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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 78 motors that fit and appear to have enough thrust (718 motors didn't fit, 14 motors failed safety checks). 92 motor had thrust curves available and 206 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:   38mm School Rocket
Owner: William Saindon
Body Diameter: 3.00in
Dry Weight: 1,100g
MMT Diameter: 38.0mm
MMT Length: 12.00in
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 1,340g 49ft/s 212ft/s 6.5G 726ft 7.0s 5s
OK Loki G70 1,342g 49ft/s 223ft/s 6.7G 801ft 7.3s 6s
OK AeroTech G339 1,281g 107ft/s 275ft/s 29.1G 817ft 6.8s 6s
OK Loki G80 1,355g 53ft/s 233ft/s 7.5G 817ft 7.2s 6s
OK Loki G94 1,340g 56ft/s 248ft/s 9.0G 862ft 7.4s 6s
OK Cesaroni G185 1,288g 71ft/s 300ft/s 15.2G 955ft 7.4s 7s
OK Loki G66 1,350g 53ft/s 246ft/s 7.8G 964ft 8.0s 6s
OK Cesaroni G115 1,295g 58ft/s 305ft/s 9.3G 1,075ft 8.0s 7s
OK Loki H100 1,435g 57ft/s 361ft/s 9.2G 1,527ft 9.4s 7s
warningsW AeroTech H283 1,347g 95ft/s 447ft/s 24.4G 1,575ft 9.0s 8s
OK AeroTech H148 1,409g 68ft/s 417ft/s 13.0G 1,667ft 9.5s 8s
OK AeroTech H130 1,337g 83ft/s 410ft/s 18.8G 1,684ft 9.4s 8s
OK AeroTech H669 1,352g 144ft/s 525ft/s 82.6G 1,730ft 9.1s 9s
OK AeroTech H123 1,375g 59ft/s 404ft/s 10.0G 1,817ft 10.1s 8s
OK AeroTech H100 1,361g 55ft/s 410ft/s 8.6G 1,827ft 10.1s 8s
OK Loki H144 1,436g 80ft/s 442ft/s 16.7G 1,851ft 9.8s 8s
OK Loki H90 1,435g 58ft/s 391ft/s 9.4G 1,852ft 10.3s 8s
OK AeroTech H219 1,361g 89ft/s 498ft/s 21.0G 1,856ft 9.6s 9s
OK Cesaroni H123 1,397g 53ft/s 453ft/s 9.6G 1,857ft 10.1s 8s
OK Loki H125 1,442g 71ft/s 425ft/s 13.5G 1,873ft 10.1s 8s
OK Cesaroni H143 1,447g 57ft/s 465ft/s 10.2G 1,881ft 10.1s 8s
OK AeroTech H242 1,364g 78ft/s 501ft/s 16.7G 1,942ft 9.9s 8s
OK Loki H160 1,435g 84ft/s 477ft/s 19.5G 1,971ft 9.9s 8s
OK Cesaroni H400 1,384g 100ft/s 579ft/s 31.7G 1,983ft 9.7s 9s
OK AeroTech H112 1,479g 48ft/s 414ft/s 6.6G 2,052ft 11.0s 8s
OK Cesaroni H120 1,395g 56ft/s 480ft/s 9.8G 2,074ft 10.6s 8s
OK Cesaroni H125 1,393g 56ft/s 501ft/s 9.8G 2,119ft 10.6s 9s
OK Cesaroni H110 1,425g 52ft/s 471ft/s 7.7G 2,123ft 10.8s 8s
OK Cesaroni H225 1,293g 86ft/s 603ft/s 19.3G 2,177ft 10.1s 9s
OK Cesaroni H152 1,398g 67ft/s 527ft/s 14.5G 2,191ft 10.6s 9s
OK AeroTech H178 1,424g 65ft/s 556ft/s 14.1G 2,200ft 10.5s 9s
OK Cesaroni H100 1,427g 52ft/s 480ft/s 7.5G 2,263ft 11.2s 8s
OK AeroTech H550 1,416g 128ft/s 699ft/s 46.3G 2,314ft 10.1s 10s
OK AeroTech H550 1,423g 127ft/s 689ft/s 45.8G 2,326ft 10.1s 10s
OK AeroTech H999 1,431g 175ft/s 730ft/s 113.8G 2,345ft 10.1s 10s
warningsW Cesaroni H565 1,462g 120ft/s 699ft/s 42.7G 2,348ft 10.2s 10s
OK AeroTech I218 1,472g 84ft/s 595ft/s 18.9G 2,382ft 10.7s 9s
OK AeroTech H170 1,430g 68ft/s 578ft/s 13.3G 2,427ft 10.9s 9s
OK AeroTech I180 1,485g 97ft/s 553ft/s 23.9G 2,436ft 10.8s 9s
OK AeroTech I161 1,466g 72ft/s 567ft/s 14.1G 2,506ft 11.1s 9s
OK Cesaroni I180 1,494g 64ft/s 613ft/s 13.0G 2,528ft 11.1s 9s
OK AeroTech I245 1,465g 100ft/s 637ft/s 27.8G 2,564ft 10.8s 9s
OK AeroTech I357 1,443g 96ft/s 673ft/s 25.9G 2,575ft 10.7s 9s
OK AeroTech I225 1,586g 72ft/s 623ft/s 16.5G 2,582ft 11.1s 9s
OK AeroTech I140 1,456g 64ft/s 553ft/s 11.6G 2,591ft 11.4s 9s
OK Cesaroni I212 1,575g 66ft/s 647ft/s 14.9G 2,632ft 11.2s 10s
OK Cesaroni I566 1,484g 116ft/s 791ft/s 41.7G 2,634ft 10.6s 10s
OK Cesaroni I800 1,557g 140ft/s 873ft/s 56.5G 2,823ft 10.8s 10s
OK AeroTech I154 1,592g 58ft/s 550ft/s 9.8G 2,830ft 12.2s 9s
OK Cesaroni I345 1,495g 93ft/s 773ft/s 25.6G 2,834ft 11.1s 10s
OK AeroTech I1299 1,522g 191ft/s 916ft/s 102.2G 2,847ft 10.7s 10s
OK Cesaroni I195 1,517g 70ft/s 672ft/s 15.0G 2,876ft 11.6s 10s
OK AeroTech I285 1,593g 88ft/s 725ft/s 23.3G 2,881ft 11.3s 10s
OK AeroTech I305 1,681g 91ft/s 732ft/s 24.0G 2,950ft 11.3s 10s
OK Cesaroni I170 1,492g 69ft/s 688ft/s 14.4G 2,951ft 11.7s 9s
OK Cesaroni I236 1,500g 83ft/s 725ft/s 20.2G 2,960ft 11.5s 10s
OK Cesaroni I175 1,538g 65ft/s 670ft/s 11.6G 2,974ft 11.8s 9s
OK AeroTech I300 1,541g 103ft/s 762ft/s 29.8G 3,010ft 11.4s 10s
OK AeroTech I211 1,555g 85ft/s 692ft/s 20.0G 3,024ft 11.6s 9s
OK Cesaroni I223 1,594g 71ft/s 728ft/s 15.2G 3,030ft 11.7s 10s
OK AeroTech I195 1,672g 85ft/s 678ft/s 21.1G 3,045ft 11.8s 9s
OK Loki I316 1,640g 109ft/s 772ft/s 30.3G 3,158ft 11.6s 10s
OK Cesaroni I287 1,705g 78ft/s 801ft/s 19.0G 3,227ft 11.9s 10s
OK Loki I405 1,643g 131ft/s 841ft/s 49.0G 3,233ft 11.5s 10s
OK Loki I210 1,640g 91ft/s 724ft/s 26.5G 3,324ft 12.0s 10s
OK Cesaroni I285 1,606g 88ft/s 830ft/s 21.5G 3,377ft 12.0s 10s
OK Loki I377 1,660g 122ft/s 843ft/s 39.5G 3,388ft 11.8s 10s
OK Loki I430 1,640g 100ft/s 922ft/s 32.1G 3,394ft 11.8s 11s
warningsW Loki I110 1,689g 62ft/s 607ft/s 15.0G 3,406ft 12.9s 9s
OK AeroTech I366 1,656g 105ft/s 883ft/s 29.2G 3,429ft 11.8s 10s
OK Cesaroni I470 1,595g 116ft/s 973ft/s 34.7G 3,430ft 11.7s 11s
OK Cesaroni I255 1,616g 82ft/s 817ft/s 19.0G 3,437ft 12.1s 10s
OK Cesaroni I303 1,600g 90ft/s 875ft/s 25.4G 3,508ft 12.0s 10s
OK AeroTech I435 1,618g 129ft/s 966ft/s 46.7G 3,543ft 11.7s 10s
OK Cesaroni I242 1,650g 80ft/s 830ft/s 16.7G 3,607ft 12.4s 10s
OK AeroTech I284 1,656g 103ft/s 902ft/s 28.9G 3,656ft 12.1s 10s
OK AeroTech I59 1,587g 58ft/s 428ft/s 9.7G 3,878ft 15.3s 7s
OK Cesaroni J357 1,701g 99ft/s 1,006ft/s 29.9G 3,943ft 12.4s 11s

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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