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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 49 motors that fit and appear to have enough thrust (639 motors didn't fit, 103 motors failed safety checks). 152 motor had thrust curves available and 316 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: Donald Wheelis
Body Diameter: 3.00in
Dry Weight: 6.50lb
MMT Diameter: 38.0mm
MMT Length: 20.00in
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 Contrail H300 7.85lb 59ft/s 130ft/s 19.5G 305ft 4.5s 4s
OK Contrail H303 7.80lb 64ft/s 140ft/s 21.4G 346ft 4.8s 4s
OK Contrail H246 7.82lb 48ft/s 177ft/s 14.3G 548ft 6.0s 5s
OK AeroTech H669 7.06lb 66ft/s 217ft/s 34.2G 672ft 6.5s 6s
OK AeroTech H550 7.21lb 60ft/s 298ft/s 19.2G 1,184ft 8.5s 8s
OK AeroTech H550 7.20lb 60ft/s 300ft/s 19.3G 1,194ft 8.5s 8s
warningsW Cesaroni H565 7.30lb 57ft/s 303ft/s 19.2G 1,207ft 8.6s 8s
OK AeroTech H999 7.23lb 78ft/s 314ft/s 49.0G 1,239ft 8.6s 8s
OK Cesaroni I566 7.35lb 53ft/s 349ft/s 18.4G 1,509ft 9.5s 9s
OK Cesaroni I800 7.51lb 66ft/s 393ft/s 26.5G 1,770ft 10.2s 10s
OK AeroTech I1299 7.43lb 89ft/s 410ft/s 45.2G 1,850ft 10.2s 10s
OK Loki I316 7.69lb 49ft/s 390ft/s 13.7G 2,029ft 11.1s 10s
OK Loki I405 7.70lb 66ft/s 425ft/s 22.5G 2,205ft 11.3s 10s
OK Loki I377 7.73lb 56ft/s 435ft/s 18.1G 2,341ft 11.7s 10s
OK Loki I430 7.69lb 49ft/s 453ft/s 14.6G 2,346ft 11.8s 11s
OK AeroTech I366 7.72lb 49ft/s 450ft/s 13.2G 2,420ft 12.0s 10s
OK Cesaroni I470 7.59lb 52ft/s 476ft/s 15.5G 2,481ft 12.0s 11s
OK AeroTech I435 7.64lb 63ft/s 491ft/s 21.2G 2,663ft 12.3s 11s
OK AeroTech I284 7.72lb 48ft/s 477ft/s 13.2G 2,714ft 12.6s 11s
OK KBA I550 8.07lb 55ft/s 531ft/s 18.7G 2,735ft 12.3s 11s
OK AeroTech I500 7.77lb 50ft/s 531ft/s 15.7G 2,930ft 12.8s 12s
warningsW Cesaroni I540 7.82lb 58ft/s 550ft/s 17.3G 2,996ft 12.9s 12s
OK AeroTech I600 7.83lb 64ft/s 550ft/s 22.5G 3,016ft 12.9s 12s
OK AeroTech J420 7.93lb 51ft/s 534ft/s 14.8G 3,029ft 13.1s 12s
OK Cesaroni J381 8.02lb 49ft/s 530ft/s 13.2G 3,051ft 13.2s 11s
OK AeroTech J350 7.97lb 63ft/s 537ft/s 22.2G 3,072ft 13.1s 12s
OK AeroTech J340 7.77lb 52ft/s 529ft/s 16.4G 3,077ft 13.2s 11s
OK KBA J740 8.10lb 66ft/s 574ft/s 26.0G 3,086ft 12.9s 12s
OK Cesaroni J357 7.82lb 49ft/s 538ft/s 13.8G 3,107ft 13.3s 12s
OK Cesaroni J400 8.05lb 48ft/s 563ft/s 12.5G 3,281ft 13.6s 12s
OK AeroTech J520 8.20lb 69ft/s 577ft/s 27.1G 3,339ft 13.5s 12s
OK AeroTech J500 7.94lb 59ft/s 600ft/s 21.4G 3,450ft 13.7s 12s
OK Loki J528 8.14lb 67ft/s 616ft/s 27.2G 3,509ft 13.7s 12s
OK Cesaroni J330 8.05lb 49ft/s 586ft/s 11.9G 3,641ft 14.4s 12s
OK AeroTech J575 8.52lb 66ft/s 634ft/s 22.3G 3,661ft 13.9s 13s
OK Cesaroni J410 8.12lb 50ft/s 612ft/s 13.1G 3,680ft 14.3s 12s
OK AeroTech J435 7.88lb 60ft/s 629ft/s 18.7G 3,732ft 14.2s 12s
OK Cesaroni J425 8.04lb 55ft/s 621ft/s 17.7G 3,739ft 14.2s 12s
OK Loki J712 8.16lb 63ft/s 666ft/s 23.2G 3,796ft 14.1s 13s
OK Cesaroni J354 8.22lb 51ft/s 614ft/s 13.2G 3,881ft 14.7s 12s
OK Cesaroni J520 8.37lb 54ft/s 669ft/s 16.6G 3,976ft 14.6s 13s
OK Cesaroni J580 8.80lb 56ft/s 688ft/s 17.0G 4,104ft 14.8s 13s
OK AeroTech J825 8.43lb 69ft/s 791ft/s 30.4G 4,523ft 15.0s 14s
OK Cesaroni J595 8.41lb 59ft/s 764ft/s 23.3G 4,652ft 15.4s 14s
OK Cesaroni J600 8.50lb 61ft/s 779ft/s 18.2G 4,683ft 15.4s 14s
OK Cesaroni J453 8.63lb 56ft/s 735ft/s 17.9G 4,750ft 15.7s 13s
OK Cesaroni J420 8.43lb 58ft/s 726ft/s 19.9G 4,757ft 15.7s 13s
OK AeroTech J570 8.49lb 69ft/s 752ft/s 29.5G 4,819ft 15.5s 13s
OK Cesaroni J530 8.65lb 61ft/s 809ft/s 19.9G 5,177ft 16.0s 14s

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 Contrail G130 speed at end of launch guide too slow (33ft/s)
failedG AeroTech G339 speed at end of launch guide too slow (47ft/s)
failedG AeroTech G67 speed at end of launch guide too slow (19ft/s)
failedG Loki G69 speed at end of launch guide too slow (20ft/s)
failedG AeroTech G61 speed at end of launch guide too slow (17ft/s)
failedA Contrail G234 rocket doesn't reach a safe altitude (169ft)
failedG Loki G70 speed at end of launch guide too slow (21ft/s)
failedG Loki G94 speed at end of launch guide too slow (24ft/s)
failedG Cesaroni G69 speed at end of launch guide too slow (17ft/s)
failedG Loki G80 speed at end of launch guide too slow (22ft/s)
failedG Cesaroni G46 speed at end of launch guide too slow (13ft/s)
failedG Cesaroni G185 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni G79 speed at end of launch guide too slow (17ft/s)
failedG Loki G66 speed at end of launch guide too slow (23ft/s)
failedG Cesaroni G60 speed at end of launch guide too slow (18ft/s)
failedG AeroTech G69 speed at end of launch guide too slow (17ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (13ft/s)
failedG Cesaroni G115 speed at end of launch guide too slow (23ft/s)
failedG Cesaroni G78 speed at end of launch guide too slow (18ft/s)
failedG Contrail G123 speed at end of launch guide too slow (31ft/s)
failedG Contrail G100 speed at end of launch guide too slow (29ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (12ft/s)
failedA Contrail G300 rocket doesn't reach a safe altitude (127ft)
failedG Contrail H222 speed at end of launch guide too slow (47ft/s)
failedG AeroTech H73 speed at end of launch guide too slow (17ft/s)
failedG Loki H100 speed at end of launch guide too slow (25ft/s)
failedG AeroTech H283 speed at end of launch guide too slow (42ft/s)
failedG AeroTech H148 speed at end of launch guide too slow (30ft/s)
failedG AeroTech H130 speed at end of launch guide too slow (36ft/s)
failedG AeroTech H123 speed at end of launch guide too slow (26ft/s)
failedG AeroTech H100 speed at end of launch guide too slow (23ft/s)
failedG AeroTech H242 speed at end of launch guide too slow (35ft/s)
failedG Cesaroni H123 speed at end of launch guide too slow (23ft/s)
failedG AeroTech H219 speed at end of launch guide too slow (40ft/s)
failedG Loki H90 speed at end of launch guide too slow (26ft/s)
failedG Loki H144 speed at end of launch guide too slow (36ft/s)
failedG Loki H125 speed at end of launch guide too slow (31ft/s)
failedG Contrail H141 speed at end of launch guide too slow (36ft/s)
failedG Cesaroni H143 speed at end of launch guide too slow (25ft/s)
failedG Cesaroni H400 speed at end of launch guide too slow (45ft/s)
failedG Loki H160 speed at end of launch guide too slow (39ft/s)
failedG Cesaroni H120 speed at end of launch guide too slow (25ft/s)
failedG AeroTech H112 speed at end of launch guide too slow (20ft/s)
failedG Cesaroni H110 speed at end of launch guide too slow (22ft/s)
failedG Cesaroni H225 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni H152 speed at end of launch guide too slow (28ft/s)
failedG AeroTech H178 speed at end of launch guide too slow (28ft/s)
failedG Cesaroni H125 speed at end of launch guide too slow (24ft/s)
failedG Cesaroni H100 speed at end of launch guide too slow (23ft/s)
failedG AeroTech H170 speed at end of launch guide too slow (31ft/s)
failedG AeroTech H45 speed at end of launch guide too slow (17ft/s)
failedG AeroTech I180 speed at end of launch guide too slow (43ft/s)
failedG AeroTech I161 speed at end of launch guide too slow (32ft/s)
failedG AeroTech I218 speed at end of launch guide too slow (38ft/s)
failedG AeroTech I140 speed at end of launch guide too slow (29ft/s)
failedG Cesaroni I180 speed at end of launch guide too slow (29ft/s)
failedG AeroTech I357 speed at end of launch guide too slow (45ft/s)
failedG AeroTech I245 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni I212 speed at end of launch guide too slow (30ft/s)
failedG AeroTech I225 speed at end of launch guide too slow (32ft/s)
failedG Cesaroni I195 speed at end of launch guide too slow (32ft/s)
failedG AeroTech I154 speed at end of launch guide too slow (26ft/s)
failedG Cesaroni I170 speed at end of launch guide too slow (31ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (12ft/s)
failedG Cesaroni I55 speed at end of launch guide too slow (14ft/s)
failedG Cesaroni I345 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni I175 speed at end of launch guide too slow (29ft/s)
failedG Cesaroni I236 speed at end of launch guide too slow (37ft/s)
failedG AeroTech I285 speed at end of launch guide too slow (41ft/s)
failedG AeroTech I195 speed at end of launch guide too slow (40ft/s)
failedG AeroTech I300 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni I223 speed at end of launch guide too slow (34ft/s)
failedG AeroTech I211 speed at end of launch guide too slow (38ft/s)
failedG AeroTech I305 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni I287 speed at end of launch guide too slow (37ft/s)
failedG AeroTech I59 speed at end of launch guide too slow (25ft/s)
failedG Loki I110 speed at end of launch guide too slow (28ft/s)
failedG Loki I210 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni I285 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni I255 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni I303 speed at end of launch guide too slow (42ft/s)
failedG AeroTech I327 speed at end of launch guide too slow (45ft/s)
failedG AMW I297 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni I242 speed at end of launch guide too slow (37ft/s)
failedG KBA I301 speed at end of launch guide too slow (41ft/s)
failedG AeroTech I280 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni I125 speed at end of launch guide too slow (32ft/s)
failedG AeroTech I364 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni I350 speed at end of launch guide too slow (43ft/s)
failedG AeroTech I350 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni I216 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni J94 speed at end of launch guide too slow (24ft/s)
failedG Cesaroni J285 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni J335 speed at end of launch guide too slow (46ft/s)
failedG Loki J396 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni J270 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni J316 speed at end of launch guide too slow (45ft/s)
failedG AeroTech J425 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni J290 speed at end of launch guide too slow (42ft/s)
failedG AeroTech J270 speed at end of launch guide too slow (42ft/s)
failedG Loki J320 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni J150 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni J394 speed at end of launch guide too slow (43ft/s)

G These simulations were run with a launch guide length of 3ft (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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