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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 148 motors that fit and appear to have enough thrust (653 motors didn't fit, 10 motors failed safety checks). 158 motor had thrust curves available and 325 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:   Shredder Jr.
Owner: Erik Czerwin
Body Diameter: 2.24in
Dry Weight: 46.0oz
MMT Diameter: 38.0mm
MMT Length: 24.00in
CD: 0.55

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 G300 65.2oz 136ft/s 171ft/s 44.0G 452ft 5.3s 5s
OK Contrail G130 64.2oz 76ft/s 159ft/s 29.0G 458ft 5.5s 5s
OK Contrail G234 65.2oz 119ft/s 195ft/s 29.1G 610ft 6.2s 6s
OK Loki G69 54.5oz 52ft/s 186ft/s 5.5G 663ft 6.9s 5s
OK AeroTech G61 52.8oz 48ft/s 183ft/s 4.6G 676ft 7.2s 5s
OK AeroTech G67 53.1oz 50ft/s 193ft/s 5.2G 686ft 7.2s 6s
OK Loki G70 54.5oz 54ft/s 197ft/s 5.7G 748ft 7.4s 6s
OK Loki G80 55.0oz 57ft/s 206ft/s 6.4G 775ft 7.4s 6s
OK AeroTech G339 52.4oz 112ft/s 238ft/s 25.0G 807ft 7.1s 7s
OK Loki G94 54.5oz 62ft/s 219ft/s 7.7G 834ft 7.6s 6s
OK Contrail G123 64.0oz 74ft/s 221ft/s 19.0G 840ft 7.5s 6s
OK Contrail G100 64.0oz 68ft/s 220ft/s 9.3G 873ft 7.7s 6s
OK Loki G66 54.8oz 57ft/s 220ft/s 6.6G 944ft 8.3s 6s
OK Cesaroni G185 52.6oz 77ft/s 261ft/s 13.2G 974ft 7.9s 7s
OK Cesaroni G60 53.3oz 49ft/s 235ft/s 4.8G 1,011ft 8.7s 6s
OK Contrail H300 67.6oz 130ft/s 260ft/s 37.2G 1,020ft 7.9s 7s
OK Contrail H222 64.3oz 105ft/s 262ft/s 36.9G 1,050ft 8.1s 7s
OK Cesaroni G78 52.9oz 49ft/s 252ft/s 7.9G 1,087ft 8.8s 7s
OK Cesaroni G115 52.9oz 61ft/s 270ft/s 7.9G 1,111ft 8.6s 7s
OK Contrail H303 66.8oz 138ft/s 279ft/s 41.0G 1,149ft 8.4s 8s
OK Contrail H211 67.2oz 117ft/s 324ft/s 32.8G 1,548ft 9.7s 9s
OK Contrail H246 67.1oz 112ft/s 353ft/s 27.5G 1,739ft 10.2s 9s
OK Contrail H121 67.6oz 71ft/s 329ft/s 13.1G 1,739ft 10.7s 9s
OK Loki H100 57.8oz 60ft/s 336ft/s 8.4G 1,759ft 10.7s 9s
warningsW AeroTech H283 54.7oz 102ft/s 401ft/s 21.2G 1,939ft 10.7s 10s
OK Contrail H141 67.6oz 83ft/s 361ft/s 13.1G 1,949ft 11.1s 9s
OK AeroTech H148 56.9oz 75ft/s 387ft/s 11.3G 2,024ft 11.2s 10s
OK AeroTech H130 54.4oz 92ft/s 387ft/s 16.2G 2,085ft 11.2s 10s
OK AeroTech H123 55.7oz 64ft/s 387ft/s 8.6G 2,243ft 12.0s 10s
OK Loki H90 57.8oz 62ft/s 379ft/s 8.1G 2,249ft 12.2s 10s
OK AeroTech H100 55.2oz 58ft/s 394ft/s 7.6G 2,256ft 12.1s 10s
OK AeroTech H669 54.9oz 156ft/s 462ft/s 71.6G 2,261ft 11.2s 11s
OK Cesaroni H123 56.5oz 58ft/s 422ft/s 8.7G 2,326ft 12.2s 10s
OK Loki H144 57.9oz 83ft/s 419ft/s 14.5G 2,341ft 11.9s 10s
OK Loki H125 58.1oz 76ft/s 407ft/s 11.7G 2,343ft 12.1s 10s
OK Cesaroni H143 58.2oz 61ft/s 434ft/s 9.4G 2,382ft 12.2s 11s
OK AeroTech H219 55.2oz 93ft/s 457ft/s 18.1G 2,421ft 11.9s 11s
OK AeroTech H242 55.3oz 84ft/s 466ft/s 14.6G 2,558ft 12.2s 11s
OK AeroTech H112 59.4oz 52ft/s 408ft/s 5.8G 2,562ft 13.2s 10s
OK Loki H160 57.8oz 94ft/s 453ft/s 17.0G 2,573ft 12.3s 11s
OK Cesaroni H120 56.4oz 62ft/s 461ft/s 8.5G 2,707ft 13.0s 11s
OK Cesaroni H400 56.0oz 113ft/s 519ft/s 28.0G 2,713ft 12.3s 12s
OK Cesaroni H110 57.5oz 56ft/s 455ft/s 6.9G 2,752ft 13.3s 11s
OK Cesaroni H125 56.3oz 61ft/s 478ft/s 8.9G 2,800ft 13.2s 11s
OK Cesaroni H152 56.5oz 71ft/s 504ft/s 12.5G 2,973ft 13.3s 11s
OK Cesaroni H100 57.5oz 57ft/s 475ft/s 6.4G 2,979ft 13.8s 11s
OK AeroTech H178 57.4oz 68ft/s 525ft/s 12.9G 3,031ft 13.3s 12s
OK Cesaroni H225 52.8oz 89ft/s 560ft/s 16.6G 3,098ft 13.2s 12s
OK AeroTech I218 59.1oz 90ft/s 571ft/s 16.5G 3,392ft 13.8s 12s
OK AeroTech H550 57.4oz 140ft/s 625ft/s 40.1G 3,434ft 13.5s 13s
OK AeroTech H170 57.6oz 76ft/s 564ft/s 12.0G 3,447ft 14.1s 12s
OK AeroTech H550 57.1oz 141ft/s 634ft/s 40.5G 3,454ft 13.5s 13s
OK AeroTech I180 59.6oz 105ft/s 549ft/s 20.9G 3,457ft 13.9s 12s
warningsW Cesaroni H565 58.8oz 131ft/s 632ft/s 40.3G 3,471ft 13.6s 13s
OK AeroTech H999 57.7oz 189ft/s 652ft/s 99.4G 3,518ft 13.5s 13s
OK AeroTech I161 58.9oz 77ft/s 565ft/s 12.5G 3,574ft 14.3s 12s
OK AeroTech I175 58.3oz 84ft/s 559ft/s 14.6G 3,578ft 14.4s 12s
OK Cesaroni I180 59.9oz 71ft/s 593ft/s 12.1G 3,633ft 14.4s 12s
OK AeroTech I140 58.6oz 68ft/s 564ft/s 10.1G 3,689ft 14.7s 12s
OK AeroTech I225 63.1oz 78ft/s 608ft/s 15.3G 3,762ft 14.5s 13s
OK AeroTech I245 58.9oz 110ft/s 626ft/s 24.5G 3,812ft 14.3s 13s
OK Cesaroni I212 62.8oz 76ft/s 629ft/s 14.2G 3,851ft 14.7s 13s
OK AeroTech I357 58.1oz 105ft/s 646ft/s 22.5G 3,859ft 14.3s 13s
OK AeroTech I154 63.4oz 63ft/s 572ft/s 8.6G 4,003ft 15.6s 12s
OK Cesaroni I566 59.6oz 129ft/s 724ft/s 38.5G 4,081ft 14.5s 14s
OK Cesaroni I195 60.7oz 77ft/s 675ft/s 13.1G 4,320ft 15.4s 13s
OK Cesaroni I345 59.9oz 102ft/s 738ft/s 22.4G 4,400ft 15.1s 14s
OK AeroTech I285 63.4oz 97ft/s 709ft/s 20.7G 4,407ft 15.3s 14s
OK Cesaroni I170 59.8oz 75ft/s 690ft/s 12.7G 4,469ft 15.7s 13s
OK Cesaroni I175 61.4oz 73ft/s 679ft/s 10.6G 4,469ft 15.8s 13s
OK Cesaroni I800 62.1oz 154ft/s 795ft/s 54.4G 4,509ft 15.0s 14s
OK Cesaroni I236 60.1oz 87ft/s 724ft/s 17.6G 4,573ft 15.6s 14s
OK AeroTech I305 66.5oz 99ft/s 724ft/s 21.8G 4,576ft 15.4s 14s
OK AeroTech I1299 60.9oz 205ft/s 827ft/s 91.5G 4,628ft 15.0s 15s
OK AeroTech I195 66.2oz 93ft/s 691ft/s 18.8G 4,631ft 15.8s 14s
OK AeroTech I211 62.0oz 91ft/s 706ft/s 17.7G 4,654ft 15.7s 13s
OK Cesaroni I223 63.4oz 79ft/s 728ft/s 13.9G 4,666ft 15.8s 14s
OK AeroTech I300 61.6oz 108ft/s 754ft/s 26.2G 4,722ft 15.6s 14s
OK Loki I316 65.0oz 114ft/s 773ft/s 27.1G 4,985ft 15.9s 14s
warningsW Loki I110 66.8oz 66ft/s 651ft/s 13.2G 5,059ft 17.0s 13s
OK Cesaroni I287 67.3oz 88ft/s 800ft/s 18.2G 5,108ft 16.3s 15s
OK Loki I210 65.0oz 100ft/s 749ft/s 23.5G 5,196ft 16.4s 14s
OK Loki I405 65.2oz 141ft/s 834ft/s 43.5G 5,240ft 16.0s 15s
OK AeroTech I59 63.2oz 63ft/s 469ft/s 8.7G 5,406ft 19.0s 10s
OK Cesaroni I285 63.8oz 93ft/s 847ft/s 18.9G 5,462ft 16.7s 15s
OK Loki I377 65.8oz 129ft/s 853ft/s 35.0G 5,505ft 16.5s 15s
OK Cesaroni I255 64.2oz 88ft/s 843ft/s 16.9G 5,535ft 16.8s 15s
OK Loki I430 65.0oz 113ft/s 901ft/s 28.4G 5,562ft 16.5s 15s
OK AeroTech I327 68.2oz 101ft/s 871ft/s 21.8G 5,589ft 16.7s 15s
OK AeroTech I364 69.9oz 97ft/s 867ft/s 21.3G 5,609ft 16.7s 15s
OK AMW I297 66.8oz 96ft/s 868ft/s 19.1G 5,631ft 16.8s 15s
OK AeroTech I366 65.6oz 112ft/s 894ft/s 25.9G 5,646ft 16.6s 15s
OK Cesaroni I470 63.5oz 121ft/s 952ft/s 30.6G 5,756ft 16.6s 15s
OK Cesaroni I303 63.6oz 98ft/s 893ft/s 22.4G 5,769ft 16.9s 15s
OK AeroTech I280 67.7oz 91ft/s 887ft/s 16.9G 5,806ft 17.1s 15s
OK Cesaroni I242 65.4oz 84ft/s 872ft/s 14.7G 5,837ft 17.3s 15s
OK Cesaroni I125 68.8oz 75ft/s 719ft/s 13.0G 5,945ft 18.2s 14s
OK KBA I301 71.6oz 92ft/s 871ft/s 19.5G 5,960ft 17.4s 15s
OK Cesaroni I350 73.6oz 96ft/s 908ft/s 19.1G 5,973ft 17.3s 16s
OK KBA I550 71.1oz 120ft/s 954ft/s 33.1G 5,994ft 17.1s 16s
OK AeroTech I435 64.3oz 140ft/s 967ft/s 41.4G 5,994ft 16.8s 15s
OK AeroTech I284 65.6oz 111ft/s 938ft/s 26.1G 6,108ft 17.1s 15s
OK AeroTech I500 66.3oz 116ft/s 1,038ft/s 30.7G 6,415ft 17.3s 16s
OK KBA J520 71.5oz 122ft/s 1,022ft/s 34.9G 6,485ft 17.6s 16s
OK Loki J396 72.5oz 99ft/s 995ft/s 27.2G 6,493ft 17.7s 16s
warningsW Cesaroni I540 67.1oz 133ft/s 1,073ft/s 33.9G 6,496ft 17.3s 16s
OK AeroTech I600 67.2oz 148ft/s 1,065ft/s 43.0G 6,502ft 17.3s 16s
OK AeroTech J350 69.5oz 135ft/s 1,027ft/s 41.7G 6,574ft 17.5s 16s
OK AeroTech J420 68.9oz 116ft/s 1,031ft/s 28.4G 6,582ft 17.6s 16s
OK Cesaroni J381 70.3oz 108ft/s 1,017ft/s 24.9G 6,583ft 17.7s 16s
OK AeroTech I350 67.7oz 110ft/s 1,048ft/s 25.8G 6,594ft 17.6s 16s
OK Cesaroni J335 68.1oz 102ft/s 1,009ft/s 20.9G 6,611ft 17.8s 16s
OK AeroTech J340 66.4oz 116ft/s 1,030ft/s 31.6G 6,613ft 17.5s 15s
OK Cesaroni I216 67.2oz 87ft/s 914ft/s 17.1G 6,613ft 18.1s 15s
OK KBA J740 71.5oz 146ft/s 1,084ft/s 49.6G 6,635ft 17.5s 17s
OK Cesaroni J270 69.1oz 84ft/s 987ft/s 15.2G 6,697ft 18.1s 16s
OK AeroTech J520 72.7oz 152ft/s 1,023ft/s 43.6G 6,704ft 17.7s 16s
OK Cesaroni J285 67.0oz 94ft/s 993ft/s 19.2G 6,705ft 18.0s 16s
OK Cesaroni J357 67.2oz 110ft/s 1,050ft/s 26.6G 6,735ft 17.8s 16s
OK Cesaroni J316 67.4oz 101ft/s 992ft/s 22.3G 6,763ft 18.1s 16s
OK Cesaroni J94 69.3oz 57ft/s 715ft/s 7.5G 6,836ft 20.2s 13s
OK AeroTech J425 68.3oz 103ft/s 1,110ft/s 23.8G 6,898ft 17.9s 16s
OK Cesaroni J290 69.3oz 98ft/s 1,021ft/s 19.4G 6,933ft 18.2s 16s
OK Loki J474 72.7oz 155ft/s 1,030ft/s 58.3G 6,940ft 17.9s 16s
OK Cesaroni J400 70.8oz 105ft/s 1,077ft/s 24.1G 6,961ft 18.0s 16s
OK AeroTech J270 68.6oz 93ft/s 1,032ft/s 17.8G 7,107ft 18.4s 16s
OK AeroTech J500 69.1oz 135ft/s 1,145ft/s 40.3G 7,164ft 17.9s 17s
OK Loki J528 72.3oz 149ft/s 1,151ft/s 49.9G 7,221ft 18.0s 17s
OK AeroTech J575 78.2oz 143ft/s 1,158ft/s 40.8G 7,273ft 18.0s 17s
OK Loki J326 73.0oz 125ft/s 1,011ft/s 47.1G 7,309ft 18.6s 16s
OK Cesaroni J410 71.9oz 110ft/s 1,158ft/s 24.6G 7,557ft 18.6s 17s
OK Cesaroni J330 70.8oz 107ft/s 1,112ft/s 22.4G 7,557ft 18.7s 16s
OK Cesaroni J425 70.7oz 122ft/s 1,175ft/s 33.1G 7,595ft 18.4s 16s
OK AeroTech J435 68.0oz 125ft/s 1,204ft/s 35.5G 7,610ft 18.3s 17s
OK Loki J712 72.5oz 140ft/s 1,245ft/s 42.6G 7,676ft 18.4s 17s
OK Cesaroni J354 73.4oz 109ft/s 1,147ft/s 24.5G 7,852ft 18.9s 16s
OK Cesaroni J520 76.0oz 117ft/s 1,237ft/s 30.1G 7,881ft 18.7s 17s
OK Cesaroni J580 82.8oz 115ft/s 1,240ft/s 31.1G 8,068ft 19.1s 17s
OK AeroTech J825 76.9oz 156ft/s 1,450ft/s 54.1G 8,606ft 19.0s 18s
OK Cesaroni J595 76.5oz 140ft/s 1,394ft/s 41.8G 8,830ft 19.3s 18s
OK Cesaroni J394 79.1oz 97ft/s 1,307ft/s 20.5G 8,844ft 19.8s 17s
OK Cesaroni J600 78.0oz 130ft/s 1,422ft/s 33.2G 8,854ft 19.3s 18s
OK Cesaroni J453 80.0oz 118ft/s 1,323ft/s 31.7G 9,005ft 19.7s 17s
OK AeroTech J570 77.8oz 154ft/s 1,349ft/s 52.4G 9,037ft 19.4s 17s
OK Cesaroni J420 76.8oz 125ft/s 1,311ft/s 35.8G 9,085ft 19.8s 17s
OK Cesaroni J150 79.5oz 75ft/s 949ft/s 13.7G 9,106ft 21.6s 15s
OK Cesaroni J530 80.5oz 131ft/s 1,441ft/s 35.2G 9,586ft 19.9s 18s
OK AeroTech J510 84.1oz 141ft/s 1,440ft/s 43.5G 9,801ft 20.1s 18s

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 Cesaroni G69 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni G46 speed at end of launch guide too slow (39ft/s)
failedG Cesaroni G79 speed at end of launch guide too slow (45ft/s)
failedG AeroTech G69 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (39ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (36ft/s)
failedG AeroTech H73 speed at end of launch guide too slow (45ft/s)
failedG AeroTech H45 speed at end of launch guide too slow (46ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (35ft/s)
failedG Cesaroni I55 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.)

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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