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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 117 motors that fit and appear to have enough thrust (686 motors didn't fit, 8 motors failed safety checks). 125 motor had thrust curves available and 239 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:   Extreme Darkstar
Owner: Wayne Comfort
Body Diameter: 4.00in
Dry Weight: 16.22lb
MMT Diameter: 75.0mm
MMT Length: 44.00in
CD: 0.40

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 K707 24.32lb 69ft/s 350ft/s 11.8G 2,132ft 12.0s 10s
OK Contrail K630 24.05lb 53ft/s 362ft/s 7.4G 2,251ft 12.6s 10s
OK Contrail K456 24.39lb 59ft/s 375ft/s 7.3G 2,740ft 13.9s 10s
OK AeroTech K1499 20.06lb 94ft/s 459ft/s 18.6G 2,891ft 13.4s 13s
OK Contrail K678 25.15lb 67ft/s 447ft/s 9.4G 3,370ft 15.0s 12s
OK Contrail K777 25.15lb 80ft/s 451ft/s 15.0G 3,420ft 15.0s 12s
OK Contrail K543 24.17lb 60ft/s 516ft/s 7.4G 4,395ft 17.3s 14s
OK Cesaroni K735 21.75lb 53ft/s 583ft/s 8.6G 4,755ft 17.6s 15s
OK Contrail K404 25.37lb 50ft/s 509ft/s 4.9G 4,980ft 19.2s 13s
OK Contrail K888 25.42lb 75ft/s 605ft/s 11.1G 5,383ft 18.5s 16s
OK AeroTech K780 22.69lb 60ft/s 673ft/s 8.8G 5,971ft 19.5s 16s
OK Cesaroni K555 22.30lb 48ft/s 655ft/s 5.7G 6,165ft 20.5s 16s
OK AeroTech K560 22.27lb 53ft/s 647ft/s 7.2G 6,377ft 20.5s 16s
OK Hypertek L355 24.94lb 49ft/s 539ft/s 5.0G 6,377ft 22.2s 13s
OK Cesaroni K2000 21.65lb 98ft/s 769ft/s 25.8G 6,384ft 19.0s 18s
OK Cesaroni K510 21.93lb 54ft/s 650ft/s 6.0G 6,474ft 20.9s 16s
OK Cesaroni K661 21.79lb 54ft/s 696ft/s 7.0G 6,493ft 20.5s 17s
OK Cesaroni K1085 21.58lb 71ft/s 747ft/s 11.7G 6,525ft 19.8s 18s
OK Hypertek L475 24.81lb 50ft/s 618ft/s 5.3G 6,560ft 21.5s 15s
OK AeroTech K1000 21.96lb 73ft/s 757ft/s 11.0G 6,808ft 20.2s 18s
OK Cesaroni L585 22.36lb 53ft/s 718ft/s 5.8G 7,125ft 21.7s 17s
OK Hypertek L535 24.92lb 57ft/s 676ft/s 6.8G 7,283ft 22.0s 16s
OK Hypertek L550 24.81lb 57ft/s 683ft/s 6.6G 7,562ft 22.4s 16s
OK Hypertek L610 24.93lb 58ft/s 705ft/s 7.3G 7,572ft 22.2s 17s
OK Cesaroni L820 23.76lb 54ft/s 808ft/s 8.5G 7,850ft 22.2s 18s
OK Loki L780 23.94lb 49ft/s 822ft/s 8.3G 8,088ft 22.5s 19s
OK Cesaroni L910 21.99lb 67ft/s 846ft/s 10.0G 8,153ft 22.1s 19s
OK Gorilla L425 23.94lb 54ft/s 721ft/s 6.1G 9,061ft 24.8s 17s
OK Gorilla L789 23.67lb 55ft/s 886ft/s 8.0G 9,107ft 23.6s 19s
OK Cesaroni L645 24.49lb 52ft/s 850ft/s 6.3G 9,301ft 24.4s 19s
OK Cesaroni L3200 23.42lb 122ft/s 1,038ft/s 36.9G 9,360ft 22.3s 21s
OK AeroTech L1150 24.32lb 73ft/s 962ft/s 11.6G 9,624ft 23.5s 20s
OK Loki L930 24.02lb 66ft/s 949ft/s 9.9G 9,871ft 24.1s 20s
OK AeroTech L875 26.31lb 59ft/s 931ft/s 8.4G 9,908ft 24.5s 20s
OK Gorilla L985 24.23lb 56ft/s 984ft/s 10.0G 9,935ft 24.2s 21s
OK Gorilla L1150 23.94lb 69ft/s 987ft/s 16.3G 10,005ft 23.8s 21s
OK Cesaroni L995 24.14lb 72ft/s 968ft/s 11.4G 10,099ft 24.1s 20s
OK AeroTech L900 26.63lb 58ft/s 940ft/s 8.4G 10,108ft 24.7s 20s
OK AeroTech L1040 26.62lb 62ft/s 960ft/s 10.4G 10,120ft 24.4s 20s
OK AeroTech L850 24.47lb 67ft/s 940ft/s 10.2G 10,145ft 24.3s 20s
OK Cesaroni L851 24.57lb 59ft/s 965ft/s 8.4G 10,229ft 24.7s 20s
OK Gorilla L1112 24.22lb 75ft/s 1,004ft/s 11.4G 10,299ft 24.2s 21s
OK Cesaroni L800 23.96lb 67ft/s 952ft/s 10.2G 10,523ft 24.9s 20s
OK AeroTech L1256 24.50lb 77ft/s 1,036ft/s 13.0G 10,525ft 24.3s 21s
OK Cesaroni L1355 27.16lb 77ft/s 1,027ft/s 14.7G 10,536ft 24.3s 21s
OK Cesaroni L1050 23.82lb 69ft/s 1,019ft/s 10.8G 10,592ft 24.6s 21s
OK AeroTech L1520 24.27lb 84ft/s 1,071ft/s 15.5G 10,600ft 24.0s 21s
OK Cesaroni L1720 23.59lb 87ft/s 1,111ft/s 18.3G 10,656ft 23.9s 22s
OK Loki L840 24.48lb 65ft/s 981ft/s 10.3G 10,816ft 25.0s 20s
OK AeroTech L1390 24.77lb 77ft/s 1,084ft/s 14.6G 11,029ft 24.6s 22s
OK Loki L1482 24.02lb 76ft/s 1,126ft/s 16.0G 11,058ft 24.5s 22s
OK AeroTech L1170 27.22lb 74ft/s 1,049ft/s 11.7G 11,082ft 25.0s 21s
OK AeroTech L1250 28.67lb 70ft/s 1,022ft/s 11.2G 11,119ft 25.3s 21s
OK Gorilla L1065 28.04lb 72ft/s 1,033ft/s 13.8G 11,539ft 25.4s 21s
OK Cesaroni L1350 24.09lb 78ft/s 1,190ft/s 13.9G 12,288ft 25.6s 22s
OK AMW L1290 28.12lb 66ft/s 1,132ft/s 11.6G 12,331ft 26.3s 23s
OK AeroTech L1420 26.28lb 78ft/s 1,215ft/s 14.1G 12,682ft 26.1s 23s
OK AeroTech L1365 27.04lb 76ft/s 1,195ft/s 13.0G 12,851ft 26.4s 23s
OK Cesaroni L1685 29.56lb 92ft/s 1,209ft/s 16.9G 12,892ft 26.2s 23s
OK Cesaroni L1410 27.50lb 71ft/s 1,220ft/s 13.4G 12,979ft 26.6s 23s
OK Cesaroni L1395 25.75lb 82ft/s 1,289ft/s 14.8G 13,650ft 26.8s 23s
OK AeroTech L2200 26.76lb 105ft/s 1,336ft/s 26.5G 13,728ft 26.3s 24s
OK Loki M1200 28.05lb 62ft/s 1,222ft/s 11.9G 13,729ft 27.5s 23s
OK Cesaroni L1115 25.93lb 79ft/s 1,210ft/s 13.3G 13,742ft 27.3s 23s
OK Cesaroni L2375 25.39lb 103ft/s 1,400ft/s 23.6G 13,748ft 26.2s 24s
OK Gorilla M745 28.61lb 69ft/s 1,038ft/s 11.4G 13,892ft 28.3s 21s
OK AeroTech M1350 26.82lb 80ft/s 1,262ft/s 14.2G 13,984ft 27.1s 23s
OK Gorilla M1355 28.35lb 74ft/s 1,254ft/s 14.8G 14,078ft 27.4s 24s
OK Cesaroni M1101 27.11lb 71ft/s 1,241ft/s 10.9G 14,130ft 27.7s 23s
OK AeroTech M1500 27.01lb 82ft/s 1,312ft/s 14.0G 14,187ft 27.3s 24s
OK AeroTech M1550 28.66lb 85ft/s 1,323ft/s 15.7G 14,486ft 27.5s 24s
OK Loki M900 28.41lb 55ft/s 1,204ft/s 7.8G 14,599ft 29.0s 23s
OK AeroTech M1297 26.44lb 88ft/s 1,316ft/s 16.0G 14,789ft 27.7s 23s
OK AeroTech M1780 26.61lb 99ft/s 1,392ft/s 19.4G 14,848ft 27.3s 24s
OK Gorilla M1610 31.47lb 75ft/s 1,308ft/s 16.1G 14,891ft 28.1s 24s
OK Cesaroni M1230 26.90lb 71ft/s 1,320ft/s 12.2G 14,955ft 28.1s 23s
OK Cesaroni M2250 25.95lb 105ft/s 1,474ft/s 23.3G 14,972ft 27.0s 25s
OK AeroTech M2050 26.27lb 99ft/s 1,446ft/s 21.0G 15,116ft 27.5s 25s
OK Gorilla M1665 28.61lb 85ft/s 1,358ft/s 17.8G 15,121ft 27.8s 24s
OK Cesaroni M1830 26.19lb 92ft/s 1,456ft/s 18.2G 15,323ft 27.6s 24s
OK Cesaroni M1770 29.43lb 82ft/s 1,430ft/s 15.4G 15,398ft 28.1s 25s
OK Cesaroni M2075 32.07lb 95ft/s 1,394ft/s 19.9G 15,484ft 28.2s 25s
OK Cesaroni M1160 28.78lb 64ft/s 1,335ft/s 10.4G 15,573ft 29.0s 24s
OK Gorilla M1952 28.22lb 104ft/s 1,453ft/s 20.7G 15,753ft 28.0s 25s
OK Cesaroni M1670 27.75lb 85ft/s 1,416ft/s 16.9G 16,117ft 28.8s 25s
OK Cesaroni M1810 28.16lb 85ft/s 1,513ft/s 16.7G 16,194ft 28.5s 25s
OK AeroTech M650 27.52lb 70ft/s 1,106ft/s 9.9G 16,213ft 30.4s 19s
OK Cesaroni M3100 27.28lb 115ft/s 1,655ft/s 31.5G 16,314ft 27.7s 26s
OK Cesaroni M1401 28.95lb 74ft/s 1,429ft/s 12.1G 16,366ft 29.1s 24s
OK Loki M1882 28.42lb 93ft/s 1,526ft/s 20.8G 16,418ft 28.4s 25s
OK Cesaroni M1675 27.73lb 87ft/s 1,502ft/s 16.6G 16,455ft 28.6s 25s
OK Cesaroni M1400 27.91lb 88ft/s 1,424ft/s 16.8G 16,571ft 29.0s 24s
OK AMW M2050 31.94lb 86ft/s 1,488ft/s 18.2G 16,760ft 29.1s 26s
OK Cesaroni M2080 31.74lb 91ft/s 1,514ft/s 18.2G 16,788ft 28.9s 25s
OK Cesaroni M1300 28.69lb 102ft/s 1,387ft/s 21.5G 16,807ft 29.2s 24s
OK Loki M1650 28.63lb 109ft/s 1,449ft/s 28.4G 16,864ft 28.9s 24s
OK Loki M2550 28.41lb 107ft/s 1,653ft/s 24.4G 17,149ft 28.5s 26s
OK AeroTech M1315 28.66lb 78ft/s 1,419ft/s 13.1G 17,239ft 29.6s 24s
OK Cesaroni M3700 28.96lb 120ft/s 1,740ft/s 33.3G 17,531ft 28.6s 27s
OK Cesaroni M1540 29.24lb 90ft/s 1,527ft/s 17.5G 17,549ft 29.5s 25s
OK Loki M1969 32.07lb 86ft/s 1,568ft/s 17.3G 17,804ft 29.7s 26s
OK Gorilla M1085 31.78lb 85ft/s 1,287ft/s 15.5G 17,837ft 30.7s 24s
OK KBA M3500 32.03lb 105ft/s 1,772ft/s 32.2G 18,016ft 29.2s 27s
OK AeroTech M1850 30.98lb 87ft/s 1,436ft/s 16.6G 18,190ft 30.3s 24s
OK Cesaroni M2045 29.60lb 92ft/s 1,696ft/s 19.4G 18,552ft 29.7s 26s
OK Cesaroni M2150 30.16lb 90ft/s 1,729ft/s 19.9G 18,757ft 29.9s 26s
OK Cesaroni M840 31.55lb 74ft/s 1,294ft/s 13.0G 19,123ft 32.6s 24s
OK Cesaroni M1590 29.62lb 88ft/s 1,621ft/s 16.7G 19,197ft 30.5s 26s
OK AeroTech M685 31.67lb 67ft/s 1,184ft/s 8.9G 19,270ft 33.5s 22s
OK Gorilla M2925 31.78lb 106ft/s 1,772ft/s 33.6G 19,307ft 29.9s 27s
OK KBA M1450 33.01lb 81ft/s 1,525ft/s 14.5G 19,515ft 31.5s 26s
OK Cesaroni M1545 33.59lb 75ft/s 1,618ft/s 12.1G 19,770ft 31.6s 26s
OK AMW M1630 32.17lb 109ft/s 1,584ft/s 22.7G 19,902ft 31.1s 26s
OK Cesaroni M2020 31.72lb 96ft/s 1,767ft/s 18.4G 20,262ft 30.8s 27s
OK Loki M3000 32.01lb 119ft/s 1,886ft/s 30.6G 20,708ft 30.5s 27s
OK Loki M3464 32.97lb 118ft/s 2,034ft/s 31.1G 21,606ft 31.0s 28s
OK Cesaroni M2245 34.26lb 92ft/s 1,970ft/s 20.2G 22,689ft 32.1s 28s

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 Contrail K300 speed at end of launch guide too slow (42ft/s)
failedG Hypertek L200 speed at end of launch guide too slow (31ft/s)
failedG Gorilla L695 speed at end of launch guide too slow (43ft/s)
failedG Hypertek L225 speed at end of launch guide too slow (35ft/s)
failedG Hypertek L350 speed at end of launch guide too slow (47ft/s)
failedG Loki L480 speed at end of launch guide too slow (40ft/s)
failedG Contrail L369 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni L395 speed at end of launch guide too slow (42ft/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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