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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 122 motors that fit and appear to have enough thrust (628 motors didn't fit, 41 motors failed safety checks). 160 motor had thrust curves available and 289 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:   Rapiditty
Owner: Wayne Comfort
Body Diameter: 4.00in
Dry Weight: 12.40lb
MMT Diameter: 54.0mm
MMT Length: 26.00in
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 AeroTech I599 13.53lb 76ft/s 199ft/s 11.7G 640ft 6.5s 6s
OK Cesaroni I445 13.67lb 58ft/s 220ft/s 7.8G 820ft 7.6s 6s
OK Hypertek J250 15.25lb 49ft/s 240ft/s 5.0G 1,252ft 9.8s 7s
OK Hypertek J270 15.26lb 56ft/s 280ft/s 6.3G 1,638ft 11.0s 8s
OK AeroTech J315 14.28lb 49ft/s 305ft/s 5.0G 1,692ft 11.2s 9s
OK Cesaroni J1055 14.10lb 90ft/s 363ft/s 17.3G 1,843ft 10.7s 10s
OK Cesaroni J430 14.16lb 58ft/s 361ft/s 7.3G 2,057ft 11.9s 10s
OK AeroTech J460 14.14lb 61ft/s 372ft/s 7.9G 2,185ft 12.1s 10s
OK AeroTech J1299 14.24lb 106ft/s 419ft/s 22.4G 2,314ft 11.9s 11s
OK AMW J400 15.45lb 49ft/s 389ft/s 6.3G 2,428ft 13.1s 11s
OK AMW J1365 14.87lb 102ft/s 442ft/s 22.7G 2,543ft 12.4s 12s
OK AMW J475 15.51lb 56ft/s 426ft/s 8.2G 2,722ft 13.5s 11s
OK Gorilla J395 14.96lb 49ft/s 423ft/s 6.1G 2,767ft 13.9s 11s
OK Gorilla J465 15.01lb 53ft/s 438ft/s 9.2G 2,850ft 13.8s 12s
OK AeroTech J450 15.10lb 53ft/s 440ft/s 7.2G 2,887ft 14.0s 12s
OK AMW J395 15.20lb 53ft/s 429ft/s 6.0G 2,914ft 14.2s 11s
OK AMW J325 15.11lb 56ft/s 409ft/s 7.0G 2,939ft 14.3s 11s
OK Gorilla J485 15.02lb 56ft/s 457ft/s 7.8G 3,015ft 14.2s 12s
OK Gorilla J450 15.61lb 52ft/s 449ft/s 7.9G 3,022ft 14.4s 12s
OK AMW J440 15.11lb 74ft/s 466ft/s 10.9G 3,185ft 14.2s 12s
OK Gorilla J535 15.10lb 66ft/s 475ft/s 9.1G 3,196ft 14.3s 12s
OK Loki J525 15.13lb 63ft/s 481ft/s 9.1G 3,212ft 14.4s 12s
OK AeroTech J1799 14.85lb 123ft/s 519ft/s 31.4G 3,222ft 13.7s 13s
OK Cesaroni J1520 14.66lb 105ft/s 521ft/s 25.5G 3,248ft 13.8s 13s
OK AeroTech J401 14.41lb 55ft/s 468ft/s 6.5G 3,277ft 14.8s 12s
OK Loki J300 15.30lb 48ft/s 438ft/s 4.9G 3,366ft 15.6s 11s
OK Loki J820 15.07lb 85ft/s 509ft/s 14.9G 3,406ft 14.4s 13s
OK Cesaroni J355 14.99lb 51ft/s 464ft/s 5.6G 3,419ft 15.4s 12s
OK Gorilla K222 15.92lb 49ft/s 381ft/s 5.0G 3,425ft 16.4s 10s
OK AeroTech J540 14.79lb 67ft/s 496ft/s 9.3G 3,435ft 14.8s 13s
OK Cesaroni J295 14.87lb 52ft/s 443ft/s 5.6G 3,439ft 15.6s 12s
OK AMW J475 15.69lb 58ft/s 482ft/s 7.4G 3,489ft 15.2s 12s
OK AMW K1720 15.38lb 116ft/s 552ft/s 28.1G 3,567ft 14.4s 14s
OK AMW J745 15.09lb 78ft/s 530ft/s 12.1G 3,618ft 14.9s 13s
OK Cesaroni K360 15.12lb 49ft/s 503ft/s 5.2G 3,826ft 16.3s 13s
OK AeroTech J415 14.98lb 55ft/s 507ft/s 7.4G 3,843ft 15.9s 13s
OK AeroTech K456 15.67lb 54ft/s 519ft/s 6.5G 3,854ft 16.0s 13s
OK Cesaroni J449 14.87lb 57ft/s 525ft/s 7.5G 3,872ft 15.9s 13s
OK AeroTech J800 14.79lb 79ft/s 560ft/s 13.4G 3,979ft 15.5s 14s
OK AeroTech K400 15.03lb 58ft/s 515ft/s 7.1G 3,979ft 16.2s 13s
OK AMW K665 16.23lb 65ft/s 556ft/s 10.9G 4,014ft 15.8s 14s
OK Cesaroni J760 14.77lb 75ft/s 573ft/s 12.7G 4,034ft 15.6s 14s
OK Cesaroni K454 15.47lb 56ft/s 544ft/s 7.0G 4,167ft 16.5s 13s
OK Gorilla K520 15.58lb 58ft/s 559ft/s 8.0G 4,173ft 16.4s 14s
OK Gorilla K555 15.88lb 59ft/s 565ft/s 8.4G 4,212ft 16.4s 14s
OK Gorilla K533 16.18lb 56ft/s 566ft/s 8.9G 4,311ft 16.6s 14s
OK Cesaroni K530 16.02lb 56ft/s 575ft/s 7.8G 4,326ft 16.7s 14s
OK Gorilla K630 15.84lb 66ft/s 584ft/s 10.7G 4,357ft 16.4s 14s
OK AMW K535 15.84lb 63ft/s 573ft/s 8.1G 4,411ft 16.8s 14s
OK KBA K700 15.71lb 70ft/s 614ft/s 12.5G 4,524ft 16.5s 15s
OK AeroTech K513 16.03lb 59ft/s 592ft/s 8.5G 4,561ft 16.9s 14s
OK AeroTech K535 15.19lb 66ft/s 586ft/s 8.5G 4,577ft 16.9s 14s
OK AeroTech K2050 15.25lb 120ft/s 660ft/s 31.3G 4,578ft 16.0s 15s
OK AMW K455 15.72lb 68ft/s 566ft/s 10.1G 4,617ft 17.1s 14s
OK Cesaroni K2045 15.24lb 123ft/s 674ft/s 32.7G 4,681ft 16.2s 15s
OK AMW K610 16.29lb 65ft/s 603ft/s 9.3G 4,704ft 17.1s 14s
OK AeroTech K695 15.68lb 70ft/s 629ft/s 12.2G 4,781ft 16.9s 15s
OK Gorilla K327 16.41lb 59ft/s 528ft/s 8.5G 4,974ft 18.2s 13s
OK Cesaroni K400 15.82lb 54ft/s 597ft/s 5.8G 5,072ft 18.4s 14s
OK Loki K690 17.69lb 63ft/s 653ft/s 9.9G 5,108ft 17.7s 15s
OK Loki K250 16.35lb 54ft/s 502ft/s 10.0G 5,110ft 19.4s 12s
OK AMW K935 15.72lb 84ft/s 677ft/s 14.7G 5,132ft 17.2s 16s
OK AMW K700 17.00lb 66ft/s 653ft/s 10.7G 5,133ft 17.7s 15s
OK Cesaroni K500 15.65lb 59ft/s 632ft/s 7.7G 5,163ft 18.0s 15s
OK AeroTech K550 15.68lb 66ft/s 632ft/s 10.8G 5,243ft 17.9s 15s
OK Cesaroni K515 16.05lb 61ft/s 641ft/s 8.5G 5,317ft 18.2s 15s
OK AeroTech K540 15.21lb 71ft/s 650ft/s 11.7G 5,317ft 17.9s 15s
OK AeroTech K1100 15.35lb 94ft/s 702ft/s 18.6G 5,331ft 17.4s 16s
OK Cesaroni K445 15.48lb 65ft/s 628ft/s 8.7G 5,382ft 18.4s 15s
OK AMW K855 17.08lb 75ft/s 695ft/s 13.2G 5,446ft 17.9s 16s
OK Gorilla K700 16.18lb 69ft/s 686ft/s 10.3G 5,454ft 18.2s 16s
OK Cesaroni K940 15.41lb 83ft/s 721ft/s 15.1G 5,529ft 17.8s 16s
OK Gorilla K763 16.35lb 70ft/s 708ft/s 11.3G 5,617ft 18.3s 16s
OK Cesaroni K650 16.79lb 63ft/s 699ft/s 9.4G 5,624ft 18.5s 16s
OK Cesaroni K520 15.87lb 62ft/s 671ft/s 7.7G 5,635ft 18.7s 15s
OK Cesaroni K630 15.51lb 69ft/s 699ft/s 10.5G 5,656ft 18.4s 16s
OK AMW K710 16.39lb 76ft/s 699ft/s 11.1G 5,798ft 18.5s 16s
OK Gorilla K805 16.31lb 72ft/s 726ft/s 14.5G 5,825ft 18.4s 16s
OK AMW K670 16.56lb 71ft/s 707ft/s 10.3G 5,836ft 18.6s 16s
OK AeroTech K805 15.80lb 75ft/s 729ft/s 11.9G 5,842ft 18.5s 16s
OK AMW K580 16.42lb 76ft/s 696ft/s 13.8G 6,044ft 18.9s 16s
OK AeroTech K990 17.05lb 75ft/s 755ft/s 13.6G 6,054ft 18.7s 17s
OK AeroTech K850 16.90lb 76ft/s 762ft/s 13.9G 6,093ft 18.7s 17s
OK AeroTech K1103 15.62lb 99ft/s 790ft/s 22.2G 6,209ft 18.5s 17s
OK Cesaroni K740 15.64lb 77ft/s 773ft/s 11.7G 6,381ft 19.1s 17s
OK Loki K527 16.75lb 64ft/s 726ft/s 9.2G 6,516ft 19.9s 16s
OK AMW K1250 16.40lb 100ft/s 817ft/s 21.1G 6,533ft 18.9s 17s
OK Loki K960 16.25lb 96ft/s 805ft/s 20.3G 6,575ft 19.1s 17s
OK Cesaroni K490 16.49lb 60ft/s 733ft/s 7.1G 6,630ft 20.3s 16s
OK Cesaroni K675 16.68lb 68ft/s 773ft/s 11.2G 6,661ft 19.7s 17s
OK Cesaroni K635 16.30lb 70ft/s 774ft/s 9.7G 6,673ft 19.8s 17s
OK Cesaroni K650 16.17lb 72ft/s 780ft/s 16.1G 6,760ft 19.8s 16s
OK AeroTech K828 17.30lb 83ft/s 822ft/s 16.0G 6,929ft 19.7s 17s
OK Cesaroni K1200 16.00lb 96ft/s 870ft/s 18.3G 6,945ft 19.4s 18s
OK Cesaroni K570 16.11lb 75ft/s 779ft/s 11.5G 7,060ft 20.2s 17s
OK AeroTech K1275 16.78lb 99ft/s 873ft/s 20.0G 7,140ft 19.6s 18s
OK Cesaroni K600 16.57lb 67ft/s 799ft/s 9.6G 7,163ft 20.5s 17s
OK Cesaroni K780 16.15lb 77ft/s 858ft/s 12.9G 7,305ft 20.2s 17s
OK AeroTech K375 17.04lb 89ft/s 716ft/s 16.8G 7,418ft 21.2s 15s
OK Cesaroni K260 16.91lb 49ft/s 642ft/s 4.8G 7,506ft 22.7s 14s
OK AeroTech K700 16.89lb 81ft/s 841ft/s 13.3G 7,639ft 20.6s 17s
OK AeroTech K480 16.98lb 72ft/s 799ft/s 11.1G 7,642ft 21.1s 16s
OK Cesaroni K815 17.24lb 72ft/s 885ft/s 14.7G 7,699ft 20.7s 18s
OK Cesaroni K750 16.93lb 76ft/s 879ft/s 11.8G 7,797ft 20.8s 18s
OK Cesaroni K711 17.25lb 76ft/s 872ft/s 18.8G 7,948ft 21.2s 18s
OK Cesaroni K820 16.77lb 82ft/s 910ft/s 21.2G 8,104ft 21.0s 18s
OK Cesaroni K1440 16.57lb 109ft/s 992ft/s 24.8G 8,125ft 20.5s 19s
OK Cesaroni K590 16.80lb 99ft/s 836ft/s 23.3G 8,259ft 21.5s 17s
OK Cesaroni K660 16.70lb 80ft/s 894ft/s 13.6G 8,343ft 21.5s 18s
OK Cesaroni K300 17.40lb 54ft/s 715ft/s 6.0G 8,449ft 23.4s 15s
OK AeroTech K1050 17.26lb 90ft/s 979ft/s 18.2G 8,480ft 21.2s 19s
OK AeroTech L1090 17.76lb 87ft/s 994ft/s 15.7G 8,921ft 21.8s 19s
OK AeroTech L1000 17.24lb 91ft/s 1,023ft/s 16.3G 9,094ft 21.8s 19s
OK Cesaroni L990 17.33lb 91ft/s 1,033ft/s 20.1G 9,314ft 22.0s 19s
OK Cesaroni L730 17.35lb 85ft/s 971ft/s 14.8G 9,335ft 22.4s 19s
OK Cesaroni L1030 17.55lb 85ft/s 1,062ft/s 18.8G 9,364ft 22.1s 19s
OK Cesaroni L640 17.35lb 96ft/s 916ft/s 19.1G 9,381ft 22.6s 18s
OK Cesaroni L805 17.92lb 81ft/s 1,003ft/s 17.5G 9,461ft 22.5s 19s
OK Cesaroni L935 18.00lb 87ft/s 1,090ft/s 18.2G 10,197ft 22.9s 20s
warningsD AMW K590 16.19lb 8:1 thrust/weight ratio (no data)
warningsD Gorilla K695 15.70lb 10:1 thrust/weight ratio (no data)
warningsD Gorilla K828 16.45lb 11:1 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 (25ft/s)
failedG Cesaroni I140 speed at end of launch guide too slow (28ft/s)
failedG AeroTech I215 speed at end of launch guide too slow (41ft/s)
failedG AeroTech I229 speed at end of launch guide too slow (41ft/s)
failedG AeroTech I115 speed at end of launch guide too slow (26ft/s)
failedG AeroTech I170 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni I150 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni I218 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni I120 speed at end of launch guide too slow (26ft/s)
failedG Cesaroni I165 speed at end of launch guide too slow (32ft/s)
failedG Cesaroni I100 speed at end of launch guide too slow (37ft/s)
failedG AeroTech I65 speed at end of launch guide too slow (30ft/s)
failedG Hypertek J115 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni J250 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni J145 speed at end of launch guide too slow (39ft/s)
failedG AeroTech J250 speed at end of launch guide too slow (46ft/s)
failedG AeroTech J90 speed at end of launch guide too slow (28ft/s)
failedG Cesaroni J280 speed at end of launch guide too slow (41ft/s)
failedG Hypertek J170 speed at end of launch guide too slow (45ft/s)
failedG AeroTech J250 speed at end of launch guide too slow (38ft/s)
failedG Hypertek J120 speed at end of launch guide too slow (37ft/s)
failedG AeroTech J180 speed at end of launch guide too slow (46ft/s)
failedG AeroTech J275 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni J240 speed at end of launch guide too slow (41ft/s)
failedG Hypertek J190 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni J210 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni J293 speed at end of launch guide too slow (44ft/s)
failedG Gorilla J365 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni J244 speed at end of launch guide too slow (38ft/s)
failedG Loki J350 speed at end of launch guide too slow (48ft/s)
failedG Gorilla J167 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni J360 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni J380 speed at end of launch guide too slow (47ft/s)
failedG AeroTech J135 speed at end of launch guide too slow (35ft/s)
failedG Loki J175 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni J140 speed at end of launch guide too slow (32ft/s)
failedG AeroTech K185 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni K160 speed at end of launch guide too slow (37ft/s)
failedG AeroTech K270 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni K261 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni L265 speed at end of launch guide too slow (48ft/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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