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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 29 motors that fit and appear to have enough thrust (710 motors didn't fit, 63 motors failed safety checks). 90 motor had thrust curves available and 182 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:   3 inch MC SDCR fg Twitch 29mm
Owner: Kenneth B Weaver
Body Diameter: 3.00in
Dry Weight: 57.0oz
MMT Diameter: 29.0mm
MMT Length: 10.00in
CD: 0.65

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 G76 62.2oz 52ft/s 159ft/s 7.7G 518ft 6.1s 4s
OK Cesaroni G250 62.0oz 73ft/s 191ft/s 15.8G 523ft 5.8s 5s
OK Cesaroni G126 62.1oz 52ft/s 185ft/s 8.2G 546ft 6.1s 5s
OK Cesaroni G131 64.1oz 50ft/s 195ft/s 7.7G 598ft 6.4s 5s
OK AeroTech G125 61.4oz 51ft/s 204ft/s 8.1G 634ft 6.5s 6s
OK KBA G135 65.0oz 49ft/s 224ft/s 7.8G 740ft 7.1s 6s
OK Cesaroni G118 63.6oz 48ft/s 242ft/s 7.8G 889ft 7.7s 6s
OK Cesaroni G125 63.9oz 53ft/s 245ft/s 8.1G 895ft 7.7s 6s
OK AeroTech H165 64.1oz 60ft/s 256ft/s 9.8G 918ft 7.7s 7s
OK Cesaroni H133 63.7oz 53ft/s 252ft/s 9.8G 935ft 7.8s 7s
OK Cesaroni H175 65.7oz 57ft/s 264ft/s 12.1G 949ft 7.8s 7s
OK Cesaroni H163 63.6oz 58ft/s 267ft/s 11.3G 983ft 7.9s 7s
OK AeroTech G138 62.2oz 51ft/s 273ft/s 10.0G 999ft 8.0s 7s
OK AeroTech H128 64.3oz 58ft/s 266ft/s 9.2G 1,009ft 8.1s 7s
OK Cesaroni H410 63.4oz 97ft/s 293ft/s 28.7G 1,021ft 7.7s 7s
OK AeroTech H238 63.9oz 68ft/s 282ft/s 12.5G 1,048ft 8.0s 7s
OK Cesaroni H118 65.2oz 52ft/s 274ft/s 8.4G 1,124ft 8.5s 7s
OK Cesaroni H151 65.4oz 61ft/s 315ft/s 10.2G 1,317ft 9.0s 8s
OK AeroTech H220 65.8oz 70ft/s 330ft/s 15.8G 1,317ft 8.9s 8s
OK AeroTech H210 65.7oz 67ft/s 335ft/s 13.3G 1,346ft 9.0s 8s
OK Cesaroni H135 65.9oz 53ft/s 321ft/s 8.0G 1,388ft 9.4s 8s
OK Cesaroni H170 65.2oz 65ft/s 334ft/s 12.1G 1,415ft 9.2s 8s
OK AeroTech H182 64.3oz 58ft/s 347ft/s 9.8G 1,431ft 9.3s 8s
OK AeroTech H180 65.9oz 64ft/s 352ft/s 13.0G 1,496ft 9.4s 8s
OK AeroTech H135 64.5oz 52ft/s 329ft/s 7.6G 1,511ft 9.8s 8s
OK AeroTech H250 66.0oz 80ft/s 372ft/s 16.6G 1,540ft 9.4s 8s
OK AeroTech H195 63.9oz 69ft/s 382ft/s 13.3G 1,632ft 9.8s 9s
OK Cesaroni H255 65.2oz 80ft/s 435ft/s 19.7G 1,913ft 10.3s 9s
warningsW,D Estes G80 61.4oz 5:1 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 (7ft/s)
failedG AeroTech E23 speed at end of launch guide too slow (20ft/s)
failedG AeroTech E16 speed at end of launch guide too slow (13ft/s)
failedG AeroTech F23 speed at end of launch guide too slow (22ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (23ft/s)
failedG AeroTech F27 speed at end of launch guide too slow (21ft/s)
failed5 Estes F15 average thrust fails 5:1 thrust/weight ratio (1:1)
failedG AeroTech F37 speed at end of launch guide too slow (25ft/s)
failedG AeroTech F62 speed at end of launch guide too slow (33ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (24ft/s)
failedG AeroTech F20 speed at end of launch guide too slow (24ft/s)
failedG Cesaroni F32 speed at end of launch guide too slow (20ft/s)
failedG AeroTech F42 speed at end of launch guide too slow (32ft/s)
failedG Cesaroni F29 speed at end of launch guide too slow (19ft/s)
failedG Cesaroni F31 speed at end of launch guide too slow (21ft/s)
failedA Cesaroni F120 rocket doesn't reach a safe altitude (144ft)
failedG Cesaroni F59 speed at end of launch guide too slow (34ft/s)
failedG AeroTech F67 speed at end of launch guide too slow (40ft/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 (20ft/s)
failedG AeroTech F22 speed at end of launch guide too slow (17ft/s)
failedG AeroTech F52 speed at end of launch guide too slow (37ft/s)
failedG Apogee F10 speed at end of launch guide too slow (6ft/s)
failedG AeroTech F50 speed at end of launch guide too slow (35ft/s)
failedG Estes F50 speed at end of launch guide too slow (37ft/s)
failedG AeroTech F25 speed at end of launch guide too slow (29ft/s)
failedG AeroTech F40 speed at end of launch guide too slow (32ft/s)
failedG AeroTech G54 speed at end of launch guide too slow (36ft/s)
failedG AeroTech G104 speed at end of launch guide too slow (47ft/s)
failedG AeroTech G74 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni G88 speed at end of launch guide too slow (41ft/s)
failedG AeroTech G38 speed at end of launch guide too slow (26ft/s)
failedG AeroTech G53 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni G80 speed at end of launch guide too slow (38ft/s)
failedG Estes G40 speed at end of launch guide too slow (33ft/s)
failedG AeroTech G77 speed at end of launch guide too slow (39ft/s)
failedG AeroTech G77 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni G83 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni G57 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni G68 speed at end of launch guide too slow (36ft/s)
failedG AeroTech G79 speed at end of launch guide too slow (36ft/s)
failedG AeroTech G79 speed at end of launch guide too slow (40ft/s)
failedG AeroTech G78 speed at end of launch guide too slow (41ft/s)
failedG AeroTech G40 speed at end of launch guide too slow (33ft/s)
failedG AeroTech G25 speed at end of launch guide too slow (23ft/s)
failedG AeroTech G64 speed at end of launch guide too slow (44ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (41ft/s)
failedG AeroTech G80 speed at end of launch guide too slow (43ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (34ft/s)
failed5 AeroTech G8 average thrust fails 5:1 thrust/weight ratio (0:1)
failedG Cesaroni G106 speed at end of launch guide too slow (43ft/s)
failedG AeroTech G11 speed at end of launch guide too slow (8ft/s)
failedG AeroTech G12 speed at end of launch guide too slow (10ft/s)
failedG KBA G82 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni G33 speed at end of launch guide too slow (21ft/s)
failedG Cesaroni G54 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni H90 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni H54 speed at end of launch guide too slow (39ft/s)
failedG Cesaroni H87 speed at end of launch guide too slow (42ft/s)
failedG AeroTech H115 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni H123 speed at end of launch guide too slow (47ft/s)
failedG AeroTech H97 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni H42 speed at end of launch guide too slow (28ft/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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