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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 25 motors that fit and appear to have enough thrust (780 motors didn't fit, 6 motors failed safety checks). 31 motor had thrust curves available and 55 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:   Double Pumper Jr.
Owner: Jim Lane
Body Diameter: 2.60in
Dry Weight: 8.9oz
MMT Diameter: 24.0mm
MMT Length: 3.75in
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 Estes C11 10.1oz 48ft/s 75ft/s 6.7G 108ft 3.0s 2s
OK Estes D12 10.9oz 51ft/s 119ft/s 8.8G 287ft 4.7s 3s
OK Estes D11 10.5oz 50ft/s 125ft/s 8.0G 320ft 5.0s 3s
OK AeroTech D15 10.6oz 68ft/s 159ft/s 9.2G 384ft 4.9s 4s
OK Cesaroni E22 10.9oz 59ft/s 208ft/s 9.0G 501ft 5.5s 4s
OK Cesaroni E75 10.7oz 116ft/s 250ft/s 30.3G 516ft 5.2s 5s
OK Cesaroni E31 10.7oz 72ft/s 235ft/s 12.6G 554ft 5.6s 5s
OK Estes E12 11.0oz 60ft/s 177ft/s 9.8G 574ft 6.4s 4s
OK AeroTech E11 11.1oz 50ft/s 205ft/s 5.2G 708ft 6.8s 4s
OK Estes E30 10.6oz 83ft/s 297ft/s 15.7G 734ft 6.1s 5s
OK AeroTech E20 10.6oz 72ft/s 266ft/s 10.8G 764ft 6.4s 5s
OK AeroTech E18 11.0oz 67ft/s 270ft/s 9.2G 849ft 6.8s 5s
OK AeroTech E28 10.9oz 90ft/s 323ft/s 15.8G 850ft 6.5s 5s
OK AeroTech E30 10.6oz 89ft/s 328ft/s 15.4G 854ft 6.5s 5s
OK AeroTech E15 10.6oz 65ft/s 257ft/s 9.3G 866ft 7.0s 5s
OK AeroTech F44 10.6oz 101ft/s 385ft/s 20.8G 885ft 6.4s 5s
warningsW Apogee E6 10.5oz 48ft/s 141ft/s 5.9G 890ft 9.3s 3s
OK AeroTech F62 12.0oz 96ft/s 394ft/s 19.7G 931ft 6.6s 6s
OK AeroTech F12 11.3oz 55ft/s 266ft/s 6.4G 938ft 7.4s 4s
OK AeroTech F30 11.4oz 72ft/s 354ft/s 10.7G 977ft 7.0s 5s
OK AeroTech F63 11.8oz 100ft/s 412ft/s 21.0G 981ft 6.7s 6s
OK AeroTech F24 11.1oz 78ft/s 318ft/s 12.3G 1,020ft 7.2s 5s
OK AeroTech F39 11.0oz 96ft/s 383ft/s 18.4G 1,026ft 6.9s 6s
OK AeroTech F35 11.9oz 89ft/s 406ft/s 16.6G 1,138ft 7.2s 6s
OK AeroTech F32 11.2oz 91ft/s 399ft/s 18.0G 1,156ft 7.4s 5s

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 AeroTech D7 speed at end of launch guide too slow (37ft/s)
failedG AeroTech D9 speed at end of launch guide too slow (47ft/s)
failedG Estes E9 speed at end of launch guide too slow (41ft/s)
failedG AeroTech E7 speed at end of launch guide too slow (38ft/s)
failedG AeroTech E12 speed at end of launch guide too slow (48ft/s)
failedG AeroTech E6 speed at end of launch guide too slow (38ft/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.)

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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