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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 33 motors that fit and appear to have enough thrust (717 motors didn't fit, 41 motors failed safety checks). 72 motor had thrust curves available and 139 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:   Caffeine Monster
Owner: David Todd
Body Diameter: 9.00in
Dry Weight: 38.0oz
MMT Diameter: 29.0mm
MMT Length: 8.00in
CD: 1.00

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 Cesaroni G80 43.1oz 48ft/s 152ft/s 7.2G 226ft 3.5s 2s
OK AeroTech G53 43.1oz 49ft/s 121ft/s 6.2G 231ft 3.7s 2s
OK Cesaroni G250 43.0oz 87ft/s 229ft/s 19.9G 232ft 3.2s 3s
OK AeroTech G77 42.3oz 50ft/s 157ft/s 6.1G 243ft 3.6s 2s
OK AeroTech G79 43.5oz 50ft/s 154ft/s 6.6G 254ft 3.7s 2s
OK Cesaroni G83 43.1oz 53ft/s 158ft/s 7.3G 254ft 3.7s 2s
OK Cesaroni G126 43.1oz 64ft/s 192ft/s 12.2G 260ft 3.5s 3s
OK Cesaroni G131 45.1oz 60ft/s 201ft/s 10.8G 275ft 3.6s 2s
OK AeroTech G125 42.4oz 62ft/s 205ft/s 9.9G 275ft 3.5s 2s
OK AeroTech G76 43.2oz 64ft/s 150ft/s 11.5G 277ft 3.7s 2s
OK AeroTech G78 42.4oz 52ft/s 167ft/s 7.0G 287ft 3.8s 2s
OK AeroTech G75 42.6oz 51ft/s 153ft/s 7.5G 288ft 3.9s 2s
OK AeroTech G64 43.3oz 56ft/s 143ft/s 8.0G 291ft 4.0s 2s
OK Cesaroni H410 44.4oz 118ft/s 321ft/s 34.3G 296ft 3.3s 3s
OK AeroTech G80 42.5oz 54ft/s 167ft/s 7.8G 302ft 3.9s 2s
OK KBA G135 46.0oz 59ft/s 216ft/s 10.2G 304ft 3.7s 3s
OK Cesaroni G106 44.6oz 54ft/s 195ft/s 9.6G 305ft 3.8s 2s
OK AeroTech H165 45.1oz 73ft/s 232ft/s 12.8G 325ft 3.7s 3s
OK AeroTech H238 44.9oz 82ft/s 259ft/s 16.3G 336ft 3.6s 3s
OK Cesaroni H163 44.6oz 72ft/s 241ft/s 16.5G 336ft 3.7s 3s
OK Cesaroni G125 44.9oz 65ft/s 209ft/s 11.9G 337ft 3.9s 3s
OK AeroTech G138 43.2oz 62ft/s 246ft/s 9.9G 338ft 3.8s 3s
OK Cesaroni G118 44.6oz 61ft/s 207ft/s 11.6G 341ft 3.9s 3s
OK Cesaroni H133 44.7oz 67ft/s 215ft/s 14.4G 342ft 3.8s 3s
OK AeroTech H128 45.3oz 71ft/s 225ft/s 12.8G 350ft 3.9s 3s
OK Cesaroni H90 43.7oz 61ft/s 178ft/s 11.7G 369ft 4.2s 2s
OK AeroTech H115 45.2oz 58ft/s 204ft/s 8.5G 378ft 4.1s 2s
OK Cesaroni H87 45.2oz 54ft/s 174ft/s 9.2G 378ft 4.4s 2s
OK Cesaroni G54 44.8oz 56ft/s 143ft/s 8.5G 393ft 4.8s 2s
OK AeroTech H182 45.3oz 71ft/s 263ft/s 12.9G 405ft 4.0s 3s
OK Cesaroni H54 45.4oz 50ft/s 140ft/s 7.0G 415ft 5.0s 2s
OK AeroTech H195 44.9oz 87ft/s 279ft/s 19.3G 422ft 3.9s 3s
warningsW,D Estes G80 42.4oz 7:1 thrust/weight ratio (no data)

W Motor total weight unknown, lift-off Weight not accurate.

D No simulation data found for this motor.

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 Estes E16 speed at end of launch guide too slow (18ft/s)
failedG AeroTech E23 speed at end of launch guide too slow (29ft/s)
failedG AeroTech E16 speed at end of launch guide too slow (23ft/s)
failedG AeroTech F23 speed at end of launch guide too slow (31ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (32ft/s)
failedG AeroTech F27 speed at end of launch guide too slow (29ft/s)
failedG Estes F15 speed at end of launch guide too slow (15ft/s)
failedG AeroTech F37 speed at end of launch guide too slow (32ft/s)
failedG AeroTech F62 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (32ft/s)
failedG AeroTech F20 speed at end of launch guide too slow (32ft/s)
failedG Cesaroni F32 speed at end of launch guide too slow (28ft/s)
failedG AeroTech F42 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni F29 speed at end of launch guide too slow (27ft/s)
failedG Cesaroni F31 speed at end of launch guide too slow (30ft/s)
failedA Cesaroni F120 rocket doesn't reach a safe altitude (133ft)
failedG Cesaroni F59 speed at end of launch guide too slow (45ft/s)
failed5 Estes F26 average thrust fails 5:1 thrust/weight ratio (2:1)
failedG AeroTech F26 speed at end of launch guide too slow (28ft/s)
failedG AeroTech F22 speed at end of launch guide too slow (25ft/s)
failedG AeroTech F52 speed at end of launch guide too slow (47ft/s)
failedG Apogee F10 speed at end of launch guide too slow (19ft/s)
failedG AeroTech F50 speed at end of launch guide too slow (45ft/s)
failedA Estes F50 rocket doesn't reach a safe altitude (196ft)
failedG AeroTech F25 speed at end of launch guide too slow (39ft/s)
failedG AeroTech F40 speed at end of launch guide too slow (42ft/s)
failedG AeroTech G54 speed at end of launch guide too slow (47ft/s)
failedA AeroTech G104 rocket doesn't reach a safe altitude (204ft)
failedA AeroTech G74 rocket doesn't reach a safe altitude (209ft)
failedA Cesaroni G88 rocket doesn't reach a safe altitude (201ft)
failedG AeroTech G38 speed at end of launch guide too slow (35ft/s)
failedG Estes G40 speed at end of launch guide too slow (43ft/s)
failedG AeroTech G77 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni G57 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni G68 speed at end of launch guide too slow (45ft/s)
failedG AeroTech G79 speed at end of launch guide too slow (45ft/s)
failedG AeroTech G40 speed at end of launch guide too slow (43ft/s)
failedG AeroTech G25 speed at end of launch guide too slow (31ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (43ft/s)
failedG KBA G82 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni G33 speed at end of launch guide too slow (29ft/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.)

5 The 5:1 thrust-to-weight ratio check is a useful rule of thumb, but it does break down for motors with unusual thrust curves. For example, motors with a high initial thrust and a long tail-off may fail this test but still be safe for use.

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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