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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 132 motors that fit and appear to have enough thrust (667 motors didn't fit, 12 motors failed safety checks). 141 motor had thrust curves available and 249 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:   Starblazer X-20 x4 54mm MMT
Owner: Michael Erwin
Body Diameter: 4.00in
Dry Weight: 2,523g
MMT Diameter: 54.0mm
MMT Length: 584.0mm
CD: 0.60

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 AeroTech I215 3,050g 57ft/s 355ft/s 7.7G 1,614ft 10.1s 8s
OK AeroTech I599 3,035g 102ft/s 419ft/s 24.8G 1,708ft 9.7s 9s
OK AeroTech I229 3,037g 56ft/s 378ft/s 8.2G 1,721ft 10.3s 9s
OK Cesaroni I445 3,098g 73ft/s 462ft/s 16.5G 2,042ft 10.6s 10s
OK Cesaroni I218 3,103g 55ft/s 420ft/s 7.7G 2,105ft 11.3s 9s
OK Cesaroni I100 3,330g 51ft/s 333ft/s 8.3G 2,657ft 13.8s 5s
OK Cesaroni J250 3,353g 48ft/s 537ft/s 7.4G 2,906ft 13.0s 10s
OK AeroTech J250 3,430g 52ft/s 544ft/s 8.1G 2,990ft 13.1s 10s
OK Cesaroni J280 3,477g 55ft/s 567ft/s 8.4G 3,009ft 13.1s 11s
OK Cesaroni J145 3,360g 54ft/s 429ft/s 13.7G 3,025ft 13.7s 9s
OK AeroTech J250 3,231g 63ft/s 541ft/s 9.6G 3,094ft 13.1s 10s
OK Cesaroni J1055 3,295g 118ft/s 716ft/s 34.4G 3,128ft 12.2s 12s
OK AeroTech J315 3,374g 62ft/s 591ft/s 10.4G 3,221ft 13.2s 11s
OK AeroTech J180 3,332g 61ft/s 519ft/s 9.0G 3,456ft 13.9s 9s
OK Cesaroni J240 3,398g 53ft/s 590ft/s 7.7G 3,467ft 13.9s 11s
OK Gorilla J365 3,727g 51ft/s 649ft/s 12.6G 3,471ft 13.7s 11s
OK Cesaroni J430 3,323g 73ft/s 692ft/s 15.0G 3,494ft 13.3s 11s
OK AeroTech J1299 3,357g 126ft/s 811ft/s 44.1G 3,514ft 12.7s 12s
OK AeroTech J275 3,387g 57ft/s 591ft/s 9.0G 3,560ft 13.9s 10s
OK Cesaroni J293 3,363g 58ft/s 636ft/s 9.8G 3,565ft 13.8s 11s
OK AeroTech J460 3,312g 78ft/s 704ft/s 16.0G 3,569ft 13.2s 11s
OK Cesaroni J244 3,434g 50ft/s 609ft/s 6.8G 3,633ft 14.3s 11s
OK Cesaroni J210 3,365g 56ft/s 543ft/s 9.0G 3,646ft 14.6s 11s
OK AMW J1365 3,642g 123ft/s 825ft/s 43.1G 3,712ft 13.0s 12s
OK AMW J400 3,905g 59ft/s 700ft/s 11.4G 3,839ft 14.1s 12s
OK Loki J350 3,783g 59ft/s 700ft/s 11.2G 3,889ft 14.2s 12s
OK Gorilla J167 3,739g 57ft/s 504ft/s 9.1G 3,979ft 15.4s 9s
OK AMW J475 3,933g 67ft/s 753ft/s 15.1G 4,012ft 14.1s 12s
OK AeroTech J1799 3,634g 142ft/s 969ft/s 59.7G 4,108ft 13.3s 13s
OK Cesaroni J360 3,627g 58ft/s 739ft/s 14.2G 4,120ft 14.5s 12s
OK Gorilla J465 3,705g 67ft/s 785ft/s 16.9G 4,143ft 14.2s 12s
OK Cesaroni J380 3,816g 61ft/s 757ft/s 10.3G 4,149ft 14.5s 12s
OK Cesaroni J1520 3,549g 129ft/s 980ft/s 47.9G 4,160ft 13.4s 13s
OK Gorilla J395 3,683g 62ft/s 759ft/s 11.7G 4,180ft 14.5s 12s
OK AeroTech J450 3,746g 66ft/s 782ft/s 13.7G 4,230ft 14.5s 12s
OK Gorilla J485 3,713g 67ft/s 813ft/s 14.9G 4,279ft 14.4s 12s
OK AMW J395 3,791g 68ft/s 750ft/s 11.7G 4,302ft 14.7s 12s
OK Gorilla J450 3,978g 62ft/s 781ft/s 14.5G 4,326ft 14.8s 12s
OK Gorilla J535 3,748g 82ft/s 841ft/s 17.5G 4,336ft 14.2s 12s
OK AMW J440 3,752g 91ft/s 804ft/s 20.9G 4,354ft 14.2s 12s
OK Loki J820 3,733g 103ft/s 900ft/s 27.4G 4,356ft 13.9s 12s
OK Loki J525 3,763g 80ft/s 852ft/s 16.6G 4,370ft 14.3s 12s
OK AMW J325 3,753g 73ft/s 693ft/s 13.7G 4,390ft 14.9s 12s
OK AMW K1720 3,874g 139ft/s 997ft/s 51.8G 4,419ft 13.8s 13s
OK AeroTech J540 3,607g 82ft/s 866ft/s 18.1G 4,473ft 14.2s 12s
OK AeroTech J401 3,435g 70ft/s 826ft/s 13.2G 4,507ft 14.6s 12s
OK AMW J745 3,743g 98ft/s 931ft/s 22.9G 4,601ft 14.4s 13s
OK AMW J475 4,016g 73ft/s 817ft/s 13.9G 4,686ft 15.1s 12s
OK Cesaroni J355 3,698g 66ft/s 786ft/s 11.0G 4,712ft 15.2s 12s
OK Loki J175 3,773g 62ft/s 600ft/s 10.4G 4,772ft 16.3s 10s
OK AeroTech J800 3,609g 101ft/s 973ft/s 25.9G 4,774ft 14.4s 12s
OK Cesaroni J760 3,600g 95ft/s 1,010ft/s 24.5G 4,825ft 14.4s 13s
OK Loki J300 3,838g 62ft/s 728ft/s 9.7G 4,826ft 15.8s 12s
OK Cesaroni J295 3,642g 67ft/s 733ft/s 11.3G 4,839ft 15.5s 11s
OK AMW K665 4,260g 79ft/s 927ft/s 19.0G 4,872ft 14.9s 13s
OK AeroTech J415 3,691g 69ft/s 850ft/s 13.9G 4,904ft 15.1s 12s
OK AeroTech K456 4,007g 68ft/s 867ft/s 12.2G 4,918ft 15.3s 12s
OK Cesaroni J449 3,645g 71ft/s 898ft/s 14.7G 4,919ft 15.1s 12s
OK AeroTech K2050 3,815g 142ft/s 1,184ft/s 57.7G 4,961ft 14.2s 13s
OK Cesaroni K2045 3,813g 150ft/s 1,220ft/s 60.2G 4,986ft 14.1s 13s
OK Cesaroni K360 3,755g 63ft/s 842ft/s 9.7G 5,027ft 15.6s 12s
OK Gorilla K222 4,120g 59ft/s 617ft/s 9.5G 5,132ft 16.9s 10s
OK AeroTech K400 3,717g 75ft/s 849ft/s 13.8G 5,133ft 15.6s 12s
OK Gorilla K555 4,100g 70ft/s 945ft/s 15.2G 5,133ft 15.4s 13s
OK Gorilla K520 3,965g 72ft/s 932ft/s 14.3G 5,138ft 15.5s 13s
OK Cesaroni K454 3,914g 67ft/s 895ft/s 13.3G 5,149ft 15.5s 12s
OK Gorilla K630 4,083g 77ft/s 971ft/s 19.0G 5,154ft 15.2s 13s
OK Cesaroni K530 4,163g 71ft/s 951ft/s 13.3G 5,157ft 15.4s 13s
OK Gorilla K533 4,240g 66ft/s 922ft/s 16.2G 5,187ft 15.5s 13s
OK KBA K700 4,026g 89ft/s 1,036ft/s 21.6G 5,201ft 15.1s 13s
OK AMW K475 4,016g 70ft/s 915ft/s 12.8G 5,203ft 15.6s 13s
OK AeroTech K513 4,170g 76ft/s 959ft/s 14.9G 5,290ft 15.4s 13s
OK AeroTech K695 4,010g 87ft/s 1,032ft/s 22.5G 5,297ft 15.1s 13s
OK AMW K535 4,082g 76ft/s 933ft/s 14.9G 5,298ft 15.6s 13s
OK AeroTech K535 3,787g 81ft/s 949ft/s 16.2G 5,315ft 15.3s 12s
OK AMW K610 4,288g 79ft/s 968ft/s 16.7G 5,456ft 15.7s 13s
OK AeroTech K185 3,957g 52ft/s 664ft/s 7.6G 5,484ft 17.3s 10s
OK AMW K455 4,027g 84ft/s 886ft/s 18.6G 5,489ft 15.8s 13s
OK AeroTech K1100 3,859g 117ft/s 1,170ft/s 34.5G 5,502ft 14.9s 13s
OK AMW K935 4,031g 105ft/s 1,124ft/s 26.6G 5,517ft 15.2s 14s
OK AMW K700 4,611g 78ft/s 1,033ft/s 17.6G 5,608ft 15.8s 13s
OK Loki K690 4,923g 74ft/s 1,032ft/s 16.6G 5,629ft 15.9s 14s
OK Cesaroni K940 3,890g 105ft/s 1,198ft/s 28.0G 5,670ft 15.1s 13s
OK AeroTech K540 3,798g 93ft/s 1,018ft/s 22.0G 5,676ft 15.4s 12s
OK AeroTech K550 4,010g 83ft/s 982ft/s 19.4G 5,722ft 15.7s 12s
OK AMW K855 4,644g 88ft/s 1,102ft/s 21.9G 5,727ft 15.7s 14s
OK Cesaroni K500 3,999g 72ft/s 990ft/s 14.4G 5,750ft 16.0s 13s
OK Cesaroni K515 4,177g 73ft/s 994ft/s 15.5G 5,864ft 16.1s 13s
OK Cesaroni K630 3,933g 84ft/s 1,106ft/s 19.5G 5,865ft 15.6s 13s
OK Gorilla K700 4,239g 77ft/s 1,098ft/s 18.4G 5,867ft 16.0s 14s
OK Gorilla K763 4,315g 80ft/s 1,133ft/s 20.0G 5,892ft 15.9s 14s
OK Cesaroni K400 4,074g 68ft/s 917ft/s 11.0G 5,893ft 16.6s 13s
OK Cesaroni K650 4,513g 78ft/s 1,100ft/s 15.3G 5,898ft 16.0s 13s
OK Gorilla K805 4,298g 88ft/s 1,145ft/s 25.2G 5,951ft 15.7s 14s
OK AeroTech K805 4,066g 90ft/s 1,158ft/s 21.5G 5,973ft 15.7s 13s
OK Cesaroni K445 3,921g 80ft/s 952ft/s 16.3G 5,974ft 16.2s 12s
OK Gorilla K327 4,340g 71ft/s 783ft/s 15.2G 5,978ft 16.9s 11s
OK AeroTech K1103 3,982g 127ft/s 1,286ft/s 40.3G 5,985ft 15.2s 14s
OK Cesaroni K520 4,099g 77ft/s 1,033ft/s 14.3G 6,057ft 16.3s 13s
OK AMW K710 4,335g 91ft/s 1,078ft/s 19.8G 6,090ft 16.1s 13s
OK AMW K670 4,408g 86ft/s 1,093ft/s 18.3G 6,130ft 16.2s 14s
OK AMW K1250 4,338g 121ft/s 1,303ft/s 37.0G 6,251ft 15.7s 14s
OK Cesaroni K740 3,992g 95ft/s 1,204ft/s 21.4G 6,276ft 15.9s 13s
OK Loki K960 4,269g 119ft/s 1,259ft/s 35.8G 6,309ft 15.8s 14s
OK AMW K580 4,346g 92ft/s 1,040ft/s 24.3G 6,329ft 16.4s 13s
OK Cesaroni K1200 4,155g 112ft/s 1,387ft/s 32.7G 6,373ft 15.6s 14s
OK Loki K250 4,314g 74ft/s 737ft/s 17.9G 6,432ft 18.3s 11s
OK AeroTech K1275 4,509g 116ft/s 1,339ft/s 34.7G 6,498ft 15.8s 14s
OK Cesaroni K635 4,291g 83ft/s 1,151ft/s 17.4G 6,543ft 16.4s 13s
OK Cesaroni K650 4,233g 88ft/s 1,165ft/s 28.7G 6,546ft 16.3s 13s
OK AeroTech K828 4,746g 100ft/s 1,237ft/s 27.2G 6,551ft 16.2s 14s
OK Cesaroni K675 4,463g 83ft/s 1,144ft/s 19.7G 6,551ft 16.5s 13s
OK Cesaroni K780 4,223g 99ft/s 1,289ft/s 23.1G 6,705ft 16.1s 13s
OK Loki K527 4,496g 82ft/s 1,068ft/s 16.3G 6,726ft 17.1s 13s
OK Cesaroni K490 4,377g 73ft/s 1,053ft/s 12.7G 6,777ft 17.2s 13s
OK Cesaroni K570 4,208g 92ft/s 1,119ft/s 20.8G 6,875ft 16.7s 13s
OK Cesaroni K600 4,415g 84ft/s 1,153ft/s 17.0G 6,916ft 16.9s 13s
OK Cesaroni K1440 4,416g 125ft/s 1,518ft/s 42.8G 6,928ft 15.9s 14s
OK AeroTech K700 4,558g 95ft/s 1,197ft/s 22.9G 7,050ft 16.6s 13s
OK Cesaroni K750 4,580g 89ft/s 1,260ft/s 20.5G 7,098ft 16.7s 14s
OK Cesaroni K820 4,505g 99ft/s 1,313ft/s 36.5G 7,262ft 16.7s 14s
OK Cesaroni K711 4,721g 94ft/s 1,221ft/s 31.7G 7,282ft 17.0s 14s
OK AeroTech K480 4,601g 87ft/s 1,119ft/s 19.2G 7,327ft 17.3s 13s
OK Cesaroni K261 4,455g 54ft/s 824ft/s 7.2G 7,377ft 19.3s 10s
OK AeroTech K270 4,623g 58ft/s 801ft/s 8.4G 7,443ft 19.5s 11s
OK AeroTech K375 4,629g 108ft/s 961ft/s 28.5G 7,520ft 18.0s 12s
OK Cesaroni K660 4,472g 97ft/s 1,246ft/s 23.7G 7,534ft 17.1s 13s
OK Cesaroni K590 4,517g 120ft/s 1,106ft/s 40.0G 7,708ft 17.4s 13s
OK Cesaroni K260 4,570g 60ft/s 862ft/s 8.6G 8,110ft 19.9s 11s
warningsD AMW K590 4,240g 14:1 thrust/weight ratio (no data)
warningsD Gorilla K695 4,020g 18:1 thrust/weight ratio (no data)
warningsD Gorilla K828 4,359g 19:1 thrust/weight ratio (no data)

D No simulation data found for this motor.

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 I117 speed at end of launch guide too slow (35ft/s)
failedG Cesaroni I140 speed at end of launch guide too slow (40ft/s)
failedG AeroTech I115 speed at end of launch guide too slow (36ft/s)
failedG AeroTech I170 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni I150 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni I120 speed at end of launch guide too slow (39ft/s)
failedG Cesaroni I165 speed at end of launch guide too slow (46ft/s)
failedG AeroTech I65 speed at end of launch guide too slow (45ft/s)
failedG AeroTech J90 speed at end of launch guide too slow (38ft/s)
failedG AeroTech J135 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni J140 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni K160 speed at end of launch guide too slow (47ft/s)

G These simulations were run with a launch guide length of 7ft (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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