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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 135 motors that fit and appear to have enough thrust (656 motors didn't fit, 20 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:   Tank Girl 38mm
Owner: Jim Lane
Body Diameter: 4.00in
Dry Weight: 66.0oz
MMT Diameter: 38.0mm
MMT Length: 20.00in
CD: 0.80

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 84.2oz 64ft/s 113ft/s 21.9G 242ft 4.1s 3s
OK Contrail G300 85.2oz 109ft/s 128ft/s 33.4G 246ft 3.9s 4s
OK Contrail G234 85.2oz 105ft/s 143ft/s 22.0G 322ft 4.5s 4s
OK Loki G80 75.0oz 48ft/s 135ft/s 4.4G 364ft 5.2s 4s
OK AeroTech G339 72.4oz 95ft/s 167ft/s 17.7G 379ft 4.8s 4s
OK Loki G94 74.5oz 52ft/s 146ft/s 5.4G 389ft 5.3s 4s
OK Contrail G123 84.0oz 61ft/s 156ft/s 14.2G 427ft 5.4s 4s
OK Contrail G100 84.0oz 58ft/s 153ft/s 6.8G 441ft 5.5s 4s
OK Cesaroni G185 72.6oz 65ft/s 179ft/s 9.1G 446ft 5.4s 5s
OK Cesaroni G115 72.9oz 50ft/s 179ft/s 5.5G 502ft 5.9s 5s
OK Contrail H300 87.6oz 105ft/s 192ft/s 28.4G 526ft 5.6s 5s
OK Contrail H222 84.3oz 87ft/s 191ft/s 27.9G 533ft 5.7s 5s
OK Contrail H303 86.8oz 113ft/s 206ft/s 31.3G 582ft 5.9s 5s
OK Loki H100 77.8oz 51ft/s 222ft/s 5.7G 795ft 7.3s 5s
OK Contrail H246 87.1oz 95ft/s 256ft/s 21.0G 842ft 7.0s 6s
warningsW AeroTech H283 74.7oz 87ft/s 277ft/s 15.1G 851ft 7.0s 6s
OK AeroTech H148 76.9oz 63ft/s 259ft/s 8.0G 896ft 7.5s 6s
OK AeroTech H130 74.4oz 76ft/s 252ft/s 11.5G 911ft 7.4s 6s
OK Contrail H141 87.6oz 71ft/s 255ft/s 9.9G 933ft 7.6s 6s
OK AeroTech H669 74.9oz 135ft/s 329ft/s 52.2G 972ft 7.2s 7s
OK AeroTech H100 75.2oz 50ft/s 249ft/s 5.1G 977ft 8.1s 6s
OK AeroTech H123 75.7oz 53ft/s 247ft/s 6.1G 978ft 8.0s 6s
OK Loki H90 77.8oz 53ft/s 241ft/s 5.8G 996ft 8.2s 6s
OK Cesaroni H123 76.5oz 49ft/s 279ft/s 5.9G 1,010ft 8.1s 6s
OK Loki H144 77.9oz 73ft/s 279ft/s 10.5G 1,031ft 7.8s 6s
OK Loki H125 78.1oz 64ft/s 267ft/s 8.5G 1,035ft 8.0s 6s
OK Cesaroni H143 78.2oz 52ft/s 289ft/s 6.3G 1,036ft 8.2s 6s
OK AeroTech H219 75.2oz 79ft/s 311ft/s 13.0G 1,040ft 7.7s 7s
OK AeroTech H242 75.3oz 71ft/s 313ft/s 10.3G 1,094ft 8.0s 7s
OK Loki H160 77.8oz 79ft/s 303ft/s 12.3G 1,121ft 8.0s 7s
OK Cesaroni H400 76.0oz 97ft/s 363ft/s 19.9G 1,145ft 7.8s 7s
OK Cesaroni H120 76.4oz 52ft/s 298ft/s 6.0G 1,159ft 8.6s 6s
OK Cesaroni H125 76.3oz 51ft/s 311ft/s 6.0G 1,192ft 8.7s 7s
OK Cesaroni H152 76.5oz 60ft/s 330ft/s 9.0G 1,259ft 8.7s 7s
OK Cesaroni H225 72.8oz 77ft/s 372ft/s 11.7G 1,272ft 8.3s 7s
OK AeroTech H178 77.4oz 59ft/s 349ft/s 8.8G 1,279ft 8.7s 7s
OK AeroTech H550 77.4oz 123ft/s 440ft/s 29.1G 1,411ft 8.4s 8s
OK AeroTech H550 77.1oz 119ft/s 444ft/s 29.3G 1,412ft 8.4s 8s
OK AeroTech I218 79.1oz 77ft/s 383ft/s 12.0G 1,425ft 8.8s 7s
warningsW Cesaroni H565 78.8oz 116ft/s 448ft/s 27.3G 1,428ft 8.5s 8s
OK AeroTech H999 77.7oz 160ft/s 467ft/s 73.5G 1,434ft 8.3s 8s
OK AeroTech H170 77.6oz 62ft/s 368ft/s 8.3G 1,444ft 9.1s 7s
OK AeroTech I180 79.6oz 86ft/s 359ft/s 15.4G 1,466ft 8.9s 7s
OK AeroTech I161 78.9oz 66ft/s 364ft/s 8.9G 1,501ft 9.3s 7s
OK AeroTech I175 78.3oz 75ft/s 367ft/s 10.6G 1,514ft 9.3s 7s
OK Cesaroni I180 79.9oz 61ft/s 393ft/s 8.2G 1,520ft 9.3s 7s
OK AeroTech I140 78.6oz 60ft/s 354ft/s 7.2G 1,546ft 9.5s 7s
OK AeroTech I245 78.9oz 92ft/s 414ft/s 17.8G 1,576ft 9.0s 8s
OK AeroTech I225 83.1oz 66ft/s 407ft/s 10.7G 1,582ft 9.3s 8s
OK AeroTech I357 78.1oz 90ft/s 434ft/s 16.5G 1,584ft 9.0s 8s
OK Cesaroni I212 82.8oz 64ft/s 421ft/s 9.6G 1,608ft 9.5s 8s
OK Cesaroni I566 79.6oz 111ft/s 510ft/s 26.8G 1,644ft 8.9s 8s
OK AeroTech I154 83.4oz 53ft/s 357ft/s 6.2G 1,707ft 10.3s 7s
OK Cesaroni I345 79.9oz 90ft/s 502ft/s 16.6G 1,778ft 9.4s 8s
OK Cesaroni I195 80.7oz 68ft/s 438ft/s 9.5G 1,779ft 9.8s 8s
OK Cesaroni I800 82.1oz 132ft/s 570ft/s 36.7G 1,797ft 9.2s 9s
OK AeroTech I285 83.4oz 84ft/s 480ft/s 15.2G 1,810ft 9.6s 8s
OK AeroTech I1299 80.9oz 181ft/s 597ft/s 66.3G 1,825ft 9.1s 9s
OK Cesaroni I170 79.8oz 66ft/s 448ft/s 9.1G 1,831ft 10.0s 8s
OK Cesaroni I175 81.4oz 62ft/s 437ft/s 7.4G 1,845ft 10.1s 8s
OK Cesaroni I236 80.1oz 74ft/s 473ft/s 13.0G 1,858ft 9.8s 8s
OK AeroTech I305 86.5oz 84ft/s 491ft/s 15.9G 1,887ft 9.7s 8s
OK Cesaroni I223 83.4oz 67ft/s 480ft/s 9.9G 1,911ft 10.0s 8s
OK AeroTech I211 82.0oz 78ft/s 457ft/s 13.0G 1,912ft 9.9s 8s
OK AeroTech I300 81.6oz 93ft/s 503ft/s 19.5G 1,915ft 9.7s 8s
OK AeroTech I195 86.2oz 81ft/s 454ft/s 14.1G 1,929ft 10.0s 8s
OK Loki I316 85.0oz 99ft/s 519ft/s 20.2G 2,026ft 9.8s 8s
OK Cesaroni I287 87.3oz 76ft/s 537ft/s 12.7G 2,078ft 10.2s 8s
OK Loki I405 85.2oz 125ft/s 567ft/s 33.0G 2,099ft 9.8s 9s
OK Loki I210 85.0oz 89ft/s 487ft/s 17.7G 2,129ft 10.2s 8s
warningsW Loki I110 86.8oz 57ft/s 405ft/s 9.9G 2,137ft 11.1s 7s
OK Cesaroni I285 83.8oz 81ft/s 553ft/s 14.1G 2,188ft 10.4s 8s
OK Loki I430 85.0oz 97ft/s 617ft/s 21.5G 2,204ft 10.1s 9s
OK Loki I377 85.8oz 112ft/s 571ft/s 26.6G 2,204ft 10.1s 9s
OK Cesaroni I255 84.2oz 77ft/s 546ft/s 12.5G 2,225ft 10.5s 8s
OK AeroTech I366 85.6oz 98ft/s 594ft/s 19.5G 2,247ft 10.2s 9s
OK AeroTech I327 88.2oz 91ft/s 586ft/s 16.6G 2,250ft 10.3s 9s
OK Cesaroni I470 83.5oz 105ft/s 648ft/s 23.0G 2,253ft 10.1s 9s
OK AeroTech I364 89.9oz 88ft/s 580ft/s 15.4G 2,263ft 10.3s 9s
OK AMW I297 86.8oz 81ft/s 578ft/s 14.5G 2,266ft 10.4s 9s
OK Cesaroni I303 83.6oz 87ft/s 585ft/s 16.8G 2,295ft 10.4s 9s
OK AeroTech I59 83.2oz 53ft/s 276ft/s 6.2G 2,314ft 13.3s 5s
OK AeroTech I280 87.7oz 81ft/s 581ft/s 12.8G 2,333ft 10.6s 9s
OK AeroTech I435 84.3oz 122ft/s 651ft/s 31.3G 2,349ft 10.1s 9s
OK Cesaroni I242 85.4oz 73ft/s 558ft/s 11.0G 2,351ft 10.8s 8s
OK KBA I550 91.1oz 106ft/s 674ft/s 23.9G 2,372ft 10.4s 9s
OK Cesaroni I350 93.6oz 86ft/s 616ft/s 14.4G 2,412ft 10.7s 9s
OK KBA I301 91.6oz 78ft/s 585ft/s 14.8G 2,415ft 10.8s 9s
OK AeroTech I284 85.6oz 97ft/s 612ft/s 19.3G 2,424ft 10.5s 9s
OK AeroTech I500 86.3oz 101ft/s 704ft/s 23.0G 2,495ft 10.4s 9s
OK Cesaroni I125 88.8oz 63ft/s 432ft/s 9.8G 2,496ft 11.9s 7s
warningsW Cesaroni I540 87.1oz 109ft/s 731ft/s 25.0G 2,515ft 10.4s 9s
OK AeroTech I600 87.2oz 123ft/s 725ft/s 32.8G 2,521ft 10.4s 9s
OK KBA J520 91.5oz 101ft/s 706ft/s 27.0G 2,546ft 10.6s 9s
OK KBA J740 91.5oz 131ft/s 775ft/s 35.3G 2,565ft 10.4s 10s
OK Loki J396 92.5oz 86ft/s 673ft/s 19.4G 2,570ft 10.8s 9s
OK AeroTech I350 87.7oz 94ft/s 691ft/s 18.7G 2,579ft 10.7s 9s
OK AeroTech J420 88.9oz 101ft/s 684ft/s 21.6G 2,580ft 10.7s 9s
OK AeroTech J350 89.5oz 116ft/s 686ft/s 32.1G 2,587ft 10.6s 9s
OK Cesaroni J381 90.3oz 94ft/s 677ft/s 19.2G 2,604ft 10.8s 9s
OK AeroTech J340 86.4oz 100ft/s 671ft/s 24.0G 2,612ft 10.7s 9s
OK Cesaroni J335 88.1oz 88ft/s 660ft/s 15.8G 2,614ft 10.9s 9s
OK AeroTech J520 92.7oz 128ft/s 695ft/s 33.9G 2,640ft 10.7s 9s
OK Cesaroni J357 87.2oz 94ft/s 684ft/s 20.2G 2,641ft 10.8s 9s
OK Cesaroni J285 87.0oz 84ft/s 639ft/s 13.9G 2,652ft 11.1s 9s
OK Cesaroni I216 87.2oz 76ft/s 575ft/s 13.0G 2,664ft 11.3s 8s
OK Cesaroni J270 89.1oz 74ft/s 628ft/s 10.9G 2,674ft 11.3s 9s
OK Cesaroni J316 87.4oz 86ft/s 647ft/s 17.0G 2,675ft 11.1s 9s
OK AeroTech J425 88.3oz 89ft/s 733ft/s 16.9G 2,682ft 10.9s 9s
OK Cesaroni J400 90.8oz 95ft/s 709ft/s 17.6G 2,729ft 10.9s 9s
OK Loki J474 92.7oz 130ft/s 686ft/s 45.4G 2,733ft 10.8s 9s
OK Cesaroni J290 89.3oz 83ft/s 652ft/s 14.8G 2,754ft 11.2s 9s
OK AeroTech J500 89.1oz 121ft/s 758ft/s 31.0G 2,769ft 10.7s 9s
OK Loki J528 92.3oz 125ft/s 791ft/s 38.8G 2,788ft 10.7s 10s
OK AeroTech J270 88.6oz 83ft/s 653ft/s 13.5G 2,819ft 11.3s 9s
OK AeroTech J575 98.2oz 123ft/s 802ft/s 31.1G 2,837ft 10.8s 9s
OK Cesaroni J94 89.3oz 50ft/s 407ft/s 5.6G 2,897ft 13.6s 7s
OK Loki J326 93.0oz 111ft/s 647ft/s 36.7G 2,917ft 11.3s 9s
OK Loki J712 92.5oz 128ft/s 860ft/s 33.2G 2,932ft 10.9s 10s
OK AeroTech J435 88.0oz 112ft/s 784ft/s 27.2G 2,934ft 11.0s 9s
OK Cesaroni J410 91.9oz 97ft/s 755ft/s 19.0G 2,948ft 11.2s 9s
OK Cesaroni J425 90.7oz 107ft/s 769ft/s 25.6G 2,957ft 11.1s 9s
OK Cesaroni J330 90.8oz 93ft/s 717ft/s 17.3G 2,965ft 11.4s 9s
OK Cesaroni J520 96.0oz 105ft/s 829ft/s 23.6G 3,055ft 11.2s 9s
OK Cesaroni J354 93.4oz 95ft/s 727ft/s 19.1G 3,098ft 11.5s 9s
OK Cesaroni J580 102.8oz 105ft/s 845ft/s 22.4G 3,138ft 11.4s 10s
OK AeroTech J825 96.9oz 148ft/s 991ft/s 42.7G 3,241ft 11.1s 10s
OK Cesaroni J595 96.5oz 118ft/s 910ft/s 32.9G 3,375ft 11.5s 10s
OK Cesaroni J600 98.0oz 110ft/s 943ft/s 25.7G 3,385ft 11.5s 10s
OK Cesaroni J394 99.1oz 85ft/s 831ft/s 15.1G 3,462ft 12.0s 10s
OK AeroTech J570 97.8oz 145ft/s 874ft/s 41.4G 3,490ft 11.5s 10s
OK Cesaroni J453 100.0oz 107ft/s 853ft/s 25.2G 3,512ft 11.9s 10s
OK Cesaroni J420 96.8oz 113ft/s 847ft/s 28.1G 3,536ft 11.9s 9s
OK Cesaroni J530 100.5oz 121ft/s 939ft/s 27.9G 3,683ft 11.8s 10s
OK Cesaroni J150 99.5oz 64ft/s 551ft/s 10.7G 3,820ft 14.1s 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 (42ft/s)
failedG Loki G69 speed at end of launch guide too slow (44ft/s)
failedG AeroTech G61 speed at end of launch guide too slow (39ft/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 (38ft/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 (38ft/s)
failedG Loki G66 speed at end of launch guide too slow (48ft/s)
failedG Cesaroni G60 speed at end of launch guide too slow (40ft/s)
failedG AeroTech G69 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (32ft/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 (29ft/s)
failedG AeroTech H73 speed at end of launch guide too slow (37ft/s)
failedG AeroTech H112 speed at end of launch guide too slow (44ft/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 (47ft/s)
failedG AeroTech H45 speed at end of launch guide too slow (39ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (29ft/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.)

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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