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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 122 motors that fit and appear to have enough thrust (659 motors didn't fit, 16 motors failed safety checks). 138 motor had thrust curves available and 291 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:   Formula 75
Owner: John Grove
Body Diameter: 8.0cm
Dry Weight: 2,098g
MMT Diameter: 38.0mm
MMT Length: 480.0mm
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 2,338g 15m/s 32m/s 3.3G 80m 4.6s 3s
OK Contrail G234 2,642g 33m/s 40m/s 20.0G 88m 4.3s 4s
OK Loki G70 2,340g 15m/s 34m/s 3.4G 91m 5.0s 3s
OK Loki G80 2,353g 17m/s 37m/s 3.9G 97m 5.0s 3s
OK AeroTech G339 2,279g 33m/s 46m/s 15.9G 104m 4.7s 4s
OK Loki G94 2,338g 18m/s 40m/s 4.8G 105m 5.1s 4s
OK Loki G66 2,348g 16m/s 39m/s 4.0G 117m 5.6s 3s
OK Contrail G123 2,609g 22m/s 43m/s 12.9G 118m 5.2s 4s
OK Contrail G100 2,609g 20m/s 42m/s 6.1G 122m 5.4s 4s
OK Cesaroni G185 2,286g 24m/s 49m/s 8.2G 124m 5.3s 5s
OK Cesaroni G115 2,293g 18m/s 49m/s 4.8G 139m 5.8s 5s
OK Contrail H222 2,618g 30m/s 53m/s 25.4G 153m 5.7s 5s
OK Loki H100 2,433g 18m/s 62m/s 5.2G 236m 7.4s 5s
warningsW AeroTech H283 2,345g 31m/s 77m/s 13.6G 264m 7.3s 7s
OK AeroTech H148 2,407g 22m/s 73m/s 7.2G 275m 7.8s 6s
OK AeroTech H130 2,335g 26m/s 72m/s 10.3G 282m 7.8s 6s
OK AeroTech H100 2,359g 18m/s 71m/s 4.6G 300m 8.4s 6s
OK AeroTech H123 2,373g 19m/s 71m/s 5.4G 301m 8.4s 6s
OK Loki H90 2,433g 18m/s 69m/s 5.1G 305m 8.5s 6s
OK AeroTech H669 2,350g 47m/s 91m/s 47.0G 314m 7.7s 7s
OK Cesaroni H123 2,395g 18m/s 79m/s 5.4G 314m 8.5s 7s
OK Loki H125 2,440g 22m/s 77m/s 7.6G 324m 8.4s 6s
OK Cesaroni H143 2,445g 19m/s 82m/s 5.9G 325m 8.6s 7s
OK Loki H144 2,434g 25m/s 80m/s 9.4G 326m 8.3s 7s
OK AeroTech H219 2,359g 28m/s 88m/s 11.7G 336m 8.2s 7s
OK AeroTech H112 2,477g 15m/s 74m/s 3.6G 347m 9.4s 6s
OK AeroTech H242 2,362g 25m/s 89m/s 9.3G 353m 8.5s 7s
OK Loki H160 2,433g 28m/s 87m/s 11.1G 362m 8.6s 7s
OK Cesaroni H120 2,393g 19m/s 85m/s 5.3G 370m 9.2s 7s
OK Cesaroni H110 2,423g 17m/s 84m/s 4.2G 375m 9.4s 7s
OK Cesaroni H400 2,382g 34m/s 101m/s 18.0G 380m 8.5s 8s
OK Cesaroni H125 2,391g 19m/s 89m/s 5.5G 384m 9.3s 7s
OK Cesaroni H100 2,425g 17m/s 87m/s 4.0G 407m 9.9s 7s
OK Cesaroni H152 2,396g 21m/s 95m/s 8.0G 413m 9.4s 8s
OK AeroTech H178 2,422g 21m/s 100m/s 8.1G 424m 9.4s 8s
OK Cesaroni H225 2,291g 27m/s 105m/s 10.5G 428m 9.2s 8s
OK AeroTech I218 2,470g 27m/s 111m/s 10.8G 487m 9.8s 8s
OK AeroTech H170 2,428g 22m/s 107m/s 7.6G 490m 10.0s 8s
OK AeroTech H550 2,421g 43m/s 124m/s 26.4G 494m 9.4s 9s
OK AeroTech H550 2,414g 43m/s 125m/s 26.6G 497m 9.4s 9s
warningsW Cesaroni H565 2,460g 42m/s 126m/s 25.8G 501m 9.5s 9s
OK AeroTech I180 2,483g 32m/s 106m/s 13.9G 501m 9.9s 8s
OK AeroTech H999 2,429g 57m/s 130m/s 66.5G 508m 9.4s 9s
OK AeroTech I161 2,464g 23m/s 107m/s 8.0G 513m 10.2s 8s
OK Cesaroni I180 2,492g 21m/s 114m/s 7.7G 522m 10.3s 8s
OK AeroTech I140 2,454g 21m/s 106m/s 6.5G 526m 10.5s 8s
OK AeroTech I225 2,584g 24m/s 119m/s 10.0G 552m 10.4s 9s
OK AeroTech I245 2,463g 33m/s 122m/s 16.2G 555m 10.2s 9s
OK AeroTech I357 2,441g 32m/s 126m/s 14.9G 560m 10.2s 9s
OK Cesaroni I212 2,573g 23m/s 123m/s 9.1G 562m 10.6s 9s
OK AeroTech I154 2,590g 19m/s 108m/s 5.6G 582m 11.3s 8s
OK Cesaroni I566 2,482g 39m/s 144m/s 24.5G 596m 10.2s 10s
OK Cesaroni I195 2,515g 24m/s 130m/s 8.6G 632m 11.1s 9s
OK Cesaroni I345 2,493g 32m/s 145m/s 15.0G 646m 10.8s 10s
OK Cesaroni I170 2,490g 24m/s 133m/s 8.2G 654m 11.3s 9s
OK AeroTech I285 2,591g 31m/s 141m/s 13.9G 655m 11.0s 9s
OK Cesaroni I175 2,536g 22m/s 130m/s 6.8G 656m 11.4s 9s
OK Cesaroni I800 2,555g 46m/s 161m/s 35.1G 668m 10.6s 10s
OK Cesaroni I236 2,498g 26m/s 140m/s 11.7G 673m 11.2s 9s
OK AeroTech I1299 2,520g 64m/s 168m/s 60.9G 687m 10.6s 10s
OK AeroTech I305 2,679g 32m/s 145m/s 14.7G 691m 11.1s 10s
OK Cesaroni I223 2,592g 24m/s 142m/s 9.1G 693m 11.5s 10s
OK AeroTech I211 2,553g 28m/s 137m/s 11.8G 693m 11.4s 9s
OK AeroTech I195 2,670g 29m/s 136m/s 12.8G 698m 11.4s 9s
OK AeroTech I300 2,539g 33m/s 149m/s 17.7G 704m 11.2s 10s
OK Loki I316 2,638g 36m/s 155m/s 18.5G 753m 11.4s 10s
warningsW Loki I110 2,687g 20m/s 125m/s 9.0G 760m 12.5s 9s
OK Cesaroni I287 2,703g 27m/s 160m/s 12.0G 772m 11.8s 10s
OK AeroTech I59 2,585g 19m/s 82m/s 5.7G 784m 14.3s 6s
OK Loki I210 2,638g 31m/s 148m/s 16.1G 786m 11.9s 10s
OK Loki I405 2,641g 45m/s 168m/s 30.0G 794m 11.5s 10s
OK Cesaroni I285 2,604g 29m/s 166m/s 12.8G 823m 12.1s 10s
OK Cesaroni I255 2,614g 28m/s 165m/s 11.4G 834m 12.2s 10s
OK Loki I377 2,658g 39m/s 171m/s 24.2G 836m 11.9s 10s
OK Loki I430 2,638g 35m/s 181m/s 19.6G 839m 11.9s 11s
OK AeroTech I327 2,726g 32m/s 175m/s 15.2G 854m 12.1s 10s
OK AeroTech I366 2,654g 35m/s 178m/s 17.8G 858m 12.0s 11s
OK AMW I297 2,689g 29m/s 173m/s 13.2G 858m 12.2s 10s
OK AeroTech I364 2,776g 31m/s 175m/s 14.4G 860m 12.2s 11s
OK Cesaroni I470 2,593g 37m/s 191m/s 20.9G 869m 11.9s 11s
OK Cesaroni I303 2,598g 30m/s 176m/s 15.2G 873m 12.3s 10s
OK AeroTech I280 2,714g 28m/s 176m/s 11.7G 885m 12.5s 11s
OK Cesaroni I242 2,648g 26m/s 171m/s 10.0G 886m 12.6s 10s
OK KBA I550 2,810g 38m/s 213m/s 24.6G 902m 11.9s 11s
OK KBA I301 2,824g 29m/s 187m/s 13.9G 903m 12.3s 10s
OK Cesaroni I125 2,745g 21m/s 137m/s 8.9G 908m 13.6s 9s
OK AeroTech I435 2,616g 43m/s 194m/s 28.5G 914m 12.1s 11s
OK Cesaroni I350 2,880g 30m/s 186m/s 13.2G 922m 12.6s 11s
OK AeroTech I284 2,654g 35m/s 186m/s 17.7G 936m 12.4s 11s
OK AeroTech I500 2,674g 38m/s 209m/s 21.0G 982m 12.5s 11s
warningsW Cesaroni I540 2,696g 39m/s 217m/s 23.1G 995m 12.5s 11s
OK AeroTech I600 2,700g 45m/s 216m/s 30.0G 998m 12.5s 11s
OK Loki J396 2,850g 31m/s 203m/s 18.6G 1,001m 12.8s 11s
OK AeroTech J420 2,748g 36m/s 208m/s 19.8G 1,012m 12.8s 11s
OK AeroTech I350 2,714g 34m/s 210m/s 17.5G 1,012m 12.8s 11s
OK Cesaroni I216 2,699g 27m/s 180m/s 11.8G 1,017m 13.3s 10s
OK KBA J740 2,822g 47m/s 226m/s 33.1G 1,017m 12.6s 12s
OK Cesaroni J335 2,725g 31m/s 202m/s 14.4G 1,018m 13.0s 11s
OK AeroTech J350 2,763g 42m/s 208m/s 29.4G 1,018m 12.7s 11s
OK Cesaroni J381 2,786g 34m/s 206m/s 17.5G 1,019m 12.9s 11s
OK AeroTech J340 2,675g 36m/s 205m/s 21.9G 1,024m 12.8s 11s
OK Cesaroni J285 2,693g 29m/s 197m/s 12.9G 1,030m 13.1s 11s
OK Cesaroni J270 2,753g 26m/s 195m/s 10.1G 1,032m 13.3s 11s
OK Cesaroni J357 2,699g 34m/s 209m/s 18.4G 1,036m 13.0s 11s
OK Cesaroni J316 2,705g 32m/s 198m/s 15.5G 1,037m 13.1s 11s
OK Cesaroni J94 2,758g 17m/s 132m/s 5.0G 1,045m 15.4s 8s
OK AeroTech J425 2,729g 32m/s 222m/s 15.8G 1,060m 13.0s 11s
OK Cesaroni J290 2,758g 30m/s 202m/s 13.5G 1,073m 13.4s 11s
OK Cesaroni J400 2,800g 33m/s 217m/s 16.4G 1,077m 13.1s 11s
OK AeroTech J270 2,740g 29m/s 204m/s 12.3G 1,101m 13.5s 11s
OK AeroTech J500 2,752g 43m/s 231m/s 28.3G 1,109m 13.0s 12s
OK Loki J528 2,843g 46m/s 238m/s 35.6G 1,120m 13.0s 12s
OK AeroTech J575 3,012g 46m/s 242m/s 28.9G 1,146m 13.1s 12s
OK Cesaroni J330 2,800g 33m/s 223m/s 15.8G 1,175m 13.7s 11s
OK Cesaroni J410 2,833g 35m/s 234m/s 17.4G 1,176m 13.6s 12s
OK AeroTech J435 2,722g 40m/s 242m/s 24.8G 1,181m 13.4s 12s
OK Cesaroni J425 2,798g 37m/s 237m/s 23.4G 1,185m 13.5s 12s
OK Loki J712 2,850g 44m/s 258m/s 30.5G 1,189m 13.3s 12s
OK Loki J320 2,850g 33m/s 226m/s 17.9G 1,231m 14.0s 11s
OK Cesaroni J354 2,876g 34m/s 230m/s 17.5G 1,232m 13.9s 11s
OK AeroTech J825 2,973g 52m/s 302m/s 39.4G 1,347m 13.7s 13s
OK AeroTech J570 3,000g 51m/s 276m/s 38.2G 1,433m 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
failedA Contrail G130 rocket doesn't reach a safe altitude (64m)
failedG AeroTech G67 speed at end of launch guide too slow (14m/s)
failedG AeroTech G61 speed at end of launch guide too slow (14m/s)
failedG Cesaroni G69 speed at end of launch guide too slow (13m/s)
failedG Cesaroni G46 speed at end of launch guide too slow (11m/s)
failedG Cesaroni G79 speed at end of launch guide too slow (13m/s)
failedG Cesaroni G60 speed at end of launch guide too slow (14m/s)
failedG AeroTech G69 speed at end of launch guide too slow (13m/s)
failedG Cesaroni G58 speed at end of launch guide too slow (11m/s)
failedG Cesaroni G78 speed at end of launch guide too slow (14m/s)
failedG Cesaroni G50 speed at end of launch guide too slow (10m/s)
failedA Contrail G300 rocket doesn't reach a safe altitude (66m)
failedG AeroTech H73 speed at end of launch guide too slow (13m/s)
failedG AeroTech H45 speed at end of launch guide too slow (14m/s)
failedG AeroTech I49 speed at end of launch guide too slow (10m/s)
failedG Cesaroni I55 speed at end of launch guide too slow (11m/s)

G These simulations were run with a launch guide length of 4m (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.)

A The minimum altitude check is used to ensure that the rocket flies high enough to ensure time for a safe recovery. In addition, many barometric altimeters require a minimum altitude to detect lift-off. (The minimum altitude is 10m or 33ft for an A motor and doubles for each impulse class).

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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