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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 188 motors that fit and appear to have enough thrust (623 motors didn't fit). 185 motor had thrust curves available and 337 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:   RCDP Thunderball II
Owner: Thomas Kernes
Body Diameter: 2.50in
Dry Weight: 4.00lb
MMT Diameter: 54.0mm
MMT Length: 38.00in
CD: 0.30
Web Site:

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 I117 5.25lb 51ft/s 427ft/s 6.2G 2,924ft 14.4s 12s
OK Cesaroni I140 5.24lb 57ft/s 460ft/s 6.0G 3,342ft 15.2s 12s
OK AeroTech I115 5.20lb 52ft/s 460ft/s 6.4G 3,499ft 15.7s 12s
OK AeroTech I215 5.16lb 80ft/s 508ft/s 10.5G 3,555ft 15.1s 13s
OK AeroTech I170 5.16lb 66ft/s 502ft/s 8.2G 3,631ft 15.5s 13s
OK AeroTech I599 5.13lb 142ft/s 568ft/s 33.0G 3,828ft 14.9s 14s
OK AeroTech I229 5.13lb 79ft/s 538ft/s 11.3G 3,837ft 15.5s 14s
OK Cesaroni I150 5.26lb 62ft/s 541ft/s 6.5G 4,337ft 17.0s 14s
OK Cesaroni I120 5.37lb 56ft/s 539ft/s 5.1G 4,669ft 18.1s 14s
OK Contrail J245 7.42lb 81ft/s 559ft/s 12.3G 4,679ft 17.3s 15s
OK Cesaroni I445 5.27lb 109ft/s 636ft/s 22.4G 4,685ft 16.5s 15s
OK Cesaroni I218 5.28lb 78ft/s 610ft/s 10.4G 4,798ft 17.3s 15s
OK Cesaroni I165 5.31lb 65ft/s 597ft/s 7.1G 5,015ft 18.0s 15s
OK Contrail J355 7.45lb 94ft/s 623ft/s 15.9G 5,164ft 17.9s 16s
OK Hypertek J115 6.83lb 64ft/s 508ft/s 6.8G 5,225ft 19.3s 13s
OK Contrail J292 7.40lb 96ft/s 620ft/s 15.8G 5,597ft 18.7s 16s
OK Hypertek J250 6.85lb 87ft/s 634ft/s 12.4G 5,759ft 18.9s 16s
OK Cesaroni I100 5.78lb 73ft/s 526ft/s 10.9G 5,863ft 20.1s 11s
OK Hypertek J170 6.83lb 81ft/s 605ft/s 10.5G 6,006ft 19.7s 15s
OK Hypertek J120 6.85lb 68ft/s 571ft/s 7.6G 6,202ft 20.7s 14s
OK AeroTech I65 5.66lb 65ft/s 565ft/s 6.8G 6,428ft 21.2s 13s
OK AeroTech J90 5.88lb 55ft/s 618ft/s 6.1G 6,767ft 21.4s 14s
OK Cesaroni J250 5.83lb 69ft/s 781ft/s 10.4G 6,874ft 20.3s 17s
OK Cesaroni J145 5.85lb 76ft/s 675ft/s 17.7G 6,972ft 20.9s 16s
OK Hypertek J270 6.86lb 97ft/s 724ft/s 15.2G 7,010ft 20.4s 17s
OK AeroTech J250 6.00lb 73ft/s 796ft/s 11.1G 7,089ft 20.5s 18s
OK Cesaroni J280 6.10lb 75ft/s 816ft/s 11.8G 7,155ft 20.5s 18s
OK Hypertek J190 6.85lb 84ft/s 699ft/s 11.5G 7,316ft 21.3s 16s
OK Contrail J358 7.84lb 98ft/s 766ft/s 19.9G 7,481ft 21.2s 19s
OK AeroTech J250 5.56lb 87ft/s 822ft/s 12.8G 7,500ft 20.7s 18s
OK AeroTech J315 5.88lb 88ft/s 866ft/s 13.9G 7,813ft 21.1s 18s
OK Cesaroni J1055 5.70lb 162ft/s 964ft/s 46.8G 7,862ft 20.3s 20s
OK AeroTech J180 5.78lb 86ft/s 806ft/s 11.8G 8,286ft 21.9s 17s
OK Gorilla J365 6.65lb 72ft/s 903ft/s 16.9G 8,304ft 21.8s 19s
OK Cesaroni J240 5.93lb 75ft/s 890ft/s 10.5G 8,424ft 22.1s 19s
OK Cesaroni J210 5.86lb 79ft/s 839ft/s 11.6G 8,664ft 22.8s 19s
OK AeroTech J275 5.91lb 79ft/s 900ft/s 12.4G 8,699ft 22.2s 18s
OK Cesaroni J430 5.76lb 106ft/s 992ft/s 19.4G 8,766ft 21.7s 20s
OK Cesaroni J293 5.85lb 83ft/s 948ft/s 12.7G 8,813ft 22.2s 19s
OK Cesaroni J244 6.01lb 71ft/s 927ft/s 9.4G 8,883ft 22.7s 19s
OK Contrail J272 7.85lb 95ft/s 809ft/s 15.4G 8,981ft 23.3s 19s
OK AeroTech J460 5.74lb 112ft/s 1,015ft/s 21.2G 9,019ft 21.8s 20s
OK AeroTech J1299 5.84lb 185ft/s 1,087ft/s 58.4G 9,056ft 21.4s 21s
OK Gorilla J167 6.68lb 80ft/s 797ft/s 11.6G 9,229ft 23.7s 18s
OK AMW J400 7.05lb 84ft/s 989ft/s 15.9G 9,324ft 22.8s 20s
OK AMW J1365 6.47lb 176ft/s 1,084ft/s 55.9G 9,395ft 21.9s 21s
OK Contrail J642 7.95lb 141ft/s 952ft/s 40.3G 9,417ft 22.7s 21s
OK Loki J350 6.78lb 82ft/s 994ft/s 14.8G 9,485ft 23.0s 20s
OK AMW J475 7.11lb 93ft/s 1,053ft/s 20.2G 9,899ft 23.1s 21s
OK Contrail J416 7.75lb 113ft/s 925ft/s 21.8G 9,933ft 23.9s 21s
OK Cesaroni J360 6.43lb 81ft/s 1,086ft/s 17.9G 10,327ft 23.6s 21s
OK Cesaroni J380 6.85lb 84ft/s 1,100ft/s 14.9G 10,379ft 23.7s 21s
OK Gorilla J465 6.61lb 94ft/s 1,116ft/s 23.2G 10,484ft 23.5s 21s
OK Gorilla J395 6.56lb 87ft/s 1,098ft/s 15.6G 10,495ft 23.8s 21s
OK AeroTech J135 6.52lb 64ft/s 883ft/s 8.2G 10,579ft 25.1s 18s
OK AeroTech J450 6.70lb 93ft/s 1,110ft/s 18.1G 10,616ft 23.8s 22s
OK AMW J395 6.80lb 95ft/s 1,089ft/s 14.9G 10,702ft 24.1s 21s
OK Gorilla J450 7.21lb 86ft/s 1,099ft/s 19.0G 10,740ft 24.2s 22s
OK AMW J325 6.71lb 101ft/s 1,048ft/s 17.1G 10,823ft 24.3s 21s
OK AeroTech J1799 6.45lb 205ft/s 1,282ft/s 75.4G 10,873ft 22.9s 22s
OK Gorilla J485 6.62lb 95ft/s 1,162ft/s 19.7G 10,907ft 23.9s 22s
OK AMW J440 6.71lb 130ft/s 1,142ft/s 26.0G 11,036ft 23.8s 22s
OK Gorilla J535 6.70lb 116ft/s 1,184ft/s 22.0G 11,073ft 23.8s 22s
OK Cesaroni J1520 6.26lb 189ft/s 1,313ft/s 65.6G 11,111ft 23.1s 22s
OK Loki J525 6.73lb 107ft/s 1,203ft/s 22.7G 11,203ft 24.0s 22s
OK Loki J820 6.67lb 149ft/s 1,247ft/s 37.1G 11,339ft 23.7s 22s
OK Loki J175 6.76lb 85ft/s 958ft/s 13.0G 11,480ft 25.6s 19s
OK AMW K1720 6.98lb 197ft/s 1,302ft/s 66.8G 11,604ft 23.8s 23s
OK AMW J475 7.29lb 100ft/s 1,155ft/s 17.1G 11,664ft 24.8s 22s
OK AeroTech J540 6.39lb 118ft/s 1,275ft/s 23.5G 11,671ft 24.1s 22s
OK AeroTech J401 6.01lb 100ft/s 1,248ft/s 17.4G 11,747ft 24.4s 22s
OK Loki J300 6.90lb 85ft/s 1,119ft/s 12.2G 11,977ft 25.6s 21s
OK Cesaroni J355 6.59lb 92ft/s 1,207ft/s 14.3G 12,014ft 25.1s 22s
OK Cesaroni J140 6.82lb 61ft/s 910ft/s 6.2G 12,031ft 27.3s 18s
OK AMW J745 6.69lb 131ft/s 1,298ft/s 29.2G 12,032ft 24.5s 23s
OK Gorilla K222 7.52lb 84ft/s 980ft/s 11.8G 12,167ft 26.5s 20s
OK Cesaroni J295 6.47lb 91ft/s 1,163ft/s 14.2G 12,226ft 25.4s 21s
OK AMW K665 7.83lb 108ft/s 1,293ft/s 25.4G 12,487ft 25.1s 23s
OK AeroTech K456 7.27lb 93ft/s 1,274ft/s 16.0G 12,549ft 25.4s 22s
OK AeroTech J415 6.58lb 97ft/s 1,287ft/s 18.5G 12,684ft 25.2s 22s
OK AeroTech J800 6.39lb 137ft/s 1,402ft/s 32.5G 12,716ft 24.7s 23s
OK Cesaroni J449 6.47lb 100ft/s 1,344ft/s 18.5G 12,872ft 25.3s 23s
OK Cesaroni J760 6.37lb 129ft/s 1,443ft/s 30.8G 12,950ft 24.8s 23s
OK Cesaroni K360 6.72lb 87ft/s 1,297ft/s 13.4G 12,955ft 25.9s 22s
OK AeroTech K400 6.63lb 105ft/s 1,286ft/s 17.3G 13,241ft 26.0s 23s
OK Gorilla K555 7.48lb 96ft/s 1,343ft/s 19.8G 13,271ft 26.0s 23s
OK Cesaroni K454 7.07lb 92ft/s 1,337ft/s 16.8G 13,303ft 25.9s 23s
OK Gorilla K533 7.78lb 96ft/s 1,323ft/s 20.4G 13,307ft 26.0s 23s
OK AeroTech K185 7.16lb 73ft/s 1,056ft/s 9.9G 13,315ft 27.2s 20s
OK Gorilla K520 7.18lb 99ft/s 1,354ft/s 19.3G 13,347ft 26.0s 23s
OK Cesaroni K530 7.62lb 96ft/s 1,389ft/s 19.2G 13,386ft 25.9s 23s
OK AMW K475 7.29lb 96ft/s 1,336ft/s 18.4G 13,424ft 26.2s 23s
OK Gorilla K630 7.44lb 107ft/s 1,373ft/s 25.1G 13,440ft 25.9s 24s
OK AeroTech K2050 6.85lb 209ft/s 1,577ft/s 75.1G 13,631ft 25.0s 24s
OK AMW K535 7.44lb 105ft/s 1,360ft/s 18.8G 13,697ft 26.3s 24s
OK AeroTech K513 7.63lb 103ft/s 1,399ft/s 20.3G 13,728ft 26.1s 23s
OK KBA K700 7.31lb 124ft/s 1,448ft/s 29.6G 13,772ft 25.9s 24s
OK Cesaroni K2045 6.84lb 202ft/s 1,622ft/s 81.8G 13,791ft 25.0s 24s
OK AeroTech K535 6.79lb 114ft/s 1,442ft/s 20.6G 14,007ft 26.0s 23s
OK AMW K610 7.89lb 108ft/s 1,379ft/s 20.3G 14,052ft 26.6s 24s
OK AeroTech K695 7.28lb 116ft/s 1,496ft/s 28.1G 14,065ft 25.9s 24s
OK AMW K455 7.32lb 116ft/s 1,339ft/s 22.8G 14,133ft 26.6s 23s
OK Loki K690 9.29lb 98ft/s 1,426ft/s 21.6G 14,425ft 26.9s 25s
OK AMW K700 8.60lb 105ft/s 1,456ft/s 24.1G 14,559ft 26.8s 24s
OK Gorilla K327 8.01lb 96ft/s 1,227ft/s 18.6G 14,782ft 27.7s 22s
OK AMW K935 7.32lb 138ft/s 1,575ft/s 33.7G 14,876ft 26.4s 25s
OK Cesaroni K160 7.25lb 67ft/s 1,039ft/s 7.6G 14,996ft 29.5s 20s
OK AeroTech K550 7.28lb 112ft/s 1,487ft/s 25.1G 15,033ft 26.7s 23s
OK AeroTech K1100 6.95lb 163ft/s 1,672ft/s 42.5G 15,053ft 26.1s 24s
OK AMW K855 8.68lb 119ft/s 1,528ft/s 29.2G 15,062ft 27.0s 25s
OK AeroTech K540 6.81lb 123ft/s 1,579ft/s 27.3G 15,084ft 26.3s 23s
OK Cesaroni K500 7.25lb 100ft/s 1,527ft/s 18.4G 15,165ft 27.1s 24s
OK Cesaroni K400 7.42lb 93ft/s 1,450ft/s 13.5G 15,232ft 27.6s 24s
OK Cesaroni K515 7.65lb 100ft/s 1,504ft/s 18.9G 15,329ft 27.3s 24s
OK Cesaroni K940 7.01lb 140ft/s 1,720ft/s 34.8G 15,569ft 26.5s 25s
OK Cesaroni K650 8.39lb 104ft/s 1,605ft/s 22.0G 15,592ft 27.4s 25s
OK Gorilla K700 7.78lb 108ft/s 1,580ft/s 23.6G 15,645ft 27.5s 25s
OK Cesaroni K445 7.08lb 112ft/s 1,505ft/s 20.2G 15,665ft 27.4s 24s
OK Loki K250 7.95lb 97ft/s 1,217ft/s 21.7G 15,740ft 29.2s 22s
OK Gorilla K763 7.95lb 111ft/s 1,619ft/s 25.3G 15,765ft 27.4s 25s
OK Cesaroni K630 7.11lb 118ft/s 1,679ft/s 24.1G 15,785ft 26.9s 24s
OK Cesaroni K520 7.47lb 105ft/s 1,593ft/s 17.6G 16,019ft 27.6s 24s
OK Gorilla K805 7.91lb 114ft/s 1,639ft/s 32.6G 16,026ft 27.4s 25s
OK AMW K710 7.99lb 125ft/s 1,558ft/s 24.1G 16,075ft 27.7s 25s
OK AeroTech K990 8.65lb 125ft/s 1,659ft/s 30.3G 16,186ft 27.6s 25s
OK AeroTech K805 7.40lb 126ft/s 1,707ft/s 27.7G 16,205ft 27.3s 25s
OK AMW K670 8.16lb 118ft/s 1,584ft/s 22.4G 16,212ft 27.9s 25s
OK AeroTech K850 8.50lb 121ft/s 1,691ft/s 31.0G 16,243ft 27.5s 25s
OK AeroTech K1103 7.22lb 169ft/s 1,840ft/s 49.2G 16,614ft 27.0s 25s
OK AMW K580 8.02lb 126ft/s 1,553ft/s 29.3G 16,634ft 28.2s 25s
OK AMW K1250 8.00lb 159ft/s 1,802ft/s 44.4G 17,179ft 27.8s 26s
OK Cesaroni K740 7.24lb 125ft/s 1,816ft/s 27.2G 17,189ft 27.7s 25s
OK Loki K960 7.85lb 169ft/s 1,800ft/s 43.2G 17,293ft 27.8s 26s
OK Cesaroni K650 7.77lb 122ft/s 1,782ft/s 34.6G 17,480ft 28.0s 25s
OK Cesaroni K675 8.28lb 113ft/s 1,722ft/s 23.6G 17,496ft 28.5s 25s
OK Loki K527 8.35lb 109ft/s 1,604ft/s 19.5G 17,550ft 29.1s 25s
OK AeroTech K828 8.90lb 135ft/s 1,776ft/s 32.2G 17,574ft 28.3s 26s
OK Gorilla K980 9.42lb 129ft/s 1,681ft/s 32.8G 17,576ft 28.8s 27s
OK Cesaroni K635 7.90lb 114ft/s 1,776ft/s 21.9G 17,576ft 28.3s 25s
OK Cesaroni K490 8.09lb 98ft/s 1,686ft/s 16.6G 17,805ft 29.1s 25s
OK AeroTech K1275 8.38lb 162ft/s 1,909ft/s 41.7G 17,837ft 28.0s 26s
OK Cesaroni K1200 7.60lb 161ft/s 1,997ft/s 41.9G 17,863ft 27.8s 26s
OK Cesaroni K261 8.26lb 74ft/s 1,374ft/s 9.0G 18,201ft 30.9s 22s
OK AeroTech K270 8.63lb 80ft/s 1,303ft/s 10.1G 18,207ft 31.1s 22s
OK AMW K1075 9.82lb 127ft/s 1,731ft/s 32.0G 18,362ft 29.5s 27s
OK Cesaroni K780 7.75lb 128ft/s 1,967ft/s 28.0G 18,365ft 28.2s 25s
OK Cesaroni K570 7.71lb 123ft/s 1,766ft/s 25.2G 18,371ft 28.8s 25s
OK Cesaroni K600 8.17lb 113ft/s 1,801ft/s 20.5G 18,472ft 29.0s 26s
OK AeroTech K700 8.49lb 126ft/s 1,824ft/s 28.0G 18,808ft 28.9s 25s
OK AeroTech K375 8.64lb 139ft/s 1,571ft/s 34.6G 19,012ft 29.9s 24s
OK Cesaroni K815 8.84lb 115ft/s 1,918ft/s 29.6G 19,111ft 29.2s 26s
OK AeroTech K480 8.58lb 117ft/s 1,733ft/s 22.9G 19,125ft 29.6s 25s
OK Cesaroni K750 8.53lb 121ft/s 1,924ft/s 25.3G 19,177ft 29.1s 26s
OK AeroTech K455 9.04lb 137ft/s 1,613ft/s 32.0G 19,335ft 30.1s 25s
OK Cesaroni K711 8.85lb 119ft/s 1,889ft/s 37.5G 19,526ft 29.5s 26s
OK Gorilla K1075 9.60lb 126ft/s 1,893ft/s 32.3G 19,552ft 29.9s 28s
OK KBA K1750 9.65lb 154ft/s 2,046ft/s 58.8G 19,601ft 29.4s 28s
OK Cesaroni K1440 8.17lb 181ft/s 2,181ft/s 52.7G 19,612ft 28.6s 27s
OK Loki K830 9.29lb 102ft/s 1,998ft/s 32.8G 19,778ft 30.0s 27s
OK Cesaroni K820 8.37lb 136ft/s 1,977ft/s 43.5G 19,841ft 29.4s 26s
OK KBA K750 9.81lb 123ft/s 1,817ft/s 26.2G 19,908ft 30.3s 27s
OK Gorilla K470 9.13lb 118ft/s 1,645ft/s 25.5G 19,975ft 30.4s 25s
OK AMW K1130 9.67lb 138ft/s 1,923ft/s 34.3G 20,031ft 30.1s 28s
OK Cesaroni K260 8.51lb 80ft/s 1,449ft/s 10.6G 20,189ft 32.0s 23s
OK Gorilla K1185 9.60lb 122ft/s 1,994ft/s 35.1G 20,208ft 30.2s 28s
OK Cesaroni K590 8.40lb 155ft/s 1,807ft/s 47.7G 20,324ft 30.0s 26s
OK Cesaroni K660 8.30lb 134ft/s 1,950ft/s 28.4G 20,350ft 29.8s 26s
OK AeroTech K1050 8.86lb 151ft/s 2,081ft/s 36.5G 20,404ft 29.7s 27s
OK AMW L1276 10.53lb 132ft/s 1,961ft/s 35.7G 20,889ft 30.9s 29s
OK Loki K350 9.60lb 119ft/s 1,533ft/s 27.7G 20,913ft 32.2s 25s
OK AeroTech L1090 9.36lb 134ft/s 2,054ft/s 31.0G 21,085ft 30.3s 27s
OK AeroTech L1000 8.84lb 143ft/s 2,169ft/s 32.8G 21,093ft 29.7s 27s
OK KBA L2300 9.80lb 197ft/s 2,186ft/s 75.5G 21,182ft 30.2s 29s
OK AMW L985 9.67lb 142ft/s 1,978ft/s 33.2G 21,239ft 30.8s 28s
OK Cesaroni L1030 9.15lb 132ft/s 2,256ft/s 37.0G 21,630ft 30.1s 27s
OK Cesaroni K300 9.00lb 88ft/s 1,553ft/s 12.6G 21,634ft 32.7s 24s
OK Cesaroni L990 8.93lb 144ft/s 2,180ft/s 40.0G 21,663ft 30.2s 27s
OK AeroTech K250 8.88lb 72ft/s 1,539ft/s 10.4G 21,762ft 33.0s 23s
OK Cesaroni L805 9.52lb 129ft/s 2,085ft/s 33.9G 21,783ft 30.6s 27s
OK Cesaroni L730 8.95lb 135ft/s 2,044ft/s 29.6G 21,938ft 30.7s 27s
OK Loki L1400 9.60lb 151ft/s 2,228ft/s 50.8G 21,961ft 30.6s 29s
OK Cesaroni L265 9.47lb 77ft/s 1,512ft/s 10.0G 22,160ft 33.9s 23s
OK Cesaroni L640 8.95lb 146ft/s 1,913ft/s 38.6G 22,201ft 31.1s 26s
OK Cesaroni L935 9.60lb 140ft/s 2,240ft/s 35.1G 23,153ft 31.1s 28s
OK Loki L1040 10.53lb 132ft/s 2,454ft/s 31.4G 26,434ft 33.1s 29s
warningsD AMW K590 7.79lb 17:1 thrust/weight ratio (no data)
warningsD Gorilla K695 7.30lb 21:1 thrust/weight ratio (no data)
warningsD Gorilla K828 8.05lb 23:1 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.

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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