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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 55 motors that fit and appear to have enough thrust (693 motors didn't fit, 62 motors failed safety checks). 115 motor had thrust curves available and 229 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:   Still Testing B4 with avionics
Owner: Christopher Texler
Body Diameter: 2.50in
Dry Weight: 1.800Kg
MMT Diameter: 29.0mm
MMT Length: 15.00in
CD: 0.20

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 G104 1.936Kg 52ft/s 117ft/s 5.4G 267ft 4.5s 4s
OK AeroTech G76 1.947Kg 55ft/s 144ft/s 6.9G 469ft 5.9s 4s
OK Cesaroni G250 1.941Kg 81ft/s 173ft/s 14.3G 486ft 5.7s 5s
OK Cesaroni G126 1.945Kg 57ft/s 167ft/s 7.3G 503ft 6.0s 5s
OK Cesaroni G131 2.000Kg 54ft/s 177ft/s 7.1G 560ft 6.3s 5s
OK AeroTech G125 1.925Kg 56ft/s 184ft/s 7.3G 598ft 6.5s 6s
OK KBA G135 2.026Kg 53ft/s 204ft/s 7.1G 717ft 7.2s 6s
OK Cesaroni G118 1.988Kg 54ft/s 222ft/s 7.0G 889ft 8.0s 7s
OK Cesaroni G125 1.994Kg 58ft/s 225ft/s 7.3G 900ft 8.0s 7s
OK AeroTech H165 2.002Kg 65ft/s 235ft/s 8.8G 936ft 8.0s 7s
OK Cesaroni H90 1.963Kg 52ft/s 220ft/s 7.1G 941ft 8.4s 7s
OK Cesaroni H133 1.990Kg 59ft/s 232ft/s 8.8G 951ft 8.2s 7s
OK Cesaroni H175 2.047Kg 65ft/s 242ft/s 11.3G 976ft 8.2s 7s
OK Cesaroni H163 1.987Kg 63ft/s 245ft/s 10.1G 1,017ft 8.4s 7s
OK AeroTech G138 1.948Kg 56ft/s 249ft/s 9.4G 1,035ft 8.5s 7s
OK AeroTech H128 2.006Kg 62ft/s 245ft/s 8.3G 1,050ft 8.5s 7s
OK Cesaroni H123 2.028Kg 53ft/s 243ft/s 6.5G 1,052ft 8.7s 7s
OK AeroTech H115 2.005Kg 52ft/s 245ft/s 5.4G 1,085ft 8.9s 7s
OK Cesaroni H410 1.982Kg 107ft/s 267ft/s 26.1G 1,091ft 8.4s 8s
OK AeroTech H238 1.996Kg 74ft/s 259ft/s 11.4G 1,111ft 8.6s 8s
OK Cesaroni H118 2.032Kg 57ft/s 256ft/s 7.5G 1,205ft 9.2s 8s
OK KBA H130 2.509Kg 57ft/s 270ft/s 7.9G 1,370ft 9.9s 8s
OK Cesaroni H237 2.094Kg 74ft/s 305ft/s 14.1G 1,463ft 9.8s 9s
OK Cesaroni H151 2.038Kg 66ft/s 294ft/s 9.2G 1,473ft 10.0s 9s
OK AeroTech H220 2.050Kg 78ft/s 306ft/s 14.3G 1,493ft 9.9s 9s
OK AeroTech H210 2.046Kg 73ft/s 310ft/s 12.2G 1,533ft 10.1s 9s
OK Cesaroni H135 2.051Kg 58ft/s 301ft/s 7.2G 1,564ft 10.5s 9s
OK Cesaroni H160 2.072Kg 62ft/s 312ft/s 8.4G 1,606ft 10.5s 9s
OK Cesaroni H170 2.032Kg 70ft/s 313ft/s 10.9G 1,629ft 10.4s 9s
OK AeroTech H182 2.007Kg 66ft/s 322ft/s 9.5G 1,657ft 10.6s 9s
OK AeroTech H135 2.012Kg 56ft/s 312ft/s 6.8G 1,740ft 11.1s 9s
OK AeroTech H180 2.052Kg 72ft/s 330ft/s 11.8G 1,763ft 10.8s 10s
OK AeroTech H250 2.056Kg 86ft/s 346ft/s 15.0G 1,846ft 10.9s 10s
OK KBA H225 2.116Kg 67ft/s 351ft/s 12.8G 1,902ft 11.3s 10s
OK AeroTech H169 2.002Kg 76ft/s 344ft/s 11.0G 1,935ft 11.3s 10s
OK AeroTech H195 1.997Kg 76ft/s 358ft/s 12.0G 1,998ft 11.5s 10s
OK Cesaroni H295 2.142Kg 86ft/s 371ft/s 17.7G 2,072ft 11.6s 11s
OK Cesaroni H180 2.114Kg 73ft/s 362ft/s 12.0G 2,117ft 11.9s 10s
OK Cesaroni H194 2.084Kg 75ft/s 368ft/s 12.8G 2,149ft 11.9s 11s
OK Cesaroni H200 2.074Kg 76ft/s 376ft/s 13.3G 2,233ft 12.1s 11s
OK Cesaroni H140 2.077Kg 70ft/s 365ft/s 11.0G 2,278ft 12.4s 10s
OK Cesaroni H340 2.191Kg 97ft/s 418ft/s 19.7G 2,542ft 12.6s 12s
OK Cesaroni H255 2.032Kg 86ft/s 411ft/s 17.9G 2,551ft 12.6s 12s
OK Cesaroni H399 2.094Kg 107ft/s 430ft/s 25.6G 2,623ft 12.8s 12s
OK Cesaroni H159 2.143Kg 64ft/s 408ft/s 7.9G 2,661ft 13.4s 12s
OK Cesaroni H226 2.160Kg 83ft/s 429ft/s 15.5G 2,814ft 13.4s 12s
OK AeroTech H268 2.158Kg 85ft/s 443ft/s 14.8G 2,885ft 13.5s 12s
OK Cesaroni H160 2.119Kg 79ft/s 420ft/s 14.2G 2,930ft 13.8s 12s
OK Cesaroni H233 2.128Kg 82ft/s 445ft/s 15.3G 2,976ft 13.8s 12s
OK Cesaroni H255 2.118Kg 90ft/s 460ft/s 18.9G 3,092ft 14.0s 13s
OK AeroTech I200 2.158Kg 78ft/s 447ft/s 13.3G 3,118ft 14.2s 12s
OK Cesaroni I204 2.149Kg 84ft/s 483ft/s 16.0G 3,506ft 14.9s 13s
OK AeroTech I205 2.115Kg 76ft/s 488ft/s 16.5G 3,564ft 15.1s 13s
OK Cesaroni I224 2.170Kg 90ft/s 525ft/s 19.4G 4,032ft 15.8s 14s
OK Cesaroni I243 2.199Kg 86ft/s 531ft/s 19.2G 4,046ft 15.9s 14s

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
failed5 Estes E16 average thrust fails 5:1 thrust/weight ratio (1:1)
failedG AeroTech E23 speed at end of launch guide too slow (19ft/s)
failedG AeroTech E16 speed at end of launch guide too slow (9ft/s)
failedG AeroTech F23 speed at end of launch guide too slow (22ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (25ft/s)
failedG AeroTech F27 speed at end of launch guide too slow (21ft/s)
failed5 Estes F15 average thrust fails 5:1 thrust/weight ratio (1:1)
failedG AeroTech F37 speed at end of launch guide too slow (27ft/s)
failedG AeroTech F62 speed at end of launch guide too slow (35ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (26ft/s)
failedG AeroTech F20 speed at end of launch guide too slow (24ft/s)
failedG Cesaroni F32 speed at end of launch guide too slow (22ft/s)
failedG AeroTech F42 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni F29 speed at end of launch guide too slow (20ft/s)
failedG Cesaroni F31 speed at end of launch guide too slow (22ft/s)
failedA Cesaroni F120 rocket doesn't reach a safe altitude (120ft)
failedG Cesaroni F59 speed at end of launch guide too slow (37ft/s)
failedG AeroTech F67 speed at end of launch guide too slow (43ft/s)
failed5 Estes F26 average thrust fails 5:1 thrust/weight ratio (1:1)
failedG AeroTech F26 speed at end of launch guide too slow (20ft/s)
failedG AeroTech F22 speed at end of launch guide too slow (17ft/s)
failedG AeroTech F52 speed at end of launch guide too slow (39ft/s)
failed5 Apogee F10 average thrust fails 5:1 thrust/weight ratio (1:1)
failedG AeroTech F50 speed at end of launch guide too slow (37ft/s)
failedG Estes F50 speed at end of launch guide too slow (40ft/s)
failedG AeroTech F25 speed at end of launch guide too slow (30ft/s)
failedG AeroTech F40 speed at end of launch guide too slow (34ft/s)
failedG AeroTech G54 speed at end of launch guide too slow (40ft/s)
failedG AeroTech G74 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni G88 speed at end of launch guide too slow (44ft/s)
failedG AeroTech G38 speed at end of launch guide too slow (27ft/s)
failedG AeroTech G53 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni G80 speed at end of launch guide too slow (43ft/s)
failedG Estes G40 speed at end of launch guide too slow (36ft/s)
failedG AeroTech G77 speed at end of launch guide too slow (43ft/s)
failedG AeroTech G77 speed at end of launch guide too slow (40ft/s)
failedG AeroTech G72 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni G83 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni G57 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni G68 speed at end of launch guide too slow (39ft/s)
failedG AeroTech G79 speed at end of launch guide too slow (40ft/s)
failedG AeroTech G79 speed at end of launch guide too slow (45ft/s)
failedG AeroTech G78 speed at end of launch guide too slow (45ft/s)
failedG AeroTech G40 speed at end of launch guide too slow (36ft/s)
failedG AeroTech G25 speed at end of launch guide too slow (24ft/s)
failedG AeroTech G64 speed at end of launch guide too slow (47ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (45ft/s)
failedG AeroTech G80 speed at end of launch guide too slow (47ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (38ft/s)
failed5 AeroTech G8 average thrust fails 5:1 thrust/weight ratio (0:1)
failed5 Estes G80 average thrust fails 5:1 thrust/weight ratio (4:1)
failedG Cesaroni G106 speed at end of launch guide too slow (47ft/s)
failed5 AeroTech G11 average thrust fails 5:1 thrust/weight ratio (1:1)
failed5 AeroTech G12 average thrust fails 5:1 thrust/weight ratio (1:1)
failedG KBA G82 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni G33 speed at end of launch guide too slow (23ft/s)
failedG Cesaroni G54 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni H54 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni H87 speed at end of launch guide too slow (46ft/s)
failedG AeroTech H97 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni H42 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni H53 speed at end of launch guide too slow (38ft/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.)

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.

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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