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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 118 motors that fit and appear to have enough thrust (690 motors didn't fit, 3 motors failed safety checks). 121 motor had thrust curves available and 254 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:   Soothsayer 38mm
Owner: Jim Lane
Body Diameter: 3.00in
Dry Weight: 31.0oz
MMT Diameter: 38.0mm
MMT Length: 15.00in
CD: 0.70

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 Loki G69 39.5oz 63ft/s 257ft/s 7.9G 922ft 7.6s 6s
OK AeroTech G61 37.8oz 56ft/s 257ft/s 6.7G 950ft 7.8s 6s
OK AeroTech G67 38.1oz 61ft/s 271ft/s 7.6G 952ft 7.8s 6s
OK AeroTech G339 37.4oz 135ft/s 334ft/s 35.4G 1,001ft 7.3s 7s
OK Loki G70 39.5oz 63ft/s 270ft/s 8.2G 1,007ft 7.9s 6s
OK Loki G80 40.0oz 67ft/s 280ft/s 9.1G 1,019ft 7.8s 6s
OK Loki G94 39.5oz 72ft/s 298ft/s 11.0G 1,065ft 7.9s 6s
OK Cesaroni G46 37.9oz 48ft/s 258ft/s 7.4G 1,085ft 8.6s 6s
OK Cesaroni G69 37.9oz 57ft/s 300ft/s 7.2G 1,144ft 8.5s 7s
OK Cesaroni G79 39.0oz 54ft/s 318ft/s 7.4G 1,144ft 8.4s 7s
OK Cesaroni G185 37.6oz 91ft/s 364ft/s 18.5G 1,155ft 7.9s 7s
OK Loki G66 39.8oz 68ft/s 295ft/s 9.5G 1,184ft 8.5s 6s
OK Cesaroni G58 38.5oz 48ft/s 300ft/s 7.3G 1,222ft 8.9s 6s
OK AeroTech G69 38.1oz 57ft/s 323ft/s 6.7G 1,229ft 8.6s 7s
OK Cesaroni G60 38.3oz 59ft/s 318ft/s 7.1G 1,258ft 8.8s 7s
OK Cesaroni G115 37.9oz 75ft/s 369ft/s 11.5G 1,292ft 8.5s 7s
OK Cesaroni G78 37.9oz 59ft/s 341ft/s 11.4G 1,307ft 8.8s 7s
OK AeroTech H73 41.9oz 54ft/s 365ft/s 6.3G 1,644ft 10.0s 7s
OK Loki H100 42.8oz 71ft/s 423ft/s 10.9G 1,752ft 9.7s 8s
warningsW AeroTech H283 39.7oz 122ft/s 531ft/s 29.3G 1,768ft 9.1s 8s
OK AeroTech H148 41.9oz 87ft/s 488ft/s 15.7G 1,880ft 9.7s 8s
OK AeroTech H130 39.4oz 108ft/s 479ft/s 22.7G 1,887ft 9.5s 8s
OK AeroTech H669 39.9oz 187ft/s 628ft/s 99.0G 1,903ft 9.2s 9s
OK AeroTech H123 40.7oz 76ft/s 470ft/s 12.2G 2,041ft 10.2s 8s
OK AeroTech H219 40.2oz 107ft/s 585ft/s 25.3G 2,046ft 9.7s 9s
OK AeroTech H100 40.2oz 71ft/s 476ft/s 10.4G 2,054ft 10.3s 8s
OK Loki H144 42.9oz 102ft/s 512ft/s 19.9G 2,058ft 10.0s 8s
OK Cesaroni H123 41.5oz 69ft/s 530ft/s 11.6G 2,076ft 10.3s 8s
OK Loki H90 42.8oz 73ft/s 452ft/s 11.3G 2,091ft 10.5s 8s
OK Loki H125 43.1oz 90ft/s 492ft/s 16.2G 2,092ft 10.3s 8s
OK Cesaroni H143 43.2oz 72ft/s 542ft/s 12.1G 2,093ft 10.3s 9s
OK AeroTech H242 40.3oz 99ft/s 587ft/s 20.2G 2,135ft 10.0s 9s
OK Cesaroni H400 41.0oz 127ft/s 686ft/s 37.9G 2,153ft 9.7s 9s
OK Loki H160 42.8oz 108ft/s 552ft/s 23.3G 2,170ft 10.1s 9s
OK Cesaroni H120 41.4oz 72ft/s 556ft/s 11.9G 2,291ft 10.6s 8s
OK AeroTech H112 44.4oz 61ft/s 475ft/s 8.0G 2,296ft 11.2s 8s
OK Cesaroni H125 41.3oz 72ft/s 581ft/s 11.8G 2,332ft 10.7s 9s
OK Cesaroni H225 37.8oz 105ft/s 709ft/s 23.5G 2,337ft 10.0s 9s
OK Cesaroni H110 42.5oz 66ft/s 544ft/s 9.2G 2,350ft 10.9s 8s
OK AeroTech H178 42.4oz 82ft/s 645ft/s 16.5G 2,385ft 10.5s 9s
OK Cesaroni H152 41.5oz 85ft/s 609ft/s 17.4G 2,390ft 10.6s 9s
OK AeroTech H550 42.1oz 162ft/s 822ft/s 55.1G 2,445ft 10.0s 9s
OK AeroTech H550 42.4oz 161ft/s 809ft/s 54.4G 2,468ft 10.1s 10s
OK AeroTech H999 42.7oz 218ft/s 862ft/s 134.9G 2,477ft 10.0s 10s
warningsW Cesaroni H565 43.8oz 160ft/s 821ft/s 50.5G 2,491ft 10.1s 10s
OK Cesaroni H100 42.5oz 66ft/s 550ft/s 9.0G 2,495ft 11.3s 9s
OK AeroTech I218 44.1oz 103ft/s 684ft/s 22.4G 2,558ft 10.6s 9s
OK AeroTech H170 42.6oz 87ft/s 662ft/s 15.8G 2,609ft 10.8s 9s
OK AeroTech I180 44.6oz 123ft/s 629ft/s 28.3G 2,618ft 10.7s 9s
OK AeroTech I161 43.9oz 91ft/s 646ft/s 16.8G 2,691ft 11.0s 9s
OK Cesaroni I180 44.9oz 80ft/s 702ft/s 15.2G 2,709ft 11.0s 9s
OK AeroTech I245 43.9oz 119ft/s 725ft/s 32.8G 2,719ft 10.6s 9s
OK AeroTech I357 43.1oz 124ft/s 774ft/s 30.7G 2,725ft 10.6s 9s
OK AeroTech I225 48.1oz 90ft/s 709ft/s 19.1G 2,752ft 11.0s 9s
OK Cesaroni I566 44.6oz 146ft/s 924ft/s 49.1G 2,762ft 10.5s 10s
OK AeroTech I140 43.6oz 81ft/s 624ft/s 13.8G 2,788ft 11.3s 9s
OK AeroTech I175 43.3oz 103ft/s 643ft/s 19.8G 2,799ft 11.4s 9s
OK Cesaroni I212 47.8oz 88ft/s 737ft/s 17.3G 2,804ft 11.2s 9s
OK AeroTech H45 43.9oz 56ft/s 440ft/s 6.0G 2,882ft 12.9s 7s
OK Cesaroni I800 47.1oz 174ft/s 1,015ft/s 65.9G 2,935ft 10.7s 10s
OK AeroTech I1299 45.9oz 237ft/s 1,070ft/s 119.9G 2,945ft 10.5s 10s
OK Cesaroni I345 44.9oz 119ft/s 887ft/s 30.3G 2,974ft 10.9s 10s
OK AeroTech I285 48.4oz 111ft/s 821ft/s 27.2G 3,035ft 11.2s 10s
OK Cesaroni I195 45.7oz 88ft/s 759ft/s 17.7G 3,050ft 11.5s 9s
OK AeroTech I154 48.4oz 73ft/s 615ft/s 11.5G 3,050ft 12.1s 9s
OK AeroTech I305 51.5oz 113ft/s 826ft/s 27.7G 3,088ft 11.2s 10s
OK Cesaroni I236 45.1oz 99ft/s 822ft/s 23.8G 3,112ft 11.3s 10s
OK Cesaroni I170 44.8oz 88ft/s 778ft/s 17.1G 3,124ft 11.6s 9s
OK AeroTech I300 46.6oz 126ft/s 862ft/s 35.0G 3,150ft 11.2s 10s
OK Cesaroni I175 46.4oz 81ft/s 755ft/s 13.7G 3,153ft 11.7s 9s
OK AeroTech I211 47.0oz 105ft/s 776ft/s 23.5G 3,181ft 11.4s 9s
OK Cesaroni I223 48.4oz 89ft/s 822ft/s 17.9G 3,187ft 11.6s 10s
OK AeroTech I195 51.2oz 107ft/s 758ft/s 24.5G 3,210ft 11.6s 9s
OK Loki I316 50.0oz 127ft/s 867ft/s 35.1G 3,301ft 11.4s 10s
OK Loki I405 50.2oz 168ft/s 948ft/s 56.8G 3,354ft 11.3s 10s
OK Cesaroni I287 52.3oz 100ft/s 900ft/s 21.8G 3,369ft 11.7s 10s
OK Loki I210 50.0oz 114ft/s 808ft/s 30.8G 3,488ft 11.8s 10s
OK Cesaroni I285 48.8oz 110ft/s 929ft/s 25.1G 3,510ft 11.8s 10s
OK Loki I377 50.8oz 142ft/s 942ft/s 45.7G 3,519ft 11.6s 10s
OK Loki I430 50.0oz 127ft/s 1,042ft/s 37.3G 3,520ft 11.6s 10s
OK Cesaroni I470 48.5oz 135ft/s 1,101ft/s 40.4G 3,530ft 11.4s 10s
OK AeroTech I366 50.6oz 128ft/s 987ft/s 33.9G 3,544ft 11.6s 10s
OK AeroTech I327 53.2oz 114ft/s 973ft/s 28.3G 3,557ft 11.7s 10s
OK AeroTech I364 54.9oz 109ft/s 950ft/s 26.1G 3,567ft 11.8s 10s
OK Cesaroni I255 49.2oz 103ft/s 912ft/s 22.1G 3,579ft 11.9s 10s
OK AMW I297 51.8oz 111ft/s 959ft/s 25.0G 3,596ft 11.8s 10s
warningsW Loki I110 51.8oz 77ft/s 674ft/s 17.4G 3,625ft 12.8s 9s
OK Cesaroni I303 48.6oz 114ft/s 980ft/s 29.6G 3,631ft 11.7s 10s
OK AeroTech I435 49.3oz 163ft/s 1,086ft/s 54.3G 3,637ft 11.5s 10s
OK AeroTech I280 52.7oz 104ft/s 961ft/s 22.0G 3,690ft 12.0s 10s
OK KBA I550 56.1oz 131ft/s 1,107ft/s 39.9G 3,750ft 12.0s 11s
OK Cesaroni I242 50.4oz 99ft/s 920ft/s 19.4G 3,752ft 12.2s 10s
OK AeroTech I284 50.6oz 128ft/s 1,002ft/s 33.4G 3,766ft 11.8s 10s
OK Cesaroni I350 58.6oz 112ft/s 997ft/s 23.7G 3,800ft 12.2s 10s
OK AeroTech I500 51.3oz 139ft/s 1,171ft/s 39.5G 3,820ft 11.7s 10s
warningsW Cesaroni I540 52.1oz 146ft/s 1,214ft/s 43.0G 3,830ft 11.7s 11s
OK AeroTech I600 52.2oz 158ft/s 1,197ft/s 55.7G 3,834ft 11.6s 10s
OK KBA I301 56.6oz 105ft/s 945ft/s 24.8G 3,864ft 12.5s 11s
OK AeroTech J350 54.5oz 152ft/s 1,109ft/s 53.5G 3,943ft 11.9s 10s
OK AeroTech I350 52.7oz 124ft/s 1,129ft/s 32.1G 3,950ft 12.0s 10s
OK KBA J520 56.5oz 134ft/s 1,147ft/s 44.4G 3,957ft 12.2s 11s
OK KBA J740 56.5oz 157ft/s 1,271ft/s 58.6G 3,957ft 12.0s 11s
OK AeroTech J420 53.9oz 128ft/s 1,109ft/s 36.5G 3,966ft 12.0s 10s
OK AeroTech J340 51.4oz 130ft/s 1,093ft/s 41.2G 3,969ft 11.8s 10s
OK Cesaroni J335 53.1oz 115ft/s 1,072ft/s 27.0G 4,037ft 12.2s 10s
OK Cesaroni J357 52.2oz 124ft/s 1,115ft/s 34.5G 4,044ft 12.1s 10s
OK AeroTech J425 53.3oz 117ft/s 1,202ft/s 28.9G 4,082ft 12.1s 11s
OK Cesaroni J285 52.0oz 107ft/s 1,037ft/s 24.1G 4,116ft 12.4s 10s
OK Cesaroni I125 53.8oz 86ft/s 703ft/s 16.9G 4,123ft 13.5s 9s
OK Cesaroni J270 54.1oz 98ft/s 1,014ft/s 18.6G 4,157ft 12.6s 10s
OK AeroTech J500 54.1oz 160ft/s 1,222ft/s 51.9G 4,162ft 12.0s 11s
OK Cesaroni J316 52.4oz 114ft/s 1,046ft/s 29.0G 4,189ft 12.5s 10s
OK Cesaroni I216 52.2oz 102ft/s 927ft/s 22.4G 4,197ft 12.7s 10s
OK AeroTech I59 48.2oz 72ft/s 489ft/s 11.3G 4,220ft 15.4s 7s
OK Cesaroni J290 54.3oz 112ft/s 1,048ft/s 25.1G 4,236ft 12.5s 10s
OK AeroTech J270 53.6oz 106ft/s 1,052ft/s 23.0G 4,318ft 12.6s 10s
OK AeroTech J435 53.0oz 148ft/s 1,263ft/s 45.9G 4,381ft 12.2s 10s
OK Cesaroni J94 54.3oz 67ft/s 661ft/s 9.8G 4,821ft 15.3s 8s

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 Cesaroni G50 speed at end of launch guide too slow (44ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni I55 speed at end of launch guide too slow (46ft/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.)

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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