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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 107 motors that fit and appear to have enough thrust (690 motors didn't fit, 14 motors failed safety checks). 121 motor had thrust curves available and 254 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:   lil Monster 38
Owner: John Taylor
Body Diameter: 4.00in
Dry Weight: 1,100g
MMT Diameter: 38.0mm
MMT Length: 15.00in
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 Loki G69 1,340g 49ft/s 201ft/s 6.5G 600ft 6.2s 5s
OK AeroTech G339 1,281g 107ft/s 271ft/s 29.0G 644ft 5.9s 5s
OK Loki G70 1,342g 49ft/s 210ft/s 6.7G 654ft 6.5s 5s
OK Loki G80 1,355g 53ft/s 221ft/s 7.4G 664ft 6.4s 5s
OK Loki G94 1,340g 56ft/s 236ft/s 8.9G 691ft 6.4s 5s
OK Cesaroni G185 1,288g 71ft/s 291ft/s 14.9G 740ft 6.3s 6s
OK Loki G66 1,350g 53ft/s 229ft/s 7.7G 768ft 7.0s 5s
OK Cesaroni G115 1,295g 58ft/s 289ft/s 9.3G 829ft 6.9s 6s
warningsW AeroTech H283 1,347g 95ft/s 425ft/s 24.0G 1,127ft 7.3s 7s
OK Loki H100 1,435g 56ft/s 332ft/s 8.7G 1,137ft 7.8s 6s
OK AeroTech H669 1,352g 144ft/s 512ft/s 82.6G 1,203ft 7.3s 7s
OK AeroTech H148 1,409g 68ft/s 382ft/s 12.9G 1,211ft 7.9s 6s
OK AeroTech H130 1,337g 83ft/s 370ft/s 18.8G 1,214ft 7.7s 6s
OK AeroTech H219 1,361g 89ft/s 460ft/s 20.9G 1,306ft 7.7s 7s
OK AeroTech H123 1,375g 59ft/s 360ft/s 10.0G 1,319ft 8.3s 6s
OK AeroTech H100 1,361g 55ft/s 361ft/s 8.4G 1,326ft 8.4s 6s
OK Loki H144 1,436g 80ft/s 402ft/s 16.6G 1,327ft 8.0s 6s
OK Cesaroni H123 1,397g 53ft/s 411ft/s 9.6G 1,337ft 8.3s 6s
OK Cesaroni H143 1,447g 57ft/s 422ft/s 9.7G 1,348ft 8.3s 7s
OK Loki H125 1,442g 71ft/s 382ft/s 13.5G 1,353ft 8.2s 6s
OK Loki H90 1,435g 58ft/s 345ft/s 9.4G 1,358ft 8.5s 6s
OK Cesaroni H400 1,384g 100ft/s 552ft/s 30.9G 1,364ft 7.7s 7s
OK AeroTech H242 1,364g 78ft/s 458ft/s 16.6G 1,366ft 8.0s 7s
OK Loki H160 1,435g 84ft/s 434ft/s 19.5G 1,395ft 8.0s 7s
OK Cesaroni H120 1,395g 56ft/s 424ft/s 9.8G 1,477ft 8.6s 6s
OK Cesaroni H225 1,293g 86ft/s 547ft/s 19.3G 1,488ft 8.0s 7s
OK AeroTech H112 1,479g 48ft/s 358ft/s 6.6G 1,498ft 9.2s 6s
OK Cesaroni H125 1,393g 56ft/s 447ft/s 9.5G 1,500ft 8.7s 7s
OK Cesaroni H110 1,425g 52ft/s 415ft/s 7.4G 1,522ft 8.9s 6s
OK AeroTech H178 1,424g 65ft/s 501ft/s 13.0G 1,532ft 8.4s 7s
OK Cesaroni H152 1,398g 67ft/s 469ft/s 14.5G 1,537ft 8.5s 7s
OK AeroTech H550 1,416g 127ft/s 660ft/s 45.7G 1,545ft 7.9s 7s
OK AeroTech H999 1,431g 175ft/s 705ft/s 113.8G 1,555ft 7.8s 7s
OK AeroTech H550 1,423g 127ft/s 651ft/s 45.2G 1,558ft 7.9s 7s
warningsW Cesaroni H565 1,462g 127ft/s 666ft/s 42.2G 1,573ft 8.0s 7s
OK Cesaroni H100 1,427g 52ft/s 413ft/s 7.5G 1,618ft 9.2s 6s
OK AeroTech I218 1,472g 84ft/s 533ft/s 18.8G 1,640ft 8.5s 7s
OK AeroTech H170 1,430g 68ft/s 506ft/s 13.2G 1,683ft 8.7s 7s
OK AeroTech I180 1,485g 96ft/s 488ft/s 23.9G 1,688ft 8.5s 7s
OK AeroTech I161 1,466g 72ft/s 495ft/s 14.1G 1,739ft 8.9s 7s
OK AeroTech I245 1,465g 100ft/s 562ft/s 27.3G 1,740ft 8.5s 7s
OK Cesaroni I566 1,484g 116ft/s 744ft/s 40.2G 1,741ft 8.2s 8s
OK AeroTech I357 1,443g 96ft/s 603ft/s 25.8G 1,741ft 8.4s 7s
OK Cesaroni I180 1,494g 63ft/s 544ft/s 12.3G 1,745ft 8.9s 7s
OK AeroTech I225 1,586g 72ft/s 553ft/s 15.7G 1,775ft 8.8s 7s
OK AeroTech I175 1,448g 81ft/s 494ft/s 16.6G 1,791ft 9.1s 7s
OK Cesaroni I212 1,575g 66ft/s 572ft/s 13.8G 1,804ft 8.9s 7s
OK AeroTech I140 1,456g 64ft/s 470ft/s 11.3G 1,805ft 9.2s 7s
OK AeroTech I1299 1,522g 191ft/s 880ft/s 99.3G 1,840ft 8.2s 8s
OK Cesaroni I800 1,557g 139ft/s 828ft/s 54.2G 1,844ft 8.4s 8s
OK Cesaroni I345 1,495g 93ft/s 695ft/s 25.6G 1,892ft 8.7s 7s
OK AeroTech I285 1,593g 88ft/s 642ft/s 23.0G 1,943ft 8.9s 7s
OK Cesaroni I195 1,517g 69ft/s 578ft/s 14.8G 1,965ft 9.2s 7s
OK AeroTech I305 1,681g 90ft/s 651ft/s 23.5G 1,988ft 8.9s 7s
OK AeroTech I154 1,592g 57ft/s 461ft/s 9.7G 1,996ft 9.9s 6s
OK Cesaroni I236 1,500g 83ft/s 632ft/s 20.2G 1,999ft 9.0s 7s
OK Cesaroni I170 1,492g 69ft/s 594ft/s 14.3G 2,014ft 9.3s 7s
OK AeroTech I300 1,541g 103ft/s 668ft/s 29.8G 2,019ft 8.9s 7s
OK Cesaroni I175 1,538g 65ft/s 573ft/s 11.5G 2,042ft 9.5s 7s
OK Cesaroni I223 1,594g 71ft/s 633ft/s 15.2G 2,055ft 9.3s 7s
OK AeroTech I211 1,555g 85ft/s 593ft/s 20.0G 2,057ft 9.2s 7s
OK AeroTech I195 1,672g 85ft/s 588ft/s 21.0G 2,081ft 9.3s 7s
OK Loki I316 1,640g 109ft/s 681ft/s 29.8G 2,111ft 9.0s 8s
OK Loki I405 1,643g 131ft/s 751ft/s 49.0G 2,134ft 8.9s 8s
OK Cesaroni I287 1,705g 78ft/s 700ft/s 17.8G 2,167ft 9.3s 8s
OK Loki I430 1,640g 100ft/s 819ft/s 32.1G 2,235ft 9.1s 8s
OK Cesaroni I470 1,595g 116ft/s 863ft/s 34.7G 2,239ft 9.0s 8s
OK Loki I377 1,660g 122ft/s 738ft/s 39.5G 2,245ft 9.2s 8s
OK Loki I210 1,640g 91ft/s 626ft/s 26.5G 2,251ft 9.5s 7s
OK Cesaroni I285 1,606g 88ft/s 712ft/s 21.4G 2,256ft 9.4s 7s
OK AeroTech I366 1,656g 105ft/s 762ft/s 29.2G 2,268ft 9.2s 8s
OK AeroTech I327 1,728g 98ft/s 761ft/s 24.5G 2,288ft 9.3s 8s
OK AeroTech I364 1,778g 88ft/s 740ft/s 22.1G 2,297ft 9.4s 8s
OK Cesaroni I255 1,616g 82ft/s 694ft/s 18.6G 2,306ft 9.5s 8s
OK AeroTech I435 1,618g 128ft/s 848ft/s 46.7G 2,316ft 9.0s 8s
OK AMW I297 1,691g 90ft/s 742ft/s 21.6G 2,317ft 9.4s 8s
OK Cesaroni I303 1,600g 90ft/s 751ft/s 25.3G 2,333ft 9.4s 7s
OK KBA I550 1,812g 104ft/s 893ft/s 33.4G 2,370ft 9.4s 8s
warningsW Loki I110 1,689g 62ft/s 512ft/s 15.0G 2,381ft 10.5s 7s
OK AeroTech I280 1,716g 84ft/s 738ft/s 19.1G 2,382ft 9.6s 8s
OK AeroTech I284 1,656g 103ft/s 768ft/s 28.4G 2,424ft 9.4s 7s
OK Cesaroni I242 1,650g 80ft/s 696ft/s 16.7G 2,430ft 9.8s 7s
OK AeroTech I500 1,676g 110ft/s 921ft/s 34.1G 2,431ft 9.2s 8s
warningsW Cesaroni I540 1,698g 115ft/s 953ft/s 36.6G 2,431ft 9.2s 8s
OK AeroTech I600 1,702g 137ft/s 941ft/s 48.3G 2,434ft 9.2s 8s
OK Cesaroni I350 1,882g 88ft/s 782ft/s 20.8G 2,444ft 9.7s 8s
OK KBA I301 1,826g 81ft/s 739ft/s 21.5G 2,482ft 9.9s 8s
OK KBA J740 1,824g 137ft/s 1,035ft/s 49.7G 2,482ft 9.3s 8s
OK KBA J520 1,822g 107ft/s 914ft/s 38.9G 2,509ft 9.6s 8s
OK AeroTech J350 1,765g 126ft/s 863ft/s 46.6G 2,527ft 9.4s 8s
OK AeroTech I350 1,716g 99ft/s 867ft/s 26.9G 2,529ft 9.5s 8s
OK AeroTech J420 1,750g 104ft/s 857ft/s 31.6G 2,534ft 9.5s 8s
OK AeroTech J340 1,677g 113ft/s 835ft/s 35.6G 2,566ft 9.4s 7s
OK Cesaroni J357 1,701g 99ft/s 854ft/s 29.9G 2,598ft 9.6s 8s
OK Cesaroni J335 1,727g 92ft/s 820ft/s 23.3G 2,599ft 9.7s 8s
OK AeroTech J425 1,731g 94ft/s 922ft/s 24.2G 2,614ft 9.6s 8s
OK Cesaroni J285 1,695g 86ft/s 789ft/s 20.5G 2,655ft 9.9s 8s
OK AeroTech J500 1,754g 126ft/s 942ft/s 45.2G 2,656ft 9.4s 8s
OK Cesaroni J316 1,707g 92ft/s 801ft/s 25.1G 2,690ft 10.0s 8s
OK Cesaroni J270 1,755g 79ft/s 765ft/s 15.9G 2,697ft 10.1s 8s
OK Cesaroni I125 1,747g 70ft/s 527ft/s 14.6G 2,723ft 11.1s 7s
OK Cesaroni I216 1,701g 82ft/s 697ft/s 19.3G 2,731ft 10.3s 7s
OK Cesaroni J290 1,760g 91ft/s 794ft/s 21.8G 2,746ft 10.1s 8s
OK AeroTech J270 1,742g 86ft/s 797ft/s 20.0G 2,806ft 10.1s 8s
OK AeroTech I59 1,587g 58ft/s 387ft/s 9.5G 2,806ft 13.2s 5s
OK AeroTech J435 1,724g 117ft/s 966ft/s 39.9G 2,809ft 9.7s 8s
OK Cesaroni J94 1,760g 52ft/s 482ft/s 8.4G 3,224ft 12.9s 6s

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 (47ft/s)
failedG AeroTech G61 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni G69 speed at end of launch guide too slow (44ft/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 (42ft/s)
failedG Cesaroni G60 speed at end of launch guide too slow (46ft/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 (37ft/s)
failedG Cesaroni G78 speed at end of launch guide too slow (45ft/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 (42ft/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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