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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 (666 motors didn't fit, 34 motors failed safety checks). 136 motor had thrust curves available and 284 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:   Darkstar Jr
Owner: paul shepherdson
Body Diameter: 2.10in
Dry Weight: 1.870Kg
MMT Diameter: 38.0mm
MMT Length: 18.00in
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 G130 2.386Kg 57ft/s 115ft/s 21.9G 264ft 4.3s 3s
OK Contrail G300 2.414Kg 103ft/s 129ft/s 33.4G 270ft 4.1s 4s
OK Contrail G234 2.414Kg 90ft/s 145ft/s 22.0G 363ft 4.9s 4s
OK AeroTech G339 2.051Kg 82ft/s 169ft/s 17.8G 446ft 5.4s 5s
OK Contrail G123 2.381Kg 55ft/s 161ft/s 14.3G 494ft 5.9s 5s
OK Contrail G100 2.381Kg 51ft/s 158ft/s 6.8G 511ft 6.0s 5s
OK Cesaroni G185 2.058Kg 55ft/s 183ft/s 9.3G 536ft 6.0s 5s
OK Contrail H222 2.390Kg 79ft/s 196ft/s 27.9G 642ft 6.4s 6s
warningsW AeroTech H283 2.117Kg 73ft/s 287ft/s 15.2G 1,193ft 8.7s 8s
OK AeroTech H148 2.179Kg 54ft/s 276ft/s 8.1G 1,240ft 9.2s 8s
OK AeroTech H130 2.107Kg 65ft/s 274ft/s 11.6G 1,280ft 9.2s 8s
OK AeroTech H669 2.122Kg 117ft/s 335ft/s 52.2G 1,445ft 9.3s 9s
OK Loki H125 2.212Kg 54ft/s 292ft/s 8.5G 1,476ft 10.0s 8s
OK Loki H144 2.206Kg 64ft/s 303ft/s 10.5G 1,488ft 9.8s 8s
OK AeroTech H219 2.131Kg 67ft/s 331ft/s 13.0G 1,555ft 9.9s 9s
OK AeroTech H242 2.134Kg 61ft/s 334ft/s 10.4G 1,638ft 10.3s 9s
OK Loki H160 2.205Kg 68ft/s 329ft/s 12.3G 1,670ft 10.3s 9s
OK Cesaroni H400 2.154Kg 82ft/s 375ft/s 20.2G 1,784ft 10.4s 10s
OK Cesaroni H152 2.168Kg 53ft/s 362ft/s 9.0G 1,946ft 11.3s 10s
OK AeroTech H178 2.194Kg 50ft/s 378ft/s 9.2G 2,007ft 11.4s 10s
OK Cesaroni H225 2.063Kg 66ft/s 398ft/s 11.7G 2,054ft 11.3s 10s
OK AeroTech I218 2.242Kg 66ft/s 419ft/s 12.1G 2,331ft 12.0s 11s
OK AeroTech H170 2.200Kg 55ft/s 410ft/s 8.6G 2,349ft 12.3s 10s
OK AeroTech I180 2.255Kg 77ft/s 405ft/s 15.4G 2,394ft 12.1s 10s
OK AeroTech H550 2.193Kg 102ft/s 458ft/s 29.4G 2,398ft 11.7s 11s
OK AeroTech H550 2.186Kg 103ft/s 463ft/s 29.6G 2,421ft 11.8s 11s
warningsW Cesaroni H565 2.232Kg 102ft/s 464ft/s 29.5G 2,434ft 11.9s 11s
OK AeroTech I161 2.236Kg 57ft/s 413ft/s 9.1G 2,462ft 12.5s 10s
OK AeroTech H999 2.201Kg 139ft/s 478ft/s 73.5G 2,483ft 11.8s 12s
OK Cesaroni I180 2.264Kg 51ft/s 434ft/s 8.9G 2,515ft 12.7s 11s
OK AeroTech I140 2.226Kg 51ft/s 411ft/s 7.3G 2,530ft 12.9s 10s
OK AeroTech I225 2.356Kg 57ft/s 452ft/s 11.3G 2,666ft 12.8s 11s
OK AeroTech I245 2.235Kg 80ft/s 463ft/s 18.0G 2,711ft 12.7s 11s
OK Cesaroni I212 2.345Kg 56ft/s 465ft/s 10.5G 2,725ft 13.0s 11s
OK AeroTech I357 2.213Kg 79ft/s 475ft/s 16.5G 2,746ft 12.7s 11s
OK Cesaroni I566 2.254Kg 95ft/s 533ft/s 28.4G 2,966ft 12.9s 12s
OK Cesaroni I195 2.287Kg 59ft/s 499ft/s 9.6G 3,112ft 13.8s 12s
OK Cesaroni I345 2.265Kg 75ft/s 546ft/s 16.6G 3,228ft 13.6s 12s
OK Cesaroni I175 2.308Kg 53ft/s 504ft/s 7.7G 3,236ft 14.2s 12s
OK Cesaroni I170 2.262Kg 57ft/s 511ft/s 9.3G 3,240ft 14.1s 12s
OK AeroTech I285 2.363Kg 72ft/s 532ft/s 15.4G 3,245ft 13.8s 12s
OK Cesaroni I236 2.270Kg 64ft/s 538ft/s 13.0G 3,361ft 14.1s 12s
OK Cesaroni I800 2.327Kg 115ft/s 592ft/s 40.3G 3,377ft 13.6s 13s
OK AeroTech I305 2.451Kg 75ft/s 549ft/s 16.4G 3,443ft 14.0s 12s
OK AeroTech I195 2.442Kg 70ft/s 525ft/s 14.2G 3,451ft 14.3s 12s
OK AeroTech I211 2.325Kg 67ft/s 529ft/s 13.1G 3,454ft 14.3s 12s
OK Cesaroni I223 2.364Kg 58ft/s 545ft/s 10.3G 3,455ft 14.4s 12s
OK AeroTech I1299 2.292Kg 153ft/s 615ft/s 67.9G 3,500ft 13.7s 13s
OK AeroTech I300 2.311Kg 81ft/s 565ft/s 19.5G 3,536ft 14.2s 13s
warningsW Loki I110 2.459Kg 49ft/s 494ft/s 10.0G 3,741ft 15.5s 12s
OK Loki I316 2.410Kg 86ft/s 589ft/s 20.4G 3,795ft 14.6s 13s
OK Cesaroni I287 2.475Kg 65ft/s 606ft/s 13.7G 3,903ft 15.0s 13s
OK Loki I210 2.410Kg 75ft/s 572ft/s 17.7G 3,957ft 15.0s 13s
OK Loki I405 2.413Kg 106ft/s 636ft/s 33.0G 4,060ft 14.8s 14s
OK Cesaroni I285 2.376Kg 69ft/s 640ft/s 14.1G 4,219ft 15.5s 14s
OK Cesaroni I255 2.386Kg 65ft/s 638ft/s 12.6G 4,273ft 15.6s 14s
OK Loki I377 2.430Kg 97ft/s 653ft/s 26.6G 4,290ft 15.3s 14s
OK Loki I430 2.410Kg 85ft/s 682ft/s 21.5G 4,327ft 15.3s 14s
OK AeroTech I327 2.498Kg 77ft/s 666ft/s 16.6G 4,385ft 15.6s 14s
OK AMW I297 2.461Kg 73ft/s 662ft/s 14.5G 4,406ft 15.7s 14s
OK AeroTech I364 2.548Kg 74ft/s 666ft/s 16.2G 4,414ft 15.6s 14s
OK AeroTech I366 2.426Kg 84ft/s 680ft/s 19.6G 4,434ft 15.5s 14s
OK Cesaroni I303 2.370Kg 73ft/s 677ft/s 16.8G 4,523ft 15.8s 14s
OK Cesaroni I470 2.365Kg 91ft/s 718ft/s 23.0G 4,541ft 15.5s 14s
OK Cesaroni I125 2.517Kg 56ft/s 555ft/s 9.8G 4,544ft 16.9s 12s
OK Cesaroni I242 2.420Kg 63ft/s 663ft/s 11.0G 4,557ft 16.2s 14s
OK AeroTech I280 2.486Kg 69ft/s 677ft/s 12.8G 4,563ft 16.0s 14s
OK KBA I301 2.596Kg 67ft/s 727ft/s 15.3G 4,730ft 15.9s 14s
OK Cesaroni I350 2.652Kg 72ft/s 704ft/s 14.7G 4,745ft 16.2s 14s
OK AeroTech I435 2.388Kg 104ft/s 737ft/s 31.3G 4,798ft 15.8s 15s
OK KBA I550 2.582Kg 94ft/s 801ft/s 28.6G 4,812ft 15.6s 15s
OK AeroTech I284 2.426Kg 82ft/s 719ft/s 19.7G 4,890ft 16.2s 14s
OK AeroTech I500 2.446Kg 88ft/s 794ft/s 23.3G 5,211ft 16.4s 15s
OK KBA J520 2.592Kg 88ft/s 791ft/s 27.0G 5,243ft 16.6s 15s
OK Loki J396 2.622Kg 76ft/s 772ft/s 20.9G 5,247ft 16.7s 15s
OK Cesaroni I216 2.471Kg 66ft/s 707ft/s 13.0G 5,289ft 17.2s 14s
warningsW Cesaroni I540 2.468Kg 94ft/s 820ft/s 25.7G 5,302ft 16.5s 15s
OK AeroTech I600 2.472Kg 113ft/s 817ft/s 32.9G 5,318ft 16.5s 15s
OK AeroTech J420 2.520Kg 89ft/s 796ft/s 21.7G 5,356ft 16.8s 15s
OK Cesaroni J335 2.497Kg 78ft/s 778ft/s 15.9G 5,361ft 16.9s 15s
OK AeroTech I350 2.486Kg 78ft/s 804ft/s 19.5G 5,369ft 16.8s 15s
OK Cesaroni J381 2.558Kg 83ft/s 788ft/s 19.2G 5,372ft 16.8s 15s
OK AeroTech J350 2.535Kg 104ft/s 796ft/s 32.1G 5,385ft 16.6s 15s
OK Cesaroni J270 2.525Kg 64ft/s 761ft/s 11.5G 5,407ft 17.2s 15s
OK KBA J740 2.594Kg 113ft/s 838ft/s 38.3G 5,408ft 16.6s 16s
OK AeroTech J340 2.447Kg 88ft/s 793ft/s 24.0G 5,423ft 16.8s 15s
OK Cesaroni J285 2.465Kg 71ft/s 766ft/s 14.5G 5,424ft 17.1s 15s
OK Cesaroni J316 2.477Kg 76ft/s 768ft/s 17.0G 5,450ft 17.1s 15s
OK Cesaroni J357 2.471Kg 83ft/s 808ft/s 20.2G 5,499ft 17.0s 15s
OK Cesaroni J290 2.530Kg 75ft/s 792ft/s 14.8G 5,665ft 17.4s 15s
OK AeroTech J425 2.501Kg 74ft/s 851ft/s 18.1G 5,666ft 17.2s 16s
OK Cesaroni J400 2.572Kg 81ft/s 836ft/s 18.5G 5,733ft 17.3s 15s
OK AeroTech J270 2.512Kg 70ft/s 802ft/s 13.5G 5,836ft 17.6s 15s
OK AeroTech J500 2.524Kg 104ft/s 888ft/s 31.0G 5,972ft 17.3s 16s
OK Loki J528 2.615Kg 116ft/s 899ft/s 38.8G 6,027ft 17.3s 16s
OK Cesaroni J330 2.572Kg 82ft/s 871ft/s 17.3G 6,292ft 18.0s 16s
OK Cesaroni J410 2.605Kg 85ft/s 905ft/s 19.0G 6,326ft 17.9s 16s
OK Cesaroni J425 2.570Kg 94ft/s 917ft/s 25.6G 6,397ft 17.9s 16s
OK AeroTech J435 2.494Kg 95ft/s 934ft/s 27.2G 6,412ft 17.8s 16s
OK Loki J712 2.622Kg 109ft/s 971ft/s 33.2G 6,472ft 17.8s 17s
OK Loki J320 2.622Kg 82ft/s 886ft/s 19.6G 6,583ft 18.4s 16s
OK Cesaroni J354 2.648Kg 85ft/s 906ft/s 19.1G 6,615ft 18.3s 16s

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 (36ft/s)
failedG Loki G69 speed at end of launch guide too slow (38ft/s)
failedG AeroTech G61 speed at end of launch guide too slow (33ft/s)
failedG Loki G70 speed at end of launch guide too slow (38ft/s)
failedG Loki G94 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni G69 speed at end of launch guide too slow (33ft/s)
failedG Loki G80 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni G46 speed at end of launch guide too slow (27ft/s)
failedG Cesaroni G79 speed at end of launch guide too slow (32ft/s)
failedG Loki G66 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni G60 speed at end of launch guide too slow (34ft/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 (43ft/s)
failedG Cesaroni G78 speed at end of launch guide too slow (35ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (25ft/s)
failedG AeroTech H73 speed at end of launch guide too slow (32ft/s)
failedG Loki H100 speed at end of launch guide too slow (44ft/s)
failedG AeroTech H123 speed at end of launch guide too slow (47ft/s)
failedG AeroTech H100 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni H123 speed at end of launch guide too slow (42ft/s)
failedG Loki H90 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni H143 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni H120 speed at end of launch guide too slow (45ft/s)
failedG AeroTech H112 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni H110 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni H125 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni H100 speed at end of launch guide too slow (41ft/s)
failedG AeroTech H45 speed at end of launch guide too slow (33ft/s)
failedG AeroTech I154 speed at end of launch guide too slow (46ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (24ft/s)
failedG Cesaroni I55 speed at end of launch guide too slow (27ft/s)
failedG AeroTech I59 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni J94 speed at end of launch guide too slow (44ft/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.)

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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