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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 93 motors that fit and appear to have enough thrust (694 motors didn't fit, 15 motors failed safety checks). 108 motor had thrust curves available and 233 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:   LOC Expediter 4inch-38mmt Pk-72
Owner: Kenneth B Weaver
Body Diameter: 4.00in
Dry Weight: 40.0oz
MMT Diameter: 38.0mm
MMT Length: 14.25in
CD: 0.75

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 Loki G69 48.5oz 48ft/s 197ft/s 6.3G 597ft 6.2s 5s
OK AeroTech G339 46.4oz 104ft/s 264ft/s 28.2G 648ft 5.9s 6s
OK Loki G70 48.5oz 50ft/s 206ft/s 6.5G 652ft 6.5s 5s
OK Loki G80 49.0oz 54ft/s 217ft/s 7.2G 663ft 6.4s 5s
OK Loki G94 48.5oz 57ft/s 231ft/s 8.7G 693ft 6.5s 5s
OK Cesaroni G185 46.6oz 69ft/s 285ft/s 14.6G 747ft 6.4s 6s
OK Loki G66 48.8oz 54ft/s 225ft/s 7.5G 771ft 7.0s 5s
OK Cesaroni G115 46.9oz 56ft/s 284ft/s 9.1G 837ft 7.0s 6s
warningsW AeroTech H283 48.7oz 93ft/s 418ft/s 23.5G 1,159ft 7.5s 7s
OK Loki H100 51.8oz 55ft/s 329ft/s 8.6G 1,159ft 8.0s 6s
OK AeroTech H148 50.9oz 68ft/s 379ft/s 12.6G 1,241ft 8.0s 7s
OK AeroTech H669 48.9oz 146ft/s 501ft/s 80.5G 1,245ft 7.5s 7s
OK AeroTech H130 48.4oz 81ft/s 368ft/s 18.3G 1,246ft 7.8s 6s
OK AeroTech H219 49.2oz 87ft/s 460ft/s 20.5G 1,340ft 7.9s 7s
OK AeroTech H123 49.7oz 59ft/s 358ft/s 9.7G 1,352ft 8.5s 6s
OK AeroTech H100 49.2oz 54ft/s 361ft/s 8.2G 1,358ft 8.6s 6s
OK Loki H144 51.9oz 78ft/s 399ft/s 16.2G 1,365ft 8.2s 7s
OK Cesaroni H123 50.5oz 53ft/s 409ft/s 9.3G 1,373ft 8.5s 7s
OK Cesaroni H143 52.2oz 55ft/s 420ft/s 9.5G 1,386ft 8.5s 7s
OK Loki H125 52.1oz 70ft/s 380ft/s 13.2G 1,389ft 8.4s 6s
OK Loki H90 51.8oz 59ft/s 345ft/s 9.2G 1,389ft 8.7s 6s
OK AeroTech H242 49.3oz 77ft/s 455ft/s 16.2G 1,410ft 8.2s 7s
OK Cesaroni H400 50.0oz 98ft/s 543ft/s 30.3G 1,414ft 7.9s 7s
OK Loki H160 51.8oz 82ft/s 431ft/s 19.0G 1,438ft 8.2s 7s
OK Cesaroni H120 50.4oz 56ft/s 424ft/s 9.5G 1,520ft 8.8s 7s
OK Cesaroni H225 46.8oz 83ft/s 543ft/s 18.8G 1,544ft 8.2s 7s
OK Cesaroni H125 50.3oz 55ft/s 445ft/s 9.3G 1,545ft 8.9s 7s
OK Cesaroni H110 51.5oz 50ft/s 415ft/s 7.3G 1,564ft 9.1s 6s
OK AeroTech H178 51.4oz 63ft/s 499ft/s 12.9G 1,584ft 8.7s 7s
OK Cesaroni H152 50.5oz 65ft/s 468ft/s 14.1G 1,587ft 8.7s 7s
OK AeroTech H550 51.1oz 133ft/s 651ft/s 44.7G 1,613ft 8.1s 8s
OK AeroTech H550 51.4oz 132ft/s 643ft/s 44.2G 1,625ft 8.2s 8s
OK AeroTech H999 51.7oz 171ft/s 693ft/s 111.1G 1,625ft 8.1s 8s
warningsW Cesaroni H565 52.8oz 124ft/s 656ft/s 41.3G 1,640ft 8.3s 8s
OK Cesaroni H100 51.5oz 53ft/s 415ft/s 7.3G 1,663ft 9.5s 7s
OK AeroTech I218 53.1oz 83ft/s 532ft/s 18.3G 1,700ft 8.7s 7s
OK AeroTech H170 51.6oz 70ft/s 507ft/s 12.9G 1,742ft 9.0s 7s
OK AeroTech I180 53.6oz 94ft/s 488ft/s 23.3G 1,749ft 8.8s 7s
OK AeroTech I161 52.9oz 70ft/s 496ft/s 13.7G 1,800ft 9.1s 7s
OK Cesaroni I180 53.9oz 62ft/s 544ft/s 12.1G 1,808ft 9.2s 7s
OK AeroTech I245 52.9oz 97ft/s 561ft/s 26.8G 1,810ft 8.7s 7s
OK AeroTech I357 52.1oz 96ft/s 602ft/s 25.2G 1,812ft 8.7s 7s
OK Cesaroni I566 53.6oz 113ft/s 736ft/s 39.6G 1,820ft 8.5s 8s
OK AeroTech I225 57.1oz 70ft/s 553ft/s 15.5G 1,842ft 9.1s 7s
OK AeroTech I140 52.6oz 62ft/s 472ft/s 11.1G 1,867ft 9.4s 7s
OK Cesaroni I212 56.8oz 69ft/s 573ft/s 13.7G 1,873ft 9.2s 7s
OK AeroTech I1299 54.9oz 186ft/s 867ft/s 97.5G 1,932ft 8.5s 8s
OK Cesaroni I800 56.1oz 136ft/s 818ft/s 53.3G 1,932ft 8.6s 8s
OK Cesaroni I345 53.9oz 98ft/s 693ft/s 25.0G 1,974ft 9.0s 8s
OK AeroTech I285 57.4oz 87ft/s 643ft/s 22.5G 2,023ft 9.2s 8s
OK Cesaroni I195 54.7oz 68ft/s 581ft/s 14.5G 2,040ft 9.5s 7s
OK AeroTech I154 57.4oz 57ft/s 466ft/s 9.5G 2,060ft 10.1s 7s
OK AeroTech I305 60.5oz 89ft/s 651ft/s 23.1G 2,072ft 9.2s 8s
OK Cesaroni I236 54.1oz 81ft/s 634ft/s 19.7G 2,080ft 9.4s 8s
OK Cesaroni I170 53.8oz 69ft/s 596ft/s 14.0G 2,092ft 9.6s 7s
OK AeroTech I300 55.6oz 101ft/s 670ft/s 29.2G 2,105ft 9.2s 8s
OK Cesaroni I175 55.4oz 67ft/s 577ft/s 11.2G 2,118ft 9.7s 7s
OK Cesaroni I223 57.4oz 70ft/s 636ft/s 14.9G 2,137ft 9.6s 8s
OK AeroTech I211 56.0oz 83ft/s 596ft/s 19.5G 2,139ft 9.5s 7s
OK AeroTech I195 60.2oz 83ft/s 590ft/s 20.6G 2,162ft 9.6s 7s
OK Loki I316 59.0oz 107ft/s 682ft/s 29.2G 2,202ft 9.3s 8s
OK Loki I405 59.2oz 128ft/s 751ft/s 48.0G 2,232ft 9.2s 8s
OK Cesaroni I287 61.3oz 79ft/s 703ft/s 17.6G 2,259ft 9.6s 8s
OK Loki I430 59.0oz 107ft/s 820ft/s 31.4G 2,338ft 9.5s 8s
OK Loki I210 59.0oz 96ft/s 629ft/s 26.0G 2,343ft 9.7s 7s
OK Loki I377 59.8oz 120ft/s 740ft/s 38.7G 2,346ft 9.5s 8s
OK Cesaroni I470 57.5oz 113ft/s 864ft/s 33.9G 2,347ft 9.3s 8s
OK Cesaroni I285 57.8oz 86ft/s 717ft/s 21.0G 2,354ft 9.7s 8s
OK AeroTech I366 59.6oz 103ft/s 767ft/s 28.6G 2,371ft 9.5s 8s
OK AeroTech I327 62.2oz 96ft/s 764ft/s 24.0G 2,389ft 9.7s 8s
OK AeroTech I364 63.9oz 86ft/s 744ft/s 21.7G 2,398ft 9.7s 8s
OK Cesaroni I255 58.2oz 80ft/s 700ft/s 18.3G 2,404ft 9.8s 8s
OK AMW I297 60.8oz 88ft/s 747ft/s 21.1G 2,418ft 9.7s 8s
OK AeroTech I435 58.3oz 128ft/s 851ft/s 45.7G 2,427ft 9.4s 8s
OK Cesaroni I303 57.6oz 88ft/s 756ft/s 24.8G 2,437ft 9.7s 8s
warningsW Loki I110 60.8oz 61ft/s 516ft/s 14.6G 2,463ft 10.8s 7s
OK AeroTech I280 61.7oz 82ft/s 744ft/s 18.7G 2,485ft 9.9s 8s
OK Cesaroni I242 59.4oz 78ft/s 704ft/s 16.3G 2,531ft 10.1s 8s
OK AeroTech I284 59.6oz 102ft/s 775ft/s 27.8G 2,533ft 9.7s 8s
OK AeroTech I500 60.3oz 108ft/s 922ft/s 33.4G 2,549ft 9.6s 8s
OK Cesaroni I350 67.6oz 89ft/s 786ft/s 20.4G 2,551ft 10.0s 8s
OK AeroTech I600 61.2oz 134ft/s 944ft/s 47.3G 2,555ft 9.5s 8s
OK AeroTech J350 63.5oz 123ft/s 869ft/s 45.7G 2,647ft 9.7s 8s
OK AeroTech I350 61.7oz 97ft/s 875ft/s 26.5G 2,648ft 9.8s 8s
OK AeroTech J420 62.9oz 104ft/s 864ft/s 31.0G 2,654ft 9.9s 8s
OK AeroTech J340 60.4oz 110ft/s 843ft/s 34.8G 2,684ft 9.8s 8s
OK Cesaroni J357 61.2oz 97ft/s 862ft/s 29.3G 2,719ft 9.9s 8s
OK AeroTech J425 62.3oz 92ft/s 930ft/s 23.8G 2,738ft 9.9s 8s
OK Cesaroni J285 61.0oz 84ft/s 797ft/s 20.1G 2,772ft 10.2s 8s
OK AeroTech J500 63.1oz 123ft/s 951ft/s 44.3G 2,786ft 9.8s 8s
OK AeroTech I59 57.2oz 57ft/s 385ft/s 9.3G 2,881ft 13.4s 5s
OK AeroTech J270 62.6oz 84ft/s 807ft/s 19.6G 2,928ft 10.5s 8s
OK AeroTech J435 62.0oz 114ft/s 977ft/s 39.1G 2,945ft 10.0s 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 (46ft/s)
failedG AeroTech G61 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni G69 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni G46 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni G79 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni G60 speed at end of launch guide too slow (45ft/s)
failedG AeroTech G69 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (36ft/s)
failedG Cesaroni G78 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (34ft/s)
failedG AeroTech H73 speed at end of launch guide too slow (41ft/s)
failedG AeroTech H112 speed at end of launch guide too slow (47ft/s)
failedG AeroTech H45 speed at end of launch guide too slow (43ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (32ft/s)
failedG Cesaroni I55 speed at end of launch guide too slow (35ft/s)

G These simulations were run with a launch guide length of 6ft (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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