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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 82 motors that fit and appear to have enough thrust (679 motors didn't fit, 30 motors failed safety checks). 110 motor had thrust curves available and 217 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:   Stealth, Jr. no av bay
Owner: Ron Ellis
Body Diameter: 2.60in
Dry Weight: 25.0oz
MMT Diameter: 29.0mm
MMT Length: 15.00in
CD: 0.65

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 F120 28.7oz 68ft/s 210ft/s 17.0G 557ft 5.9s 5s
OK AeroTech F42 27.7oz 48ft/s 184ft/s 7.9G 563ft 6.1s 5s
OK AeroTech F50 28.0oz 51ft/s 234ft/s 8.3G 766ft 7.0s 6s
OK AeroTech F52 29.3oz 52ft/s 233ft/s 8.7G 792ft 7.1s 6s
warningsW Estes F50 27.9oz 51ft/s 258ft/s 9.1G 900ft 7.5s 6s
OK AeroTech G54 29.8oz 49ft/s 255ft/s 8.8G 902ft 7.5s 6s
OK Cesaroni G88 30.4oz 56ft/s 286ft/s 12.8G 948ft 7.5s 7s
OK AeroTech G104 29.8oz 66ft/s 292ft/s 13.7G 982ft 7.6s 7s
OK AeroTech G74 28.1oz 54ft/s 305ft/s 10.7G 1,030ft 7.8s 7s
OK AeroTech G53 30.1oz 54ft/s 275ft/s 9.3G 1,059ft 8.1s 6s
OK Cesaroni G80 30.1oz 53ft/s 317ft/s 10.8G 1,108ft 8.1s 7s
OK AeroTech G77 30.8oz 48ft/s 329ft/s 9.6G 1,194ft 8.5s 7s
OK AeroTech G77 29.3oz 54ft/s 348ft/s 11.1G 1,245ft 8.5s 7s
OK AeroTech G79 30.5oz 55ft/s 343ft/s 10.7G 1,279ft 8.6s 7s
OK Cesaroni G83 30.1oz 58ft/s 348ft/s 11.0G 1,289ft 8.6s 7s
OK Cesaroni G68 30.5oz 49ft/s 334ft/s 9.8G 1,290ft 8.8s 7s
OK Cesaroni G57 30.1oz 51ft/s 322ft/s 9.5G 1,307ft 8.9s 7s
OK Cesaroni G250 30.0oz 91ft/s 408ft/s 33.8G 1,340ft 8.4s 8s
OK AeroTech G76 30.2oz 73ft/s 346ft/s 17.0G 1,403ft 8.8s 7s
OK Cesaroni G126 30.1oz 68ft/s 399ft/s 18.0G 1,419ft 8.7s 8s
OK AeroTech G64 30.3oz 59ft/s 342ft/s 11.8G 1,444ft 9.1s 7s
OK AeroTech G75 29.6oz 56ft/s 375ft/s 11.2G 1,482ft 9.1s 7s
OK Cesaroni G131 32.1oz 68ft/s 412ft/s 15.6G 1,486ft 8.9s 8s
OK AeroTech G78 29.4oz 56ft/s 393ft/s 11.4G 1,518ft 9.1s 7s
OK AeroTech G125 29.4oz 65ft/s 441ft/s 17.4G 1,561ft 9.0s 8s
OK AeroTech G80 29.5oz 61ft/s 408ft/s 11.7G 1,610ft 9.3s 8s
OK Cesaroni G106 31.6oz 57ft/s 441ft/s 13.9G 1,661ft 9.5s 8s
OK KBA G82 33.1oz 49ft/s 412ft/s 9.7G 1,693ft 9.8s 8s
OK KBA G135 33.0oz 62ft/s 461ft/s 16.2G 1,704ft 9.5s 8s
OK Cesaroni G125 31.9oz 68ft/s 502ft/s 17.2G 1,919ft 9.9s 9s
OK AeroTech H165 32.1oz 77ft/s 522ft/s 20.5G 1,919ft 9.8s 9s
OK Cesaroni G118 31.6oz 65ft/s 499ft/s 16.8G 1,927ft 9.9s 9s
OK Cesaroni H175 33.7oz 78ft/s 532ft/s 23.4G 1,940ft 9.8s 9s
OK Cesaroni H133 31.7oz 72ft/s 513ft/s 20.8G 1,968ft 9.9s 9s
OK Cesaroni G54 31.8oz 63ft/s 391ft/s 12.7G 1,972ft 10.5s 7s
OK Cesaroni H410 31.4oz 119ft/s 599ft/s 59.2G 1,981ft 9.6s 9s
OK Cesaroni H163 31.6oz 76ft/s 546ft/s 23.7G 2,005ft 9.9s 9s
OK Cesaroni H90 30.7oz 67ft/s 492ft/s 17.2G 2,027ft 10.2s 8s
OK Cesaroni H87 32.2oz 57ft/s 484ft/s 13.3G 2,038ft 10.4s 8s
OK AeroTech H128 32.3oz 74ft/s 537ft/s 19.4G 2,040ft 10.0s 9s
OK AeroTech G138 30.2oz 66ft/s 571ft/s 19.8G 2,041ft 9.9s 9s
OK AeroTech H238 31.9oz 89ft/s 567ft/s 25.8G 2,055ft 9.9s 9s
OK Cesaroni H54 32.4oz 56ft/s 403ft/s 10.2G 2,061ft 10.8s 7s
OK Cesaroni H123 33.0oz 64ft/s 532ft/s 14.2G 2,079ft 10.3s 9s
OK AeroTech H115 32.2oz 62ft/s 535ft/s 12.8G 2,124ft 10.3s 9s
OK AeroTech H97 34.8oz 55ft/s 511ft/s 10.4G 2,177ft 10.7s 9s
OK Cesaroni H118 33.2oz 68ft/s 539ft/s 17.4G 2,197ft 10.4s 9s
OK Cesaroni H237 35.4oz 84ft/s 641ft/s 28.1G 2,310ft 10.4s 9s
OK AeroTech H220 33.8oz 93ft/s 641ft/s 31.7G 2,343ft 10.4s 9s
OK KBA H130 50.0oz 63ft/s 479ft/s 14.8G 2,361ft 11.4s 10s
OK AeroTech H210 33.7oz 86ft/s 653ft/s 26.6G 2,387ft 10.5s 9s
OK Cesaroni H151 33.4oz 76ft/s 610ft/s 20.9G 2,388ft 10.6s 9s
OK Cesaroni H170 33.2oz 85ft/s 646ft/s 24.8G 2,479ft 10.6s 9s
OK Cesaroni H160 34.6oz 72ft/s 643ft/s 18.3G 2,487ft 10.8s 9s
OK AeroTech H182 32.3oz 73ft/s 686ft/s 20.2G 2,490ft 10.6s 9s
OK Cesaroni H135 33.9oz 71ft/s 616ft/s 16.6G 2,493ft 10.9s 9s
OK AeroTech H180 33.9oz 86ft/s 675ft/s 26.2G 2,541ft 10.7s 9s
OK AeroTech H250 34.0oz 103ft/s 713ft/s 33.3G 2,565ft 10.7s 10s
OK KBA H225 36.1oz 76ft/s 714ft/s 25.8G 2,649ft 11.0s 10s
OK AeroTech H195 31.9oz 94ft/s 742ft/s 27.6G 2,657ft 10.7s 10s
OK AeroTech H135 32.5oz 66ft/s 625ft/s 16.1G 2,666ft 11.2s 9s
OK Cesaroni H295 37.1oz 102ft/s 752ft/s 33.8G 2,667ft 10.8s 10s
OK Cesaroni H180 36.1oz 83ft/s 704ft/s 26.0G 2,779ft 11.2s 10s
OK Cesaroni H194 35.0oz 88ft/s 725ft/s 28.0G 2,786ft 11.1s 10s
OK Cesaroni H200 34.7oz 92ft/s 736ft/s 29.1G 2,831ft 11.1s 10s
OK Cesaroni H340 38.8oz 106ft/s 819ft/s 40.3G 2,892ft 11.1s 10s
OK Cesaroni H255 33.2oz 102ft/s 820ft/s 39.8G 2,913ft 11.0s 10s
OK Cesaroni H399 35.4oz 122ft/s 869ft/s 54.6G 2,924ft 11.0s 10s
OK Cesaroni H140 34.8oz 84ft/s 691ft/s 24.4G 2,944ft 11.5s 9s
OK Cesaroni H226 37.7oz 97ft/s 795ft/s 32.4G 3,110ft 11.5s 10s
OK AeroTech H268 37.6oz 96ft/s 837ft/s 30.7G 3,131ft 11.5s 10s
OK Cesaroni H159 37.1oz 73ft/s 753ft/s 17.2G 3,144ft 11.8s 10s
OK Cesaroni H233 36.6oz 94ft/s 834ft/s 32.5G 3,172ft 11.5s 10s
OK Cesaroni H255 36.2oz 100ft/s 869ft/s 40.1G 3,208ft 11.5s 10s
OK Cesaroni H160 36.3oz 96ft/s 755ft/s 30.4G 3,258ft 11.8s 10s
OK AeroTech I200 37.6oz 92ft/s 806ft/s 28.0G 3,278ft 11.7s 10s
OK Cesaroni I204 37.3oz 97ft/s 852ft/s 33.5G 3,427ft 11.8s 10s
OK AeroTech I205 36.1oz 88ft/s 876ft/s 35.3G 3,428ft 11.7s 10s
OK Cesaroni I243 39.1oz 105ft/s 912ft/s 39.2G 3,637ft 12.0s 10s
OK Cesaroni I224 38.1oz 106ft/s 914ft/s 40.0G 3,642ft 12.0s 10s
OK KBA J520 50.5oz 114ft/s 1,328ft/s 49.9G 4,944ft 13.5s 12s
warningsW,D Estes G80 29.4oz 9:1 thrust/weight ratio (no data)

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

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 Estes E16 speed at end of launch guide too slow (25ft/s)
failedG AeroTech E23 speed at end of launch guide too slow (35ft/s)
failedG AeroTech E16 speed at end of launch guide too slow (28ft/s)
failedG AeroTech F23 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (36ft/s)
failedG AeroTech F27 speed at end of launch guide too slow (34ft/s)
failedG Estes F15 speed at end of launch guide too slow (23ft/s)
failedG AeroTech F37 speed at end of launch guide too slow (35ft/s)
failedG AeroTech F62 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (36ft/s)
failedG AeroTech F20 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni F32 speed at end of launch guide too slow (32ft/s)
failedG Cesaroni F29 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni F31 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni F59 speed at end of launch guide too slow (47ft/s)
failed5 Estes F26 average thrust fails 5:1 thrust/weight ratio (3:1)
failedG AeroTech F26 speed at end of launch guide too slow (33ft/s)
failedG AeroTech F22 speed at end of launch guide too slow (28ft/s)
failedG Apogee F10 speed at end of launch guide too slow (26ft/s)
failedG AeroTech F25 speed at end of launch guide too slow (43ft/s)
failedG AeroTech F40 speed at end of launch guide too slow (46ft/s)
failedG AeroTech G38 speed at end of launch guide too slow (40ft/s)
failedG Estes G40 speed at end of launch guide too slow (47ft/s)
failedG AeroTech G79 speed at end of launch guide too slow (48ft/s)
failedG AeroTech G40 speed at end of launch guide too slow (47ft/s)
failedG AeroTech G25 speed at end of launch guide too slow (34ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni G33 speed at end of launch guide too slow (32ft/s)
failedG Cesaroni H42 speed at end of launch guide too slow (39ft/s)
failedG Cesaroni H53 speed at end of launch guide too slow (47ft/s)

G These simulations were run with a launch guide length of 5ft (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.)

5 The 5:1 thrust-to-weight ratio check is a useful rule of thumb, but it does break down for motors with unusual thrust curves. For example, motors with a high initial thrust and a long tail-off may fail this test but still be safe for use.

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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