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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 13 motors that fit and appear to have enough thrust (787 motors didn't fit, 5 motors failed safety checks). 18 motor had thrust curves available and 33 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:   Baby Bertha 002
Owner: T M Brehmer
Body Diameter: 1.64in
Dry Weight: 1.7oz
MMT Diameter: 18.0mm
MMT Length: 70.0mm
CD: 0.60

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 Quest A6 2.1oz 52ft/s 100ft/s 19.2G 130ft 2.9s 2s
warningsW Estes A8 2.2oz 48ft/s 94ft/s 14.7G 134ft 3.0s 2s
OK Estes B6 2.2oz 53ft/s 178ft/s 18.8G 324ft 4.2s 3s
warningsW Estes B4 2.4oz 55ft/s 168ft/s 17.6G 331ft 4.4s 3s
warningsW Quest B6 2.3oz 54ft/s 196ft/s 22.1G 344ft 4.3s 4s
warningsW Estes C5 2.6oz 64ft/s 244ft/s 29.7G 642ft 5.7s 4s
OK Quest C6 2.4oz 58ft/s 239ft/s 26.1G 646ft 5.8s 4s
warningsW Estes C6 2.5oz 54ft/s 256ft/s 18.0G 658ft 5.9s 4s
OK AeroTech D21 2.6oz 95ft/s 567ft/s 43.3G 970ft 5.7s 5s
OK AeroTech D10 2.6oz 71ft/s 480ft/s 32.0G 992ft 5.9s 5s
OK AeroTech D24 2.8oz 95ft/s 560ft/s 50.0G 993ft 5.9s 5s
OK AeroTech D13 2.8oz 72ft/s 469ft/s 27.5G 1,027ft 6.1s 5s
OK AeroTech D2 2.7oz 48ft/s 181ft/s 12.3G 1,366ft 11.1s 3s

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 Estes 1/2A6 speed at end of launch guide too slow (44ft/s)
failedG SCR A3 speed at end of launch guide too slow (39ft/s)
failedG SCR B4 speed at end of launch guide too slow (40ft/s)
failedG SCR C3 speed at end of launch guide too slow (37ft/s)
failedG AeroTech C3 speed at end of launch guide too slow (45ft/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.)

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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