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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 115 motors that fit and appear to have enough thrust (668 motors didn't fit, 8 motors failed safety checks). 123 motor had thrust curves available and 236 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: 0.52

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 349ft/s 11.8G 2,071ft 11.8s 10s
OK Contrail K630 24.05lb 53ft/s 360ft/s 7.4G 2,181ft 12.3s 10s
OK Contrail K456 24.39lb 59ft/s 372ft/s 7.3G 2,644ft 13.6s 10s
OK AeroTech K1499 20.06lb 94ft/s 458ft/s 18.5G 2,751ft 13.0s 12s
OK Contrail K678 25.15lb 67ft/s 443ft/s 9.4G 3,228ft 14.6s 12s
OK Contrail K777 25.15lb 79ft/s 448ft/s 15.0G 3,272ft 14.6s 12s
OK Contrail K543 24.17lb 60ft/s 510ft/s 7.4G 4,164ft 16.7s 13s
OK Cesaroni K735 21.75lb 53ft/s 577ft/s 8.5G 4,442ft 16.9s 14s
OK Contrail K404 25.37lb 50ft/s 500ft/s 4.9G 4,717ft 18.5s 12s
OK Contrail K888 25.42lb 75ft/s 599ft/s 11.1G 5,051ft 17.7s 15s
OK AeroTech K780 22.69lb 60ft/s 664ft/s 8.7G 5,520ft 18.6s 16s
OK Cesaroni K555 22.30lb 48ft/s 644ft/s 5.6G 5,700ft 19.6s 15s
OK Cesaroni K2000 21.65lb 98ft/s 764ft/s 25.7G 5,834ft 18.0s 17s
OK AeroTech K560 22.27lb 53ft/s 633ft/s 7.1G 5,883ft 19.5s 15s
OK Cesaroni K1085 21.58lb 71ft/s 739ft/s 11.6G 5,971ft 18.7s 16s
OK Hypertek L355 24.94lb 49ft/s 526ft/s 5.0G 5,972ft 21.4s 12s
OK Cesaroni K661 21.79lb 54ft/s 684ft/s 7.0G 5,973ft 19.5s 16s
OK Cesaroni K510 21.93lb 54ft/s 635ft/s 6.0G 5,978ft 19.9s 15s
OK Hypertek L475 24.81lb 50ft/s 607ft/s 5.1G 6,097ft 20.6s 14s
OK AeroTech K1000 21.96lb 73ft/s 747ft/s 11.0G 6,222ft 19.1s 17s
OK Cesaroni L585 22.36lb 53ft/s 703ft/s 5.8G 6,532ft 20.6s 16s
OK Hypertek L535 24.92lb 57ft/s 663ft/s 6.8G 6,719ft 21.0s 15s
OK Hypertek L610 24.93lb 58ft/s 692ft/s 7.3G 6,964ft 21.1s 15s
OK Hypertek L550 24.81lb 57ft/s 668ft/s 6.6G 6,968ft 21.4s 15s
OK Cesaroni L820 23.76lb 54ft/s 795ft/s 8.4G 7,149ft 20.9s 17s
OK Loki L780 23.94lb 49ft/s 807ft/s 8.2G 7,354ft 21.2s 17s
OK Cesaroni L910 21.99lb 67ft/s 831ft/s 9.9G 7,379ft 20.7s 17s
OK Gorilla L789 23.67lb 55ft/s 867ft/s 7.9G 8,217ft 22.2s 18s
OK Gorilla L425 23.94lb 54ft/s 695ft/s 6.1G 8,271ft 23.5s 16s
OK Cesaroni L3200 23.42lb 122ft/s 1,031ft/s 36.7G 8,351ft 20.7s 20s
OK Cesaroni L645 24.49lb 52ft/s 828ft/s 6.2G 8,419ft 23.0s 18s
OK AeroTech L1150 24.32lb 73ft/s 945ft/s 11.6G 8,636ft 22.0s 19s
OK Loki L930 24.02lb 66ft/s 928ft/s 9.7G 8,856ft 22.6s 19s
OK Gorilla L985 24.23lb 56ft/s 965ft/s 9.9G 8,905ft 22.7s 19s
OK AeroTech L875 26.31lb 59ft/s 911ft/s 8.2G 8,931ft 23.0s 18s
OK Gorilla L1150 23.94lb 69ft/s 966ft/s 16.1G 8,943ft 22.2s 19s
OK Cesaroni L995 24.14lb 72ft/s 946ft/s 11.3G 9,045ft 22.5s 19s
OK AeroTech L1040 26.62lb 62ft/s 941ft/s 10.2G 9,096ft 22.8s 19s
OK AeroTech L850 24.47lb 67ft/s 916ft/s 10.2G 9,098ft 22.7s 18s
OK AeroTech L900 26.63lb 58ft/s 919ft/s 8.3G 9,106ft 23.2s 19s
OK Cesaroni L851 24.57lb 59ft/s 941ft/s 8.3G 9,173ft 23.1s 19s
OK Gorilla L1112 24.22lb 75ft/s 985ft/s 11.2G 9,210ft 22.6s 19s
OK Cesaroni L1355 27.16lb 77ft/s 1,007ft/s 14.6G 9,408ft 22.6s 19s
OK Cesaroni L800 23.96lb 67ft/s 925ft/s 10.2G 9,431ft 23.3s 19s
OK AeroTech L1520 24.27lb 84ft/s 1,054ft/s 15.3G 9,431ft 22.4s 20s
OK Cesaroni L1720 23.59lb 87ft/s 1,095ft/s 18.2G 9,450ft 22.2s 20s
OK Cesaroni L1050 23.82lb 69ft/s 997ft/s 10.7G 9,451ft 22.9s 19s
OK Loki L840 24.48lb 65ft/s 954ft/s 10.1G 9,666ft 23.3s 19s
OK AeroTech L1390 24.77lb 77ft/s 1,064ft/s 14.5G 9,805ft 22.9s 20s
OK Loki L1482 24.02lb 76ft/s 1,108ft/s 15.3G 9,805ft 22.7s 20s
OK AeroTech L1170 27.22lb 74ft/s 1,028ft/s 11.5G 9,893ft 23.3s 20s
OK AeroTech L1250 28.67lb 70ft/s 1,003ft/s 11.1G 9,982ft 23.7s 20s
OK Gorilla L1065 28.04lb 72ft/s 1,009ft/s 13.7G 10,307ft 23.6s 20s
OK Cesaroni L1350 24.09lb 78ft/s 1,163ft/s 13.8G 10,836ft 23.7s 20s
OK AMW L1290 28.12lb 66ft/s 1,109ft/s 11.4G 10,966ft 24.5s 21s
OK AeroTech L1420 26.28lb 78ft/s 1,189ft/s 14.0G 11,188ft 24.1s 21s
OK AeroTech L1365 27.04lb 76ft/s 1,169ft/s 12.9G 11,363ft 24.5s 21s
OK Cesaroni L1685 29.56lb 92ft/s 1,183ft/s 16.7G 11,382ft 24.2s 21s
OK Cesaroni L1410 27.50lb 71ft/s 1,193ft/s 13.1G 11,457ft 24.6s 21s
OK Cesaroni L1395 25.75lb 82ft/s 1,258ft/s 14.8G 11,984ft 24.7s 21s
OK Cesaroni L2375 25.39lb 103ft/s 1,377ft/s 23.4G 11,992ft 24.1s 22s
OK AeroTech L2200 26.76lb 105ft/s 1,310ft/s 26.3G 12,023ft 24.2s 22s
OK Cesaroni L1115 25.93lb 79ft/s 1,173ft/s 13.3G 12,112ft 25.2s 21s
OK Loki M1200 28.05lb 62ft/s 1,190ft/s 11.7G 12,118ft 25.4s 21s
OK AeroTech M1350 26.82lb 80ft/s 1,228ft/s 14.1G 12,289ft 25.0s 21s
OK Gorilla M745 28.61lb 69ft/s 997ft/s 11.4G 12,380ft 26.4s 19s
OK Gorilla M1355 28.35lb 74ft/s 1,220ft/s 14.6G 12,400ft 25.4s 22s
OK Cesaroni M1101 27.11lb 71ft/s 1,201ft/s 10.9G 12,436ft 25.6s 21s
OK AeroTech M1500 27.01lb 82ft/s 1,279ft/s 13.7G 12,455ft 25.2s 22s
OK AeroTech M1550 28.66lb 85ft/s 1,291ft/s 15.7G 12,721ft 25.4s 22s
OK Loki M900 28.41lb 55ft/s 1,162ft/s 7.7G 12,905ft 26.9s 21s
OK AeroTech M1297 26.44lb 88ft/s 1,276ft/s 16.0G 12,945ft 25.5s 21s
OK AeroTech M1780 26.61lb 99ft/s 1,358ft/s 19.4G 12,964ft 25.1s 22s
OK Cesaroni M2250 25.95lb 105ft/s 1,442ft/s 23.1G 13,007ft 24.8s 22s
OK Cesaroni M1230 26.90lb 71ft/s 1,277ft/s 12.1G 13,096ft 25.9s 21s
OK Gorilla M1610 31.47lb 75ft/s 1,276ft/s 15.9G 13,110ft 26.0s 22s
OK Gorilla M1665 28.61lb 85ft/s 1,321ft/s 17.6G 13,238ft 25.6s 22s
OK Cesaroni M1830 26.19lb 92ft/s 1,419ft/s 18.2G 13,332ft 25.4s 22s
OK Cesaroni M1770 29.43lb 82ft/s 1,396ft/s 15.2G 13,454ft 25.9s 22s
OK Cesaroni M2075 32.07lb 95ft/s 1,362ft/s 19.9G 13,574ft 25.9s 23s
OK Cesaroni M1160 28.78lb 64ft/s 1,289ft/s 10.2G 13,663ft 26.8s 22s
OK Gorilla M1952 28.22lb 104ft/s 1,418ft/s 20.7G 13,730ft 25.7s 22s
OK Cesaroni M1810 28.16lb 85ft/s 1,473ft/s 16.5G 14,079ft 26.1s 23s
OK Cesaroni M3100 27.28lb 115ft/s 1,625ft/s 31.3G 14,079ft 25.3s 23s
OK Cesaroni M1670 27.75lb 85ft/s 1,380ft/s 16.9G 14,095ft 26.5s 23s
OK Loki M1882 28.42lb 93ft/s 1,487ft/s 20.5G 14,257ft 26.0s 23s
OK Cesaroni M1401 28.95lb 74ft/s 1,383ft/s 12.0G 14,294ft 26.8s 22s
OK Cesaroni M1675 27.73lb 87ft/s 1,460ft/s 16.5G 14,299ft 26.2s 22s
OK AeroTech M650 27.52lb 70ft/s 1,047ft/s 9.9G 14,417ft 28.4s 17s
OK Cesaroni M1400 27.91lb 88ft/s 1,376ft/s 16.8G 14,452ft 26.7s 22s
OK Cesaroni M2080 31.74lb 91ft/s 1,477ft/s 18.1G 14,626ft 26.6s 23s
OK AMW M2050 31.94lb 86ft/s 1,452ft/s 18.0G 14,627ft 26.7s 23s
OK Cesaroni M1300 28.69lb 102ft/s 1,330ft/s 21.5G 14,680ft 26.8s 22s
OK Loki M1650 28.63lb 109ft/s 1,400ft/s 28.4G 14,696ft 26.5s 22s
OK Loki M2550 28.41lb 107ft/s 1,615ft/s 24.2G 14,815ft 26.0s 23s
OK AeroTech M1315 28.66lb 78ft/s 1,369ft/s 13.1G 15,038ft 27.3s 21s
OK Cesaroni M3700 28.96lb 120ft/s 1,711ft/s 33.0G 15,111ft 26.1s 24s
OK Cesaroni M1540 29.24lb 90ft/s 1,475ft/s 17.5G 15,243ft 27.0s 23s
OK Loki M1969 32.07lb 86ft/s 1,523ft/s 17.2G 15,473ft 27.3s 23s
OK KBA M3500 32.03lb 105ft/s 1,742ft/s 31.5G 15,529ft 26.7s 24s
OK Gorilla M1085 31.78lb 85ft/s 1,233ft/s 15.4G 15,697ft 28.4s 21s
OK AeroTech M1850 30.98lb 87ft/s 1,385ft/s 16.6G 15,889ft 27.9s 21s
OK Cesaroni M2045 29.60lb 92ft/s 1,645ft/s 19.2G 16,018ft 27.2s 24s
OK Cesaroni M2150 30.16lb 90ft/s 1,677ft/s 19.7G 16,179ft 27.3s 24s
OK Cesaroni M1590 29.62lb 88ft/s 1,560ft/s 16.7G 16,615ft 27.9s 23s
OK Gorilla M2925 31.78lb 106ft/s 1,730ft/s 33.0G 16,632ft 27.3s 25s
OK Cesaroni M840 31.55lb 74ft/s 1,226ft/s 13.0G 16,816ft 30.2s 21s
OK KBA M1450 33.01lb 81ft/s 1,490ft/s 14.5G 16,828ft 28.6s 23s
OK AeroTech M685 31.67lb 67ft/s 1,119ft/s 8.9G 17,048ft 31.1s 19s
OK Cesaroni M1545 33.59lb 75ft/s 1,555ft/s 11.9G 17,179ft 29.0s 24s
OK AMW M1630 32.17lb 109ft/s 1,522ft/s 22.7G 17,284ft 28.5s 24s
OK Cesaroni M2020 31.72lb 96ft/s 1,709ft/s 18.2G 17,464ft 28.1s 24s
OK Loki M3000 32.01lb 119ft/s 1,834ft/s 30.6G 17,761ft 27.7s 24s
OK Loki M3464 32.97lb 118ft/s 1,983ft/s 31.1G 18,486ft 28.2s 25s
OK Cesaroni M2245 34.26lb 92ft/s 1,900ft/s 19.9G 19,467ft 29.3s 25s

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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