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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 102 motors that fit and appear to have enough thrust (634 motors didn't fit, 69 motors failed safety checks). 171 motor had thrust curves available and 349 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:   Yee ha 38mm
Owner: Jim Fields
Body Diameter: 3.00in
Dry Weight: 8.00lb
MMT Diameter: 38.0mm
MMT Length: 30.00in
CD: 0.45

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 9.30lb 69ft/s 115ft/s 17.8G 248ft 4.1s 3s
OK Contrail H211 9.32lb 62ft/s 131ft/s 14.2G 347ft 4.9s 4s
warningsW AeroTech H283 8.54lb 54ft/s 146ft/s 7.8G 378ft 5.1s 4s
OK Contrail H246 9.32lb 61ft/s 145ft/s 11.8G 401ft 5.2s 4s
OK AeroTech H669 8.56lb 86ft/s 177ft/s 28.1G 491ft 5.6s 5s
OK Contrail H248 9.75lb 58ft/s 162ft/s 15.0G 505ft 5.9s 5s
OK AeroTech H219 8.58lb 50ft/s 166ft/s 6.7G 507ft 6.0s 5s
OK Loki H160 8.74lb 49ft/s 166ft/s 6.4G 565ft 6.4s 5s
OK Cesaroni H400 8.63lb 61ft/s 196ft/s 10.6G 621ft 6.5s 6s
OK Contrail H277 9.57lb 63ft/s 187ft/s 16.8G 654ft 6.7s 6s
OK Contrail H340 9.80lb 64ft/s 197ft/s 19.6G 688ft 6.8s 6s
OK Contrail I500 9.76lb 85ft/s 227ft/s 22.4G 851ft 7.4s 7s
OK AeroTech I218 8.82lb 49ft/s 216ft/s 6.3G 854ft 7.8s 6s
OK AeroTech I180 8.85lb 56ft/s 209ft/s 8.2G 893ft 8.0s 6s
OK AeroTech H550 8.71lb 78ft/s 245ft/s 15.7G 925ft 7.7s 7s
OK Contrail I221 9.57lb 61ft/s 218ft/s 10.3G 933ft 8.1s 6s
OK AeroTech H550 8.70lb 78ft/s 246ft/s 15.8G 933ft 7.8s 7s
warningsW Cesaroni H565 8.80lb 74ft/s 249ft/s 15.8G 946ft 7.8s 7s
OK AeroTech H999 8.73lb 102ft/s 258ft/s 40.4G 982ft 7.8s 7s
OK AeroTech I245 8.80lb 61ft/s 244ft/s 9.6G 1,062ft 8.5s 7s
OK AeroTech I357 8.76lb 57ft/s 250ft/s 8.7G 1,073ft 8.6s 7s
OK Cesaroni I566 8.85lb 72ft/s 287ft/s 15.3G 1,226ft 8.9s 8s
OK Contrail I250 9.60lb 59ft/s 269ft/s 12.4G 1,310ft 9.4s 8s
OK Cesaroni I345 8.87lb 56ft/s 292ft/s 8.9G 1,345ft 9.5s 8s
OK Contrail I747 9.85lb 120ft/s 303ft/s 42.3G 1,356ft 9.1s 9s
OK AeroTech I285 9.09lb 54ft/s 288ft/s 8.3G 1,371ft 9.7s 8s
OK AeroTech I211 9.00lb 49ft/s 282ft/s 7.0G 1,456ft 10.2s 8s
OK AeroTech I195 9.26lb 52ft/s 285ft/s 7.8G 1,489ft 10.2s 8s
OK Cesaroni I800 9.01lb 86ft/s 325ft/s 22.1G 1,494ft 9.7s 9s
OK AeroTech I305 9.28lb 57ft/s 303ft/s 9.0G 1,525ft 10.1s 9s
OK AeroTech I300 8.97lb 59ft/s 305ft/s 10.7G 1,538ft 10.2s 9s
OK AeroTech I1299 8.93lb 117ft/s 339ft/s 37.4G 1,585ft 9.8s 10s
OK Loki I316 9.19lb 66ft/s 327ft/s 11.3G 1,740ft 10.7s 9s
OK Cesaroni I287 9.33lb 49ft/s 333ft/s 7.6G 1,778ft 11.0s 9s
OK Loki I210 9.19lb 57ft/s 315ft/s 9.8G 1,801ft 11.1s 9s
OK Loki I405 9.20lb 81ft/s 357ft/s 18.6G 1,942ft 11.1s 10s
OK Cesaroni I285 9.12lb 52ft/s 349ft/s 7.7G 1,954ft 11.6s 10s
OK Cesaroni I255 9.14lb 50ft/s 347ft/s 6.8G 1,975ft 11.7s 10s
OK Loki I377 9.23lb 71ft/s 367ft/s 15.0G 2,079ft 11.5s 10s
OK Loki I430 9.19lb 64ft/s 379ft/s 12.0G 2,080ft 11.6s 10s
OK AMW I297 9.30lb 54ft/s 367ft/s 8.0G 2,122ft 11.9s 10s
OK AeroTech I327 9.38lb 56ft/s 372ft/s 9.3G 2,135ft 11.9s 10s
OK AeroTech I366 9.22lb 65ft/s 379ft/s 10.9G 2,161ft 11.8s 10s
OK AeroTech I364 9.49lb 55ft/s 375ft/s 9.1G 2,167ft 11.9s 10s
OK Cesaroni I303 9.10lb 55ft/s 372ft/s 9.2G 2,176ft 12.0s 10s
OK AeroTech I280 9.36lb 51ft/s 375ft/s 7.1G 2,212ft 12.3s 10s
OK Cesaroni I470 9.09lb 70ft/s 398ft/s 12.8G 2,240ft 11.9s 11s
OK Cesaroni I350 9.72lb 57ft/s 402ft/s 8.4G 2,414ft 12.6s 11s
OK AeroTech I435 9.14lb 78ft/s 414ft/s 17.6G 2,459ft 12.4s 11s
OK KBA I301 9.60lb 51ft/s 405ft/s 8.6G 2,471ft 12.8s 11s
OK AeroTech I284 9.22lb 62ft/s 404ft/s 10.9G 2,492ft 12.7s 11s
OK KBA I550 9.57lb 70ft/s 444ft/s 15.6G 2,599ft 12.7s 12s
OK Cesaroni I216 9.32lb 48ft/s 397ft/s 7.2G 2,687ft 13.6s 11s
OK AeroTech I500 9.27lb 69ft/s 449ft/s 13.1G 2,773ft 13.1s 12s
OK Loki J396 9.66lb 57ft/s 445ft/s 12.0G 2,800ft 13.3s 12s
OK Cesaroni J270 9.44lb 48ft/s 428ft/s 6.3G 2,810ft 13.8s 11s
OK KBA J520 9.59lb 70ft/s 456ft/s 15.7G 2,815ft 13.3s 12s
OK Cesaroni J335 9.38lb 57ft/s 441ft/s 8.8G 2,840ft 13.6s 12s
OK Cesaroni J285 9.31lb 53ft/s 433ft/s 8.0G 2,848ft 13.7s 11s
warningsW Cesaroni I540 9.32lb 75ft/s 464ft/s 14.4G 2,862ft 13.3s 12s
OK Cesaroni J316 9.34lb 56ft/s 437ft/s 9.5G 2,869ft 13.7s 12s
OK AeroTech I350 9.36lb 62ft/s 455ft/s 10.9G 2,871ft 13.5s 12s
OK AeroTech J420 9.43lb 66ft/s 454ft/s 12.3G 2,881ft 13.5s 12s
OK AeroTech I600 9.33lb 81ft/s 466ft/s 18.7G 2,894ft 13.3s 12s
OK Cesaroni J381 9.52lb 63ft/s 451ft/s 10.9G 2,903ft 13.6s 12s
OK AeroTech J340 9.27lb 66ft/s 450ft/s 13.6G 2,934ft 13.6s 11s
OK AeroTech J350 9.47lb 76ft/s 458ft/s 18.5G 2,949ft 13.5s 12s
OK Cesaroni J357 9.32lb 62ft/s 457ft/s 11.4G 2,959ft 13.7s 12s
OK KBA J740 9.60lb 87ft/s 486ft/s 22.2G 2,986ft 13.4s 13s
OK Cesaroni J290 9.45lb 54ft/s 452ft/s 8.3G 3,053ft 14.2s 12s
OK AeroTech J520 9.67lb 87ft/s 471ft/s 19.8G 3,073ft 13.7s 12s
OK AeroTech J425 9.39lb 58ft/s 480ft/s 10.2G 3,098ft 14.0s 12s
OK AeroTech J270 9.42lb 53ft/s 458ft/s 7.6G 3,181ft 14.5s 12s
OK Cesaroni J400 9.55lb 62ft/s 481ft/s 10.5G 3,186ft 14.2s 12s
OK Loki J474 9.67lb 88ft/s 480ft/s 26.8G 3,235ft 14.0s 12s
OK Loki J326 9.69lb 73ft/s 473ft/s 21.6G 3,392ft 14.6s 12s
OK AeroTech J500 9.44lb 79ft/s 513ft/s 17.8G 3,431ft 14.4s 13s
OK Loki J528 9.64lb 85ft/s 527ft/s 22.8G 3,524ft 14.5s 13s
OK Cesaroni J330 9.55lb 62ft/s 507ft/s 9.8G 3,618ft 15.1s 13s
OK Cesaroni J410 9.62lb 64ft/s 528ft/s 10.9G 3,694ft 15.1s 13s
OK AeroTech J575 10.02lb 86ft/s 547ft/s 18.9G 3,755ft 14.9s 14s
OK AeroTech J435 9.38lb 72ft/s 541ft/s 15.5G 3,786ft 15.2s 13s
OK Cesaroni J425 9.54lb 69ft/s 535ft/s 14.8G 3,787ft 15.2s 13s
OK Loki J320 9.66lb 62ft/s 521ft/s 11.3G 3,846ft 15.6s 13s
OK Loki J712 9.66lb 81ft/s 570ft/s 19.5G 3,902ft 15.1s 14s
OK Cesaroni J354 9.72lb 61ft/s 535ft/s 11.0G 3,935ft 15.7s 13s
OK Cesaroni J520 9.87lb 69ft/s 578ft/s 13.9G 4,128ft 15.8s 14s
OK Cesaroni J580 10.30lb 72ft/s 597ft/s 14.9G 4,297ft 16.0s 14s
OK Loki J650 10.52lb 78ft/s 621ft/s 19.7G 4,555ft 16.3s 15s
OK Cesaroni J394 10.07lb 58ft/s 628ft/s 10.2G 4,881ft 17.3s 15s
OK AeroTech J825 9.93lb 96ft/s 683ft/s 25.6G 4,958ft 16.7s 16s
OK Cesaroni J595 9.91lb 81ft/s 671ft/s 19.6G 5,095ft 17.1s 15s
OK Cesaroni J600 10.00lb 75ft/s 680ft/s 15.8G 5,144ft 17.2s 16s
OK Cesaroni J420 9.93lb 75ft/s 644ft/s 16.7G 5,168ft 17.4s 15s
OK Cesaroni J453 10.13lb 72ft/s 654ft/s 15.1G 5,175ft 17.5s 15s
OK AeroTech J570 9.99lb 94ft/s 670ft/s 24.9G 5,325ft 17.4s 15s
OK Cesaroni J530 10.15lb 78ft/s 724ft/s 16.8G 5,837ft 18.2s 16s
OK AeroTech J510 10.38lb 86ft/s 740ft/s 21.5G 6,115ft 18.5s 16s
OK Loki J1000 10.52lb 107ft/s 811ft/s 28.9G 6,345ft 18.5s 17s
OK Loki J1026 10.58lb 96ft/s 846ft/s 25.4G 6,643ft 18.9s 18s
OK Loki K1127 10.58lb 101ft/s 847ft/s 29.7G 6,729ft 19.0s 18s
OK Loki K627 10.72lb 89ft/s 923ft/s 19.8G 8,116ft 20.8s 18s

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 Contrail G130 speed at end of launch guide too slow (39ft/s)
failedA AeroTech G339 rocket doesn't reach a safe altitude (127ft)
failedG AeroTech G67 speed at end of launch guide too slow (23ft/s)
failedG Loki G69 speed at end of launch guide too slow (24ft/s)
failedG AeroTech G61 speed at end of launch guide too slow (21ft/s)
failedA Contrail G234 rocket doesn't reach a safe altitude (118ft)
failedG Loki G70 speed at end of launch guide too slow (25ft/s)
failedG Loki G94 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni G69 speed at end of launch guide too slow (20ft/s)
failedG Loki G80 speed at end of launch guide too slow (28ft/s)
failedG Cesaroni G46 speed at end of launch guide too slow (14ft/s)
failedG Cesaroni G185 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni G79 speed at end of launch guide too slow (21ft/s)
failedG Loki G66 speed at end of launch guide too slow (27ft/s)
failedG Cesaroni G60 speed at end of launch guide too slow (21ft/s)
failedG AeroTech G69 speed at end of launch guide too slow (21ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (16ft/s)
failedG Cesaroni G115 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni G78 speed at end of launch guide too slow (22ft/s)
failedG Contrail G123 speed at end of launch guide too slow (38ft/s)
failedG Contrail G100 speed at end of launch guide too slow (36ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (14ft/s)
failedA Contrail G300 rocket doesn't reach a safe altitude (89ft)
failedA Contrail H222 rocket doesn't reach a safe altitude (214ft)
failedA Contrail H300 rocket doesn't reach a safe altitude (217ft)
failedG AeroTech H73 speed at end of launch guide too slow (20ft/s)
failedG Loki H100 speed at end of launch guide too slow (31ft/s)
failedG AeroTech H148 speed at end of launch guide too slow (39ft/s)
failedG AeroTech H130 speed at end of launch guide too slow (46ft/s)
failedG AeroTech H123 speed at end of launch guide too slow (32ft/s)
failedG Contrail H121 speed at end of launch guide too slow (38ft/s)
failedG AeroTech H100 speed at end of launch guide too slow (29ft/s)
failedG AeroTech H242 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni H123 speed at end of launch guide too slow (30ft/s)
failedG Loki H90 speed at end of launch guide too slow (31ft/s)
failedG Loki H144 speed at end of launch guide too slow (45ft/s)
failedG Loki H125 speed at end of launch guide too slow (38ft/s)
failedG Contrail H141 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni H143 speed at end of launch guide too slow (31ft/s)
failedG Cesaroni H120 speed at end of launch guide too slow (32ft/s)
failedG AeroTech H112 speed at end of launch guide too slow (25ft/s)
failedG Cesaroni H110 speed at end of launch guide too slow (28ft/s)
failedG Cesaroni H225 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni H152 speed at end of launch guide too slow (37ft/s)
failedG AeroTech H178 speed at end of launch guide too slow (35ft/s)
failedG Cesaroni H125 speed at end of launch guide too slow (31ft/s)
failedG Cesaroni H100 speed at end of launch guide too slow (27ft/s)
failedG AeroTech H170 speed at end of launch guide too slow (38ft/s)
failedG AeroTech H45 speed at end of launch guide too slow (21ft/s)
failedG AeroTech I161 speed at end of launch guide too slow (41ft/s)
failedG AeroTech I140 speed at end of launch guide too slow (36ft/s)
failedG Cesaroni I180 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni I212 speed at end of launch guide too slow (41ft/s)
failedG AeroTech I225 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni I195 speed at end of launch guide too slow (43ft/s)
failedG AeroTech I154 speed at end of launch guide too slow (33ft/s)
failedG Cesaroni I170 speed at end of launch guide too slow (41ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (14ft/s)
failedG Cesaroni I55 speed at end of launch guide too slow (16ft/s)
failedG Cesaroni I175 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni I236 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni I223 speed at end of launch guide too slow (43ft/s)
failedG AeroTech I59 speed at end of launch guide too slow (33ft/s)
failedG Loki I110 speed at end of launch guide too slow (35ft/s)
failedG Contrail I155 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni I242 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni I125 speed at end of launch guide too slow (39ft/s)
failedG Cesaroni J94 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni J150 speed at end of launch guide too slow (42ft/s)

G These simulations were run with a launch guide length of 6ft (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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