 842ft/s 29.8G 4,975ft 15.5s 14s
OK Cesaroni J330 6.05lb 92ft/s 791ft/s 16.1G 5,068ft 16.1s 14s
OK Cesaroni J410 6.12lb 94ft/s 825ft/s 17.8G 5,090ft 16.0s 14s
OK AeroTech J435 5.88lb 112ft/s 852ft/s 25.4G 5,142ft 15.8s 14s
OK Cesaroni J425 6.04lb 100ft/s 837ft/s 23.9G 5,143ft 15.9s 14s
OK Loki J712 6.16lb 120ft/s 894ft/s 31.1G 5,192ft 15.8s 15s
OK Cesaroni J354 6.22lb 94ft/s 822ft/s 17.8G 5,329ft 16.3s 14s
OK Cesaroni J520 6.37lb 105ft/s 893ft/s 22.1G 5,389ft 16.2s 14s
OK Cesaroni J580 6.80lb 99ft/s 909ft/s 22.5G 5,529ft 16.4s 15s
OK Loki J650 7.02lb 112ft/s 930ft/s 29.4G 5,737ft 16.6s 15s
OK AeroTech J825 6.43lb 139ft/s 1,052ft/s 40.2G 5,977ft 16.5s 15s
OK Cesaroni J394 6.57lb 85ft/s 947ft/s 14.7G 6,114ft 17.3s 15s
OK Cesaroni J595 6.41lb 119ft/s 1,012ft/s 30.9G 6,145ft 16.8s 15s
OK Cesaroni J150 6.60lb 62ft/s 682ft/s 10.1G 6,155ft 18.9s 12s
OK Cesaroni J600 6.50lb 111ft/s 1,033ft/s 24.1G 6,174ft 16.9s 15s
OK Cesaroni J453 6.63lb 101ft/s 967ft/s 23.7G 6,276ft 17.2s 15s
OK Cesaroni J420 6.43lb 106ft/s 957ft/s 26.4G 6,306ft 17.2s 15s
OK AeroTech J570 6.49lb 137ft/s 988ft/s 39.0G 6,325ft 16.9s 15s
OK Cesaroni J530 6.65lb 114ft/s 1,058ft/s 26.3G 6,739ft 17.4s 15s
OK AeroTech J510 6.88lb 124ft/s 1,068ft/s 33.0G 6,939ft 17.6s 15s
OK Loki J1000 7.02lb 149ft/s 1,198ft/s 43.9G 7,046ft 17.5s 16s
OK Loki J1026 7.08lb 135ft/s 1,253ft/s 38.4G 7,274ft 17.8s 17s
OK Loki K1127 7.08lb 141ft/s 1,238ft/s 44.1G 7,299ft 17.7s 16s
OK Loki K627 7.22lb 125ft/s 1,285ft/s 29.9G 8,440ft 18.9s 16s

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

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 AeroTech G67 speed at end of launch guide too slow (39ft/s)
failedG Loki G69 speed at end of launch guide too slow (42ft/s)
failedG AeroTech G61 speed at end of launch guide too slow (37ft/s)
failedG Loki G70 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni G69 speed at end of launch guide too slow (36ft/s)
failedG Loki G80 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni G46 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni G79 speed at end of launch guide too slow (36ft/s)
failedG Loki G66 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni G60 speed at end of launch guide too slow (37ft/s)
failedG AeroTech G69 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni G78 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (27ft/s)
failedA Contrail G300 rocket doesn't reach a safe altitude (233ft)
failedG AeroTech H73 speed at end of launch guide too slow (35ft/s)
failedG AeroTech H100 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni H123 speed at end of launch guide too slow (47ft/s)
failedG AeroTech H112 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni H110 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni H100 speed at end of launch guide too slow (45ft/s)
failedG AeroTech H45 speed at end of launch guide too slow (37ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (27ft/s)
failedG Cesaroni I55 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni J94 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.)

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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