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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 20 motors that fit and appear to have enough thrust (789 motors didn't fit, 2 motors failed safety checks). 22 motor had thrust curves available and 43 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
Owner: Kevin Katz
Body Diameter: 1.64in
Dry Weight: 62g
MMT Diameter: 18.0mm
MMT Length: 3.00in
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 Quest A6 74g 60ft/s 79ft/s 15.4G 92ft 2.5s 2s
OK Estes A8 78g 49ft/s 73ft/s 11.7G 93ft 2.6s 2s
OK SCR A3 77g 52ft/s 83ft/s 10.6G 108ft 2.9s 2s
OK Estes B6 81g 59ft/s 137ft/s 14.4G 243ft 3.9s 3s
OK Estes B4 81g 58ft/s 138ft/s 14.5G 260ft 4.1s 3s
OK SCR B4 81g 56ft/s 130ft/s 14.1G 267ft 4.1s 3s
OK Quest B6 80g 63ft/s 156ft/s 17.5G 268ft 4.0s 3s
OK Quest B4 82g 48ft/s 140ft/s 7.8G 280ft 4.2s 3s
OK Estes C5 87g 79ft/s 185ft/s 23.8G 506ft 5.4s 4s
OK Quest C12 86g 60ft/s 312ft/s 15.6G 539ft 5.0s 4s
OK Quest C6 83g 74ft/s 203ft/s 21.6G 542ft 5.5s 4s
OK Estes C6 86g 58ft/s 214ft/s 14.7G 550ft 5.6s 4s
OK AeroTech C3 86g 54ft/s 156ft/s 9.7G 555ft 5.9s 3s
OK SCR C3 87g 50ft/s 174ft/s 13.0G 596ft 6.2s 3s
OK Quest D16 88g 71ft/s 385ft/s 20.3G 633ft 5.2s 4s
OK AeroTech D21 87g 100ft/s 490ft/s 36.2G 860ft 5.5s 5s
OK AeroTech D10 88g 81ft/s 414ft/s 26.8G 873ft 5.7s 4s
OK AeroTech D24 94g 114ft/s 486ft/s 42.5G 874ft 5.7s 5s
OK AeroTech D13 94g 86ft/s 408ft/s 23.4G 900ft 5.9s 4s
OK AeroTech D2 91g 55ft/s 152ft/s 10.3G 1,131ft 10.7s 3s

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 (40ft/s)
failedG Quest A3 speed at end of launch guide too slow (42ft/s)

G These simulations were run with a launch guide length of 5ft (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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