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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 94 motors that fit and appear to have enough thrust (703 motors didn't fit, 14 motors failed safety checks). 108 motor had thrust curves available and 232 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:   Miranda 38
Owner: Mitch Smith
Body Diameter: 3.90in
Dry Weight: 53.0oz
MMT Diameter: 38.0mm
MMT Length: 14.00in
CD: 0.40

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 61.5oz 50ft/s 157ft/s 4.7G 485ft 6.0s 4s
OK Loki G70 61.5oz 50ft/s 166ft/s 4.9G 544ft 6.4s 5s
OK Loki G80 62.0oz 53ft/s 175ft/s 5.5G 566ft 6.3s 5s
OK AeroTech G339 59.4oz 105ft/s 208ft/s 21.9G 585ft 6.0s 6s
OK Loki G94 61.5oz 59ft/s 187ft/s 6.7G 606ft 6.5s 5s
OK Loki G66 61.8oz 53ft/s 185ft/s 5.8G 681ft 7.1s 5s
OK Cesaroni G185 59.6oz 71ft/s 225ft/s 11.5G 697ft 6.7s 6s
OK Cesaroni G115 59.9oz 57ft/s 230ft/s 6.9G 790ft 7.3s 6s
OK Loki H100 64.8oz 57ft/s 285ft/s 7.2G 1,236ft 9.0s 7s
warningsW AeroTech H283 61.7oz 94ft/s 346ft/s 18.6G 1,333ft 8.7s 8s
OK AeroTech H148 63.9oz 70ft/s 330ft/s 9.9G 1,399ft 9.3s 8s
OK AeroTech H130 61.4oz 85ft/s 325ft/s 14.2G 1,429ft 9.2s 8s
OK AeroTech H669 61.9oz 147ft/s 405ft/s 63.4G 1,529ft 9.1s 9s
OK AeroTech H123 62.7oz 60ft/s 322ft/s 7.5G 1,536ft 9.9s 7s
OK AeroTech H100 62.2oz 55ft/s 327ft/s 6.5G 1,540ft 10.0s 8s
OK Loki H90 64.8oz 59ft/s 315ft/s 7.1G 1,555ft 10.0s 7s
OK Cesaroni H123 63.5oz 55ft/s 358ft/s 7.4G 1,588ft 10.0s 8s
OK Loki H144 64.9oz 81ft/s 355ft/s 12.8G 1,607ft 9.7s 8s
OK Loki H125 65.1oz 70ft/s 343ft/s 10.3G 1,612ft 10.0s 8s
OK Cesaroni H143 65.2oz 58ft/s 369ft/s 8.0G 1,625ft 10.1s 8s
OK AeroTech H219 62.2oz 87ft/s 392ft/s 15.9G 1,636ft 9.6s 9s
OK AeroTech H242 62.3oz 79ft/s 397ft/s 12.7G 1,723ft 9.9s 9s
OK Loki H160 64.8oz 88ft/s 385ft/s 15.0G 1,749ft 10.0s 9s
OK AeroTech H112 66.4oz 49ft/s 336ft/s 5.0G 1,754ft 10.9s 8s
OK Cesaroni H400 63.0oz 104ft/s 451ft/s 24.5G 1,809ft 9.9s 9s
OK Cesaroni H120 63.4oz 58ft/s 386ft/s 7.4G 1,825ft 10.6s 8s
OK Cesaroni H110 64.5oz 53ft/s 380ft/s 5.9G 1,860ft 10.9s 8s
OK Cesaroni H125 63.3oz 57ft/s 402ft/s 7.6G 1,880ft 10.7s 9s
OK Cesaroni H152 63.5oz 68ft/s 424ft/s 11.0G 1,984ft 10.8s 9s
OK Cesaroni H100 64.5oz 53ft/s 392ft/s 5.6G 2,003ft 11.3s 9s
OK AeroTech H178 64.4oz 65ft/s 446ft/s 11.1G 2,016ft 10.8s 9s
OK Cesaroni H225 59.8oz 82ft/s 474ft/s 14.5G 2,026ft 10.5s 9s
OK AeroTech H550 64.4oz 130ft/s 544ft/s 35.4G 2,240ft 10.6s 10s
OK AeroTech I218 66.1oz 84ft/s 486ft/s 14.6G 2,242ft 11.0s 10s
OK AeroTech H550 64.1oz 131ft/s 551ft/s 35.8G 2,244ft 10.6s 10s
warningsW Cesaroni H565 65.8oz 129ft/s 552ft/s 34.4G 2,265ft 10.7s 10s
OK AeroTech H170 64.6oz 70ft/s 473ft/s 10.4G 2,274ft 11.3s 9s
OK AeroTech H999 64.7oz 174ft/s 572ft/s 88.5G 2,283ft 10.6s 10s
OK AeroTech I180 66.6oz 99ft/s 460ft/s 18.6G 2,295ft 11.2s 9s
OK AeroTech I161 65.9oz 72ft/s 471ft/s 10.9G 2,360ft 11.5s 9s
OK AeroTech I175 65.3oz 79ft/s 471ft/s 12.9G 2,380ft 11.6s 10s
OK Cesaroni I180 66.9oz 66ft/s 502ft/s 10.4G 2,393ft 11.6s 10s
OK AeroTech I140 65.6oz 65ft/s 464ft/s 8.9G 2,432ft 11.8s 9s
OK AeroTech I225 70.1oz 73ft/s 516ft/s 13.3G 2,480ft 11.6s 10s
OK AeroTech I245 65.9oz 104ft/s 528ft/s 21.7G 2,487ft 11.3s 10s
OK AeroTech I357 65.1oz 99ft/s 550ft/s 20.0G 2,507ft 11.3s 10s
OK Cesaroni I212 69.8oz 71ft/s 534ft/s 12.1G 2,529ft 11.8s 10s
OK Cesaroni I566 66.6oz 121ft/s 630ft/s 32.8G 2,620ft 11.3s 11s
OK AeroTech I154 70.4oz 59ft/s 469ft/s 7.6G 2,661ft 12.6s 9s
OK Cesaroni I195 67.7oz 75ft/s 564ft/s 11.6G 2,805ft 12.3s 10s
OK Cesaroni I345 66.9oz 96ft/s 632ft/s 20.0G 2,824ft 11.9s 11s
OK AeroTech I285 70.4oz 93ft/s 605ft/s 18.4G 2,855ft 12.0s 11s
OK Cesaroni I800 69.1oz 145ft/s 697ft/s 46.2G 2,870ft 11.7s 11s
OK Cesaroni I170 66.8oz 71ft/s 577ft/s 11.1G 2,891ft 12.4s 10s
OK Cesaroni I175 68.4oz 67ft/s 565ft/s 9.1G 2,904ft 12.6s 10s
OK AeroTech I1299 67.9oz 192ft/s 728ft/s 80.7G 2,926ft 11.6s 11s
OK Cesaroni I236 67.1oz 82ft/s 607ft/s 15.7G 2,940ft 12.3s 11s
OK AeroTech I305 73.5oz 95ft/s 617ft/s 19.2G 2,964ft 12.1s 11s
OK AeroTech I211 69.0oz 86ft/s 589ft/s 15.7G 3,008ft 12.4s 10s
OK Cesaroni I223 70.4oz 73ft/s 613ft/s 12.0G 3,013ft 12.5s 11s
OK AeroTech I195 73.2oz 89ft/s 580ft/s 16.8G 3,019ft 12.5s 10s
OK AeroTech I300 68.6oz 103ft/s 638ft/s 23.4G 3,029ft 12.2s 11s
OK Loki I316 72.0oz 110ft/s 655ft/s 24.2G 3,199ft 12.4s 11s
OK Cesaroni I287 74.3oz 84ft/s 679ft/s 15.7G 3,277ft 12.8s 11s
warningsW Loki I110 73.8oz 63ft/s 530ft/s 11.9G 3,322ft 13.6s 10s
OK Loki I405 72.2oz 137ft/s 711ft/s 39.1G 3,331ft 12.4s 11s
OK Loki I210 72.0oz 95ft/s 624ft/s 21.1G 3,347ft 12.9s 11s
OK Cesaroni I285 70.8oz 88ft/s 709ft/s 16.9G 3,466ft 13.0s 11s
OK Loki I377 72.8oz 125ft/s 722ft/s 31.6G 3,495ft 12.8s 11s
OK Loki I430 72.0oz 108ft/s 773ft/s 25.6G 3,510ft 12.8s 12s
OK Cesaroni I255 71.2oz 83ft/s 703ft/s 15.1G 3,518ft 13.1s 11s
OK AeroTech I327 75.2oz 96ft/s 739ft/s 19.7G 3,553ft 13.0s 11s
OK AeroTech I366 72.6oz 108ft/s 755ft/s 23.3G 3,565ft 12.9s 11s
OK AeroTech I364 76.9oz 93ft/s 734ft/s 18.7G 3,570ft 13.0s 11s
OK AMW I297 73.8oz 92ft/s 733ft/s 17.2G 3,579ft 13.1s 11s
OK Cesaroni I470 70.5oz 117ft/s 814ft/s 27.5G 3,600ft 12.8s 12s
OK AeroTech I59 70.2oz 58ft/s 359ft/s 7.7G 3,602ft 15.7s 7s
OK Cesaroni I303 70.6oz 93ft/s 748ft/s 20.0G 3,639ft 13.1s 11s
OK AeroTech I280 74.7oz 86ft/s 743ft/s 15.2G 3,684ft 13.3s 11s
OK Cesaroni I242 72.4oz 79ft/s 722ft/s 13.2G 3,708ft 13.5s 11s
OK AeroTech I435 71.3oz 133ft/s 821ft/s 37.2G 3,746ft 12.9s 12s
OK Cesaroni I350 80.6oz 93ft/s 774ft/s 16.9G 3,802ft 13.5s 12s
OK AeroTech I284 72.6oz 105ft/s 783ft/s 23.2G 3,840ft 13.2s 11s
OK AeroTech I500 73.3oz 112ft/s 885ft/s 27.3G 3,985ft 13.2s 12s
OK AeroTech I600 74.2oz 134ft/s 909ft/s 38.8G 4,031ft 13.2s 12s
OK AeroTech I350 74.7oz 99ft/s 881ft/s 22.7G 4,105ft 13.6s 12s
OK AeroTech J420 75.9oz 109ft/s 869ft/s 25.6G 4,106ft 13.6s 12s
OK AeroTech J350 76.5oz 127ft/s 868ft/s 37.8G 4,107ft 13.4s 12s
OK AeroTech J340 73.4oz 112ft/s 860ft/s 28.5G 4,134ft 13.5s 11s
OK Cesaroni J357 74.2oz 105ft/s 877ft/s 24.0G 4,196ft 13.7s 12s
OK Cesaroni J285 74.0oz 89ft/s 823ft/s 16.8G 4,201ft 13.9s 12s
OK AeroTech J425 75.3oz 93ft/s 934ft/s 20.6G 4,276ft 13.8s 12s
OK AeroTech J500 76.1oz 133ft/s 964ft/s 36.5G 4,421ft 13.7s 12s
OK AeroTech J270 75.6oz 88ft/s 847ft/s 16.0G 4,449ft 14.2s 12s

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 (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 (36ft/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 (45ft/s)
failedG AeroTech G69 speed at end of launch guide too slow (43ft/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 (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 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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