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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 86 motors that fit and appear to have enough thrust (684 motors didn't fit, 21 motors failed safety checks). 105 motor had thrust curves available and 208 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:   EAC Viper XL
Owner: Jim Lane
Body Diameter: 3.00in
Dry Weight: 29.0oz
MMT Diameter: 29.0mm
MMT Length: 14.00in
CD: 1.00

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 F62 32.8oz 55ft/s 154ft/s 6.0G 359ft 4.9s 4s
OK Cesaroni F120 32.7oz 82ft/s 181ft/s 14.7G 391ft 4.9s 4s
OK AeroTech F42 31.7oz 56ft/s 152ft/s 6.8G 393ft 5.2s 4s
OK Cesaroni F59 32.5oz 57ft/s 167ft/s 6.8G 397ft 5.1s 4s
OK AeroTech F50 32.0oz 59ft/s 194ft/s 7.2G 527ft 5.8s 4s
OK AeroTech F25 32.2oz 51ft/s 158ft/s 5.4G 531ft 6.2s 3s
OK AeroTech F52 33.3oz 61ft/s 193ft/s 7.5G 548ft 5.9s 4s
OK AeroTech F40 33.5oz 54ft/s 185ft/s 6.3G 590ft 6.3s 4s
warningsW Estes F50 31.9oz 61ft/s 213ft/s 7.8G 613ft 6.2s 5s
OK AeroTech G54 33.8oz 59ft/s 211ft/s 7.6G 621ft 6.2s 5s
OK Cesaroni G88 34.4oz 65ft/s 242ft/s 11.2G 649ft 6.2s 5s
OK AeroTech G104 33.8oz 76ft/s 247ft/s 12.0G 670ft 6.2s 5s
OK AeroTech G74 32.1oz 66ft/s 254ft/s 9.1G 693ft 6.4s 5s
OK AeroTech G53 34.1oz 64ft/s 225ft/s 8.1G 724ft 6.7s 5s
OK Cesaroni G80 34.1oz 62ft/s 267ft/s 9.4G 750ft 6.6s 5s
OK AeroTech G77 34.8oz 59ft/s 276ft/s 8.1G 807ft 6.9s 6s
warningsW Estes G40 33.3oz 56ft/s 232ft/s 6.9G 808ft 7.1s 5s
OK AeroTech G40 33.3oz 56ft/s 232ft/s 6.9G 808ft 7.1s 5s
OK AeroTech G77 33.3oz 62ft/s 289ft/s 9.3G 831ft 6.9s 6s
OK AeroTech G79 34.5oz 64ft/s 286ft/s 9.2G 860ft 7.0s 6s
OK Cesaroni G83 34.1oz 68ft/s 290ft/s 9.6G 865ft 7.0s 6s
OK Cesaroni G68 34.5oz 58ft/s 275ft/s 8.6G 870ft 7.2s 5s
OK AeroTech G79 33.4oz 56ft/s 279ft/s 7.6G 872ft 7.2s 5s
OK Cesaroni G57 34.1oz 61ft/s 261ft/s 8.3G 882ft 7.3s 5s
OK Cesaroni G250 34.0oz 114ft/s 351ft/s 29.2G 885ft 6.7s 6s
OK AeroTech G76 34.2oz 85ft/s 283ft/s 14.9G 941ft 7.2s 5s
OK Cesaroni G126 34.1oz 85ft/s 337ft/s 15.8G 941ft 7.0s 6s
OK AeroTech G64 34.3oz 71ft/s 279ft/s 10.3G 970ft 7.4s 5s
OK AeroTech G75 33.6oz 66ft/s 306ft/s 9.8G 987ft 7.4s 5s
OK Cesaroni G131 36.1oz 79ft/s 349ft/s 13.7G 989ft 7.2s 6s
OK AeroTech G78 33.4oz 67ft/s 324ft/s 9.8G 1,004ft 7.4s 6s
OK AeroTech G125 33.4oz 83ft/s 369ft/s 14.7G 1,023ft 7.2s 6s
OK AeroTech G80 33.5oz 71ft/s 335ft/s 10.2G 1,063ft 7.5s 6s
OK Cesaroni G106 35.6oz 68ft/s 368ft/s 12.3G 1,098ft 7.6s 6s
OK KBA G135 37.0oz 73ft/s 390ft/s 13.8G 1,125ft 7.6s 7s
OK KBA G82 37.1oz 58ft/s 342ft/s 8.0G 1,130ft 7.9s 6s
OK AeroTech G75 37.2oz 56ft/s 337ft/s 6.5G 1,198ft 8.3s 6s
OK AeroTech H165 36.1oz 90ft/s 438ft/s 17.8G 1,249ft 7.8s 7s
OK Cesaroni G125 35.9oz 82ft/s 416ft/s 15.2G 1,254ft 7.9s 7s
OK Cesaroni G118 35.6oz 76ft/s 413ft/s 14.8G 1,260ft 8.0s 7s
OK Cesaroni H175 37.7oz 89ft/s 451ft/s 19.2G 1,265ft 7.8s 7s
OK Cesaroni H410 35.4oz 146ft/s 515ft/s 51.3G 1,267ft 7.5s 7s
OK Cesaroni H133 35.7oz 87ft/s 425ft/s 18.3G 1,283ft 7.9s 7s
OK Cesaroni H163 35.6oz 94ft/s 457ft/s 20.9G 1,299ft 7.9s 7s
OK Cesaroni G54 35.8oz 74ft/s 310ft/s 11.1G 1,315ft 8.6s 6s
OK AeroTech G138 34.2oz 82ft/s 474ft/s 16.3G 1,315ft 7.9s 7s
OK Cesaroni H90 34.7oz 76ft/s 397ft/s 15.1G 1,327ft 8.2s 6s
OK AeroTech H128 36.3oz 89ft/s 445ft/s 16.9G 1,327ft 8.0s 7s
OK AeroTech H238 35.9oz 104ft/s 476ft/s 22.3G 1,328ft 7.8s 7s
OK Cesaroni H87 36.2oz 68ft/s 391ft/s 11.7G 1,340ft 8.4s 6s
OK Cesaroni H123 37.0oz 74ft/s 441ft/s 12.5G 1,357ft 8.2s 7s
OK Cesaroni H54 36.4oz 63ft/s 317ft/s 9.0G 1,376ft 8.9s 5s
OK AeroTech H115 36.2oz 76ft/s 436ft/s 11.1G 1,385ft 8.3s 7s
OK Cesaroni H118 37.2oz 83ft/s 440ft/s 15.4G 1,434ft 8.3s 7s
OK AeroTech H97 38.8oz 66ft/s 416ft/s 9.1G 1,435ft 8.6s 6s
OK Cesaroni H237 39.4oz 106ft/s 543ft/s 23.6G 1,487ft 8.2s 7s
OK AeroTech H220 37.8oz 111ft/s 539ft/s 28.2G 1,505ft 8.2s 7s
OK AeroTech H210 37.7oz 104ft/s 546ft/s 22.9G 1,530ft 8.2s 7s
OK Cesaroni H151 37.4oz 95ft/s 500ft/s 18.6G 1,543ft 8.4s 7s
OK Cesaroni H170 37.2oz 99ft/s 535ft/s 22.0G 1,593ft 8.4s 7s
OK AeroTech H182 36.3oz 91ft/s 562ft/s 17.4G 1,593ft 8.4s 7s
OK Cesaroni H160 38.6oz 88ft/s 532ft/s 16.3G 1,604ft 8.5s 7s
OK KBA H130 54.0oz 75ft/s 413ft/s 13.6G 1,613ft 9.2s 7s
OK Cesaroni H135 37.9oz 84ft/s 501ft/s 14.7G 1,615ft 8.7s 7s
OK AeroTech H180 37.9oz 102ft/s 558ft/s 23.0G 1,630ft 8.4s 7s
OK AeroTech H250 38.0oz 117ft/s 594ft/s 29.5G 1,635ft 8.3s 7s
OK AeroTech H195 35.9oz 112ft/s 604ft/s 24.4G 1,690ft 8.4s 7s
OK KBA H225 40.1oz 90ft/s 600ft/s 22.0G 1,694ft 8.6s 7s
OK Cesaroni H295 41.1oz 116ft/s 637ft/s 29.8G 1,700ft 8.5s 8s
OK AeroTech H135 36.5oz 79ft/s 500ft/s 14.1G 1,722ft 8.9s 7s
OK Cesaroni H194 39.0oz 105ft/s 594ft/s 25.0G 1,782ft 8.7s 7s
OK Cesaroni H180 40.1oz 99ft/s 582ft/s 23.3G 1,787ft 8.7s 7s
OK Cesaroni H200 38.7oz 103ft/s 603ft/s 26.0G 1,808ft 8.7s 7s
OK Cesaroni H53 39.1oz 55ft/s 375ft/s 7.6G 1,832ft 10.2s 6s
OK Cesaroni H399 39.4oz 148ft/s 734ft/s 48.9G 1,836ft 8.5s 8s
OK Cesaroni H255 37.2oz 122ft/s 674ft/s 35.4G 1,842ft 8.6s 7s
OK Cesaroni H140 38.8oz 99ft/s 555ft/s 21.8G 1,898ft 9.0s 7s
OK AeroTech H268 41.6oz 120ft/s 691ft/s 27.4G 1,986ft 8.9s 8s
OK Cesaroni H233 40.6oz 112ft/s 683ft/s 29.2G 2,017ft 8.9s 8s
OK Cesaroni H159 41.1oz 90ft/s 599ft/s 15.3G 2,023ft 9.3s 7s
OK Cesaroni H255 40.2oz 127ft/s 713ft/s 36.0G 2,030ft 8.9s 8s
OK Cesaroni H160 40.3oz 108ft/s 607ft/s 27.3G 2,095ft 9.3s 7s
OK AeroTech I200 41.6oz 110ft/s 653ft/s 25.2G 2,097ft 9.2s 7s
OK Cesaroni I204 41.3oz 111ft/s 686ft/s 30.2G 2,185ft 9.3s 8s
OK AeroTech I205 40.1oz 106ft/s 701ft/s 31.6G 2,187ft 9.2s 7s
warningsW,D Estes G80 33.4oz 8:1 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 (27ft/s)
failedG AeroTech E23 speed at end of launch guide too slow (39ft/s)
failedG AeroTech E16 speed at end of launch guide too slow (32ft/s)
failedG AeroTech F23 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (42ft/s)
failedG AeroTech F27 speed at end of launch guide too slow (39ft/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 (43ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (43ft/s)
failedG AeroTech F20 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni F32 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni F29 speed at end of launch guide too slow (36ft/s)
failedG Cesaroni F31 speed at end of launch guide too slow (40ft/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 (38ft/s)
failedG AeroTech F22 speed at end of launch guide too slow (33ft/s)
failedG Apogee F10 speed at end of launch guide too slow (28ft/s)
failedG AeroTech G38 speed at end of launch guide too slow (47ft/s)
failedG AeroTech G25 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni G33 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni H42 speed at end of launch guide too slow (46ft/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.

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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