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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 108 motors that fit and appear to have enough thrust (639 motors didn't fit, 44 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:   I-Roc-KBW
Owner: Kenneth B Weaver
Body Diameter: 5.54in
Dry Weight: 115.0oz
MMT Diameter: 38.0mm
MMT Length: 20.00in
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 H303 135.8oz 85ft/s 126ft/s 19.6G 265ft 4.1s 4s
warningsW AeroTech H283 123.7oz 72ft/s 160ft/s 8.7G 385ft 5.0s 4s
OK AeroTech H148 125.9oz 52ft/s 145ft/s 4.5G 393ft 5.4s 4s
OK Contrail H246 136.1oz 79ft/s 157ft/s 13.1G 404ft 5.1s 4s
OK AeroTech H130 123.4oz 62ft/s 140ft/s 6.6G 404ft 5.4s 4s
OK Contrail H141 136.6oz 58ft/s 152ft/s 6.0G 441ft 5.6s 4s
OK AeroTech H669 123.9oz 112ft/s 195ft/s 31.1G 468ft 5.3s 5s
OK Loki H125 127.1oz 52ft/s 150ft/s 4.8G 472ft 5.9s 4s
OK Loki H144 126.9oz 60ft/s 160ft/s 6.0G 480ft 5.8s 4s
OK AeroTech H219 124.2oz 65ft/s 180ft/s 7.5G 493ft 5.7s 5s
OK AeroTech H242 124.3oz 59ft/s 179ft/s 5.9G 516ft 6.0s 5s
OK Loki H160 126.8oz 65ft/s 177ft/s 7.2G 541ft 6.0s 5s
OK Cesaroni H400 125.0oz 82ft/s 214ft/s 11.7G 569ft 5.9s 5s
OK Cesaroni H152 125.5oz 50ft/s 188ft/s 5.1G 605ft 6.6s 5s
OK AeroTech H178 126.4oz 48ft/s 201ft/s 5.1G 626ft 6.7s 5s
OK Cesaroni H225 121.8oz 61ft/s 213ft/s 6.6G 630ft 6.4s 5s
OK AeroTech H170 126.6oz 51ft/s 214ft/s 4.8G 733ft 7.1s 5s
OK AeroTech I218 128.1oz 64ft/s 227ft/s 7.0G 741ft 6.9s 5s
OK AeroTech H550 126.4oz 102ft/s 264ft/s 17.4G 760ft 6.6s 6s
OK AeroTech H550 126.1oz 103ft/s 266ft/s 17.5G 763ft 6.6s 6s
OK AeroTech I180 128.6oz 74ft/s 215ft/s 9.1G 770ft 7.0s 5s
warningsW Cesaroni H565 127.8oz 99ft/s 270ft/s 16.6G 772ft 6.7s 6s
OK AeroTech I161 127.9oz 54ft/s 214ft/s 5.1G 774ft 7.3s 5s
OK AeroTech H999 126.7oz 134ft/s 282ft/s 44.6G 785ft 6.6s 6s
OK AeroTech I140 127.6oz 48ft/s 206ft/s 4.1G 786ft 7.6s 5s
OK Cesaroni I180 128.9oz 51ft/s 232ft/s 4.8G 790ft 7.4s 5s
OK AeroTech I225 132.1oz 57ft/s 246ft/s 6.4G 852ft 7.5s 6s
OK AeroTech I245 127.9oz 78ft/s 251ft/s 10.6G 859ft 7.2s 6s
OK Cesaroni I212 131.8oz 54ft/s 253ft/s 5.8G 863ft 7.5s 6s
OK AeroTech I357 127.1oz 75ft/s 261ft/s 9.7G 864ft 7.2s 6s
OK Cesaroni I566 128.6oz 96ft/s 309ft/s 16.1G 928ft 7.2s 7s
OK Cesaroni I195 129.7oz 57ft/s 263ft/s 5.5G 974ft 8.0s 6s
OK Cesaroni I345 128.9oz 74ft/s 306ft/s 9.9G 1,008ft 7.7s 6s
OK Cesaroni I170 128.8oz 54ft/s 269ft/s 5.3G 1,008ft 8.2s 6s
OK Cesaroni I175 130.4oz 50ft/s 263ft/s 4.3G 1,011ft 8.3s 6s
OK AeroTech I285 132.4oz 73ft/s 296ft/s 9.2G 1,030ft 7.9s 6s
OK Cesaroni I236 129.1oz 62ft/s 288ft/s 7.7G 1,047ft 8.0s 6s
OK Cesaroni I800 131.1oz 113ft/s 350ft/s 22.7G 1,054ft 7.5s 7s
OK AeroTech I1299 129.9oz 155ft/s 367ft/s 40.6G 1,085ft 7.5s 7s
OK Cesaroni I223 132.4oz 57ft/s 294ft/s 5.9G 1,086ft 8.3s 6s
OK AeroTech I211 131.0oz 66ft/s 281ft/s 7.8G 1,090ft 8.2s 6s
OK AeroTech I305 135.5oz 76ft/s 307ft/s 9.8G 1,103ft 8.0s 6s
OK AeroTech I195 135.2oz 69ft/s 283ft/s 8.6G 1,109ft 8.3s 6s
OK AeroTech I300 130.6oz 77ft/s 311ft/s 11.8G 1,111ft 8.0s 6s
OK Loki I316 134.0oz 84ft/s 327ft/s 12.4G 1,204ft 8.2s 7s
OK Cesaroni I287 136.3oz 65ft/s 336ft/s 7.8G 1,233ft 8.6s 7s
OK Loki I210 134.0oz 74ft/s 307ft/s 10.9G 1,259ft 8.6s 6s
OK Loki I405 134.2oz 105ft/s 359ft/s 20.5G 1,277ft 8.2s 7s
OK Cesaroni I285 132.8oz 68ft/s 346ft/s 8.5G 1,311ft 8.7s 7s
OK Cesaroni I255 133.2oz 67ft/s 342ft/s 7.5G 1,331ft 8.9s 7s
OK Loki I430 134.0oz 85ft/s 388ft/s 13.3G 1,343ft 8.5s 7s
OK Loki I377 134.8oz 92ft/s 363ft/s 16.5G 1,347ft 8.5s 7s
OK AeroTech I327 137.2oz 77ft/s 372ft/s 10.3G 1,380ft 8.8s 7s
OK AeroTech I366 134.6oz 85ft/s 376ft/s 12.0G 1,380ft 8.7s 7s
OK AMW I297 135.8oz 70ft/s 365ft/s 8.9G 1,382ft 8.9s 7s
OK AeroTech I364 138.9oz 75ft/s 370ft/s 9.6G 1,393ft 8.8s 7s
OK Cesaroni I470 132.5oz 90ft/s 406ft/s 14.1G 1,393ft 8.6s 7s
OK Cesaroni I303 132.6oz 72ft/s 367ft/s 10.2G 1,400ft 8.9s 7s
OK Cesaroni I242 134.4oz 61ft/s 351ft/s 6.6G 1,421ft 9.2s 7s
OK AeroTech I280 136.7oz 68ft/s 368ft/s 7.9G 1,427ft 9.1s 7s
OK Cesaroni I125 137.8oz 51ft/s 270ft/s 6.0G 1,452ft 10.1s 6s
OK AeroTech I435 133.3oz 103ft/s 413ft/s 19.4G 1,477ft 8.7s 7s
OK KBA I550 140.1oz 91ft/s 454ft/s 16.0G 1,479ft 8.7s 8s
OK KBA I301 140.6oz 72ft/s 391ft/s 9.4G 1,486ft 9.0s 7s
OK Cesaroni I350 142.6oz 74ft/s 397ft/s 9.1G 1,504ft 9.1s 7s
OK AeroTech I284 134.6oz 83ft/s 391ft/s 11.9G 1,517ft 9.0s 7s
OK AeroTech I500 135.3oz 89ft/s 448ft/s 14.3G 1,593ft 9.0s 8s
warningsW Cesaroni I540 136.1oz 98ft/s 466ft/s 15.6G 1,616ft 9.0s 8s
OK AeroTech I600 136.2oz 107ft/s 465ft/s 20.6G 1,625ft 9.0s 8s
OK Loki J396 141.5oz 76ft/s 436ft/s 12.4G 1,635ft 9.3s 8s
OK AeroTech I350 136.7oz 79ft/s 444ft/s 11.7G 1,647ft 9.3s 8s
OK AeroTech J420 137.9oz 89ft/s 442ft/s 13.5G 1,650ft 9.3s 8s
OK Cesaroni I216 136.2oz 64ft/s 369ft/s 7.9G 1,655ft 9.8s 7s
OK KBA J740 140.5oz 113ft/s 500ft/s 22.5G 1,655ft 9.0s 8s
OK Cesaroni J335 137.1oz 76ft/s 425ft/s 9.8G 1,660ft 9.5s 7s
OK AeroTech J350 138.5oz 102ft/s 445ft/s 20.4G 1,669ft 9.2s 8s
OK Cesaroni J381 139.3oz 84ft/s 438ft/s 12.1G 1,669ft 9.4s 7s
OK Cesaroni J285 136.0oz 71ft/s 410ft/s 8.6G 1,675ft 9.6s 7s
OK AeroTech J340 135.4oz 84ft/s 432ft/s 15.0G 1,677ft 9.3s 7s
OK Cesaroni J270 138.1oz 64ft/s 404ft/s 6.7G 1,681ft 9.8s 7s
OK Cesaroni J316 136.4oz 74ft/s 417ft/s 10.5G 1,688ft 9.6s 7s
OK Cesaroni J357 136.2oz 82ft/s 440ft/s 12.6G 1,689ft 9.4s 8s
OK AeroTech J425 137.3oz 77ft/s 470ft/s 10.5G 1,728ft 9.5s 8s
OK Cesaroni J290 138.3oz 72ft/s 422ft/s 9.2G 1,758ft 9.8s 7s
OK Cesaroni J400 139.8oz 82ft/s 461ft/s 11.0G 1,766ft 9.6s 8s
OK AeroTech J520 142.2oz 122ft/s 480ft/s 24.7G 1,782ft 9.3s 8s
OK AeroTech J270 137.6oz 68ft/s 423ft/s 8.4G 1,806ft 10.0s 7s
OK AeroTech J500 138.1oz 103ft/s 494ft/s 19.6G 1,819ft 9.4s 8s
OK Loki J528 141.3oz 111ft/s 518ft/s 25.0G 1,841ft 9.4s 8s
OK AeroTech J575 147.2oz 113ft/s 531ft/s 20.3G 1,907ft 9.5s 8s
OK Cesaroni J330 139.8oz 81ft/s 470ft/s 10.8G 1,937ft 10.0s 8s
OK Cesaroni J410 140.9oz 86ft/s 496ft/s 12.0G 1,941ft 9.9s 8s
OK AeroTech J435 137.0oz 99ft/s 511ft/s 17.1G 1,943ft 9.7s 8s
OK Loki J712 141.5oz 107ft/s 562ft/s 21.3G 1,955ft 9.6s 8s
OK Cesaroni J425 139.7oz 89ft/s 505ft/s 16.2G 1,959ft 9.8s 8s
OK Loki J320 141.5oz 79ft/s 475ft/s 12.5G 2,039ft 10.3s 8s
OK Cesaroni J354 142.4oz 81ft/s 482ft/s 12.1G 2,049ft 10.2s 8s
OK Cesaroni J520 145.0oz 93ft/s 550ft/s 15.2G 2,052ft 10.0s 8s
OK Cesaroni J580 151.8oz 91ft/s 567ft/s 14.9G 2,116ft 10.1s 8s
OK AeroTech J825 145.9oz 121ft/s 660ft/s 28.0G 2,235ft 9.9s 9s
OK Cesaroni J595 145.5oz 105ft/s 610ft/s 21.5G 2,320ft 10.3s 9s
OK Cesaroni J600 147.0oz 98ft/s 631ft/s 16.7G 2,332ft 10.3s 9s
OK Cesaroni J394 148.1oz 76ft/s 558ft/s 9.8G 2,344ft 10.8s 8s
OK Cesaroni J453 149.0oz 92ft/s 577ft/s 16.5G 2,406ft 10.6s 8s
OK AeroTech J570 146.8oz 124ft/s 592ft/s 27.2G 2,409ft 10.4s 8s
OK Cesaroni J420 145.8oz 97ft/s 571ft/s 18.3G 2,411ft 10.6s 8s
OK Cesaroni J150 148.5oz 56ft/s 366ft/s 6.9G 2,453ft 12.6s 6s
OK Cesaroni J530 149.5oz 103ft/s 638ft/s 18.3G 2,558ft 10.6s 9s

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 (95ft)
failedA AeroTech G339 rocket doesn't reach a safe altitude (146ft)
failedG AeroTech G67 speed at end of launch guide too slow (31ft/s)
failedG Loki G69 speed at end of launch guide too slow (32ft/s)
failedG AeroTech G61 speed at end of launch guide too slow (28ft/s)
failedA Contrail G234 rocket doesn't reach a safe altitude (135ft)
failedG Loki G70 speed at end of launch guide too slow (34ft/s)
failedG Loki G94 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni G69 speed at end of launch guide too slow (28ft/s)
failedG Loki G80 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni G46 speed at end of launch guide too slow (20ft/s)
failedA Cesaroni G185 rocket doesn't reach a safe altitude (168ft)
failedG Cesaroni G79 speed at end of launch guide too slow (30ft/s)
failedG Loki G66 speed at end of launch guide too slow (36ft/s)
failedG Cesaroni G60 speed at end of launch guide too slow (29ft/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 (22ft/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)
failedA Contrail G123 rocket doesn't reach a safe altitude (173ft)
failedG Contrail G100 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (20ft/s)
failedA Contrail G300 rocket doesn't reach a safe altitude (103ft)
failedA Contrail H222 rocket doesn't reach a safe altitude (234ft)
failedA Contrail H300 rocket doesn't reach a safe altitude (236ft)
failedG AeroTech H73 speed at end of launch guide too slow (28ft/s)
failedG Loki H100 speed at end of launch guide too slow (41ft/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 (41ft/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 (43ft/s)
failedG Cesaroni H120 speed at end of launch guide too slow (43ft/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 (38ft/s)
failedG Cesaroni H125 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni H100 speed at end of launch guide too slow (38ft/s)
failedG AeroTech H45 speed at end of launch guide too slow (29ft/s)
failedG AeroTech I154 speed at end of launch guide too slow (44ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (20ft/s)
failedG Cesaroni I55 speed at end of launch guide too slow (23ft/s)
failedG AeroTech I59 speed at end of launch guide too slow (45ft/s)
failedG Loki I110 speed at end of launch guide too slow (46ft/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 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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