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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 72 motors that fit and appear to have enough thrust (719 motors didn't fit). All motors had thrust curves available and 153 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:   Big Daddy 38mm
Owner: Jim Lane
Body Diameter: 3.00in
Dry Weight: 20.0oz
MMT Diameter: 38.0mm
MMT Length: 10.00in
CD: 0.46

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 Loki G69 28.5oz 76ft/s 366ft/s 11.4G 1,446ft 9.0s 7s
OK AeroTech G67 27.1oz 72ft/s 391ft/s 11.0G 1,496ft 9.2s 8s
OK AeroTech G61 26.8oz 68ft/s 372ft/s 9.8G 1,498ft 9.2s 7s
OK AeroTech G339 26.4oz 164ft/s 478ft/s 50.7G 1,514ft 8.6s 8s
OK Loki G70 28.5oz 77ft/s 384ft/s 11.8G 1,559ft 9.3s 8s
OK Loki G80 29.0oz 83ft/s 395ft/s 13.0G 1,564ft 9.2s 8s
OK Loki G94 28.5oz 89ft/s 421ft/s 15.6G 1,618ft 9.2s 8s
OK Cesaroni G46 26.9oz 59ft/s 376ft/s 10.8G 1,709ft 10.1s 7s
OK Cesaroni G185 26.6oz 109ft/s 521ft/s 26.6G 1,715ft 9.1s 8s
OK Cesaroni G79 28.0oz 66ft/s 454ft/s 10.6G 1,735ft 9.7s 8s
OK Cesaroni G69 26.9oz 69ft/s 430ft/s 10.6G 1,750ft 9.8s 8s
OK Loki G66 28.8oz 81ft/s 415ft/s 13.5G 1,782ft 9.8s 8s
OK AeroTech G69 27.1oz 68ft/s 462ft/s 9.7G 1,849ft 9.9s 8s
OK Cesaroni G58 27.5oz 59ft/s 429ft/s 10.7G 1,863ft 10.2s 8s
OK Cesaroni G60 27.3oz 71ft/s 453ft/s 10.3G 1,891ft 10.1s 8s
OK Cesaroni G115 26.9oz 89ft/s 524ft/s 16.6G 1,901ft 9.7s 8s
OK Cesaroni G78 26.9oz 70ft/s 486ft/s 16.4G 1,941ft 10.1s 8s
OK Cesaroni G50 27.7oz 53ft/s 434ft/s 8.1G 2,050ft 10.9s 8s
OK AeroTech H73 30.9oz 63ft/s 504ft/s 8.9G 2,354ft 11.2s 8s
warningsW AeroTech H283 28.7oz 142ft/s 736ft/s 41.1G 2,417ft 10.1s 9s
OK Loki H100 31.8oz 85ft/s 575ft/s 14.9G 2,449ft 10.8s 9s
OK AeroTech H669 28.9oz 221ft/s 875ft/s 137.2G 2,552ft 10.1s 10s
OK AeroTech H130 28.4oz 122ft/s 656ft/s 32.0G 2,563ft 10.5s 9s
OK AeroTech H148 30.9oz 100ft/s 664ft/s 21.7G 2,583ft 10.8s 9s
OK AeroTech H219 29.2oz 129ft/s 812ft/s 35.4G 2,700ft 10.5s 9s
OK AeroTech H123 29.7oz 89ft/s 638ft/s 17.1G 2,783ft 11.2s 9s
OK Loki H144 31.9oz 114ft/s 688ft/s 27.1G 2,789ft 11.0s 9s
OK AeroTech H100 29.2oz 83ft/s 647ft/s 14.6G 2,804ft 11.2s 9s
OK Cesaroni H123 30.5oz 82ft/s 721ft/s 16.1G 2,825ft 11.3s 9s
OK Cesaroni H143 32.2oz 83ft/s 734ft/s 16.6G 2,831ft 11.3s 10s
OK Cesaroni H400 30.0oz 147ft/s 945ft/s 52.6G 2,848ft 10.6s 10s
OK Loki H125 32.1oz 104ft/s 659ft/s 22.1G 2,848ft 11.3s 9s
OK AeroTech H242 29.3oz 116ft/s 800ft/s 28.1G 2,854ft 10.9s 9s
OK Loki H90 31.8oz 87ft/s 607ft/s 15.6G 2,873ft 11.6s 9s
OK Loki H160 31.8oz 127ft/s 739ft/s 31.7G 2,915ft 11.1s 10s
OK Cesaroni H225 26.8oz 129ft/s 981ft/s 33.6G 3,028ft 10.7s 9s
OK Cesaroni H120 30.4oz 86ft/s 750ft/s 16.6G 3,073ft 11.6s 9s
OK AeroTech H112 33.4oz 72ft/s 634ft/s 10.9G 3,114ft 12.2s 9s
OK Cesaroni H125 30.3oz 82ft/s 785ft/s 16.4G 3,121ft 11.6s 10s
OK AeroTech H550 31.1oz 194ft/s 1,121ft/s 75.8G 3,132ft 10.7s 10s
OK AeroTech H178 31.4oz 96ft/s 871ft/s 22.6G 3,135ft 11.3s 10s
OK Cesaroni H110 31.5oz 76ft/s 731ft/s 12.7G 3,158ft 11.9s 9s
OK Cesaroni H152 30.5oz 100ft/s 821ft/s 24.1G 3,168ft 11.5s 10s
OK AeroTech H999 31.7oz 255ft/s 1,176ft/s 182.3G 3,192ft 10.8s 11s
OK AeroTech H550 31.4oz 192ft/s 1,098ft/s 74.4G 3,193ft 10.9s 10s
warningsW Cesaroni H565 32.8oz 180ft/s 1,111ft/s 68.6G 3,224ft 11.0s 10s
OK Cesaroni H100 31.5oz 81ft/s 734ft/s 12.5G 3,340ft 12.2s 9s
OK AeroTech I218 33.1oz 120ft/s 908ft/s 30.3G 3,344ft 11.5s 10s
OK AeroTech H170 31.6oz 106ft/s 882ft/s 21.7G 3,399ft 11.6s 10s
OK AeroTech I180 33.6oz 141ft/s 828ft/s 38.0G 3,420ft 11.6s 10s
OK AeroTech I357 32.1oz 143ft/s 1,029ft/s 41.7G 3,503ft 11.4s 10s
OK AeroTech I245 32.9oz 147ft/s 955ft/s 44.3G 3,505ft 11.5s 10s
OK AeroTech I161 32.9oz 105ft/s 853ft/s 22.8G 3,506ft 11.8s 10s
OK Cesaroni I180 33.9oz 97ft/s 932ft/s 20.5G 3,529ft 11.9s 10s
OK Cesaroni I566 33.6oz 171ft/s 1,242ft/s 66.4G 3,534ft 11.3s 11s
OK AeroTech I225 37.1oz 99ft/s 927ft/s 25.3G 3,563ft 11.9s 10s
OK Cesaroni I212 36.8oz 98ft/s 967ft/s 22.9G 3,637ft 12.1s 10s
OK AeroTech I140 32.6oz 94ft/s 821ft/s 18.8G 3,642ft 12.1s 10s
OK AeroTech I1299 34.9oz 265ft/s 1,429ft/s 161.0G 3,731ft 11.4s 11s
OK Cesaroni I345 33.9oz 135ft/s 1,173ft/s 40.4G 3,808ft 11.8s 11s
OK AeroTech H45 32.9oz 64ft/s 586ft/s 8.3G 3,899ft 14.0s 8s
OK AeroTech I285 37.4oz 127ft/s 1,068ft/s 35.8G 3,905ft 12.2s 11s
OK Cesaroni I195 34.7oz 104ft/s 993ft/s 23.7G 3,935ft 12.3s 10s
OK Cesaroni I236 34.1oz 115ft/s 1,079ft/s 31.9G 3,981ft 12.1s 10s
OK AeroTech I154 37.4oz 84ft/s 798ft/s 15.3G 3,989ft 13.1s 10s
OK AeroTech I300 35.6oz 148ft/s 1,123ft/s 46.1G 4,013ft 12.0s 10s
OK Cesaroni I170 33.8oz 102ft/s 1,019ft/s 23.0G 4,025ft 12.4s 10s
OK AeroTech I211 36.0oz 123ft/s 1,006ft/s 31.1G 4,061ft 12.3s 10s
OK Cesaroni I175 35.4oz 97ft/s 985ft/s 18.4G 4,062ft 12.6s 10s
OK Cesaroni I55 35.4oz 52ft/s 616ft/s 7.6G 4,662ft 15.8s 9s
OK AeroTech I49 34.0oz 50ft/s 548ft/s 5.4G 4,714ft 16.2s 8s
OK AeroTech I59 37.2oz 83ft/s 639ft/s 15.0G 5,559ft 16.4s 8s

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.

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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