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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 179 motors that fit and appear to have enough thrust (627 motors didn't fit, 5 motors failed safety checks). 181 motor had thrust curves available and 329 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:   4-inch Jart
Owner: Erik Czerwin
Body Diameter: 3.98in
Dry Weight: 5.45lb
MMT Diameter: 54.0mm
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 AeroTech I215 6.61lb 63ft/s 369ft/s 7.9G 1,808ft 10.8s 9s
OK AeroTech I170 6.61lb 53ft/s 358ft/s 6.1G 1,837ft 11.1s 9s
OK AeroTech I599 6.58lb 114ft/s 430ft/s 25.3G 1,932ft 10.4s 10s
OK AeroTech I229 6.58lb 62ft/s 392ft/s 8.4G 1,936ft 11.0s 9s
OK Cesaroni I150 6.71lb 48ft/s 377ft/s 4.9G 2,178ft 12.3s 9s
OK Cesaroni I445 6.72lb 84ft/s 476ft/s 16.9G 2,330ft 11.5s 10s
OK Cesaroni I218 6.73lb 61ft/s 439ft/s 7.9G 2,390ft 12.2s 10s
OK Cesaroni I165 6.76lb 51ft/s 417ft/s 5.3G 2,499ft 12.9s 9s
OK Contrail J245 8.87lb 65ft/s 430ft/s 10.1G 2,603ft 12.8s 10s
OK Contrail J355 8.90lb 77ft/s 489ft/s 13.1G 2,818ft 13.0s 11s
OK Hypertek J115 8.28lb 51ft/s 366ft/s 5.4G 2,825ft 14.4s 8s
OK Cesaroni I100 7.23lb 56ft/s 354ft/s 8.5G 2,998ft 14.7s 6s
OK Hypertek J250 8.30lb 70ft/s 476ft/s 10.1G 3,045ft 13.5s 10s
OK Contrail J292 8.85lb 79ft/s 481ft/s 13.0G 3,104ft 13.7s 11s
OK Hypertek J170 8.28lb 65ft/s 442ft/s 8.5G 3,182ft 14.3s 10s
OK AeroTech I65 7.11lb 49ft/s 369ft/s 5.2G 3,220ft 15.5s 7s
OK Hypertek J120 8.30lb 54ft/s 408ft/s 6.1G 3,293ft 15.3s 8s
OK Cesaroni J250 7.28lb 56ft/s 564ft/s 7.6G 3,353ft 14.1s 11s
OK AeroTech J250 7.45lb 57ft/s 572ft/s 8.3G 3,457ft 14.2s 11s
OK Cesaroni J145 7.30lb 59ft/s 458ft/s 13.9G 3,464ft 14.8s 10s
OK Cesaroni J280 7.55lb 61ft/s 594ft/s 8.7G 3,484ft 14.2s 12s
OK AeroTech J250 7.01lb 70ft/s 574ft/s 9.8G 3,593ft 14.2s 11s
OK Hypertek J270 8.31lb 79ft/s 538ft/s 12.4G 3,606ft 14.4s 11s
OK Cesaroni J1055 7.15lb 128ft/s 736ft/s 35.2G 3,683ft 13.4s 13s
OK AeroTech J315 7.33lb 68ft/s 622ft/s 10.7G 3,749ft 14.4s 12s
OK Hypertek J190 8.30lb 68ft/s 507ft/s 9.3G 3,772ft 15.2s 10s
OK AeroTech J180 7.23lb 67ft/s 554ft/s 9.2G 4,007ft 15.2s 10s
OK Cesaroni J240 7.38lb 61ft/s 626ft/s 8.0G 4,034ft 15.2s 12s
OK Gorilla J365 8.10lb 59ft/s 677ft/s 13.1G 4,045ft 15.0s 13s
OK Cesaroni J430 7.21lb 83ft/s 725ft/s 15.3G 4,106ft 14.6s 13s
OK AeroTech J275 7.36lb 63ft/s 629ft/s 9.3G 4,153ft 15.2s 11s
OK Cesaroni J293 7.30lb 65ft/s 674ft/s 9.9G 4,169ft 15.1s 12s
OK AeroTech J1299 7.29lb 147ft/s 834ft/s 45.1G 4,170ft 14.0s 13s
OK AeroTech J460 7.19lb 89ft/s 738ft/s 16.4G 4,204ft 14.6s 12s
OK Cesaroni J210 7.31lb 61ft/s 582ft/s 9.1G 4,219ft 15.9s 12s
OK Cesaroni J244 7.46lb 58ft/s 649ft/s 7.0G 4,234ft 15.6s 12s
OK AMW J1365 7.92lb 143ft/s 848ft/s 44.1G 4,398ft 14.4s 14s
OK AMW J400 8.50lb 68ft/s 735ft/s 11.9G 4,497ft 15.5s 13s
OK Loki J350 8.23lb 66ft/s 736ft/s 11.5G 4,556ft 15.6s 13s
OK Gorilla J167 8.13lb 64ft/s 542ft/s 9.3G 4,592ft 16.7s 11s
OK AMW J475 8.56lb 76ft/s 790ft/s 15.6G 4,723ft 15.5s 13s
OK Cesaroni J360 7.88lb 65ft/s 783ft/s 14.4G 4,851ft 15.9s 13s
OK Cesaroni J380 8.30lb 68ft/s 800ft/s 10.9G 4,889ft 16.0s 13s
OK Gorilla J465 8.06lb 75ft/s 825ft/s 17.6G 4,899ft 15.7s 13s
OK AeroTech J1799 7.90lb 166ft/s 997ft/s 60.7G 4,923ft 14.8s 14s
OK Gorilla J395 8.01lb 70ft/s 801ft/s 12.1G 4,928ft 16.0s 13s
OK Cesaroni J1520 7.71lb 152ft/s 1,011ft/s 49.6G 4,991ft 14.9s 14s
OK AeroTech J450 8.15lb 75ft/s 822ft/s 14.0G 4,992ft 15.9s 14s
OK AMW J395 8.25lb 73ft/s 794ft/s 11.9G 5,066ft 16.2s 13s
OK Gorilla J485 8.07lb 76ft/s 856ft/s 15.3G 5,068ft 15.9s 14s
OK Gorilla J450 8.66lb 69ft/s 821ft/s 15.0G 5,100ft 16.2s 14s
OK Gorilla J535 8.15lb 94ft/s 882ft/s 17.7G 5,145ft 15.7s 14s
OK AeroTech J135 7.97lb 51ft/s 596ft/s 6.2G 5,149ft 17.6s 10s
OK AMW J325 8.16lb 78ft/s 742ft/s 13.9G 5,156ft 16.4s 13s
OK AMW J440 8.16lb 105ft/s 843ft/s 21.2G 5,158ft 15.7s 14s
OK Loki J525 8.18lb 86ft/s 895ft/s 17.2G 5,188ft 15.8s 14s
OK Loki J820 8.12lb 121ft/s 939ft/s 27.8G 5,198ft 15.4s 14s
OK AMW K1720 8.43lb 151ft/s 1,026ft/s 53.0G 5,292ft 15.4s 15s
OK AeroTech J540 7.84lb 94ft/s 918ft/s 18.5G 5,329ft 15.8s 14s
OK AeroTech J401 7.46lb 79ft/s 880ft/s 13.5G 5,355ft 16.1s 13s
OK AMW J745 8.14lb 107ft/s 975ft/s 23.3G 5,492ft 16.0s 14s
OK AMW J475 8.74lb 82ft/s 861ft/s 14.1G 5,532ft 16.6s 13s
OK Loki J175 8.21lb 68ft/s 647ft/s 10.5G 5,563ft 17.7s 11s
OK Cesaroni J355 8.04lb 74ft/s 844ft/s 11.2G 5,574ft 16.8s 13s
OK Loki J300 8.35lb 68ft/s 783ft/s 9.9G 5,675ft 17.3s 13s
OK Cesaroni J295 7.92lb 73ft/s 793ft/s 11.5G 5,708ft 17.1s 13s
OK AeroTech J800 7.84lb 110ft/s 1,026ft/s 26.2G 5,721ft 16.0s 14s
OK Cesaroni J760 7.82lb 104ft/s 1,063ft/s 24.9G 5,791ft 16.1s 14s
OK AMW K665 9.28lb 85ft/s 975ft/s 19.7G 5,802ft 16.5s 15s
OK AeroTech J415 8.03lb 78ft/s 909ft/s 14.2G 5,828ft 16.7s 13s
OK AeroTech K456 8.72lb 76ft/s 922ft/s 12.4G 5,834ft 16.9s 14s
OK Cesaroni J449 7.92lb 81ft/s 957ft/s 14.9G 5,860ft 16.7s 14s
OK Cesaroni J140 8.27lb 48ft/s 592ft/s 4.9G 5,892ft 19.4s 10s
OK Cesaroni K360 8.17lb 70ft/s 905ft/s 10.0G 5,963ft 17.2s 14s
OK Gorilla K222 8.97lb 69ft/s 667ft/s 9.7G 5,976ft 18.4s 12s
OK AeroTech K2050 8.30lb 171ft/s 1,224ft/s 59.2G 6,005ft 15.9s 15s
OK Cesaroni K2045 8.29lb 165ft/s 1,260ft/s 61.6G 6,045ft 15.8s 15s
OK AeroTech K400 8.08lb 85ft/s 911ft/s 14.0G 6,094ft 17.2s 14s
OK Gorilla K555 8.93lb 79ft/s 998ft/s 15.7G 6,114ft 17.1s 15s
OK Gorilla K520 8.63lb 77ft/s 989ft/s 14.7G 6,121ft 17.1s 15s
OK Cesaroni K454 8.52lb 75ft/s 956ft/s 13.5G 6,124ft 17.1s 14s
OK Cesaroni K530 9.07lb 80ft/s 1,011ft/s 13.8G 6,147ft 17.1s 14s
OK Gorilla K630 8.89lb 88ft/s 1,025ft/s 19.7G 6,155ft 16.9s 15s
OK Gorilla K533 9.23lb 75ft/s 977ft/s 16.5G 6,172ft 17.2s 15s
OK AMW K475 8.74lb 78ft/s 973ft/s 13.5G 6,190ft 17.3s 14s
OK KBA K700 8.76lb 96ft/s 1,088ft/s 22.5G 6,234ft 16.8s 15s
OK AMW K535 8.89lb 87ft/s 992ft/s 15.2G 6,310ft 17.3s 15s
OK AeroTech K513 9.08lb 81ft/s 1,020ft/s 15.4G 6,310ft 17.1s 14s
OK AeroTech K535 8.24lb 93ft/s 1,019ft/s 16.5G 6,351ft 17.0s 14s
OK AeroTech K695 8.73lb 94ft/s 1,095ft/s 22.9G 6,353ft 16.8s 15s
OK AeroTech K185 8.61lb 58ft/s 716ft/s 7.8G 6,416ft 18.8s 11s
OK AMW K610 9.34lb 85ft/s 1,025ft/s 17.0G 6,501ft 17.4s 15s
OK AMW K455 8.77lb 96ft/s 952ft/s 18.9G 6,529ft 17.5s 14s
OK AMW K935 8.77lb 114ft/s 1,183ft/s 27.1G 6,643ft 16.9s 15s
OK AeroTech K1100 8.40lb 129ft/s 1,236ft/s 35.0G 6,647ft 16.6s 15s
OK AMW K700 10.05lb 89ft/s 1,093ft/s 18.5G 6,704ft 17.5s 15s
OK Loki K690 10.74lb 84ft/s 1,088ft/s 17.2G 6,714ft 17.7s 15s
OK AeroTech K540 8.26lb 100ft/s 1,099ft/s 22.3G 6,801ft 17.1s 14s
OK AeroTech K550 8.73lb 91ft/s 1,054ft/s 19.9G 6,842ft 17.4s 14s
OK Cesaroni K940 8.46lb 115ft/s 1,267ft/s 28.4G 6,852ft 16.9s 15s
OK AMW K855 10.13lb 101ft/s 1,161ft/s 22.7G 6,870ft 17.5s 15s
OK Cesaroni K500 8.70lb 82ft/s 1,068ft/s 14.7G 6,873ft 17.7s 15s
OK Cesaroni K515 9.10lb 83ft/s 1,068ft/s 15.8G 7,001ft 17.9s 15s
OK Cesaroni K400 8.87lb 76ft/s 996ft/s 11.1G 7,005ft 18.3s 14s
OK Gorilla K700 9.23lb 89ft/s 1,166ft/s 18.8G 7,043ft 17.8s 15s
OK Gorilla K327 9.46lb 80ft/s 847ft/s 15.4G 7,048ft 18.6s 13s
OK Cesaroni K630 8.56lb 97ft/s 1,188ft/s 19.8G 7,049ft 17.4s 15s
OK Cesaroni K650 9.84lb 83ft/s 1,173ft/s 16.0G 7,070ft 17.8s 15s
OK Gorilla K763 9.40lb 93ft/s 1,201ft/s 20.5G 7,082ft 17.7s 15s
OK Cesaroni K445 8.53lb 89ft/s 1,034ft/s 16.6G 7,129ft 18.0s 14s
OK Gorilla K805 9.36lb 95ft/s 1,214ft/s 26.0G 7,167ft 17.6s 15s
OK AeroTech K805 8.85lb 100ft/s 1,236ft/s 21.9G 7,196ft 17.5s 15s
OK Cesaroni K520 8.92lb 87ft/s 1,115ft/s 14.5G 7,246ft 18.0s 15s
OK AeroTech K1103 8.67lb 139ft/s 1,360ft/s 40.8G 7,256ft 17.1s 15s
OK Cesaroni K160 8.70lb 54ft/s 672ft/s 6.0G 7,262ft 20.7s 11s
OK AeroTech K850 9.95lb 102ft/s 1,272ft/s 24.2G 7,282ft 17.7s 16s
OK AeroTech K990 10.10lb 99ft/s 1,257ft/s 23.5G 7,290ft 17.7s 16s
OK AMW K710 9.44lb 99ft/s 1,143ft/s 20.1G 7,299ft 17.9s 15s
OK AMW K670 9.61lb 99ft/s 1,164ft/s 18.6G 7,349ft 18.0s 15s
OK Loki K250 9.40lb 81ft/s 806ft/s 18.2G 7,548ft 20.0s 13s
OK AMW K1250 9.45lb 134ft/s 1,372ft/s 37.4G 7,571ft 17.6s 16s
OK AMW K580 9.47lb 99ft/s 1,116ft/s 24.6G 7,573ft 18.3s 15s
OK Cesaroni K740 8.69lb 103ft/s 1,291ft/s 21.9G 7,575ft 17.7s 15s
OK Loki K960 9.30lb 131ft/s 1,335ft/s 36.3G 7,630ft 17.7s 16s
OK Cesaroni K1200 9.05lb 124ft/s 1,472ft/s 33.2G 7,746ft 17.5s 16s
OK Cesaroni K650 9.22lb 102ft/s 1,257ft/s 29.0G 7,860ft 18.1s 15s
OK Cesaroni K635 9.35lb 89ft/s 1,245ft/s 17.8G 7,864ft 18.3s 15s
OK Cesaroni K675 9.73lb 90ft/s 1,231ft/s 19.9G 7,870ft 18.4s 15s
OK AeroTech K1275 9.83lb 129ft/s 1,422ft/s 35.2G 7,870ft 17.7s 16s
OK AeroTech K828 10.35lb 108ft/s 1,317ft/s 27.5G 7,890ft 18.1s 16s
OK Gorilla K980 10.87lb 104ft/s 1,289ft/s 26.9G 7,947ft 18.5s 16s
OK Loki K527 9.80lb 87ft/s 1,148ft/s 16.5G 8,033ft 19.0s 15s
OK Cesaroni K490 9.54lb 82ft/s 1,149ft/s 12.9G 8,095ft 19.0s 15s
OK Cesaroni K780 9.20lb 107ft/s 1,388ft/s 23.4G 8,099ft 18.0s 15s
OK Cesaroni K570 9.16lb 103ft/s 1,217ft/s 21.1G 8,249ft 18.6s 15s
OK Cesaroni K600 9.62lb 90ft/s 1,251ft/s 17.2G 8,299ft 18.8s 15s
OK AMW K1075 11.27lb 110ft/s 1,345ft/s 25.3G 8,305ft 18.9s 17s
OK Cesaroni K1440 9.62lb 140ft/s 1,614ft/s 43.5G 8,446ft 17.9s 16s
OK AeroTech K700 9.94lb 107ft/s 1,292ft/s 23.3G 8,472ft 18.6s 15s
OK Cesaroni K815 10.29lb 92ft/s 1,393ft/s 25.3G 8,496ft 18.7s 16s
OK KBA K1750 11.10lb 133ft/s 1,604ft/s 45.3G 8,551ft 18.4s 17s
OK Cesaroni K750 9.98lb 96ft/s 1,360ft/s 20.9G 8,551ft 18.6s 15s
OK Cesaroni K261 9.71lb 59ft/s 905ft/s 7.4G 8,679ft 21.1s 12s
OK Gorilla K1075 11.05lb 108ft/s 1,435ft/s 24.9G 8,689ft 19.0s 17s
OK Loki K830 10.74lb 85ft/s 1,479ft/s 20.6G 8,740ft 19.1s 16s
OK AeroTech K270 10.08lb 64ft/s 875ft/s 8.5G 8,744ft 21.3s 13s
OK AeroTech K480 10.03lb 93ft/s 1,213ft/s 19.5G 8,754ft 19.2s 14s
OK Cesaroni K711 10.30lb 101ft/s 1,322ft/s 32.1G 8,756ft 19.0s 16s
OK Cesaroni K820 9.82lb 107ft/s 1,410ft/s 36.9G 8,770ft 18.7s 16s
OK AMW K1130 11.12lb 119ft/s 1,453ft/s 29.3G 8,894ft 19.0s 17s
OK Gorilla K1185 11.05lb 105ft/s 1,516ft/s 28.2G 8,894ft 19.0s 17s
OK AeroTech K375 10.09lb 118ft/s 1,055ft/s 29.0G 8,914ft 19.8s 14s
OK AeroTech K1050 10.31lb 120ft/s 1,530ft/s 31.2G 8,946ft 18.7s 16s
OK KBA K750 11.26lb 100ft/s 1,326ft/s 22.7G 9,028ft 19.4s 16s
OK AeroTech K455 10.49lb 117ft/s 1,097ft/s 27.1G 9,037ft 19.9s 15s
OK Cesaroni K660 9.75lb 106ft/s 1,344ft/s 24.0G 9,067ft 19.1s 15s
OK KBA L2300 11.25lb 155ft/s 1,749ft/s 60.6G 9,141ft 18.7s 18s
OK Cesaroni K590 9.85lb 132ft/s 1,217ft/s 40.5G 9,225ft 19.4s 15s
OK Gorilla K470 10.58lb 101ft/s 1,127ft/s 21.6G 9,254ft 19.9s 15s
OK AeroTech L1000 10.29lb 122ft/s 1,561ft/s 28.0G 9,285ft 18.8s 16s
OK AMW L1276 11.98lb 115ft/s 1,521ft/s 27.4G 9,289ft 19.5s 17s
OK AeroTech L1090 10.81lb 115ft/s 1,505ft/s 26.5G 9,337ft 19.2s 16s
OK AMW L985 11.12lb 114ft/s 1,468ft/s 28.7G 9,415ft 19.5s 17s
OK Cesaroni L1030 10.60lb 106ft/s 1,607ft/s 31.7G 9,452ft 19.0s 16s
OK Cesaroni L990 10.38lb 115ft/s 1,567ft/s 34.3G 9,497ft 19.0s 16s
OK Loki L1400 11.05lb 130ft/s 1,679ft/s 36.0G 9,504ft 19.1s 17s
OK Cesaroni K260 9.96lb 67ft/s 948ft/s 8.7G 9,561ft 21.7s 13s
OK Cesaroni L805 10.97lb 104ft/s 1,462ft/s 29.3G 9,759ft 19.6s 16s
OK Cesaroni L730 10.40lb 108ft/s 1,424ft/s 25.3G 9,770ft 19.6s 16s
OK Loki K350 11.05lb 97ft/s 1,017ft/s 23.9G 9,897ft 21.5s 15s
OK Cesaroni L640 10.40lb 125ft/s 1,297ft/s 31.9G 10,089ft 20.0s 15s
OK Cesaroni K300 10.45lb 74ft/s 1,027ft/s 10.7G 10,199ft 22.0s 14s
OK Cesaroni L935 11.05lb 113ft/s 1,584ft/s 30.4G 10,208ft 19.7s 16s
OK AeroTech K250 10.33lb 60ft/s 998ft/s 8.6G 10,363ft 22.6s 12s
OK Cesaroni L265 10.92lb 64ft/s 973ft/s 8.6G 10,690ft 23.4s 13s
OK Loki L1040 11.98lb 108ft/s 1,762ft/s 24.0G 11,572ft 20.8s 17s
warningsD AMW K590 9.24lb 14:1 thrust/weight ratio (no data)
warningsD Gorilla K695 8.75lb 18:1 thrust/weight ratio (no data)
warningsD Gorilla K828 9.50lb 20:1 thrust/weight ratio (no data)

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 AeroTech I117 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni I140 speed at end of launch guide too slow (45ft/s)
failedG AeroTech I115 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni I120 speed at end of launch guide too slow (44ft/s)
failedG AeroTech J90 speed at end of launch guide too slow (43ft/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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