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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 94 motors that fit and appear to have enough thrust (703 motors didn't fit, 14 motors failed safety checks). 108 motor had thrust curves available and 232 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:   Black Brant II
Owner: Jeff Provost
Body Diameter: 2.66in
Dry Weight: 1,256g
MMT Diameter: 38.0mm
MMT Length: 360.0mm
CD: 0.47

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 Loki G69 1,496g 51ft/s 192ft/s 5.7G 690ft 7.0s 5s
OK Loki G70 1,498g 51ft/s 204ft/s 5.9G 776ft 7.5s 6s
OK Loki G80 1,511g 55ft/s 213ft/s 6.6G 801ft 7.4s 6s
OK AeroTech G339 1,437g 107ft/s 246ft/s 25.8G 829ft 7.1s 7s
OK Loki G94 1,496g 60ft/s 226ft/s 8.0G 859ft 7.6s 6s
OK Loki G66 1,506g 55ft/s 227ft/s 6.9G 971ft 8.3s 6s
OK Cesaroni G185 1,444g 74ft/s 270ft/s 13.7G 995ft 7.9s 7s
OK Cesaroni G115 1,451g 58ft/s 278ft/s 8.2G 1,133ft 8.6s 7s
OK Loki H100 1,591g 57ft/s 344ft/s 8.6G 1,752ft 10.6s 9s
warningsW AeroTech H283 1,503g 95ft/s 412ft/s 21.9G 1,908ft 10.5s 10s
OK AeroTech H148 1,565g 71ft/s 397ft/s 11.7G 1,995ft 11.0s 10s
OK AeroTech H130 1,493g 84ft/s 395ft/s 16.7G 2,048ft 11.0s 9s
OK AeroTech H669 1,508g 150ft/s 477ft/s 73.9G 2,197ft 10.9s 11s
OK AeroTech H123 1,531g 61ft/s 395ft/s 8.9G 2,202ft 11.7s 9s
OK Loki H90 1,591g 59ft/s 386ft/s 8.4G 2,215ft 11.9s 9s
OK AeroTech H100 1,517g 56ft/s 402ft/s 7.8G 2,216ft 11.8s 9s
OK Cesaroni H123 1,553g 55ft/s 432ft/s 8.9G 2,277ft 11.9s 10s
OK Loki H144 1,592g 81ft/s 427ft/s 14.9G 2,287ft 11.6s 10s
OK Loki H125 1,598g 71ft/s 415ft/s 12.1G 2,293ft 11.8s 10s
OK Cesaroni H143 1,603g 58ft/s 444ft/s 9.6G 2,326ft 11.9s 10s
OK AeroTech H219 1,517g 91ft/s 469ft/s 18.7G 2,351ft 11.5s 10s
OK AeroTech H242 1,520g 80ft/s 478ft/s 15.0G 2,478ft 11.9s 10s
OK Loki H160 1,591g 86ft/s 462ft/s 17.5G 2,495ft 11.9s 10s
OK AeroTech H112 1,635g 49ft/s 414ft/s 5.9G 2,506ft 12.9s 10s
OK Cesaroni H400 1,540g 106ft/s 534ft/s 28.8G 2,608ft 11.9s 11s
OK Cesaroni H120 1,551g 58ft/s 470ft/s 8.8G 2,625ft 12.6s 10s
OK Cesaroni H110 1,581g 52ft/s 464ft/s 7.1G 2,671ft 12.9s 10s
OK Cesaroni H125 1,549g 58ft/s 488ft/s 9.1G 2,708ft 12.8s 11s
OK Cesaroni H152 1,554g 67ft/s 514ft/s 12.9G 2,858ft 12.8s 11s
OK Cesaroni H100 1,583g 55ft/s 482ft/s 6.6G 2,880ft 13.4s 11s
OK AeroTech H178 1,580g 67ft/s 537ft/s 13.2G 2,904ft 12.9s 11s
OK Cesaroni H225 1,449g 86ft/s 574ft/s 17.2G 2,949ft 12.6s 11s
OK AeroTech I218 1,628g 86ft/s 582ft/s 17.0G 3,223ft 13.3s 12s
OK AeroTech H550 1,579g 137ft/s 642ft/s 41.4G 3,242ft 12.9s 12s
OK AeroTech H550 1,572g 137ft/s 651ft/s 41.8G 3,253ft 12.8s 12s
OK AeroTech H170 1,586g 72ft/s 574ft/s 12.3G 3,276ft 13.5s 11s
warningsW Cesaroni H565 1,618g 128ft/s 649ft/s 41.1G 3,276ft 13.0s 12s
OK AeroTech I180 1,641g 101ft/s 555ft/s 21.6G 3,285ft 13.4s 11s
OK AeroTech H999 1,587g 180ft/s 670ft/s 102.5G 3,310ft 12.9s 13s
OK AeroTech I161 1,622g 73ft/s 572ft/s 12.8G 3,391ft 13.7s 11s
OK AeroTech I175 1,604g 82ft/s 567ft/s 15.0G 3,415ft 13.9s 12s
OK Cesaroni I180 1,650g 67ft/s 603ft/s 12.4G 3,442ft 13.8s 12s
OK AeroTech I140 1,612g 67ft/s 570ft/s 10.5G 3,500ft 14.1s 12s
OK AeroTech I225 1,742g 73ft/s 618ft/s 15.6G 3,553ft 13.9s 12s
OK AeroTech I245 1,621g 98ft/s 635ft/s 25.3G 3,586ft 13.6s 12s
OK AeroTech I357 1,599g 101ft/s 658ft/s 23.3G 3,624ft 13.7s 12s
OK Cesaroni I212 1,731g 71ft/s 639ft/s 14.5G 3,633ft 14.1s 12s
OK AeroTech I154 1,748g 59ft/s 575ft/s 8.9G 3,798ft 14.9s 12s
OK Cesaroni I566 1,640g 119ft/s 742ft/s 39.1G 3,806ft 13.7s 13s
OK Cesaroni I195 1,673g 75ft/s 682ft/s 13.5G 4,047ft 14.7s 13s
OK Cesaroni I345 1,651g 98ft/s 752ft/s 23.1G 4,095ft 14.3s 13s
OK AeroTech I285 1,749g 92ft/s 720ft/s 21.2G 4,113ft 14.5s 13s
OK Cesaroni I800 1,713g 142ft/s 815ft/s 55.3G 4,174ft 14.2s 14s
OK Cesaroni I170 1,648g 73ft/s 698ft/s 13.0G 4,176ft 14.9s 12s
OK Cesaroni I175 1,694g 68ft/s 686ft/s 10.8G 4,183ft 15.0s 13s
OK AeroTech I305 1,837g 95ft/s 733ft/s 22.3G 4,254ft 14.6s 13s
OK Cesaroni I236 1,656g 85ft/s 733ft/s 18.2G 4,255ft 14.8s 13s
OK AeroTech I1299 1,678g 192ft/s 849ft/s 94.0G 4,268ft 14.1s 14s
OK AeroTech I195 1,828g 89ft/s 696ft/s 19.3G 4,320ft 15.0s 13s
OK AeroTech I211 1,711g 87ft/s 712ft/s 18.2G 4,331ft 14.9s 13s
OK Cesaroni I223 1,750g 73ft/s 737ft/s 14.2G 4,343ft 15.0s 13s
OK AeroTech I300 1,697g 104ft/s 764ft/s 27.0G 4,379ft 14.7s 13s
OK Loki I316 1,796g 108ft/s 781ft/s 27.8G 4,614ft 15.0s 14s
OK Cesaroni I287 1,861g 81ft/s 809ft/s 18.5G 4,722ft 15.4s 14s
warningsW Loki I110 1,845g 63ft/s 649ft/s 13.6G 4,735ft 16.2s 12s
OK Loki I210 1,796g 96ft/s 751ft/s 24.1G 4,814ft 15.5s 13s
OK Loki I405 1,799g 132ft/s 844ft/s 44.6G 4,821ft 15.1s 14s
OK Cesaroni I285 1,762g 91ft/s 853ft/s 19.5G 5,021ft 15.7s 14s
OK Loki I377 1,816g 122ft/s 860ft/s 36.0G 5,058ft 15.5s 14s
OK Cesaroni I255 1,772g 85ft/s 848ft/s 17.4G 5,091ft 15.8s 14s
OK Loki I430 1,796g 108ft/s 915ft/s 29.2G 5,102ft 15.6s 14s
OK AeroTech I59 1,743g 60ft/s 458ft/s 9.0G 5,122ft 18.2s 10s
OK AeroTech I327 1,884g 97ft/s 879ft/s 22.4G 5,129ft 15.7s 14s
OK AeroTech I364 1,934g 93ft/s 874ft/s 21.7G 5,148ft 15.7s 14s
OK AMW I297 1,847g 93ft/s 876ft/s 19.6G 5,168ft 15.8s 14s
OK AeroTech I366 1,812g 106ft/s 902ft/s 26.6G 5,170ft 15.6s 14s
OK Cesaroni I470 1,751g 115ft/s 966ft/s 31.5G 5,251ft 15.6s 14s
OK Cesaroni I303 1,756g 94ft/s 900ft/s 23.0G 5,280ft 15.8s 14s
OK AeroTech I280 1,872g 88ft/s 892ft/s 17.4G 5,322ft 16.1s 14s
OK Cesaroni I242 1,806g 82ft/s 875ft/s 15.1G 5,357ft 16.3s 14s
OK AeroTech I435 1,774g 133ft/s 977ft/s 42.5G 5,453ft 15.7s 14s
OK Cesaroni I350 2,038g 90ft/s 916ft/s 19.3G 5,477ft 16.3s 15s
OK AeroTech I284 1,812g 104ft/s 942ft/s 26.7G 5,566ft 16.0s 14s
OK AeroTech I500 1,832g 110ft/s 1,049ft/s 31.2G 5,812ft 16.1s 15s
OK AeroTech I600 1,858g 139ft/s 1,076ft/s 44.1G 5,882ft 16.1s 15s
OK AeroTech J350 1,921g 133ft/s 1,033ft/s 42.7G 5,959ft 16.3s 15s
OK AeroTech J420 1,906g 110ft/s 1,037ft/s 29.1G 5,971ft 16.5s 15s
OK AeroTech I350 1,872g 98ft/s 1,054ft/s 26.3G 5,975ft 16.5s 15s
OK AeroTech J340 1,833g 111ft/s 1,034ft/s 32.5G 5,990ft 16.3s 14s
OK Cesaroni J285 1,851g 90ft/s 994ft/s 19.6G 6,094ft 16.8s 15s
OK Cesaroni J357 1,857g 105ft/s 1,054ft/s 27.3G 6,101ft 16.6s 15s
OK AeroTech J425 1,887g 93ft/s 1,118ft/s 24.0G 6,233ft 16.7s 15s
OK AeroTech J270 1,898g 89ft/s 1,028ft/s 18.2G 6,440ft 17.2s 15s
OK AeroTech J500 1,910g 127ft/s 1,150ft/s 41.4G 6,451ft 16.7s 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 (47ft/s)
failedG AeroTech G61 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni G69 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni G46 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni G79 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni G60 speed at end of launch guide too slow (46ft/s)
failedG AeroTech G69 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni G78 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (34ft/s)
failedG AeroTech H73 speed at end of launch guide too slow (43ft/s)
failedG AeroTech H45 speed at end of launch guide too slow (45ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (33ft/s)
failedG Cesaroni I55 speed at end of launch guide too slow (36ft/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.)

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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