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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 97 motors that fit and appear to have enough thrust (703 motors didn't fit, 11 motors failed safety checks). 108 motor had thrust curves available and 232 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:   King Kraken (.86 Cd)
Owner: Robert Belknap
Body Diameter: 3.00in
Dry Weight: 34.4oz
MMT Diameter: 38.0mm
MMT Length: 14.00in
CD: 0.86

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 42.9oz 53ft/s 232ft/s 7.2G 787ft 7.1s 5s
OK AeroTech G67 41.5oz 49ft/s 243ft/s 6.8G 810ft 7.3s 6s
OK AeroTech G339 40.8oz 112ft/s 304ft/s 32.2G 858ft 6.8s 6s
OK Loki G70 43.0oz 53ft/s 244ft/s 7.5G 860ft 7.4s 6s
OK Loki G80 43.4oz 56ft/s 254ft/s 8.3G 873ft 7.3s 6s
OK Loki G94 42.9oz 60ft/s 271ft/s 10.0G 913ft 7.4s 6s
OK Cesaroni G185 41.1oz 76ft/s 330ft/s 16.8G 991ft 7.4s 7s
OK Loki G66 43.3oz 56ft/s 266ft/s 8.6G 1,016ft 8.0s 6s
OK Cesaroni G60 41.7oz 48ft/s 286ft/s 6.4G 1,077ft 8.2s 6s
OK Cesaroni G115 41.3oz 62ft/s 333ft/s 10.4G 1,109ft 7.9s 7s
OK Cesaroni G78 41.4oz 49ft/s 307ft/s 10.3G 1,121ft 8.2s 6s
OK Loki H100 46.3oz 60ft/s 385ft/s 9.9G 1,522ft 9.1s 7s
warningsW AeroTech H283 43.2oz 99ft/s 484ft/s 26.8G 1,535ft 8.6s 8s
OK AeroTech H148 45.4oz 72ft/s 444ft/s 14.4G 1,635ft 9.2s 8s
OK AeroTech H130 42.8oz 86ft/s 435ft/s 20.8G 1,642ft 9.0s 7s
OK AeroTech H669 43.3oz 152ft/s 574ft/s 91.0G 1,655ft 8.6s 8s
OK AeroTech H123 44.2oz 62ft/s 425ft/s 11.1G 1,777ft 9.6s 7s
OK AeroTech H219 43.7oz 91ft/s 533ft/s 23.2G 1,782ft 9.1s 8s
OK AeroTech H100 43.7oz 56ft/s 430ft/s 9.4G 1,788ft 9.7s 7s
OK Loki H144 46.3oz 83ft/s 467ft/s 18.3G 1,795ft 9.4s 8s
OK Cesaroni H123 44.9oz 56ft/s 481ft/s 10.6G 1,808ft 9.7s 8s
OK Loki H90 46.3oz 61ft/s 410ft/s 10.4G 1,821ft 9.9s 7s
OK Cesaroni H143 46.7oz 60ft/s 493ft/s 11.0G 1,824ft 9.7s 8s
OK Loki H125 46.5oz 74ft/s 447ft/s 14.9G 1,824ft 9.7s 8s
OK AeroTech H242 43.8oz 82ft/s 534ft/s 18.5G 1,862ft 9.4s 8s
OK Cesaroni H400 44.5oz 104ft/s 627ft/s 34.7G 1,877ft 9.1s 8s
OK Loki H160 46.3oz 92ft/s 504ft/s 21.4G 1,894ft 9.5s 8s
OK Cesaroni H120 44.9oz 59ft/s 504ft/s 10.9G 1,999ft 10.0s 8s
OK AeroTech H112 47.8oz 51ft/s 430ft/s 7.3G 2,006ft 10.6s 7s
OK Cesaroni H125 44.8oz 59ft/s 528ft/s 10.7G 2,035ft 10.1s 8s
OK Cesaroni H225 41.3oz 89ft/s 642ft/s 21.5G 2,044ft 9.5s 8s
OK Cesaroni H110 45.9oz 55ft/s 493ft/s 8.4G 2,053ft 10.3s 8s
OK AeroTech H178 45.9oz 68ft/s 587ft/s 15.1G 2,087ft 9.9s 8s
OK Cesaroni H152 45.0oz 70ft/s 553ft/s 16.0G 2,089ft 10.0s 8s
OK AeroTech H550 45.6oz 140ft/s 752ft/s 50.7G 2,141ft 9.4s 9s
OK AeroTech H550 45.8oz 139ft/s 741ft/s 50.1G 2,159ft 9.5s 9s
OK AeroTech H999 46.1oz 183ft/s 792ft/s 124.6G 2,166ft 9.4s 9s
warningsW Cesaroni H565 47.2oz 131ft/s 753ft/s 46.6G 2,179ft 9.5s 9s
OK Cesaroni H100 46.0oz 56ft/s 497ft/s 8.3G 2,181ft 10.7s 8s
OK AeroTech I218 47.6oz 87ft/s 624ft/s 20.7G 2,240ft 10.0s 9s
OK AeroTech H170 46.1oz 75ft/s 602ft/s 14.6G 2,288ft 10.2s 8s
OK AeroTech I180 48.0oz 97ft/s 574ft/s 26.2G 2,296ft 10.1s 8s
OK AeroTech I161 47.4oz 74ft/s 587ft/s 15.5G 2,361ft 10.4s 8s
OK Cesaroni I180 48.3oz 66ft/s 641ft/s 14.0G 2,376ft 10.4s 8s
OK AeroTech I245 47.3oz 100ft/s 661ft/s 30.3G 2,386ft 10.0s 9s
OK AeroTech I357 46.5oz 104ft/s 706ft/s 28.4G 2,391ft 10.0s 9s
OK AeroTech I225 51.6oz 74ft/s 648ft/s 17.6G 2,417ft 10.4s 9s
OK Cesaroni I566 48.0oz 118ft/s 847ft/s 45.1G 2,419ft 9.8s 9s
OK AeroTech I175 46.7oz 83ft/s 586ft/s 18.3G 2,443ft 10.7s 9s
OK AeroTech I140 47.0oz 67ft/s 566ft/s 12.6G 2,447ft 10.7s 8s
OK Cesaroni I212 51.2oz 73ft/s 673ft/s 15.8G 2,462ft 10.5s 9s
OK Cesaroni I800 50.6oz 143ft/s 935ft/s 60.7G 2,573ft 10.0s 10s
OK AeroTech I1299 49.3oz 197ft/s 986ft/s 110.5G 2,580ft 9.9s 10s
OK Cesaroni I345 48.4oz 102ft/s 811ft/s 28.0G 2,610ft 10.3s 9s
OK AeroTech I285 51.8oz 92ft/s 753ft/s 25.2G 2,666ft 10.6s 9s
OK Cesaroni I195 49.2oz 71ft/s 691ft/s 16.3G 2,679ft 10.8s 9s
OK AeroTech I154 51.8oz 60ft/s 559ft/s 10.7G 2,683ft 11.5s 8s
OK AeroTech I305 54.9oz 91ft/s 759ft/s 25.8G 2,720ft 10.6s 9s
OK Cesaroni I236 48.6oz 85ft/s 750ft/s 22.1G 2,736ft 10.7s 9s
OK Cesaroni I170 48.3oz 74ft/s 708ft/s 15.8G 2,746ft 10.9s 9s
OK AeroTech I300 50.0oz 104ft/s 788ft/s 32.5G 2,771ft 10.5s 9s
OK Cesaroni I175 49.9oz 71ft/s 687ft/s 12.7G 2,774ft 11.1s 9s
OK AeroTech I211 50.5oz 88ft/s 708ft/s 21.8G 2,801ft 10.8s 9s
OK Cesaroni I223 51.9oz 73ft/s 751ft/s 16.6G 2,805ft 10.9s 9s
OK AeroTech I195 54.6oz 88ft/s 695ft/s 22.8G 2,828ft 11.0s 9s
OK Loki I316 53.5oz 108ft/s 796ft/s 32.7G 2,902ft 10.7s 9s
OK Loki I405 53.6oz 142ft/s 872ft/s 53.1G 2,950ft 10.6s 9s
OK Cesaroni I287 55.8oz 85ft/s 825ft/s 20.1G 2,967ft 11.0s 9s
OK Loki I210 53.5oz 99ft/s 740ft/s 28.8G 3,071ft 11.2s 9s
OK Cesaroni I285 52.3oz 89ft/s 849ft/s 23.3G 3,093ft 11.1s 9s
OK Loki I430 53.5oz 109ft/s 957ft/s 34.8G 3,093ft 10.9s 10s
OK Loki I377 54.2oz 120ft/s 865ft/s 42.8G 3,095ft 10.9s 10s
OK Cesaroni I470 51.9oz 115ft/s 1,009ft/s 37.7G 3,106ft 10.7s 10s
OK AeroTech I366 54.0oz 107ft/s 904ft/s 31.7G 3,122ft 10.9s 9s
OK AeroTech I327 56.6oz 99ft/s 894ft/s 26.5G 3,136ft 11.1s 9s
OK AeroTech I364 58.4oz 95ft/s 873ft/s 24.2G 3,147ft 11.1s 9s
OK Cesaroni I255 52.7oz 83ft/s 832ft/s 20.5G 3,154ft 11.2s 9s
OK AMW I297 55.3oz 90ft/s 879ft/s 23.3G 3,171ft 11.2s 9s
warningsW Loki I110 55.2oz 64ft/s 615ft/s 16.2G 3,198ft 12.2s 8s
OK Cesaroni I303 52.1oz 98ft/s 895ft/s 27.6G 3,201ft 11.1s 9s
OK AeroTech I435 52.7oz 135ft/s 996ft/s 50.7G 3,204ft 10.8s 9s
OK AeroTech I280 56.2oz 84ft/s 879ft/s 20.6G 3,256ft 11.4s 9s
OK Cesaroni I242 53.8oz 82ft/s 840ft/s 18.1G 3,311ft 11.5s 9s
OK AeroTech I284 54.0oz 105ft/s 917ft/s 31.0G 3,324ft 11.1s 9s
OK Cesaroni I350 62.0oz 91ft/s 918ft/s 22.3G 3,350ft 11.5s 10s
OK AeroTech I500 54.8oz 119ft/s 1,076ft/s 36.9G 3,366ft 11.0s 10s
OK AeroTech I600 55.7oz 132ft/s 1,101ft/s 52.2G 3,378ft 11.0s 10s
OK AeroTech J350 57.9oz 129ft/s 1,019ft/s 50.2G 3,480ft 11.2s 10s
OK AeroTech I350 56.2oz 99ft/s 1,034ft/s 29.8G 3,485ft 11.3s 10s
OK AeroTech J420 57.4oz 110ft/s 1,018ft/s 34.2G 3,496ft 11.4s 10s
OK AeroTech J340 54.8oz 112ft/s 1,000ft/s 38.5G 3,511ft 11.2s 9s
OK Cesaroni J357 55.6oz 107ft/s 1,020ft/s 32.3G 3,570ft 11.4s 10s
OK AeroTech J425 56.7oz 94ft/s 1,100ft/s 26.8G 3,602ft 11.4s 10s
OK Cesaroni J285 55.4oz 93ft/s 948ft/s 22.4G 3,633ft 11.7s 9s
OK AeroTech J500 57.5oz 136ft/s 1,121ft/s 48.7G 3,672ft 11.3s 10s
OK AeroTech I59 51.6oz 61ft/s 448ft/s 10.5G 3,721ft 14.7s 6s
OK AeroTech J270 57.1oz 86ft/s 962ft/s 21.6G 3,821ft 11.9s 9s

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 G61 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni G69 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni G46 speed at end of launch guide too slow (39ft/s)
failedG Cesaroni G79 speed at end of launch guide too slow (44ft/s)
failedG AeroTech G69 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (36ft/s)
failedG AeroTech H73 speed at end of launch guide too slow (44ft/s)
failedG AeroTech H45 speed at end of launch guide too slow (46ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni I55 speed at end of launch guide too slow (37ft/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.)

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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