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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 95 motors that fit and appear to have enough thrust (672 motors didn't fit, 24 motors failed safety checks). 119 motor had thrust curves available and 252 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:   MadCow Screech 2.6in thinwall FG
Owner: David Cain
Body Diameter: 2.60in
Dry Weight: 2,037g
MMT Diameter: 38.0mm
MMT Length: 40.0cm
CD: 0.58
Web Site: http://madcowrocketry.com/

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 2,218g 91ft/s 155ft/s 16.3G 380ft 5.0s 5s
OK Loki G94 2,277g 49ft/s 137ft/s 4.9G 381ft 5.4s 4s
OK Cesaroni G185 2,225g 63ft/s 167ft/s 8.5G 455ft 5.6s 5s
OK Cesaroni G115 2,232g 48ft/s 169ft/s 5.0G 514ft 6.2s 5s
OK Loki H100 2,372g 50ft/s 217ft/s 5.5G 900ft 8.1s 6s
warningsW AeroTech H283 2,284g 83ft/s 264ft/s 14.0G 1,027ft 8.1s 7s
OK AeroTech H148 2,346g 61ft/s 253ft/s 7.4G 1,065ft 8.6s 7s
OK AeroTech H130 2,274g 73ft/s 250ft/s 10.6G 1,099ft 8.6s 7s
OK AeroTech H123 2,312g 52ft/s 247ft/s 5.6G 1,175ft 9.2s 7s
OK Loki H90 2,372g 52ft/s 243ft/s 5.3G 1,182ft 9.3s 7s
OK AeroTech H669 2,289g 129ft/s 309ft/s 48.3G 1,250ft 8.7s 8s
OK Loki H125 2,379g 62ft/s 267ft/s 7.8G 1,273ft 9.4s 7s
OK Cesaroni H143 2,384g 50ft/s 283ft/s 6.2G 1,283ft 9.5s 8s
OK Loki H144 2,373g 70ft/s 278ft/s 9.7G 1,286ft 9.2s 8s
OK AeroTech H219 2,298g 76ft/s 304ft/s 12.0G 1,341ft 9.2s 8s
OK AeroTech H242 2,301g 68ft/s 307ft/s 9.6G 1,413ft 9.6s 8s
OK Loki H160 2,372g 74ft/s 303ft/s 11.4G 1,447ft 9.6s 8s
OK Cesaroni H120 2,332g 52ft/s 299ft/s 5.5G 1,476ft 10.2s 8s
OK Cesaroni H125 2,330g 50ft/s 311ft/s 5.8G 1,543ft 10.4s 8s
OK Cesaroni H400 2,321g 93ft/s 346ft/s 18.7G 1,546ft 9.7s 9s
OK Cesaroni H152 2,335g 57ft/s 331ft/s 8.3G 1,681ft 10.6s 9s
OK AeroTech H178 2,361g 56ft/s 347ft/s 8.5G 1,737ft 10.7s 9s
OK Cesaroni H225 2,230g 71ft/s 364ft/s 10.8G 1,773ft 10.6s 9s
OK AeroTech I218 2,409g 75ft/s 386ft/s 11.1G 2,030ft 11.3s 10s
OK AeroTech H170 2,367g 62ft/s 375ft/s 7.9G 2,039ft 11.5s 9s
OK AeroTech I180 2,422g 85ft/s 373ft/s 14.3G 2,089ft 11.4s 9s
OK AeroTech H550 2,360g 115ft/s 423ft/s 27.2G 2,092ft 11.0s 10s
OK AeroTech H550 2,353g 115ft/s 427ft/s 27.4G 2,111ft 11.0s 10s
warningsW Cesaroni H565 2,399g 113ft/s 429ft/s 27.2G 2,125ft 11.1s 11s
OK AeroTech I161 2,403g 63ft/s 379ft/s 8.3G 2,141ft 11.8s 10s
OK AeroTech H999 2,368g 154ft/s 442ft/s 68.2G 2,169ft 11.1s 11s
OK Cesaroni I180 2,431g 58ft/s 399ft/s 8.1G 2,190ft 11.9s 10s
OK AeroTech I140 2,393g 57ft/s 376ft/s 6.7G 2,197ft 12.1s 10s
OK AeroTech I225 2,523g 64ft/s 417ft/s 10.4G 2,332ft 12.1s 10s
OK AeroTech I245 2,402g 90ft/s 426ft/s 16.7G 2,369ft 11.9s 10s
OK Cesaroni I212 2,512g 61ft/s 428ft/s 9.7G 2,381ft 12.3s 11s
OK AeroTech I357 2,380g 87ft/s 438ft/s 15.3G 2,399ft 12.0s 11s
OK AeroTech I154 2,529g 52ft/s 387ft/s 5.8G 2,434ft 13.0s 10s
OK Cesaroni I566 2,421g 108ft/s 493ft/s 26.2G 2,598ft 12.1s 12s
OK Cesaroni I195 2,454g 66ft/s 459ft/s 8.9G 2,722ft 13.1s 11s
OK Cesaroni I345 2,432g 88ft/s 504ft/s 15.4G 2,830ft 12.8s 12s
OK Cesaroni I175 2,474g 60ft/s 463ft/s 7.1G 2,831ft 13.4s 11s
OK Cesaroni I170 2,429g 64ft/s 470ft/s 8.6G 2,834ft 13.3s 11s
OK AeroTech I285 2,530g 81ft/s 492ft/s 14.3G 2,852ft 13.0s 11s
OK Cesaroni I236 2,437g 72ft/s 495ft/s 12.0G 2,946ft 13.3s 12s
OK Cesaroni I800 2,494g 129ft/s 549ft/s 37.3G 2,970ft 12.8s 12s
OK Cesaroni I223 2,531g 65ft/s 502ft/s 9.5G 3,034ft 13.6s 12s
OK AeroTech I211 2,492g 76ft/s 488ft/s 12.1G 3,034ft 13.5s 11s
OK AeroTech I305 2,618g 83ft/s 509ft/s 15.2G 3,036ft 13.3s 12s
OK AeroTech I195 2,609g 78ft/s 485ft/s 13.2G 3,041ft 13.5s 11s
OK AeroTech I1299 2,459g 175ft/s 571ft/s 63.0G 3,081ft 12.9s 13s
OK AeroTech I300 2,478g 89ft/s 522ft/s 18.2G 3,110ft 13.4s 12s
warningsW Loki I110 2,626g 54ft/s 454ft/s 9.3G 3,290ft 14.7s 11s
OK AeroTech I59 2,524g 51ft/s 310ft/s 5.9G 3,301ft 16.2s 8s
OK Loki I316 2,577g 98ft/s 546ft/s 19.0G 3,350ft 13.7s 12s
OK Cesaroni I287 2,642g 74ft/s 562ft/s 12.7G 3,445ft 14.2s 12s
OK Loki I210 2,577g 83ft/s 529ft/s 16.5G 3,493ft 14.2s 12s
OK Loki I405 2,580g 117ft/s 591ft/s 30.8G 3,590ft 14.0s 13s
OK Cesaroni I285 2,543g 79ft/s 591ft/s 13.1G 3,721ft 14.6s 13s
OK Cesaroni I255 2,553g 75ft/s 589ft/s 11.7G 3,770ft 14.8s 13s
OK Loki I377 2,597g 105ft/s 606ft/s 24.8G 3,796ft 14.4s 13s
OK Loki I430 2,577g 96ft/s 633ft/s 20.1G 3,824ft 14.5s 13s
OK AeroTech I327 2,665g 85ft/s 618ft/s 15.5G 3,882ft 14.7s 13s
OK AMW I297 2,628g 80ft/s 613ft/s 13.5G 3,898ft 14.8s 13s
OK AeroTech I364 2,715g 82ft/s 618ft/s 15.1G 3,911ft 14.8s 13s
OK AeroTech I366 2,593g 95ft/s 630ft/s 18.2G 3,922ft 14.7s 13s
OK Cesaroni I303 2,537g 81ft/s 626ft/s 15.6G 3,997ft 14.9s 13s
OK Cesaroni I125 2,684g 61ft/s 510ft/s 9.2G 4,012ft 16.1s 12s
OK Cesaroni I470 2,532g 104ft/s 666ft/s 21.4G 4,014ft 14.7s 14s
OK Cesaroni I242 2,587g 71ft/s 612ft/s 10.3G 4,026ft 15.3s 13s
OK AeroTech I280 2,653g 75ft/s 626ft/s 12.0G 4,037ft 15.2s 13s
OK KBA I301 2,762g 78ft/s 672ft/s 14.3G 4,208ft 15.1s 13s
OK Cesaroni I350 2,819g 82ft/s 655ft/s 13.7G 4,213ft 15.3s 14s
OK AeroTech I435 2,555g 118ft/s 684ft/s 29.2G 4,251ft 15.0s 14s
OK KBA I550 2,749g 101ft/s 742ft/s 26.4G 4,280ft 14.8s 14s
OK AeroTech I284 2,593g 93ft/s 666ft/s 18.3G 4,334ft 15.3s 13s
OK AeroTech I500 2,613g 101ft/s 737ft/s 21.6G 4,624ft 15.5s 14s
OK Cesaroni I216 2,638g 75ft/s 653ft/s 12.1G 4,690ft 16.3s 13s
warningsW Cesaroni I540 2,635g 110ft/s 762ft/s 23.9G 4,707ft 15.6s 14s
OK AeroTech I600 2,639g 124ft/s 759ft/s 30.7G 4,724ft 15.6s 14s
OK AeroTech J420 2,687g 98ft/s 739ft/s 20.3G 4,758ft 15.9s 14s
OK Cesaroni J335 2,664g 87ft/s 722ft/s 14.8G 4,760ft 16.0s 14s
OK AeroTech I350 2,653g 88ft/s 745ft/s 18.2G 4,767ft 15.9s 14s
OK AeroTech J350 2,702g 117ft/s 740ft/s 30.1G 4,790ft 15.8s 14s
OK Cesaroni J270 2,692g 72ft/s 705ft/s 10.7G 4,798ft 16.4s 14s
OK KBA J740 2,761g 123ft/s 782ft/s 35.6G 4,808ft 15.7s 15s
OK Cesaroni J285 2,632g 82ft/s 709ft/s 13.5G 4,813ft 16.2s 14s
OK AeroTech J340 2,614g 100ft/s 735ft/s 22.4G 4,821ft 15.9s 14s
OK Cesaroni J316 2,644g 85ft/s 712ft/s 15.9G 4,837ft 16.2s 14s
OK Cesaroni J357 2,638g 93ft/s 749ft/s 18.9G 4,884ft 16.1s 14s
OK AeroTech J425 2,668g 88ft/s 789ft/s 16.8G 5,033ft 16.3s 15s
OK Cesaroni J290 2,697g 82ft/s 734ft/s 13.8G 5,035ft 16.6s 14s
OK AeroTech J270 2,679g 77ft/s 743ft/s 12.6G 5,189ft 16.8s 14s
OK AeroTech J500 2,691g 113ft/s 825ft/s 29.0G 5,316ft 16.4s 15s
OK AeroTech J435 2,661g 112ft/s 867ft/s 25.4G 5,712ft 16.9s 15s

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 G67 speed at end of launch guide too slow (39ft/s)
failedG Loki G69 speed at end of launch guide too slow (42ft/s)
failedG AeroTech G61 speed at end of launch guide too slow (37ft/s)
failedG Loki G70 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni G69 speed at end of launch guide too slow (36ft/s)
failedG Loki G80 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni G46 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni G79 speed at end of launch guide too slow (36ft/s)
failedG Loki G66 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni G60 speed at end of launch guide too slow (38ft/s)
failedG AeroTech G69 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni G78 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (27ft/s)
failedG AeroTech H73 speed at end of launch guide too slow (35ft/s)
failedG AeroTech H100 speed at end of launch guide too slow (47ft/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 (42ft/s)
failedG Cesaroni H110 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni H100 speed at end of launch guide too slow (45ft/s)
failedG AeroTech H45 speed at end of launch guide too slow (37ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (27ft/s)
failedG Cesaroni I55 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni J94 speed at end of launch guide too slow (47ft/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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