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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 46 motors that fit and appear to have enough thrust (720 motors didn't fit, 25 motors failed safety checks). 70 motor had thrust curves available and 141 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:   SEVRA Rocket MkII
Owner: Phill Ash
Body Diameter: 8.38in
Dry Weight: 56.72lb
MMT Diameter: 98.0mm
MMT Length: 49.00in
CD: 0.50

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 K1620 63.50lb 49ft/s 231ft/s 5.6G 930ft 8.2s 7s
OK AeroTech K1999 63.31lb 55ft/s 250ft/s 6.5G 1,040ft 8.5s 7s
OK AeroTech L2500 67.72lb 62ft/s 443ft/s 8.5G 2,729ft 13.3s 11s
OK Cesaroni L3150 67.15lb 69ft/s 474ft/s 11.3G 2,924ft 13.5s 12s
OK AeroTech M4500 71.32lb 83ft/s 691ft/s 16.9G 4,951ft 16.7s 15s
OK Cesaroni M2505 70.50lb 59ft/s 650ft/s 8.5G 5,019ft 17.5s 15s
OK Cesaroni M4770 71.06lb 81ft/s 711ft/s 17.6G 5,042ft 16.9s 15s
OK AeroTech M2100 71.97lb 56ft/s 633ft/s 8.4G 5,149ft 17.9s 14s
OK AeroTech M2400 70.94lb 59ft/s 652ft/s 7.7G 5,172ft 17.8s 14s
OK AeroTech M1800 76.92lb 48ft/s 610ft/s 7.4G 5,255ft 18.6s 14s
OK AeroTech M1845 71.45lb 54ft/s 637ft/s 6.7G 5,508ft 18.7s 14s
OK Cesaroni M6400 74.18lb 101ft/s 814ft/s 21.7G 5,919ft 17.8s 16s
OK AeroTech M2000 76.53lb 52ft/s 697ft/s 5.9G 6,126ft 19.7s 15s
OK AeroTech M2500 74.50lb 61ft/s 769ft/s 7.7G 6,579ft 19.7s 15s
OK AeroTech M6000 75.37lb 90ft/s 880ft/s 20.7G 6,596ft 18.7s 17s
OK Cesaroni M1890 76.17lb 49ft/s 721ft/s 5.7G 6,705ft 20.7s 15s
OK Cesaroni M1800 75.11lb 51ft/s 720ft/s 5.5G 6,777ft 20.7s 15s
OK Cesaroni M1450 75.63lb 54ft/s 660ft/s 6.2G 6,784ft 21.1s 14s
OK Cesaroni M3400 74.60lb 69ft/s 855ft/s 11.0G 6,955ft 19.7s 17s
OK Cesaroni N10000 78.59lb 123ft/s 955ft/s 33.7G 6,971ft 18.8s 18s
OK AeroTech N2220 83.17lb 56ft/s 751ft/s 7.0G 7,005ft 20.7s 15s
OK AeroTech M1939 76.54lb 49ft/s 702ft/s 5.5G 7,037ft 21.2s 14s
OK Cesaroni N1800 76.96lb 50ft/s 726ft/s 5.4G 7,045ft 21.2s 15s
OK Cesaroni N2600 82.03lb 56ft/s 823ft/s 7.3G 7,344ft 20.9s 17s
OK Gorilla N2717 79.07lb 56ft/s 829ft/s 11.0G 7,412ft 20.6s 16s
OK Cesaroni N2200 81.76lb 55ft/s 826ft/s 6.5G 8,078ft 22.1s 16s
OK Loki N3800 82.29lb 77ft/s 953ft/s 12.7G 8,338ft 21.1s 18s
OK AeroTech N2000 83.80lb 58ft/s 822ft/s 7.0G 8,793ft 23.0s 15s
OK Gorilla N1720 90.72lb 62ft/s 769ft/s 8.0G 9,052ft 23.5s 15s
OK Cesaroni N5600 81.59lb 89ft/s 1,118ft/s 17.4G 9,101ft 21.3s 19s
OK Cesaroni N2500 82.44lb 67ft/s 920ft/s 9.0G 9,176ft 22.7s 17s
OK AeroTech N3300 83.29lb 61ft/s 1,013ft/s 9.9G 9,189ft 22.4s 18s
OK Cesaroni N2850 82.49lb 63ft/s 983ft/s 8.1G 9,264ft 22.7s 18s
OK Cesaroni N3400 87.52lb 61ft/s 1,021ft/s 9.4G 9,307ft 22.6s 18s
OK AeroTech N1000 84.88lb 48ft/s 648ft/s 4.6G 9,429ft 26.6s 10s
OK Cesaroni N3180 83.61lb 65ft/s 1,029ft/s 9.3G 9,514ft 22.8s 18s
OK Cesaroni N1100 82.27lb 57ft/s 687ft/s 6.4G 9,621ft 25.6s 13s
OK Cesaroni N2501 86.06lb 62ft/s 974ft/s 8.1G 10,106ft 23.8s 18s
OK Cesaroni N1560 91.68lb 57ft/s 809ft/s 6.9G 10,951ft 26.3s 16s
OK Cesaroni N3800 88.16lb 74ft/s 1,182ft/s 11.2G 11,240ft 23.9s 19s
OK Cesaroni N4100 89.23lb 72ft/s 1,241ft/s 11.4G 11,320ft 23.9s 20s
OK Cesaroni N2540 92.61lb 54ft/s 1,059ft/s 6.1G 11,465ft 25.5s 18s
OK Cesaroni N2900 87.95lb 68ft/s 1,100ft/s 9.3G 11,535ft 24.8s 19s
OK Cesaroni N3301 93.15lb 69ft/s 1,162ft/s 11.0G 12,007ft 24.9s 19s
OK Cesaroni N5800 89.41lb 89ft/s 1,420ft/s 16.9G 12,529ft 24.0s 20s
OK Cesaroni O3400 93.85lb 72ft/s 1,238ft/s 10.1G 12,902ft 25.4s 19s

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 K680 speed at end of launch guide too slow (28ft/s)
failedG AeroTech K650 speed at end of launch guide too slow (25ft/s)
failedG AeroTech K458 speed at end of launch guide too slow (19ft/s)
failedG AeroTech L339 speed at end of launch guide too slow (15ft/s)
failedG AeroTech L1300 speed at end of launch guide too slow (42ft/s)
failedG AeroTech L400 speed at end of launch guide too slow (23ft/s)
failedG AeroTech L952 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni L610 speed at end of launch guide too slow (31ft/s)
failedG AeroTech L1500 speed at end of launch guide too slow (48ft/s)
failedG Cesaroni M1560 speed at end of launch guide too slow (46ft/s)
failedG AeroTech M1075 speed at end of launch guide too slow (34ft/s)
failedG AeroTech M1305 speed at end of launch guide too slow (43ft/s)
failedG AeroTech M1600 speed at end of launch guide too slow (46ft/s)
failedG AeroTech M1340 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni M520 speed at end of launch guide too slow (35ft/s)
failedG Cesaroni M1060 speed at end of launch guide too slow (43ft/s)
failed5 Gorilla M1565 average thrust fails 5:1 thrust/weight ratio (4:1)
failedG Cesaroni M1520 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni M1290 speed at end of launch guide too slow (41ft/s)
failedG AeroTech M1419 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni M1790 speed at end of launch guide too slow (46ft/s)
failedG AeroTech M750 speed at end of launch guide too slow (31ft/s)
failedG Gorilla M1025 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni M795 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni N1975 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.)

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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