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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 123 motors that fit and appear to have enough thrust (639 motors didn't fit, 29 motors failed safety checks). 152 motor had thrust curves available and 316 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:   J-bird
Owner: Dean Mumme
Body Diameter: 4.00in
Dry Weight: 5.85lb
MMT Diameter: 38.0mm
MMT Length: 20.00in
CD: 0.70

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 G339 6.25lb 87ft/s 119ft/s 12.5G 223ft 3.8s 3s
OK Contrail G123 6.98lb 56ft/s 112ft/s 10.5G 259ft 4.4s 3s
OK Cesaroni G185 6.27lb 61ft/s 125ft/s 6.4G 261ft 4.3s 4s
OK Contrail G100 6.98lb 54ft/s 108ft/s 4.9G 266ft 4.5s 3s
OK Contrail H222 7.00lb 81ft/s 141ft/s 20.8G 345ft 4.8s 4s
OK Contrail H300 7.20lb 89ft/s 143ft/s 21.3G 345ft 4.7s 4s
OK Contrail H303 7.15lb 98ft/s 154ft/s 23.5G 389ft 5.0s 4s
OK Loki H100 6.59lb 48ft/s 158ft/s 4.1G 514ft 6.3s 4s
warningsW AeroTech H283 6.39lb 82ft/s 200ft/s 10.8G 590ft 6.2s 5s
OK Contrail H246 7.17lb 91ft/s 193ft/s 15.7G 598ft 6.2s 5s
OK AeroTech H148 6.53lb 60ft/s 186ft/s 5.7G 608ft 6.6s 5s
OK AeroTech H130 6.37lb 70ft/s 182ft/s 8.1G 625ft 6.5s 5s
OK AeroTech H123 6.46lb 50ft/s 177ft/s 4.2G 659ft 7.1s 5s
OK Contrail H141 7.20lb 67ft/s 191ft/s 7.3G 660ft 6.7s 5s
OK Loki H90 6.59lb 49ft/s 173ft/s 4.0G 668ft 7.2s 5s
OK AeroTech H669 6.41lb 127ft/s 239ft/s 37.8G 716ft 6.5s 6s
OK Cesaroni H143 6.62lb 49ft/s 209ft/s 4.6G 724ft 7.3s 6s
OK Loki H125 6.60lb 59ft/s 195ft/s 6.0G 728ft 7.2s 5s
OK Loki H144 6.59lb 67ft/s 205ft/s 7.5G 738ft 7.1s 5s
OK AeroTech H219 6.43lb 75ft/s 228ft/s 9.2G 760ft 7.0s 6s
OK AeroTech H242 6.43lb 67ft/s 228ft/s 7.3G 798ft 7.3s 6s
OK Cesaroni H120 6.50lb 50ft/s 216ft/s 4.1G 825ft 7.9s 6s
OK Loki H160 6.59lb 73ft/s 225ft/s 8.8G 829ft 7.3s 6s
OK Cesaroni H125 6.50lb 49ft/s 227ft/s 4.3G 862ft 8.0s 6s
OK Cesaroni H400 6.48lb 92ft/s 265ft/s 14.4G 875ft 7.3s 7s
OK Cesaroni H152 6.51lb 56ft/s 243ft/s 6.3G 942ft 8.1s 6s
OK AeroTech H178 6.56lb 55ft/s 257ft/s 6.4G 972ft 8.1s 6s
OK Cesaroni H225 6.28lb 71ft/s 271ft/s 8.2G 982ft 7.9s 7s
OK AeroTech H170 6.58lb 59ft/s 276ft/s 6.0G 1,138ft 8.7s 7s
OK AeroTech I218 6.67lb 74ft/s 289ft/s 8.6G 1,142ft 8.5s 7s
OK AeroTech H550 6.56lb 117ft/s 326ft/s 21.2G 1,172ft 8.2s 8s
OK AeroTech H550 6.55lb 117ft/s 329ft/s 21.3G 1,178ft 8.2s 8s
OK AeroTech I180 6.70lb 84ft/s 275ft/s 11.2G 1,182ft 8.6s 7s
warningsW Cesaroni H565 6.65lb 110ft/s 332ft/s 20.7G 1,191ft 8.3s 8s
OK AeroTech I161 6.66lb 62ft/s 277ft/s 6.4G 1,199ft 8.9s 7s
OK AeroTech H999 6.58lb 152ft/s 344ft/s 53.9G 1,212ft 8.2s 8s
OK AeroTech I140 6.63lb 56ft/s 271ft/s 5.1G 1,223ft 9.2s 7s
OK Cesaroni I180 6.72lb 57ft/s 296ft/s 6.1G 1,224ft 9.0s 7s
OK AeroTech I225 6.92lb 65ft/s 312ft/s 8.0G 1,312ft 9.1s 7s
OK AeroTech I245 6.65lb 91ft/s 318ft/s 13.0G 1,324ft 8.9s 7s
OK Cesaroni I212 6.90lb 61ft/s 321ft/s 7.3G 1,334ft 9.2s 8s
OK AeroTech I357 6.61lb 85ft/s 329ft/s 11.9G 1,336ft 8.9s 8s
OK AeroTech I154 6.93lb 51ft/s 277ft/s 4.5G 1,364ft 10.0s 7s
OK Cesaroni I566 6.70lb 108ft/s 381ft/s 19.8G 1,438ft 9.0s 8s
OK Cesaroni I195 6.77lb 64ft/s 339ft/s 6.9G 1,509ft 9.8s 8s
OK Cesaroni I345 6.72lb 83ft/s 383ft/s 12.0G 1,563ft 9.5s 8s
OK Cesaroni I170 6.71lb 62ft/s 346ft/s 6.5G 1,565ft 10.0s 8s
OK Cesaroni I175 6.81lb 58ft/s 339ft/s 5.4G 1,568ft 10.1s 8s
OK AeroTech I285 6.94lb 83ft/s 372ft/s 11.2G 1,589ft 9.7s 8s
OK Cesaroni I236 6.73lb 72ft/s 367ft/s 9.4G 1,624ft 9.9s 8s
OK Cesaroni I800 6.86lb 128ft/s 428ft/s 28.3G 1,635ft 9.4s 9s
OK Cesaroni I223 6.94lb 65ft/s 374ft/s 7.3G 1,680ft 10.2s 8s
OK AeroTech I211 6.85lb 74ft/s 360ft/s 9.5G 1,683ft 10.1s 8s
OK AeroTech I1299 6.78lb 176ft/s 447ft/s 49.4G 1,687ft 9.4s 9s
OK AeroTech I305 7.13lb 84ft/s 386ft/s 11.9G 1,696ft 9.9s 8s
OK AeroTech I195 7.11lb 77ft/s 361ft/s 10.4G 1,703ft 10.1s 8s
OK AeroTech I300 6.82lb 87ft/s 393ft/s 14.3G 1,718ft 9.9s 8s
OK AeroTech I59 6.92lb 51ft/s 208ft/s 4.5G 1,810ft 12.8s 4s
warningsW Loki I110 7.15lb 53ft/s 325ft/s 7.3G 1,841ft 11.2s 7s
OK Loki I316 7.04lb 97ft/s 412ft/s 15.0G 1,857ft 10.2s 9s
OK Cesaroni I287 7.18lb 73ft/s 424ft/s 9.7G 1,905ft 10.5s 9s
OK Loki I210 7.04lb 83ft/s 392ft/s 13.1G 1,938ft 10.6s 8s
OK Loki I405 7.05lb 120ft/s 450ft/s 24.6G 1,975ft 10.3s 9s
OK Cesaroni I285 6.97lb 77ft/s 440ft/s 10.4G 2,034ft 10.8s 9s
OK Cesaroni I255 6.99lb 73ft/s 437ft/s 9.2G 2,063ft 10.9s 9s
OK Loki I377 7.08lb 106ft/s 458ft/s 19.9G 2,084ft 10.6s 9s
OK Loki I430 7.04lb 94ft/s 484ft/s 16.0G 2,086ft 10.6s 9s
OK AeroTech I327 7.23lb 86ft/s 467ft/s 12.4G 2,133ft 10.9s 9s
OK AMW I297 7.15lb 79ft/s 461ft/s 10.7G 2,138ft 10.9s 9s
OK AeroTech I366 7.07lb 96ft/s 475ft/s 14.5G 2,141ft 10.8s 9s
OK AeroTech I364 7.34lb 84ft/s 466ft/s 11.8G 2,152ft 10.9s 9s
OK Cesaroni I470 6.94lb 103ft/s 508ft/s 17.0G 2,172ft 10.7s 10s
OK Cesaroni I303 6.95lb 81ft/s 467ft/s 12.3G 2,175ft 11.0s 9s
OK Cesaroni I242 7.06lb 70ft/s 452ft/s 8.1G 2,201ft 11.4s 9s
OK AeroTech I280 7.21lb 77ft/s 468ft/s 9.5G 2,209ft 11.2s 9s
OK Cesaroni I125 7.28lb 58ft/s 360ft/s 7.3G 2,233ft 12.2s 8s
OK KBA I301 7.45lb 79ft/s 499ft/s 11.4G 2,296ft 11.2s 9s
OK AeroTech I435 6.99lb 115ft/s 518ft/s 23.3G 2,299ft 10.9s 10s
OK KBA I550 7.42lb 103ft/s 566ft/s 19.9G 2,303ft 10.8s 10s
OK Cesaroni I350 7.57lb 82ft/s 499ft/s 10.9G 2,320ft 11.3s 10s
OK AeroTech I284 7.07lb 93ft/s 497ft/s 14.5G 2,355ft 11.2s 9s
OK AeroTech I500 7.12lb 102ft/s 560ft/s 17.2G 2,486ft 11.3s 10s
warningsW Cesaroni I540 7.17lb 112ft/s 582ft/s 18.8G 2,525ft 11.3s 10s
OK Loki J396 7.51lb 87ft/s 547ft/s 15.3G 2,536ft 11.6s 10s
OK AeroTech I600 7.18lb 121ft/s 580ft/s 24.7G 2,537ft 11.3s 10s
OK Cesaroni I216 7.17lb 72ft/s 478ft/s 9.6G 2,558ft 12.1s 9s
OK AeroTech I350 7.21lb 91ft/s 561ft/s 14.2G 2,566ft 11.6s 10s
OK AeroTech J420 7.28lb 98ft/s 558ft/s 16.2G 2,568ft 11.5s 10s
OK Cesaroni J335 7.23lb 88ft/s 540ft/s 11.8G 2,577ft 11.7s 10s
OK KBA J740 7.45lb 128ft/s 612ft/s 27.2G 2,588ft 11.3s 10s
OK Cesaroni J381 7.37lb 92ft/s 552ft/s 14.4G 2,589ft 11.6s 10s
OK AeroTech J350 7.32lb 113ft/s 560ft/s 24.3G 2,592ft 11.5s 10s
OK Cesaroni J285 7.16lb 82ft/s 525ft/s 10.5G 2,602ft 11.9s 10s
OK AeroTech J340 7.12lb 97ft/s 549ft/s 18.0G 2,604ft 11.6s 9s
OK Cesaroni J270 7.29lb 70ft/s 520ft/s 8.2G 2,605ft 12.1s 10s
OK Cesaroni J316 7.19lb 86ft/s 531ft/s 12.7G 2,620ft 11.9s 10s
OK Cesaroni J357 7.17lb 91ft/s 560ft/s 15.1G 2,629ft 11.7s 10s
OK AeroTech J425 7.24lb 85ft/s 594ft/s 12.9G 2,696ft 11.8s 10s
OK Cesaroni J290 7.30lb 81ft/s 541ft/s 11.1G 2,725ft 12.1s 10s
OK Cesaroni J400 7.40lb 92ft/s 584ft/s 13.5G 2,747ft 11.9s 10s
OK AeroTech J520 7.55lb 136ft/s 599ft/s 29.5G 2,772ft 11.7s 10s
OK AeroTech J270 7.27lb 80ft/s 544ft/s 10.1G 2,802ft 12.3s 10s
OK AeroTech J500 7.29lb 117ft/s 623ft/s 23.4G 2,841ft 11.8s 10s
OK Loki J528 7.49lb 124ft/s 644ft/s 29.6G 2,876ft 11.8s 11s
OK AeroTech J575 7.87lb 126ft/s 659ft/s 24.1G 2,968ft 11.9s 11s
OK Cesaroni J330 7.40lb 90ft/s 600ft/s 13.0G 3,011ft 12.4s 10s
OK Cesaroni J410 7.47lb 96ft/s 630ft/s 14.4G 3,021ft 12.3s 10s
OK AeroTech J435 7.23lb 107ft/s 649ft/s 20.4G 3,037ft 12.2s 10s
OK Cesaroni J425 7.39lb 101ft/s 640ft/s 19.4G 3,051ft 12.2s 10s
OK Loki J712 7.51lb 120ft/s 698ft/s 25.3G 3,065ft 12.1s 11s
OK Loki J320 7.51lb 89ft/s 609ft/s 14.9G 3,162ft 12.7s 10s
OK Cesaroni J354 7.57lb 92ft/s 620ft/s 14.5G 3,177ft 12.7s 10s
OK Cesaroni J520 7.72lb 101ft/s 690ft/s 18.1G 3,200ft 12.4s 11s
OK Cesaroni J580 8.15lb 103ft/s 708ft/s 17.5G 3,294ft 12.6s 11s
OK AeroTech J825 7.78lb 143ft/s 821ft/s 33.0G 3,516ft 12.5s 11s
OK Cesaroni J595 7.76lb 117ft/s 774ft/s 25.4G 3,632ft 12.9s 11s
OK Cesaroni J394 7.92lb 83ft/s 717ft/s 11.6G 3,640ft 13.4s 11s
OK Cesaroni J600 7.85lb 110ft/s 796ft/s 19.8G 3,650ft 12.9s 11s
OK Cesaroni J453 7.98lb 103ft/s 736ft/s 19.5G 3,738ft 13.3s 11s
OK Cesaroni J150 7.95lb 63ft/s 491ft/s 8.2G 3,739ft 15.1s 9s
OK Cesaroni J420 7.78lb 109ft/s 729ft/s 21.7G 3,750ft 13.2s 11s
OK AeroTech J570 7.84lb 140ft/s 754ft/s 32.1G 3,756ft 13.0s 11s
OK Cesaroni J530 8.00lb 114ft/s 811ft/s 21.6G 3,994ft 13.3s 11s

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
failedA Contrail G130 rocket doesn't reach a safe altitude (141ft)
failedG AeroTech G67 speed at end of launch guide too slow (37ft/s)
failedG Loki G69 speed at end of launch guide too slow (39ft/s)
failedG AeroTech G61 speed at end of launch guide too slow (35ft/s)
failedA Contrail G234 rocket doesn't reach a safe altitude (197ft)
failedG Loki G70 speed at end of launch guide too slow (40ft/s)
failedG Loki G94 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni G69 speed at end of launch guide too slow (34ft/s)
failedG Loki G80 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni G46 speed at end of launch guide too slow (26ft/s)
failedG Cesaroni G79 speed at end of launch guide too slow (35ft/s)
failedG Loki G66 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni G60 speed at end of launch guide too slow (35ft/s)
failedG AeroTech G69 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (27ft/s)
failedG Cesaroni G115 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni G78 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (25ft/s)
failedA Contrail G300 rocket doesn't reach a safe altitude (149ft)
failedG AeroTech H73 speed at end of launch guide too slow (34ft/s)
failedG AeroTech H100 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni H123 speed at end of launch guide too slow (47ft/s)
failedG AeroTech H112 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni H110 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni H100 speed at end of launch guide too slow (44ft/s)
failedG AeroTech H45 speed at end of launch guide too slow (35ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (25ft/s)
failedG Cesaroni I55 speed at end of launch guide too slow (28ft/s)
failedG Cesaroni J94 speed at end of launch guide too slow (46ft/s)

G These simulations were run with a launch guide length of 10ft (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.)

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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