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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 133 motors that fit and appear to have enough thrust (656 motors didn't fit, 22 motors failed safety checks). 155 motor had thrust curves available and 320 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:   Der Fiber Max
Owner: Phill Ash
Body Diameter: 4.00in
Dry Weight: 68.4oz
MMT Diameter: 38.0mm
MMT Length: 20.00in
CD: 0.85

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 Contrail G130 86.6oz 62ft/s 109ft/s 21.3G 229ft 4.0s 3s
OK Contrail G234 87.6oz 102ft/s 139ft/s 21.3G 305ft 4.4s 4s
OK AeroTech G339 74.8oz 94ft/s 162ft/s 17.1G 356ft 4.7s 4s
OK Loki G94 76.9oz 51ft/s 140ft/s 5.2G 366ft 5.2s 4s
OK Contrail G123 86.4oz 62ft/s 151ft/s 13.8G 404ft 5.2s 4s
OK Contrail G100 86.4oz 57ft/s 147ft/s 6.6G 417ft 5.4s 4s
OK Cesaroni G185 75.0oz 64ft/s 173ft/s 8.8G 420ft 5.2s 5s
OK Cesaroni G115 75.3oz 49ft/s 172ft/s 5.3G 472ft 5.8s 5s
OK Contrail H300 90.0oz 102ft/s 186ft/s 27.6G 500ft 5.5s 5s
OK Contrail H222 86.7oz 88ft/s 185ft/s 27.1G 505ft 5.6s 5s
OK Contrail H303 89.2oz 111ft/s 199ft/s 30.4G 553ft 5.8s 5s
OK Loki H100 80.2oz 51ft/s 214ft/s 5.5G 753ft 7.1s 5s
OK Contrail H246 89.5oz 92ft/s 248ft/s 20.4G 801ft 6.8s 6s
warningsW AeroTech H283 77.1oz 84ft/s 268ft/s 14.6G 807ft 6.8s 6s
OK AeroTech H148 79.3oz 62ft/s 249ft/s 7.8G 849ft 7.3s 6s
OK AeroTech H130 76.8oz 73ft/s 243ft/s 11.1G 864ft 7.3s 6s
OK Contrail H141 90.0oz 69ft/s 247ft/s 9.6G 888ft 7.4s 6s
OK AeroTech H669 77.3oz 131ft/s 318ft/s 50.5G 924ft 7.0s 7s
OK AeroTech H100 77.6oz 48ft/s 240ft/s 5.0G 926ft 7.9s 6s
OK AeroTech H123 78.1oz 53ft/s 238ft/s 5.8G 927ft 7.9s 5s
OK Loki H90 80.2oz 52ft/s 232ft/s 5.6G 944ft 8.0s 5s
OK Cesaroni H123 78.9oz 48ft/s 269ft/s 5.7G 958ft 7.9s 6s
OK Loki H144 80.3oz 71ft/s 269ft/s 10.1G 980ft 7.7s 6s
OK Loki H125 80.5oz 62ft/s 257ft/s 8.2G 983ft 7.9s 6s
OK Cesaroni H143 80.6oz 51ft/s 279ft/s 6.1G 983ft 8.0s 6s
OK AeroTech H219 77.6oz 80ft/s 300ft/s 12.6G 989ft 7.5s 6s
OK AeroTech H242 77.7oz 70ft/s 302ft/s 10.0G 1,040ft 7.8s 6s
OK Loki H160 80.2oz 77ft/s 293ft/s 11.9G 1,066ft 7.8s 6s
OK Cesaroni H400 78.4oz 94ft/s 351ft/s 19.2G 1,090ft 7.7s 7s
OK Cesaroni H120 78.8oz 52ft/s 287ft/s 5.7G 1,101ft 8.4s 6s
OK Cesaroni H125 78.7oz 51ft/s 300ft/s 5.8G 1,133ft 8.5s 6s
OK Cesaroni H152 78.9oz 60ft/s 319ft/s 8.7G 1,199ft 8.5s 7s
OK Cesaroni H225 75.2oz 74ft/s 359ft/s 11.3G 1,212ft 8.2s 7s
OK AeroTech H178 79.8oz 57ft/s 337ft/s 8.5G 1,218ft 8.5s 7s
OK AeroTech H550 79.8oz 120ft/s 426ft/s 28.2G 1,348ft 8.2s 8s
OK AeroTech H550 79.5oz 120ft/s 430ft/s 28.4G 1,349ft 8.2s 8s
OK AeroTech I218 81.5oz 76ft/s 370ft/s 11.6G 1,360ft 8.7s 7s
warningsW Cesaroni H565 81.2oz 113ft/s 434ft/s 26.4G 1,364ft 8.3s 8s
OK AeroTech H999 80.1oz 155ft/s 452ft/s 71.2G 1,371ft 8.2s 8s
OK AeroTech H170 80.0oz 62ft/s 355ft/s 8.0G 1,377ft 8.9s 7s
OK AeroTech I180 82.0oz 88ft/s 347ft/s 14.9G 1,400ft 8.7s 7s
OK AeroTech I161 81.3oz 64ft/s 352ft/s 8.6G 1,433ft 9.1s 7s
OK AeroTech I175 80.7oz 72ft/s 355ft/s 10.2G 1,445ft 9.1s 7s
OK Cesaroni I180 82.3oz 59ft/s 380ft/s 7.9G 1,451ft 9.1s 7s
OK AeroTech I140 81.0oz 58ft/s 342ft/s 6.9G 1,475ft 9.4s 7s
OK AeroTech I245 81.3oz 89ft/s 401ft/s 17.2G 1,506ft 8.9s 7s
OK AeroTech I225 85.5oz 65ft/s 394ft/s 10.3G 1,512ft 9.1s 7s
OK AeroTech I357 80.5oz 87ft/s 420ft/s 16.0G 1,515ft 8.9s 7s
OK Cesaroni I212 85.2oz 64ft/s 407ft/s 9.3G 1,537ft 9.2s 8s
OK Cesaroni I566 82.0oz 108ft/s 494ft/s 25.9G 1,573ft 8.7s 8s
OK AeroTech I154 85.8oz 52ft/s 345ft/s 6.0G 1,630ft 10.1s 7s
OK Cesaroni I195 83.1oz 66ft/s 423ft/s 9.2G 1,701ft 9.7s 8s
OK Cesaroni I345 82.3oz 87ft/s 486ft/s 16.0G 1,702ft 9.2s 8s
OK Cesaroni I800 84.5oz 128ft/s 552ft/s 35.6G 1,721ft 9.0s 8s
OK AeroTech I285 85.8oz 84ft/s 465ft/s 14.8G 1,733ft 9.4s 8s
OK AeroTech I1299 83.3oz 176ft/s 579ft/s 64.3G 1,749ft 8.9s 9s
OK Cesaroni I170 82.2oz 64ft/s 433ft/s 8.8G 1,752ft 9.8s 7s
OK Cesaroni I175 83.8oz 60ft/s 423ft/s 7.1G 1,765ft 9.9s 7s
OK Cesaroni I236 82.5oz 76ft/s 458ft/s 12.6G 1,779ft 9.7s 8s
OK AeroTech I305 88.9oz 87ft/s 476ft/s 15.5G 1,809ft 9.5s 8s
OK Cesaroni I223 85.8oz 67ft/s 465ft/s 9.6G 1,831ft 9.8s 8s
OK AeroTech I211 84.4oz 77ft/s 443ft/s 12.6G 1,832ft 9.8s 7s
OK AeroTech I300 84.0oz 91ft/s 487ft/s 19.0G 1,835ft 9.5s 8s
OK AeroTech I195 88.6oz 81ft/s 440ft/s 13.7G 1,849ft 9.8s 8s
OK Loki I316 87.4oz 102ft/s 503ft/s 19.6G 1,943ft 9.7s 8s
OK Cesaroni I287 89.7oz 75ft/s 521ft/s 12.3G 1,994ft 10.0s 8s
OK Loki I405 87.6oz 121ft/s 550ft/s 32.0G 2,014ft 9.6s 8s
OK Loki I210 87.4oz 87ft/s 472ft/s 17.2G 2,042ft 10.1s 8s
warningsW Loki I110 89.2oz 56ft/s 391ft/s 9.7G 2,047ft 10.9s 7s
OK Cesaroni I285 86.2oz 79ft/s 536ft/s 13.7G 2,100ft 10.2s 8s
OK Loki I430 87.4oz 94ft/s 598ft/s 20.9G 2,115ft 9.9s 9s
OK Loki I377 88.2oz 109ft/s 553ft/s 25.8G 2,116ft 9.9s 9s
OK Cesaroni I255 86.6oz 75ft/s 529ft/s 12.1G 2,135ft 10.3s 8s
OK AeroTech I366 88.0oz 98ft/s 576ft/s 19.0G 2,157ft 10.0s 9s
OK AeroTech I327 90.6oz 88ft/s 569ft/s 16.2G 2,161ft 10.1s 8s
OK Cesaroni I470 85.9oz 102ft/s 628ft/s 22.3G 2,163ft 9.9s 9s
OK AeroTech I364 92.3oz 85ft/s 562ft/s 14.9G 2,174ft 10.2s 9s
OK AMW I297 89.2oz 83ft/s 560ft/s 14.1G 2,176ft 10.2s 8s
OK Cesaroni I303 86.0oz 84ft/s 567ft/s 16.3G 2,203ft 10.2s 8s
OK AeroTech I59 85.6oz 53ft/s 266ft/s 6.0G 2,208ft 13.1s 5s
OK AeroTech I280 90.1oz 78ft/s 563ft/s 12.5G 2,240ft 10.4s 8s
OK AeroTech I435 86.7oz 118ft/s 631ft/s 30.4G 2,257ft 10.0s 9s
OK Cesaroni I242 87.8oz 74ft/s 540ft/s 10.7G 2,257ft 10.6s 8s
OK KBA I550 93.5oz 103ft/s 655ft/s 23.2G 2,278ft 10.2s 9s
OK Cesaroni I350 96.0oz 83ft/s 598ft/s 14.0G 2,318ft 10.5s 9s
OK KBA I301 94.0oz 76ft/s 568ft/s 14.4G 2,319ft 10.6s 9s
OK AeroTech I284 88.0oz 96ft/s 593ft/s 18.7G 2,329ft 10.3s 8s
OK Cesaroni I125 91.2oz 61ft/s 418ft/s 9.6G 2,395ft 11.7s 7s
OK AeroTech I500 88.7oz 105ft/s 683ft/s 22.4G 2,398ft 10.2s 9s
warningsW Cesaroni I540 89.5oz 114ft/s 709ft/s 24.3G 2,418ft 10.2s 9s
OK AeroTech I600 89.6oz 129ft/s 704ft/s 31.9G 2,424ft 10.2s 9s
OK KBA J520 93.9oz 105ft/s 686ft/s 26.3G 2,446ft 10.5s 9s
OK KBA J740 93.9oz 128ft/s 753ft/s 34.3G 2,465ft 10.3s 9s
OK Loki J396 94.9oz 88ft/s 653ft/s 18.8G 2,470ft 10.6s 9s
OK AeroTech I350 90.1oz 91ft/s 670ft/s 18.2G 2,479ft 10.5s 9s
OK AeroTech J420 91.3oz 100ft/s 664ft/s 21.0G 2,480ft 10.5s 9s
OK AeroTech J350 91.9oz 117ft/s 666ft/s 31.2G 2,488ft 10.4s 9s
OK Cesaroni J381 92.7oz 97ft/s 657ft/s 18.6G 2,504ft 10.6s 9s
OK AeroTech J340 88.8oz 98ft/s 651ft/s 23.4G 2,512ft 10.5s 8s
OK Cesaroni J335 90.5oz 90ft/s 640ft/s 15.4G 2,513ft 10.7s 9s
OK Cesaroni J357 89.6oz 92ft/s 664ft/s 19.7G 2,539ft 10.6s 9s
OK AeroTech J520 95.1oz 125ft/s 675ft/s 33.0G 2,539ft 10.5s 9s
OK Cesaroni J285 89.4oz 81ft/s 619ft/s 13.5G 2,549ft 10.9s 9s
OK Cesaroni I216 89.6oz 74ft/s 557ft/s 12.6G 2,560ft 11.2s 8s
OK Cesaroni J270 91.5oz 72ft/s 609ft/s 10.5G 2,570ft 11.1s 9s
OK Cesaroni J316 89.8oz 88ft/s 627ft/s 16.5G 2,571ft 10.9s 9s
OK AeroTech J425 90.7oz 86ft/s 711ft/s 16.4G 2,579ft 10.7s 9s
OK Cesaroni J400 93.2oz 92ft/s 688ft/s 17.1G 2,625ft 10.8s 9s
OK Loki J474 95.1oz 127ft/s 667ft/s 44.3G 2,629ft 10.6s 9s
OK Cesaroni J290 91.7oz 85ft/s 632ft/s 14.4G 2,649ft 11.1s 9s
OK AeroTech J500 91.5oz 118ft/s 736ft/s 30.1G 2,664ft 10.6s 9s
OK Loki J528 94.7oz 122ft/s 769ft/s 37.8G 2,683ft 10.5s 9s
OK AeroTech J270 91.0oz 80ft/s 633ft/s 13.1G 2,712ft 11.2s 9s
OK AeroTech J575 100.6oz 125ft/s 779ft/s 30.3G 2,732ft 10.6s 9s
OK Cesaroni J94 91.7oz 48ft/s 393ft/s 5.4G 2,779ft 13.5s 7s
OK Loki J326 95.4oz 108ft/s 628ft/s 35.7G 2,806ft 11.2s 9s
OK Loki J712 94.9oz 125ft/s 836ft/s 32.3G 2,821ft 10.7s 10s
OK AeroTech J435 90.4oz 108ft/s 760ft/s 26.4G 2,824ft 10.8s 9s
OK Cesaroni J410 94.3oz 97ft/s 733ft/s 18.5G 2,837ft 11.0s 9s
OK Cesaroni J425 93.1oz 104ft/s 746ft/s 24.9G 2,846ft 10.9s 9s
OK Cesaroni J330 93.2oz 90ft/s 695ft/s 16.8G 2,853ft 11.2s 9s
OK Cesaroni J520 98.4oz 102ft/s 806ft/s 22.9G 2,942ft 11.1s 9s
OK Cesaroni J354 95.8oz 93ft/s 706ft/s 18.6G 2,982ft 11.3s 9s
OK Cesaroni J580 105.2oz 102ft/s 822ft/s 21.9G 3,022ft 11.2s 10s
OK AeroTech J825 99.3oz 144ft/s 963ft/s 41.7G 3,122ft 10.9s 10s
OK Cesaroni J595 98.9oz 115ft/s 884ft/s 32.1G 3,252ft 11.3s 10s
OK Cesaroni J600 100.4oz 115ft/s 916ft/s 25.0G 3,262ft 11.3s 10s
OK Cesaroni J394 101.5oz 88ft/s 807ft/s 14.7G 3,336ft 11.8s 9s
OK AeroTech J570 100.2oz 142ft/s 849ft/s 40.4G 3,365ft 11.4s 9s
OK Cesaroni J453 102.4oz 104ft/s 829ft/s 24.6G 3,385ft 11.7s 9s
OK Cesaroni J420 99.2oz 110ft/s 823ft/s 27.4G 3,408ft 11.7s 9s
OK Cesaroni J530 102.9oz 118ft/s 912ft/s 27.2G 3,551ft 11.7s 10s
OK Cesaroni J150 101.9oz 64ft/s 534ft/s 10.5G 3,678ft 14.0s 8s

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 (41ft/s)
failedG Loki G69 speed at end of launch guide too slow (42ft/s)
failedG AeroTech G61 speed at end of launch guide too slow (38ft/s)
failedG Loki G70 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni G69 speed at end of launch guide too slow (37ft/s)
failedG Loki G80 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni G46 speed at end of launch guide too slow (31ft/s)
failedG Cesaroni G79 speed at end of launch guide too slow (37ft/s)
failedG Loki G66 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni G60 speed at end of launch guide too slow (39ft/s)
failedG AeroTech G69 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (31ft/s)
failedG Cesaroni G78 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (28ft/s)
failedA Contrail G300 rocket doesn't reach a safe altitude (233ft)
failedG AeroTech H73 speed at end of launch guide too slow (36ft/s)
failedG AeroTech H112 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni H110 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni H100 speed at end of launch guide too slow (46ft/s)
failedG AeroTech H45 speed at end of launch guide too slow (38ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (28ft/s)
failedG Cesaroni I55 speed at end of launch guide too slow (31ft/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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