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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 87 motors that fit and appear to have enough thrust (664 motors didn't fit, 40 motors failed safety checks). 127 motor had thrust curves available and 267 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:   BSD Little John
Owner: Kenneth B Weaver
Body Diameter: 4.00in
Dry Weight: 94.0oz
MMT Diameter: 38.0mm
MMT Length: 16.00in
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 Contrail G123 112.0oz 50ft/s 111ft/s 10.4G 256ft 4.3s 3s
OK Cesaroni G185 100.6oz 53ft/s 124ft/s 6.4G 258ft 4.3s 4s
OK Contrail H222 112.3oz 71ft/s 140ft/s 20.7G 340ft 4.7s 4s
warningsW AeroTech H283 102.7oz 69ft/s 199ft/s 10.7G 579ft 6.1s 5s
OK AeroTech H148 104.9oz 51ft/s 185ft/s 5.6G 597ft 6.5s 5s
OK AeroTech H130 102.4oz 60ft/s 181ft/s 8.1G 613ft 6.5s 5s
OK AeroTech H669 102.9oz 108ft/s 238ft/s 37.7G 701ft 6.4s 6s
OK Loki H125 106.1oz 50ft/s 194ft/s 6.0G 714ft 7.1s 5s
OK Loki H144 105.9oz 58ft/s 204ft/s 7.4G 723ft 7.0s 5s
OK AeroTech H219 103.2oz 64ft/s 226ft/s 9.2G 744ft 6.9s 6s
OK AeroTech H242 103.3oz 58ft/s 227ft/s 7.3G 782ft 7.2s 6s
OK Loki H160 105.8oz 62ft/s 224ft/s 8.8G 812ft 7.3s 6s
OK Cesaroni H400 104.0oz 78ft/s 264ft/s 14.3G 855ft 7.2s 7s
OK Cesaroni H152 104.5oz 48ft/s 241ft/s 6.3G 921ft 8.0s 6s
OK Cesaroni H225 100.8oz 61ft/s 269ft/s 8.2G 958ft 7.8s 7s
OK AeroTech H170 105.6oz 50ft/s 274ft/s 6.0G 1,110ft 8.6s 6s
OK AeroTech I218 107.1oz 63ft/s 286ft/s 8.6G 1,114ft 8.4s 7s
OK AeroTech H550 105.4oz 97ft/s 324ft/s 21.1G 1,141ft 8.1s 7s
OK AeroTech H550 105.1oz 98ft/s 327ft/s 21.2G 1,147ft 8.1s 7s
OK AeroTech I180 107.6oz 73ft/s 273ft/s 11.1G 1,153ft 8.5s 7s
warningsW Cesaroni H565 106.8oz 95ft/s 330ft/s 20.5G 1,159ft 8.1s 8s
OK AeroTech I161 106.9oz 52ft/s 275ft/s 6.3G 1,169ft 8.8s 7s
OK AeroTech H999 105.7oz 132ft/s 343ft/s 53.7G 1,179ft 8.1s 8s
OK AeroTech I140 106.6oz 48ft/s 268ft/s 5.1G 1,193ft 9.1s 7s
OK Cesaroni I180 107.9oz 50ft/s 294ft/s 6.1G 1,193ft 8.9s 7s
OK AeroTech I225 111.1oz 53ft/s 309ft/s 7.9G 1,278ft 9.0s 7s
OK AeroTech I245 106.9oz 74ft/s 316ft/s 12.9G 1,289ft 8.8s 7s
OK Cesaroni I212 110.8oz 53ft/s 318ft/s 7.2G 1,299ft 9.1s 7s
OK AeroTech I357 106.1oz 73ft/s 327ft/s 11.9G 1,299ft 8.8s 7s
OK Cesaroni I566 107.6oz 92ft/s 379ft/s 19.7G 1,396ft 8.8s 8s
OK Cesaroni I195 108.7oz 55ft/s 335ft/s 6.8G 1,468ft 9.7s 8s
OK Cesaroni I345 107.9oz 72ft/s 380ft/s 12.0G 1,517ft 9.4s 8s
OK Cesaroni I170 107.8oz 53ft/s 343ft/s 6.5G 1,522ft 9.8s 7s
OK Cesaroni I175 109.4oz 49ft/s 336ft/s 5.3G 1,525ft 10.0s 8s
OK AeroTech I285 111.4oz 70ft/s 369ft/s 11.2G 1,543ft 9.5s 8s
OK Cesaroni I236 108.1oz 61ft/s 364ft/s 9.3G 1,577ft 9.8s 8s
OK Cesaroni I800 110.1oz 110ft/s 425ft/s 28.1G 1,585ft 9.2s 9s
OK Cesaroni I223 111.4oz 54ft/s 371ft/s 7.2G 1,631ft 10.0s 8s
OK AeroTech I1299 108.9oz 149ft/s 445ft/s 49.2G 1,634ft 9.2s 9s
OK AeroTech I211 110.0oz 64ft/s 357ft/s 9.5G 1,634ft 9.9s 8s
OK AeroTech I305 114.5oz 73ft/s 382ft/s 11.9G 1,646ft 9.7s 8s
OK AeroTech I195 114.2oz 67ft/s 357ft/s 10.4G 1,655ft 10.0s 8s
OK AeroTech I300 109.6oz 75ft/s 389ft/s 14.3G 1,667ft 9.7s 8s
OK Loki I316 113.0oz 82ft/s 408ft/s 15.0G 1,800ft 10.0s 9s
OK Cesaroni I287 115.3oz 62ft/s 420ft/s 9.7G 1,846ft 10.4s 9s
OK Loki I210 113.0oz 73ft/s 388ft/s 13.1G 1,880ft 10.4s 8s
OK Loki I405 113.2oz 100ft/s 446ft/s 24.5G 1,912ft 10.1s 9s
OK Cesaroni I285 111.8oz 65ft/s 436ft/s 10.3G 1,969ft 10.6s 9s
OK Cesaroni I255 112.2oz 64ft/s 432ft/s 9.1G 1,997ft 10.7s 9s
OK Loki I377 113.8oz 89ft/s 453ft/s 19.8G 2,017ft 10.4s 9s
OK Loki I430 113.0oz 81ft/s 480ft/s 15.9G 2,018ft 10.4s 9s
OK AeroTech I327 116.2oz 75ft/s 463ft/s 12.4G 2,063ft 10.7s 9s
OK AMW I297 114.8oz 69ft/s 457ft/s 10.7G 2,069ft 10.7s 9s
OK AeroTech I366 113.6oz 82ft/s 470ft/s 14.5G 2,070ft 10.6s 9s
OK AeroTech I364 117.9oz 72ft/s 462ft/s 11.7G 2,082ft 10.7s 9s
OK Cesaroni I470 111.5oz 87ft/s 503ft/s 17.0G 2,098ft 10.5s 9s
OK Cesaroni I303 111.6oz 70ft/s 462ft/s 12.3G 2,103ft 10.8s 9s
OK Cesaroni I242 113.4oz 60ft/s 446ft/s 8.1G 2,130ft 11.1s 9s
OK AeroTech I280 115.7oz 65ft/s 463ft/s 9.5G 2,137ft 11.0s 9s
OK Cesaroni I125 116.8oz 50ft/s 354ft/s 7.2G 2,167ft 12.0s 7s
OK KBA I301 119.6oz 65ft/s 493ft/s 11.3G 2,217ft 10.9s 9s
OK AeroTech I435 112.3oz 100ft/s 514ft/s 23.2G 2,220ft 10.7s 9s
OK KBA I550 119.1oz 86ft/s 561ft/s 19.7G 2,220ft 10.6s 10s
OK Cesaroni I350 121.6oz 71ft/s 494ft/s 10.8G 2,243ft 11.1s 9s
OK AeroTech I284 113.6oz 80ft/s 492ft/s 14.4G 2,274ft 11.0s 9s
OK AeroTech I500 114.3oz 86ft/s 555ft/s 17.1G 2,397ft 11.0s 10s
warningsW Cesaroni I540 115.1oz 93ft/s 577ft/s 18.8G 2,434ft 11.0s 10s
OK AeroTech I600 115.2oz 106ft/s 575ft/s 24.6G 2,445ft 11.0s 10s
OK Loki J396 120.5oz 72ft/s 542ft/s 15.1G 2,448ft 11.3s 10s
OK Cesaroni I216 115.2oz 61ft/s 472ft/s 9.6G 2,473ft 11.8s 9s
OK AeroTech I350 115.7oz 78ft/s 555ft/s 14.2G 2,475ft 11.3s 10s
OK AeroTech J420 116.9oz 84ft/s 552ft/s 16.2G 2,477ft 11.3s 10s
OK Cesaroni J335 116.1oz 73ft/s 534ft/s 11.7G 2,487ft 11.5s 9s
OK KBA J740 119.5oz 106ft/s 608ft/s 27.0G 2,493ft 11.1s 10s
OK AeroTech J350 117.5oz 97ft/s 554ft/s 24.2G 2,499ft 11.2s 10s
OK AeroTech J340 114.4oz 84ft/s 543ft/s 17.9G 2,512ft 11.3s 9s
OK Cesaroni J285 115.0oz 68ft/s 519ft/s 10.4G 2,512ft 11.7s 9s
OK Cesaroni J270 117.1oz 60ft/s 513ft/s 8.2G 2,515ft 11.8s 9s
OK Cesaroni J316 115.4oz 71ft/s 525ft/s 12.6G 2,529ft 11.6s 9s
OK Cesaroni J357 115.2oz 78ft/s 554ft/s 15.1G 2,536ft 11.5s 10s
OK AeroTech J425 116.3oz 73ft/s 588ft/s 12.8G 2,599ft 11.6s 10s
OK Cesaroni J290 117.3oz 68ft/s 534ft/s 11.0G 2,630ft 11.9s 9s
OK AeroTech J270 116.6oz 67ft/s 537ft/s 10.0G 2,703ft 12.0s 9s
OK AeroTech J500 117.1oz 97ft/s 616ft/s 23.3G 2,735ft 11.5s 10s
OK AeroTech J435 116.0oz 95ft/s 642ft/s 20.4G 2,922ft 11.9s 10s
OK Loki J712 120.5oz 105ft/s 692ft/s 25.2G 2,947ft 11.8s 11s
OK Loki J320 120.5oz 77ft/s 601ft/s 14.8G 3,047ft 12.5s 10s

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 (139ft)
failedA AeroTech G339 rocket doesn't reach a safe altitude (220ft)
failedG AeroTech G67 speed at end of launch guide too slow (32ft/s)
failedG Loki G69 speed at end of launch guide too slow (34ft/s)
failedG AeroTech G61 speed at end of launch guide too slow (30ft/s)
failedG Loki G70 speed at end of launch guide too slow (34ft/s)
failedG Loki G94 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni G69 speed at end of launch guide too slow (29ft/s)
failedG Loki G80 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni G46 speed at end of launch guide too slow (23ft/s)
failedG Cesaroni G79 speed at end of launch guide too slow (29ft/s)
failedG Loki G66 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni G60 speed at end of launch guide too slow (30ft/s)
failedG AeroTech G69 speed at end of launch guide too slow (29ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (23ft/s)
failedG Cesaroni G115 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni G78 speed at end of launch guide too slow (31ft/s)
failedG Contrail G100 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (21ft/s)
failedA Contrail G300 rocket doesn't reach a safe altitude (147ft)
failedG AeroTech H73 speed at end of launch guide too slow (28ft/s)
failedG Loki H100 speed at end of launch guide too slow (40ft/s)
failedG AeroTech H123 speed at end of launch guide too slow (43ft/s)
failedG AeroTech H100 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni H123 speed at end of launch guide too slow (39ft/s)
failedG Loki H90 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni H143 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni H120 speed at end of launch guide too slow (42ft/s)
failedG AeroTech H112 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni H110 speed at end of launch guide too slow (37ft/s)
failedG AeroTech H178 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni H125 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni H100 speed at end of launch guide too slow (37ft/s)
failedG AeroTech H45 speed at end of launch guide too slow (30ft/s)
failedG AeroTech I154 speed at end of launch guide too slow (43ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (21ft/s)
failedG Cesaroni I55 speed at end of launch guide too slow (24ft/s)
failedG AeroTech I59 speed at end of launch guide too slow (42ft/s)
failedG Loki I110 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni J94 speed at end of launch guide too slow (40ft/s)

G These simulations were run with a launch guide length of 7ft (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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