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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 78 motors that fit and appear to have enough thrust (677 motors didn't fit, 36 motors failed safety checks). 112 motor had thrust curves available and 223 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:   North Coast Archer 4 inch
Owner: Louie Berlin
Body Diameter: 4.00in
Dry Weight: 2.12lb
MMT Diameter: 29.0mm
MMT Length: 36.00in
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 Cesaroni F120 2.35lb 67ft/s 155ft/s 12.6G 303ft 4.4s 4s
OK AeroTech F52 2.39lb 48ft/s 164ft/s 6.4G 428ft 5.4s 4s
warningsW Estes F50 2.30lb 49ft/s 180ft/s 6.6G 479ft 5.6s 4s
OK AeroTech G54 2.42lb 48ft/s 179ft/s 6.5G 488ft 5.7s 4s
OK Cesaroni G88 2.45lb 54ft/s 208ft/s 9.7G 514ft 5.6s 5s
OK AeroTech G104 2.42lb 63ft/s 212ft/s 10.3G 532ft 5.6s 5s
OK AeroTech G74 2.31lb 53ft/s 216ft/s 7.7G 547ft 5.8s 5s
OK AeroTech G53 2.44lb 51ft/s 191ft/s 7.0G 574ft 6.1s 4s
OK Cesaroni G80 2.43lb 51ft/s 229ft/s 8.1G 597ft 6.0s 5s
OK AeroTech G77 2.39lb 51ft/s 246ft/s 8.0G 664ft 6.3s 5s
OK AeroTech G79 2.47lb 53ft/s 245ft/s 7.9G 689ft 6.4s 5s
OK Cesaroni G83 2.44lb 54ft/s 249ft/s 8.2G 693ft 6.4s 5s
OK Cesaroni G57 2.44lb 50ft/s 222ft/s 7.1G 705ft 6.7s 5s
OK Cesaroni G250 2.43lb 89ft/s 304ft/s 25.3G 714ft 6.1s 6s
OK AeroTech G76 2.44lb 66ft/s 243ft/s 12.9G 758ft 6.5s 5s
OK Cesaroni G126 2.44lb 66ft/s 290ft/s 13.6G 759ft 6.4s 5s
OK AeroTech G64 2.45lb 58ft/s 238ft/s 8.9G 781ft 6.8s 4s
OK AeroTech G75 2.41lb 54ft/s 261ft/s 8.4G 796ft 6.8s 5s
OK Cesaroni G131 2.56lb 65ft/s 302ft/s 12.0G 802ft 6.6s 5s
OK AeroTech G78 2.39lb 53ft/s 277ft/s 8.4G 811ft 6.8s 5s
OK AeroTech G125 2.39lb 64ft/s 318ft/s 12.7G 829ft 6.6s 6s
OK AeroTech G80 2.40lb 56ft/s 286ft/s 8.7G 860ft 6.9s 5s
OK Cesaroni G106 2.53lb 56ft/s 318ft/s 10.7G 891ft 7.0s 6s
OK KBA G135 2.62lb 60ft/s 338ft/s 12.0G 916ft 7.0s 6s
OK AeroTech H165 2.56lb 73ft/s 379ft/s 15.5G 1,023ft 7.1s 6s
OK Cesaroni G125 2.55lb 66ft/s 360ft/s 13.3G 1,026ft 7.3s 6s
OK Cesaroni G118 2.53lb 63ft/s 357ft/s 12.9G 1,030ft 7.3s 6s
OK Cesaroni H175 2.66lb 74ft/s 392ft/s 16.9G 1,039ft 7.2s 6s
OK Cesaroni H410 2.52lb 118ft/s 449ft/s 44.7G 1,040ft 6.9s 6s
OK Cesaroni H133 2.54lb 67ft/s 368ft/s 16.0G 1,051ft 7.3s 6s
OK Cesaroni H163 2.53lb 72ft/s 396ft/s 18.3G 1,066ft 7.2s 6s
OK Cesaroni G54 2.54lb 59ft/s 265ft/s 9.7G 1,073ft 7.9s 5s
OK AeroTech G138 2.45lb 64ft/s 409ft/s 14.1G 1,078ft 7.3s 6s
OK Cesaroni H90 2.48lb 63ft/s 341ft/s 13.1G 1,086ft 7.6s 6s
OK AeroTech H128 2.57lb 71ft/s 386ft/s 14.7G 1,090ft 7.4s 6s
OK AeroTech H238 2.55lb 85ft/s 413ft/s 19.4G 1,091ft 7.2s 6s
OK Cesaroni H87 2.57lb 56ft/s 336ft/s 10.2G 1,097ft 7.7s 6s
OK RATT H70 2.90lb 59ft/s 300ft/s 9.6G 1,107ft 7.9s 5s
OK Cesaroni H123 2.62lb 62ft/s 382ft/s 11.0G 1,115ft 7.6s 6s
OK Cesaroni H54 2.58lb 51ft/s 271ft/s 7.8G 1,124ft 8.2s 5s
OK AeroTech H115 2.57lb 60ft/s 376ft/s 9.7G 1,139ft 7.6s 6s
OK AeroTech H97 2.73lb 54ft/s 360ft/s 7.9G 1,181ft 8.0s 6s
OK Cesaroni H118 2.63lb 67ft/s 381ft/s 13.5G 1,181ft 7.7s 6s
OK Cesaroni H237 2.77lb 83ft/s 475ft/s 20.8G 1,230ft 7.5s 7s
OK AeroTech H220 2.67lb 88ft/s 471ft/s 24.8G 1,243ft 7.5s 7s
OK AeroTech H210 2.66lb 85ft/s 475ft/s 20.0G 1,264ft 7.6s 7s
OK Cesaroni H151 2.64lb 73ft/s 434ft/s 16.3G 1,275ft 7.7s 6s
OK Cesaroni H170 2.63lb 82ft/s 465ft/s 19.3G 1,318ft 7.7s 6s
OK AeroTech H182 2.58lb 75ft/s 487ft/s 15.1G 1,319ft 7.8s 7s
OK Cesaroni H160 2.72lb 73ft/s 463ft/s 14.3G 1,327ft 7.9s 6s
OK Cesaroni H135 2.67lb 66ft/s 434ft/s 12.9G 1,336ft 8.0s 6s
OK KBA H130 3.68lb 62ft/s 369ft/s 12.4G 1,341ft 8.5s 7s
OK AeroTech H180 2.67lb 82ft/s 486ft/s 20.1G 1,352ft 7.8s 6s
OK AeroTech H250 2.68lb 96ft/s 518ft/s 26.0G 1,355ft 7.7s 7s
OK KBA H225 2.82lb 74ft/s 525ft/s 19.3G 1,404ft 8.0s 7s
OK AeroTech H195 2.55lb 92ft/s 523ft/s 21.4G 1,404ft 7.8s 7s
OK Cesaroni H295 2.87lb 96ft/s 559ft/s 26.5G 1,413ft 7.8s 7s
OK AeroTech H135 2.59lb 65ft/s 433ft/s 12.3G 1,426ft 8.2s 6s
OK Cesaroni H194 2.75lb 81ft/s 518ft/s 22.1G 1,482ft 8.0s 7s
OK Cesaroni H180 2.81lb 82ft/s 508ft/s 20.6G 1,486ft 8.1s 7s
OK Cesaroni H200 2.72lb 85ft/s 525ft/s 23.0G 1,504ft 8.0s 7s
OK Cesaroni H399 2.77lb 123ft/s 643ft/s 43.4G 1,527ft 7.9s 7s
OK Cesaroni H340 2.98lb 111ft/s 612ft/s 32.6G 1,530ft 7.9s 7s
OK Cesaroni H255 2.63lb 99ft/s 586ft/s 31.2G 1,532ft 7.9s 7s
OK Cesaroni H140 2.73lb 82ft/s 483ft/s 19.2G 1,580ft 8.4s 6s
OK AeroTech H268 2.91lb 93ft/s 606ft/s 24.4G 1,656ft 8.3s 7s
OK Cesaroni H226 2.91lb 92ft/s 578ft/s 26.0G 1,657ft 8.3s 7s
OK Cesaroni H233 2.84lb 92ft/s 597ft/s 25.9G 1,684ft 8.3s 7s
OK Cesaroni H159 2.87lb 71ft/s 522ft/s 13.5G 1,688ft 8.7s 7s
OK Cesaroni H255 2.82lb 104ft/s 624ft/s 31.9G 1,695ft 8.2s 7s
OK Cesaroni H160 2.82lb 90ft/s 529ft/s 24.2G 1,751ft 8.6s 6s
OK AeroTech I200 2.91lb 88ft/s 571ft/s 22.5G 1,754ft 8.5s 7s
OK Cesaroni I204 2.89lb 92ft/s 599ft/s 26.8G 1,830ft 8.6s 7s
OK AeroTech I205 2.81lb 88ft/s 611ft/s 28.1G 1,834ft 8.5s 7s
OK Cesaroni I224 2.93lb 102ft/s 651ft/s 32.2G 1,938ft 8.7s 7s
OK Cesaroni I243 3.00lb 99ft/s 642ft/s 31.7G 1,941ft 8.7s 7s
OK KBA J520 3.71lb 117ft/s 975ft/s 42.2G 2,580ft 9.5s 8s
warningsW,D Estes G80 2.39lb 7:1 thrust/weight ratio (no data)

W Motor total weight unknown, lift-off Weight not accurate.

D No simulation data found for this motor.

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 Estes E16 speed at end of launch guide too slow (20ft/s)
failedG AeroTech E23 speed at end of launch guide too slow (31ft/s)
failedG AeroTech E16 speed at end of launch guide too slow (25ft/s)
failedG AeroTech F23 speed at end of launch guide too slow (33ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (33ft/s)
failedG AeroTech F27 speed at end of launch guide too slow (31ft/s)
failedG Estes F15 speed at end of launch guide too slow (17ft/s)
failedG AeroTech F37 speed at end of launch guide too slow (34ft/s)
failedG AeroTech F62 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (33ft/s)
failedG AeroTech F20 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni F32 speed at end of launch guide too slow (30ft/s)
failedG AeroTech F42 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni F29 speed at end of launch guide too slow (28ft/s)
failedG Cesaroni F31 speed at end of launch guide too slow (31ft/s)
failedG Cesaroni F59 speed at end of launch guide too slow (46ft/s)
failed5 Estes F26 average thrust fails 5:1 thrust/weight ratio (3:1)
failedG AeroTech F26 speed at end of launch guide too slow (30ft/s)
failedG AeroTech F22 speed at end of launch guide too slow (26ft/s)
failedG Apogee F10 speed at end of launch guide too slow (21ft/s)
failedG AeroTech F50 speed at end of launch guide too slow (47ft/s)
failedG AeroTech F25 speed at end of launch guide too slow (40ft/s)
failedG AeroTech F40 speed at end of launch guide too slow (44ft/s)
failedG AeroTech G38 speed at end of launch guide too slow (37ft/s)
failedG Estes G40 speed at end of launch guide too slow (45ft/s)
failedG AeroTech G77 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni G68 speed at end of launch guide too slow (46ft/s)
failedG AeroTech G79 speed at end of launch guide too slow (46ft/s)
failedG AeroTech G40 speed at end of launch guide too slow (45ft/s)
failedG AeroTech G25 speed at end of launch guide too slow (32ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (44ft/s)
failedG KBA G82 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni G33 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni H42 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni H53 speed at end of launch guide too slow (45ft/s)
failedG RATT I80 speed at end of launch guide too slow (47ft/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.)

5 The 5:1 thrust-to-weight ratio check is a useful rule of thumb, but it does break down for motors with unusual thrust curves. For example, motors with a high initial thrust and a long tail-off may fail this test but still be safe for use.

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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