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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 61 motors that fit and appear to have enough thrust (748 motors didn't fit, 2 motors failed safety checks). 63 motor had thrust curves available and 115 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:   Liberty 4
Owner: John O'Connor
Body Diameter: 3.90in
Dry Weight: 5.20lb
MMT Diameter: 54.0mm
MMT Length: 13.00in
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 Cesaroni I140 6.44lb 51ft/s 331ft/s 4.6G 1,672ft 10.8s 8s
OK AeroTech I215 6.36lb 71ft/s 378ft/s 8.2G 1,740ft 10.4s 9s
OK AeroTech I170 6.36lb 61ft/s 365ft/s 6.4G 1,773ft 10.7s 8s
OK AeroTech I599 6.33lb 129ft/s 444ft/s 26.3G 1,827ft 9.9s 9s
OK AeroTech I229 6.33lb 70ft/s 401ft/s 8.8G 1,850ft 10.6s 9s
OK Cesaroni I150 6.46lb 55ft/s 381ft/s 5.1G 2,084ft 11.8s 9s
OK Cesaroni I445 6.47lb 98ft/s 489ft/s 17.5G 2,175ft 10.9s 10s
OK Cesaroni I120 6.57lb 50ft/s 366ft/s 4.0G 2,243ft 12.6s 8s
OK Cesaroni I218 6.48lb 69ft/s 445ft/s 8.2G 2,248ft 11.6s 9s
OK Cesaroni I165 6.51lb 58ft/s 419ft/s 5.5G 2,362ft 12.3s 9s
OK Cesaroni I100 6.98lb 65ft/s 352ft/s 8.8G 2,841ft 14.1s 5s
OK AeroTech I65 6.86lb 56ft/s 364ft/s 5.4G 3,041ft 14.9s 6s
OK Cesaroni J250 7.03lb 62ft/s 566ft/s 7.8G 3,067ft 13.2s 10s
OK AeroTech J250 7.20lb 66ft/s 572ft/s 8.5G 3,151ft 13.3s 11s
OK AeroTech J90 7.08lb 49ft/s 415ft/s 4.7G 3,163ft 14.7s 7s
OK Cesaroni J280 7.30lb 69ft/s 597ft/s 8.8G 3,169ft 13.3s 11s
OK Cesaroni J145 7.05lb 68ft/s 452ft/s 14.5G 3,202ft 13.9s 9s
OK AeroTech J250 6.76lb 79ft/s 569ft/s 10.2G 3,257ft 13.2s 10s
OK Cesaroni J1055 6.90lb 149ft/s 755ft/s 36.3G 3,273ft 12.4s 12s
OK AeroTech J315 7.08lb 80ft/s 621ft/s 11.0G 3,382ft 13.4s 11s
OK AeroTech J180 6.98lb 76ft/s 545ft/s 9.5G 3,632ft 14.1s 9s
OK Gorilla J365 7.85lb 66ft/s 680ft/s 13.3G 3,637ft 13.9s 12s
OK Cesaroni J240 7.13lb 68ft/s 619ft/s 8.2G 3,640ft 14.1s 11s
OK Cesaroni J430 6.96lb 96ft/s 727ft/s 15.9G 3,655ft 13.4s 11s
OK AeroTech J1299 7.04lb 162ft/s 854ft/s 46.5G 3,662ft 12.8s 12s
OK AeroTech J460 6.94lb 102ft/s 739ft/s 16.9G 3,727ft 13.4s 11s
OK AeroTech J275 7.11lb 72ft/s 620ft/s 9.5G 3,732ft 14.1s 10s
OK Cesaroni J293 7.05lb 73ft/s 668ft/s 10.3G 3,737ft 14.0s 11s
OK Cesaroni J244 7.21lb 64ft/s 639ft/s 7.2G 3,812ft 14.5s 11s
OK Cesaroni J210 7.06lb 70ft/s 569ft/s 9.5G 3,840ft 14.8s 11s
OK AMW J1365 7.67lb 157ft/s 866ft/s 45.3G 3,867ft 13.2s 13s
OK AMW J400 8.25lb 77ft/s 732ft/s 11.9G 4,006ft 14.3s 12s
OK Loki J350 7.98lb 75ft/s 732ft/s 11.8G 4,060ft 14.4s 12s
OK Gorilla J167 7.88lb 72ft/s 527ft/s 9.6G 4,176ft 15.6s 10s
OK AMW J475 8.31lb 86ft/s 787ft/s 15.8G 4,178ft 14.3s 12s
OK AeroTech J1799 7.65lb 184ft/s 1,017ft/s 62.7G 4,256ft 13.4s 13s
OK Cesaroni J360 7.63lb 76ft/s 774ft/s 14.9G 4,293ft 14.6s 12s
OK Cesaroni J1520 7.46lb 168ft/s 1,030ft/s 50.3G 4,311ft 13.5s 13s
OK Gorilla J465 7.81lb 85ft/s 821ft/s 17.8G 4,313ft 14.4s 12s
OK Cesaroni J380 8.05lb 76ft/s 792ft/s 10.8G 4,320ft 14.7s 12s
OK Gorilla J395 7.76lb 79ft/s 794ft/s 12.3G 4,358ft 14.7s 12s
OK Gorilla J485 7.82lb 87ft/s 851ft/s 15.6G 4,452ft 14.5s 12s
OK AMW J395 8.00lb 87ft/s 784ft/s 12.3G 4,482ft 14.9s 12s
OK Gorilla J535 7.90lb 108ft/s 880ft/s 18.3G 4,503ft 14.4s 12s
OK Loki J820 7.87lb 134ft/s 941ft/s 28.8G 4,514ft 14.0s 13s
OK AMW J440 7.91lb 116ft/s 840ft/s 21.9G 4,525ft 14.4s 12s
OK Loki J525 7.93lb 99ft/s 891ft/s 17.4G 4,539ft 14.5s 13s
OK AMW J325 7.91lb 89ft/s 723ft/s 14.4G 4,575ft 15.1s 12s
OK AeroTech J540 7.59lb 107ft/s 905ft/s 19.1G 4,635ft 14.4s 12s
OK AeroTech J401 7.21lb 91ft/s 864ft/s 14.0G 4,680ft 14.7s 12s
OK AMW J745 7.89lb 118ft/s 973ft/s 24.0G 4,772ft 14.5s 13s
OK Cesaroni J355 7.79lb 84ft/s 820ft/s 11.6G 4,895ft 15.3s 12s
OK AeroTech J800 7.59lb 130ft/s 1,017ft/s 27.1G 4,937ft 14.5s 13s
OK Loki J175 7.96lb 77ft/s 626ft/s 10.9G 4,980ft 16.4s 10s
OK Cesaroni J760 7.57lb 122ft/s 1,056ft/s 25.7G 4,991ft 14.5s 13s
OK Loki J300 8.10lb 80ft/s 759ft/s 10.2G 5,022ft 15.9s 12s
OK Cesaroni J295 7.67lb 85ft/s 764ft/s 11.9G 5,031ft 15.7s 12s
OK AeroTech J415 7.78lb 89ft/s 887ft/s 14.6G 5,082ft 15.2s 12s
OK Cesaroni J449 7.67lb 92ft/s 937ft/s 15.5G 5,098ft 15.2s 12s
OK Cesaroni K360 7.92lb 79ft/s 878ft/s 10.2G 5,215ft 15.7s 12s
OK Cesaroni J140 8.02lb 54ft/s 567ft/s 5.1G 5,322ft 18.2s 9s

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 (46ft/s)
failedG AeroTech I115 speed at end of launch guide too slow (47ft/s)

G These simulations were run with a launch guide length of 10ft (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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