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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 72 motors that fit and appear to have enough thrust (684 motors didn't fit, 35 motors failed safety checks). 107 motor had thrust curves available and 231 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:   Alpha III XXXL 5.5
Owner: Jim Lane
Body Diameter: 5.54in
Dry Weight: 96.0oz
MMT Diameter: 38.0mm
MMT Length: 14.00in
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 Cesaroni G185 102.6oz 54ft/s 122ft/s 6.2G 248ft 4.2s 4s
warningsW AeroTech H283 104.7oz 72ft/s 195ft/s 10.5G 559ft 6.0s 5s
OK AeroTech H148 106.9oz 53ft/s 181ft/s 5.5G 577ft 6.4s 5s
OK AeroTech H130 104.4oz 61ft/s 177ft/s 7.9G 592ft 6.4s 5s
OK AeroTech H669 104.9oz 113ft/s 233ft/s 36.9G 679ft 6.4s 6s
OK Loki H125 108.1oz 53ft/s 189ft/s 5.8G 690ft 7.0s 5s
OK Loki H144 107.9oz 59ft/s 199ft/s 7.3G 700ft 6.9s 5s
OK AeroTech H219 105.2oz 65ft/s 221ft/s 9.0G 720ft 6.8s 6s
OK AeroTech H242 105.3oz 59ft/s 222ft/s 7.1G 757ft 7.1s 6s
OK Loki H160 107.8oz 66ft/s 219ft/s 8.6G 786ft 7.2s 6s
OK Cesaroni H400 106.0oz 82ft/s 258ft/s 14.0G 830ft 7.1s 6s
OK Cesaroni H152 106.5oz 50ft/s 236ft/s 6.2G 892ft 7.9s 6s
OK AeroTech H178 107.4oz 49ft/s 250ft/s 6.2G 921ft 7.9s 6s
OK Cesaroni H225 102.8oz 62ft/s 263ft/s 8.0G 929ft 7.7s 6s
OK AeroTech H170 107.6oz 53ft/s 268ft/s 5.8G 1,078ft 8.5s 6s
OK AeroTech I218 109.1oz 66ft/s 280ft/s 8.4G 1,082ft 8.3s 7s
OK AeroTech H550 107.4oz 103ft/s 318ft/s 20.7G 1,110ft 8.0s 7s
OK AeroTech H550 107.1oz 103ft/s 320ft/s 20.8G 1,116ft 8.0s 7s
OK AeroTech I180 109.6oz 75ft/s 267ft/s 10.9G 1,121ft 8.4s 6s
warningsW Cesaroni H565 108.8oz 97ft/s 324ft/s 20.2G 1,128ft 8.1s 7s
OK AeroTech I161 108.9oz 55ft/s 269ft/s 6.2G 1,135ft 8.7s 6s
OK AeroTech H999 107.7oz 137ft/s 336ft/s 52.7G 1,148ft 8.0s 8s
OK AeroTech I140 108.6oz 50ft/s 262ft/s 5.0G 1,158ft 9.0s 6s
OK Cesaroni I180 109.9oz 50ft/s 288ft/s 5.9G 1,159ft 8.8s 7s
OK AeroTech I225 113.1oz 57ft/s 303ft/s 7.8G 1,244ft 8.9s 7s
OK AeroTech I245 108.9oz 77ft/s 309ft/s 12.7G 1,255ft 8.7s 7s
OK Cesaroni I212 112.8oz 54ft/s 312ft/s 7.1G 1,263ft 9.0s 7s
OK AeroTech I357 108.1oz 76ft/s 320ft/s 11.6G 1,265ft 8.7s 7s
OK Cesaroni I566 109.6oz 94ft/s 371ft/s 19.3G 1,361ft 8.7s 8s
OK Cesaroni I195 110.7oz 58ft/s 329ft/s 6.7G 1,429ft 9.6s 8s
OK Cesaroni I345 109.9oz 74ft/s 373ft/s 11.8G 1,479ft 9.3s 8s
OK Cesaroni I170 109.8oz 55ft/s 336ft/s 6.4G 1,482ft 9.7s 7s
OK Cesaroni I175 111.4oz 51ft/s 329ft/s 5.2G 1,485ft 9.9s 7s
OK AeroTech I285 113.4oz 72ft/s 362ft/s 11.0G 1,505ft 9.4s 8s
OK Cesaroni I236 110.1oz 62ft/s 357ft/s 9.2G 1,537ft 9.7s 8s
OK Cesaroni I800 112.1oz 113ft/s 417ft/s 27.6G 1,548ft 9.1s 9s
OK Cesaroni I223 113.4oz 57ft/s 363ft/s 7.1G 1,591ft 9.9s 8s
OK AeroTech I211 112.0oz 66ft/s 350ft/s 9.3G 1,594ft 9.8s 8s
OK AeroTech I1299 110.9oz 151ft/s 436ft/s 48.2G 1,596ft 9.1s 9s
OK AeroTech I305 116.5oz 75ft/s 375ft/s 11.6G 1,608ft 9.6s 8s
OK AeroTech I195 116.2oz 69ft/s 350ft/s 10.2G 1,615ft 9.9s 8s
OK AeroTech I300 111.6oz 78ft/s 382ft/s 14.0G 1,627ft 9.7s 8s
OK Loki I316 115.0oz 86ft/s 401ft/s 14.7G 1,759ft 9.9s 8s
OK Cesaroni I287 117.3oz 65ft/s 413ft/s 9.5G 1,804ft 10.3s 8s
OK Loki I210 115.0oz 75ft/s 380ft/s 12.8G 1,837ft 10.3s 8s
OK Loki I405 115.2oz 104ft/s 438ft/s 24.1G 1,870ft 10.0s 9s
OK Cesaroni I285 113.8oz 69ft/s 428ft/s 10.1G 1,925ft 10.5s 9s
OK Cesaroni I255 114.2oz 66ft/s 424ft/s 9.0G 1,953ft 10.7s 9s
OK Loki I377 115.8oz 93ft/s 445ft/s 19.4G 1,973ft 10.3s 9s
OK Loki I430 115.0oz 83ft/s 471ft/s 15.6G 1,974ft 10.3s 9s
OK AeroTech I327 118.2oz 77ft/s 455ft/s 12.2G 2,019ft 10.6s 9s
OK AMW I297 116.8oz 71ft/s 448ft/s 10.5G 2,024ft 10.7s 9s
OK AeroTech I366 115.6oz 85ft/s 462ft/s 14.2G 2,026ft 10.5s 9s
OK AeroTech I364 119.9oz 75ft/s 454ft/s 11.5G 2,038ft 10.6s 9s
OK Cesaroni I470 113.5oz 91ft/s 494ft/s 16.7G 2,054ft 10.4s 9s
OK Cesaroni I303 113.6oz 72ft/s 453ft/s 12.1G 2,058ft 10.7s 9s
OK Cesaroni I242 115.4oz 61ft/s 438ft/s 7.9G 2,084ft 11.1s 9s
OK AeroTech I280 117.7oz 67ft/s 455ft/s 9.3G 2,091ft 10.9s 9s
OK AeroTech I435 114.3oz 102ft/s 504ft/s 22.8G 2,175ft 10.6s 9s
OK Cesaroni I350 123.6oz 73ft/s 485ft/s 10.7G 2,197ft 11.0s 9s
OK AeroTech I284 115.6oz 82ft/s 483ft/s 14.1G 2,228ft 10.9s 9s
OK AeroTech I500 116.3oz 89ft/s 545ft/s 16.8G 2,351ft 10.9s 10s
OK AeroTech I600 117.2oz 111ft/s 565ft/s 24.1G 2,399ft 10.9s 10s
OK AeroTech I350 117.7oz 81ft/s 546ft/s 13.9G 2,427ft 11.3s 10s
OK AeroTech J420 118.9oz 86ft/s 542ft/s 15.9G 2,429ft 11.2s 10s
OK AeroTech J350 119.5oz 101ft/s 545ft/s 23.8G 2,452ft 11.1s 10s
OK Cesaroni J285 117.0oz 70ft/s 510ft/s 10.2G 2,462ft 11.6s 9s
OK AeroTech J340 116.4oz 86ft/s 534ft/s 17.6G 2,463ft 11.3s 9s
OK Cesaroni J357 117.2oz 81ft/s 544ft/s 14.8G 2,487ft 11.4s 10s
OK AeroTech J425 118.3oz 76ft/s 578ft/s 12.6G 2,549ft 11.5s 10s
OK AeroTech J270 118.6oz 69ft/s 528ft/s 9.9G 2,651ft 12.0s 9s
OK AeroTech J500 119.1oz 102ft/s 606ft/s 22.9G 2,685ft 11.5s 10s

W Motor total weight unknown, lift-off Weight not accurate.

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
failedA AeroTech G339 rocket doesn't reach a safe altitude (211ft)
failedG AeroTech G67 speed at end of launch guide too slow (33ft/s)
failedG Loki G69 speed at end of launch guide too slow (34ft/s)
failedG AeroTech G61 speed at end of launch guide too slow (31ft/s)
failedG Loki G70 speed at end of launch guide too slow (35ft/s)
failedG Loki G94 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni G69 speed at end of launch guide too slow (30ft/s)
failedG Loki G80 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni G46 speed at end of launch guide too slow (23ft/s)
failedG Cesaroni G79 speed at end of launch guide too slow (30ft/s)
failedG Loki G66 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni G60 speed at end of launch guide too slow (31ft/s)
failedG AeroTech G69 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (24ft/s)
failedG Cesaroni G115 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni G78 speed at end of launch guide too slow (32ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (22ft/s)
failedG AeroTech H73 speed at end of launch guide too slow (29ft/s)
failedG Loki H100 speed at end of launch guide too slow (42ft/s)
failedG AeroTech H123 speed at end of launch guide too slow (44ft/s)
failedG AeroTech H100 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni H123 speed at end of launch guide too slow (41ft/s)
failedG Loki H90 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni H143 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni H120 speed at end of launch guide too slow (44ft/s)
failedG AeroTech H112 speed at end of launch guide too slow (35ft/s)
failedG Cesaroni H110 speed at end of launch guide too slow (39ft/s)
failedG Cesaroni H125 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni H100 speed at end of launch guide too slow (39ft/s)
failedG AeroTech H45 speed at end of launch guide too slow (31ft/s)
failedG AeroTech I154 speed at end of launch guide too slow (45ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (22ft/s)
failedG Cesaroni I55 speed at end of launch guide too slow (24ft/s)
failedG AeroTech I59 speed at end of launch guide too slow (44ft/s)
failedG Loki I110 speed at end of launch guide too slow (47ft/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.)

A The minimum altitude check is used to ensure that the rocket flies high enough to ensure time for a safe recovery. In addition, many barometric altimeters require a minimum altitude to detect lift-off. (The minimum altitude is 10m or 33ft for an A motor and doubles for each impulse class).

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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