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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 74 motors that fit and appear to have enough thrust (694 motors didn't fit, 23 motors failed safety checks). 95 motor had thrust curves available and 184 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:   Freefall 29mm
Owner: Jim Lane
Body Diameter: 4.00in
Dry Weight: 38.3oz
MMT Diameter: 29.0mm
MMT Length: 12.00in
CD: 0.43

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 AeroTech F62 42.1oz 48ft/s 116ft/s 4.4G 249ft 4.3s 3s
OK AeroTech F42 41.0oz 48ft/s 114ft/s 5.0G 272ft 4.5s 3s
OK Cesaroni F59 41.8oz 50ft/s 126ft/s 5.1G 281ft 4.5s 4s
OK Cesaroni F120 42.0oz 74ft/s 139ft/s 11.3G 286ft 4.4s 4s
OK AeroTech F50 41.3oz 51ft/s 149ft/s 5.3G 396ft 5.3s 4s
OK AeroTech F52 42.6oz 52ft/s 150ft/s 5.7G 417ft 5.5s 4s
warningsW Estes F50 41.2oz 54ft/s 166ft/s 5.9G 480ft 5.8s 4s
OK AeroTech G54 43.1oz 54ft/s 166ft/s 5.8G 488ft 5.9s 4s
OK Cesaroni G88 43.7oz 58ft/s 190ft/s 8.6G 529ft 5.9s 5s
OK AeroTech G104 43.1oz 68ft/s 195ft/s 9.2G 554ft 6.0s 5s
OK AeroTech G74 41.4oz 58ft/s 198ft/s 6.9G 569ft 6.2s 5s
OK AeroTech G53 43.4oz 54ft/s 180ft/s 6.1G 593ft 6.5s 5s
OK Cesaroni G80 43.4oz 55ft/s 211ft/s 7.2G 633ft 6.5s 5s
warningsW Estes G40 42.6oz 48ft/s 186ft/s 5.2G 670ft 6.9s 5s
OK AeroTech G40 42.6oz 48ft/s 186ft/s 5.2G 670ft 6.9s 5s
OK AeroTech G77 44.1oz 52ft/s 220ft/s 6.5G 691ft 6.9s 5s
OK AeroTech G77 42.6oz 55ft/s 230ft/s 7.3G 724ft 6.9s 6s
OK Cesaroni G68 43.8oz 50ft/s 223ft/s 6.5G 753ft 7.1s 5s
OK AeroTech G79 43.8oz 58ft/s 230ft/s 7.1G 755ft 7.0s 6s
OK AeroTech G79 42.7oz 51ft/s 224ft/s 5.9G 757ft 7.2s 5s
OK Cesaroni G57 43.4oz 54ft/s 213ft/s 6.3G 759ft 7.2s 5s
OK Cesaroni G83 43.4oz 59ft/s 234ft/s 7.3G 760ft 7.0s 6s
OK Cesaroni G250 43.3oz 101ft/s 278ft/s 23.0G 821ft 6.9s 6s
OK AeroTech G76 43.5oz 71ft/s 234ft/s 11.5G 848ft 7.3s 5s
OK Cesaroni G126 43.4oz 75ft/s 271ft/s 12.2G 868ft 7.2s 6s
OK AeroTech G64 43.6oz 61ft/s 230ft/s 7.9G 870ft 7.5s 5s
OK AeroTech G75 42.9oz 59ft/s 251ft/s 7.4G 899ft 7.6s 6s
OK Cesaroni G131 45.4oz 70ft/s 283ft/s 10.8G 927ft 7.5s 6s
OK AeroTech G78 42.7oz 58ft/s 263ft/s 7.6G 928ft 7.6s 6s
OK AeroTech G125 42.7oz 70ft/s 298ft/s 11.8G 975ft 7.5s 7s
OK AeroTech G80 42.8oz 61ft/s 275ft/s 7.8G 999ft 7.9s 6s
OK Cesaroni G106 44.9oz 59ft/s 302ft/s 9.5G 1,047ft 8.0s 7s
OK KBA G82 46.4oz 52ft/s 285ft/s 6.8G 1,065ft 8.2s 6s
OK KBA G135 46.3oz 66ft/s 320ft/s 11.2G 1,090ft 8.0s 7s
OK AeroTech G75 46.5oz 49ft/s 285ft/s 5.2G 1,132ft 8.7s 6s
OK Cesaroni G125 45.2oz 73ft/s 348ft/s 11.9G 1,259ft 8.5s 7s
OK Cesaroni G118 44.9oz 68ft/s 346ft/s 11.5G 1,260ft 8.5s 7s
OK Cesaroni G54 45.1oz 64ft/s 269ft/s 8.6G 1,260ft 9.0s 6s
OK AeroTech H165 45.4oz 83ft/s 363ft/s 14.1G 1,269ft 8.4s 7s
OK Cesaroni H175 47.0oz 83ft/s 373ft/s 16.6G 1,293ft 8.4s 7s
OK Cesaroni H133 45.0oz 75ft/s 357ft/s 14.3G 1,298ft 8.6s 7s
OK Cesaroni H54 45.7oz 56ft/s 278ft/s 7.0G 1,322ft 9.3s 6s
OK Cesaroni H90 44.0oz 67ft/s 340ft/s 11.7G 1,330ft 8.8s 7s
OK Cesaroni H87 45.5oz 59ft/s 336ft/s 9.1G 1,333ft 9.0s 7s
OK Cesaroni H163 44.9oz 81ft/s 379ft/s 16.4G 1,335ft 8.6s 7s
OK Cesaroni H410 44.7oz 130ft/s 416ft/s 41.0G 1,338ft 8.3s 8s
OK AeroTech G138 43.5oz 70ft/s 391ft/s 13.6G 1,359ft 8.6s 8s
OK AeroTech H128 45.6oz 80ft/s 375ft/s 13.4G 1,364ft 8.7s 7s
OK AeroTech H238 45.2oz 93ft/s 396ft/s 17.9G 1,386ft 8.6s 8s
OK Cesaroni H123 46.3oz 67ft/s 372ft/s 9.8G 1,387ft 8.9s 7s
OK AeroTech H115 45.5oz 64ft/s 373ft/s 8.8G 1,423ft 9.0s 7s
OK AeroTech H97 48.1oz 59ft/s 361ft/s 7.2G 1,456ft 9.3s 7s
OK Cesaroni H118 46.5oz 72ft/s 380ft/s 12.1G 1,484ft 9.1s 7s
OK Cesaroni H237 48.7oz 95ft/s 457ft/s 20.1G 1,607ft 9.1s 8s
OK AeroTech H220 47.1oz 96ft/s 456ft/s 22.4G 1,629ft 9.1s 8s
OK KBA H130 63.3oz 69ft/s 367ft/s 11.5G 1,633ft 9.8s 8s
OK Cesaroni H151 46.7oz 83ft/s 433ft/s 14.7G 1,653ft 9.3s 8s
OK AeroTech H210 47.0oz 93ft/s 463ft/s 18.8G 1,660ft 9.2s 8s
OK Cesaroni H135 47.2oz 74ft/s 439ft/s 11.6G 1,731ft 9.6s 8s
OK Cesaroni H170 46.5oz 88ft/s 459ft/s 17.4G 1,732ft 9.4s 8s
OK Cesaroni H160 47.9oz 77ft/s 459ft/s 12.9G 1,734ft 9.6s 8s
OK AeroTech H182 45.6oz 80ft/s 482ft/s 14.0G 1,746ft 9.5s 8s
OK AeroTech H180 47.2oz 91ft/s 482ft/s 18.5G 1,793ft 9.5s 8s
OK AeroTech H250 47.3oz 107ft/s 509ft/s 23.6G 1,818ft 9.5s 9s
OK AeroTech H135 45.8oz 72ft/s 445ft/s 11.1G 1,859ft 10.0s 8s
OK Cesaroni H53 48.4oz 49ft/s 343ft/s 6.0G 1,862ft 11.0s 7s
OK KBA H225 49.4oz 81ft/s 514ft/s 18.5G 1,874ft 9.8s 9s
OK AeroTech H195 45.2oz 94ft/s 524ft/s 19.2G 1,901ft 9.6s 8s
OK Cesaroni H194 48.3oz 90ft/s 523ft/s 20.0G 1,996ft 9.9s 9s
OK Cesaroni H200 48.0oz 93ft/s 531ft/s 20.8G 2,034ft 10.0s 9s
OK Cesaroni H140 48.1oz 88ft/s 500ft/s 17.4G 2,110ft 10.3s 8s
OK Cesaroni H255 46.5oz 111ft/s 587ft/s 28.1G 2,115ft 9.9s 9s
OK AeroTech I205 49.4oz 96ft/s 643ft/s 25.5G 2,559ft 10.8s 9s
warningsW,D Estes G80 42.7oz 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 (20ft/s)
failedG AeroTech E23 speed at end of launch guide too slow (32ft/s)
failedG AeroTech E16 speed at end of launch guide too slow (25ft/s)
failedG AeroTech F23 speed at end of launch guide too slow (35ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (36ft/s)
failedG AeroTech F27 speed at end of launch guide too slow (33ft/s)
failedG Estes F15 speed at end of launch guide too slow (16ft/s)
failedG AeroTech F37 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (36ft/s)
failedG AeroTech F20 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni F32 speed at end of launch guide too slow (32ft/s)
failedG Cesaroni F29 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni F31 speed at end of launch guide too slow (33ft/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 (32ft/s)
failedG AeroTech F22 speed at end of launch guide too slow (28ft/s)
failedG Apogee F10 speed at end of launch guide too slow (20ft/s)
failedG AeroTech F25 speed at end of launch guide too slow (43ft/s)
failedG AeroTech F40 speed at end of launch guide too slow (47ft/s)
failedG AeroTech G38 speed at end of launch guide too slow (39ft/s)
failedG AeroTech G25 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni G33 speed at end of launch guide too slow (33ft/s)
failedG Cesaroni H42 speed at end of launch guide too slow (40ft/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.)

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.

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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