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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 54 motors that fit and appear to have enough thrust (713 motors didn't fit, 38 motors failed safety checks). 92 motor had thrust curves available and 206 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 38mm Adapter
Owner: Michael Erwin
Body Diameter: 4.00in
Dry Weight: 2,523g
MMT Diameter: 38.0mm
MMT Length: 304.0mm
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 G339 2,704g 74ft/s 125ft/s 13.2G 246ft 4.0s 4s
OK Cesaroni G185 2,711g 50ft/s 132ft/s 6.8G 290ft 4.5s 4s
warningsW AeroTech H283 2,770g 68ft/s 211ft/s 11.3G 651ft 6.5s 6s
OK AeroTech H148 2,832g 49ft/s 198ft/s 6.0G 673ft 6.9s 5s
OK AeroTech H130 2,760g 59ft/s 194ft/s 8.6G 691ft 6.9s 5s
OK AeroTech H669 2,775g 105ft/s 251ft/s 39.7G 790ft 6.8s 6s
OK Loki H125 2,865g 50ft/s 207ft/s 6.3G 805ft 7.5s 6s
OK Loki H144 2,859g 57ft/s 217ft/s 7.9G 814ft 7.4s 6s
OK AeroTech H219 2,784g 62ft/s 241ft/s 9.7G 840ft 7.3s 6s
OK AeroTech H242 2,787g 56ft/s 242ft/s 7.7G 883ft 7.6s 6s
OK Loki H160 2,858g 63ft/s 238ft/s 9.3G 914ft 7.7s 6s
OK Cesaroni H400 2,807g 76ft/s 279ft/s 15.1G 966ft 7.7s 7s
OK Cesaroni H225 2,716g 59ft/s 287ft/s 8.7G 1,087ft 8.3s 7s
OK AeroTech H170 2,853g 50ft/s 293ft/s 6.3G 1,258ft 9.1s 7s
OK AeroTech I218 2,895g 61ft/s 305ft/s 9.1G 1,260ft 8.9s 7s
OK AeroTech H550 2,846g 94ft/s 343ft/s 22.3G 1,292ft 8.6s 8s
OK AeroTech H550 2,839g 94ft/s 346ft/s 22.4G 1,300ft 8.6s 8s
OK AeroTech I180 2,908g 69ft/s 291ft/s 11.7G 1,303ft 9.0s 7s
warningsW Cesaroni H565 2,885g 93ft/s 349ft/s 21.8G 1,313ft 8.7s 8s
OK AeroTech I161 2,889g 51ft/s 294ft/s 6.7G 1,324ft 9.3s 7s
OK AeroTech H999 2,854g 127ft/s 361ft/s 56.4G 1,336ft 8.6s 8s
OK AeroTech I225 3,009g 52ft/s 330ft/s 8.4G 1,446ft 9.6s 8s
OK AeroTech I245 2,888g 74ft/s 336ft/s 13.6G 1,460ft 9.3s 8s
OK Cesaroni I212 2,998g 50ft/s 339ft/s 7.7G 1,471ft 9.7s 8s
OK AeroTech I357 2,866g 71ft/s 348ft/s 12.5G 1,473ft 9.4s 8s
OK Cesaroni I566 2,907g 89ft/s 400ft/s 20.8G 1,586ft 9.4s 9s
OK Cesaroni I195 2,940g 53ft/s 359ft/s 7.2G 1,666ft 10.3s 8s
OK Cesaroni I345 2,918g 72ft/s 403ft/s 12.6G 1,723ft 10.0s 9s
OK Cesaroni I170 2,915g 51ft/s 366ft/s 6.9G 1,728ft 10.5s 8s
OK Cesaroni I175 2,960g 48ft/s 360ft/s 5.7G 1,730ft 10.6s 8s
OK AeroTech I285 3,016g 67ft/s 392ft/s 11.8G 1,750ft 10.1s 9s
OK Cesaroni I236 2,923g 59ft/s 389ft/s 9.8G 1,792ft 10.4s 9s
OK Cesaroni I800 2,980g 107ft/s 449ft/s 29.8G 1,802ft 9.9s 9s
OK Cesaroni I223 3,017g 53ft/s 395ft/s 7.6G 1,852ft 10.6s 9s
OK AeroTech I211 2,978g 62ft/s 381ft/s 10.0G 1,855ft 10.6s 8s
OK AeroTech I1299 2,945g 140ft/s 468ft/s 51.8G 1,860ft 9.8s 10s
OK AeroTech I305 3,104g 69ft/s 406ft/s 12.5G 1,866ft 10.3s 9s
OK AeroTech I195 3,095g 65ft/s 381ft/s 10.9G 1,874ft 10.6s 8s
OK AeroTech I300 2,964g 74ft/s 414ft/s 15.0G 1,894ft 10.4s 9s
OK Loki I316 3,063g 81ft/s 434ft/s 15.7G 2,044ft 10.6s 9s
OK Cesaroni I287 3,128g 60ft/s 447ft/s 10.2G 2,097ft 11.0s 9s
OK Loki I210 3,063g 69ft/s 414ft/s 13.7G 2,133ft 11.1s 9s
OK Loki I405 3,066g 97ft/s 473ft/s 25.7G 2,175ft 10.8s 10s
OK Cesaroni I285 3,029g 65ft/s 465ft/s 10.9G 2,242ft 11.3s 9s
OK Cesaroni I255 3,039g 62ft/s 462ft/s 9.6G 2,273ft 11.5s 9s
OK Loki I377 3,083g 87ft/s 482ft/s 20.8G 2,295ft 11.1s 10s
OK Loki I430 3,063g 80ft/s 509ft/s 16.7G 2,299ft 11.1s 10s
OK AeroTech I366 3,079g 79ft/s 501ft/s 15.2G 2,358ft 11.3s 10s
OK Cesaroni I470 3,018g 86ft/s 534ft/s 17.8G 2,395ft 11.2s 10s
OK Cesaroni I303 3,023g 67ft/s 493ft/s 12.9G 2,396ft 11.5s 10s
OK Cesaroni I242 3,073g 58ft/s 478ft/s 8.5G 2,425ft 11.9s 9s
OK AeroTech I435 3,041g 97ft/s 546ft/s 24.3G 2,534ft 11.4s 10s
OK AeroTech I284 3,079g 77ft/s 525ft/s 15.1G 2,593ft 11.7s 10s
OK Cesaroni J357 3,124g 73ft/s 590ft/s 15.8G 2,896ft 12.3s 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
failedG AeroTech G67 speed at end of launch guide too slow (31ft/s)
failedG Loki G69 speed at end of launch guide too slow (33ft/s)
failedG AeroTech G61 speed at end of launch guide too slow (29ft/s)
failedG Loki G70 speed at end of launch guide too slow (33ft/s)
failedG Loki G94 speed at end of launch guide too slow (39ft/s)
failedG Cesaroni G69 speed at end of launch guide too slow (28ft/s)
failedG Loki G80 speed at end of launch guide too slow (36ft/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 (29ft/s)
failedG Loki G66 speed at end of launch guide too slow (36ft/s)
failedG Cesaroni G60 speed at end of launch guide too slow (30ft/s)
failedG AeroTech G69 speed at end of launch guide too slow (29ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (23ft/s)
failedG Cesaroni G115 speed at end of launch guide too slow (39ft/s)
failedG Cesaroni G78 speed at end of launch guide too slow (31ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (21ft/s)
failedG AeroTech H73 speed at end of launch guide too slow (28ft/s)
failedG Loki H100 speed at end of launch guide too slow (39ft/s)
failedG AeroTech H123 speed at end of launch guide too slow (42ft/s)
failedG AeroTech H100 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni H123 speed at end of launch guide too slow (38ft/s)
failedG Loki H90 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni H143 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni H120 speed at end of launch guide too slow (41ft/s)
failedG AeroTech H112 speed at end of launch guide too slow (33ft/s)
failedG Cesaroni H110 speed at end of launch guide too slow (36ft/s)
failedG Cesaroni H152 speed at end of launch guide too slow (47ft/s)
failedG AeroTech H178 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni H125 speed at end of launch guide too slow (39ft/s)
failedG Cesaroni H100 speed at end of launch guide too slow (37ft/s)
failedG AeroTech H45 speed at end of launch guide too slow (29ft/s)
failedG AeroTech I140 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni I180 speed at end of launch guide too slow (47ft/s)
failedG AeroTech I154 speed at end of launch guide too slow (42ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (21ft/s)
failedG Cesaroni I55 speed at end of launch guide too slow (23ft/s)
failedG AeroTech I59 speed at end of launch guide too slow (42ft/s)
failedG Loki I110 speed at end of launch guide too slow (44ft/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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