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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 93 motors that fit and appear to have enough thrust (609 motors didn't fit, 89 motors failed safety checks). 179 motor had thrust curves available and 323 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:   UFO Invader 4x
Owner: Phill Ash
Body Diameter: 5.25in
Dry Weight: 27.32lb
MMT Diameter: 54.0mm
MMT Length: 36.00in
CD: 1.30

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 J1055 29.02lb 69ft/s 162ft/s 7.7G 424ft 5.4s 5s
OK AeroTech J1299 29.15lb 80ft/s 190ft/s 10.3G 554ft 6.1s 5s
OK AMW J1365 29.78lb 81ft/s 206ft/s 10.7G 634ft 6.4s 6s
OK Gorilla J535 30.02lb 49ft/s 204ft/s 4.1G 771ft 7.6s 5s
OK AMW J440 30.02lb 54ft/s 199ft/s 5.0G 782ft 7.6s 5s
OK Cesaroni J1520 29.58lb 84ft/s 240ft/s 11.7G 818ft 7.2s 6s
OK AeroTech J540 29.71lb 50ft/s 207ft/s 4.1G 819ft 7.9s 6s
OK AeroTech J1799 29.76lb 94ft/s 243ft/s 15.0G 826ft 7.2s 7s
OK Loki J820 29.98lb 63ft/s 228ft/s 6.8G 861ft 7.7s 6s
OK AMW J745 30.00lb 58ft/s 235ft/s 5.5G 908ft 8.0s 6s
OK AMW K1720 30.29lb 91ft/s 262ft/s 13.5G 941ft 7.7s 7s
OK AeroTech J800 29.71lb 60ft/s 244ft/s 6.2G 1,000ft 8.4s 6s
OK Cesaroni J760 29.69lb 58ft/s 252ft/s 5.8G 1,011ft 8.4s 7s
OK AMW K665 31.14lb 51ft/s 248ft/s 5.0G 1,042ft 8.7s 7s
OK AMW K535 30.75lb 48ft/s 246ft/s 3.6G 1,122ft 9.3s 7s
OK Gorilla K630 30.75lb 51ft/s 259ft/s 4.9G 1,129ft 9.0s 7s
OK AeroTech K535 30.10lb 48ft/s 246ft/s 3.8G 1,151ft 9.3s 6s
OK AMW K455 30.63lb 51ft/s 237ft/s 4.7G 1,184ft 9.5s 6s
OK KBA K700 30.63lb 55ft/s 277ft/s 5.7G 1,188ft 9.1s 7s
OK AeroTech K2050 30.16lb 96ft/s 312ft/s 14.9G 1,235ft 8.7s 8s
OK AMW K610 31.21lb 50ft/s 267ft/s 4.4G 1,244ft 9.6s 7s
OK AeroTech K695 30.59lb 56ft/s 278ft/s 5.7G 1,258ft 9.4s 7s
OK Cesaroni K2045 30.16lb 98ft/s 319ft/s 15.5G 1,264ft 8.7s 8s
OK AeroTech K550 30.59lb 51ft/s 271ft/s 5.0G 1,386ft 10.1s 7s
OK Cesaroni K445 30.40lb 49ft/s 259ft/s 3.9G 1,386ft 10.4s 7s
OK AeroTech K540 30.13lb 53ft/s 276ft/s 5.4G 1,392ft 10.0s 7s
OK AMW K935 30.64lb 67ft/s 311ft/s 6.9G 1,392ft 9.5s 8s
OK AMW K700 31.92lb 52ft/s 297ft/s 5.0G 1,407ft 10.0s 8s
OK Loki K690 32.61lb 49ft/s 300ft/s 4.7G 1,413ft 10.0s 8s
OK AeroTech K1100 30.26lb 71ft/s 320ft/s 8.9G 1,447ft 9.6s 8s
OK Gorilla K700 31.10lb 53ft/s 307ft/s 4.7G 1,468ft 10.2s 8s
OK Cesaroni K940 30.33lb 64ft/s 327ft/s 7.2G 1,498ft 9.9s 8s
OK Cesaroni K630 30.42lb 52ft/s 303ft/s 4.8G 1,503ft 10.4s 8s
OK Cesaroni K650 31.70lb 48ft/s 311ft/s 4.1G 1,525ft 10.6s 8s
OK AMW K855 31.99lb 60ft/s 324ft/s 6.2G 1,529ft 10.1s 8s
OK Gorilla K763 31.27lb 56ft/s 321ft/s 5.3G 1,535ft 10.3s 8s
OK AeroTech K805 30.72lb 57ft/s 326ft/s 5.5G 1,590ft 10.4s 8s
OK AMW K710 31.31lb 58ft/s 316ft/s 5.3G 1,612ft 10.5s 8s
OK AMW K670 31.47lb 56ft/s 318ft/s 4.9G 1,613ft 10.6s 8s
OK Gorilla K805 31.23lb 58ft/s 332ft/s 6.9G 1,619ft 10.4s 8s
OK AMW K580 31.33lb 57ft/s 308ft/s 6.7G 1,679ft 10.8s 8s
OK AeroTech K990 31.96lb 61ft/s 353ft/s 6.5G 1,724ft 10.6s 9s
OK AeroTech K850 31.81lb 61ft/s 355ft/s 6.6G 1,729ft 10.7s 9s
OK AeroTech K1103 30.53lb 76ft/s 364ft/s 10.8G 1,740ft 10.4s 9s
OK Cesaroni K740 30.55lb 58ft/s 343ft/s 5.4G 1,755ft 10.9s 8s
OK Loki K527 31.67lb 49ft/s 319ft/s 4.4G 1,816ft 11.6s 7s
OK Cesaroni K635 31.21lb 53ft/s 340ft/s 4.5G 1,855ft 11.4s 8s
OK Loki K960 31.16lb 73ft/s 375ft/s 10.1G 1,881ft 10.8s 9s
OK Cesaroni K675 31.59lb 54ft/s 346ft/s 5.4G 1,882ft 11.4s 8s
OK AMW K1250 31.32lb 78ft/s 389ft/s 10.6G 1,886ft 10.7s 9s
OK Cesaroni K650 31.09lb 56ft/s 344ft/s 7.9G 1,898ft 11.5s 8s
OK Cesaroni K570 31.03lb 57ft/s 339ft/s 5.5G 1,985ft 11.8s 8s
OK Cesaroni K1200 30.91lb 74ft/s 404ft/s 9.0G 1,988ft 11.0s 9s
OK Gorilla K980 32.73lb 66ft/s 390ft/s 8.0G 2,017ft 11.3s 9s
OK Cesaroni K600 31.49lb 52ft/s 349ft/s 4.6G 2,020ft 12.0s 8s
OK AeroTech K828 32.22lb 63ft/s 383ft/s 8.1G 2,028ft 11.4s 9s
OK Cesaroni K780 31.06lb 60ft/s 385ft/s 6.2G 2,085ft 11.7s 9s
OK AeroTech K1275 31.69lb 80ft/s 412ft/s 10.1G 2,102ft 11.3s 9s
OK AeroTech K375 31.96lb 74ft/s 298ft/s 8.4G 2,116ft 12.6s 7s
OK AMW K1075 33.13lb 65ft/s 413ft/s 7.9G 2,153ft 11.6s 9s
OK AeroTech K480 31.90lb 56ft/s 353ft/s 5.4G 2,221ft 12.5s 8s
OK AeroTech K700 31.80lb 63ft/s 381ft/s 6.5G 2,250ft 12.1s 9s
OK Cesaroni K815 32.16lb 58ft/s 408ft/s 7.4G 2,264ft 12.1s 9s
OK Cesaroni K750 31.85lb 60ft/s 398ft/s 5.7G 2,288ft 12.2s 9s
OK Loki K830 32.61lb 51ft/s 430ft/s 6.5G 2,313ft 12.4s 10s
OK Cesaroni K711 32.16lb 59ft/s 392ft/s 9.6G 2,343ft 12.5s 9s
OK Loki K350 32.92lb 52ft/s 294ft/s 7.3G 2,363ft 13.9s 7s
OK Gorilla K1075 32.92lb 67ft/s 441ft/s 7.4G 2,367ft 12.1s 10s
OK Gorilla K470 32.45lb 60ft/s 340ft/s 6.3G 2,401ft 13.0s 8s
OK Cesaroni K820 31.68lb 66ft/s 417ft/s 10.7G 2,401ft 12.3s 9s
OK Cesaroni K1440 31.49lb 86ft/s 472ft/s 12.4G 2,427ft 11.8s 10s
OK Cesaroni K590 31.71lb 76ft/s 366ft/s 11.9G 2,450ft 12.7s 8s
OK Cesaroni K660 31.61lb 62ft/s 400ft/s 6.7G 2,463ft 12.7s 9s
OK KBA K1750 32.97lb 84ft/s 492ft/s 13.6G 2,467ft 11.9s 10s
OK Gorilla K1185 32.92lb 69ft/s 465ft/s 8.5G 2,475ft 12.2s 10s
OK KBA K750 33.13lb 62ft/s 415ft/s 7.0G 2,498ft 12.6s 9s
OK AMW K1130 32.99lb 72ft/s 462ft/s 9.6G 2,546ft 12.3s 10s
OK AeroTech K1050 32.17lb 71ft/s 463ft/s 9.3G 2,561ft 12.4s 10s
OK AMW L1276 33.84lb 72ft/s 492ft/s 8.7G 2,685ft 12.6s 10s
OK AMW L985 32.99lb 71ft/s 465ft/s 9.0G 2,700ft 12.7s 10s
OK AeroTech L1090 32.68lb 69ft/s 471ft/s 8.1G 2,742ft 12.8s 10s
OK KBA L2300 33.11lb 101ft/s 553ft/s 18.8G 2,775ft 12.2s 11s
OK AeroTech L1000 32.15lb 71ft/s 479ft/s 8.3G 2,785ft 12.9s 10s
OK Cesaroni L730 32.27lb 67ft/s 443ft/s 7.5G 2,850ft 13.4s 10s
OK Cesaroni L990 32.24lb 71ft/s 483ft/s 10.3G 2,856ft 13.0s 10s
OK Cesaroni L1030 32.47lb 69ft/s 497ft/s 9.7G 2,873ft 13.1s 10s
OK Cesaroni L640 32.26lb 76ft/s 409ft/s 9.6G 2,877ft 13.5s 9s
OK Loki L1400 32.92lb 78ft/s 530ft/s 11.3G 2,910ft 12.8s 11s
OK Cesaroni L805 32.83lb 63ft/s 462ft/s 9.1G 2,923ft 13.5s 10s
OK Cesaroni L935 32.92lb 70ft/s 511ft/s 9.5G 3,195ft 13.7s 10s
OK Loki L1040 33.85lb 68ft/s 598ft/s 7.8G 3,853ft 14.8s 11s
warningsD Gorilla K695 30.62lb 5:1 thrust/weight ratio (no data)
warningsD Gorilla K828 31.36lb 6:1 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 (9ft/s)
failedG Cesaroni I140 speed at end of launch guide too slow (11ft/s)
failedG AeroTech I215 speed at end of launch guide too slow (25ft/s)
failedA AeroTech I599 rocket doesn't reach a safe altitude (131ft)
failedG AeroTech I229 speed at end of launch guide too slow (27ft/s)
failedG AeroTech I115 speed at end of launch guide too slow (12ft/s)
failedG AeroTech I170 speed at end of launch guide too slow (20ft/s)
failedG Cesaroni I150 speed at end of launch guide too slow (15ft/s)
failedG Cesaroni I445 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni I218 speed at end of launch guide too slow (26ft/s)
failedG Cesaroni I120 speed at end of launch guide too slow (5ft/s)
failedG Cesaroni I165 speed at end of launch guide too slow (17ft/s)
failedG Cesaroni I100 speed at end of launch guide too slow (19ft/s)
failedG AeroTech I65 speed at end of launch guide too slow (10ft/s)
failedG Contrail J245 speed at end of launch guide too slow (31ft/s)
failedG Hypertek J115 speed at end of launch guide too slow (17ft/s)
failedG Contrail J355 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni J250 speed at end of launch guide too slow (25ft/s)
failedG Cesaroni J145 speed at end of launch guide too slow (23ft/s)
failedG AeroTech J250 speed at end of launch guide too slow (32ft/s)
failedG AeroTech J90 speed at end of launch guide too slow (16ft/s)
failedG Cesaroni J280 speed at end of launch guide too slow (28ft/s)
failedG Hypertek J170 speed at end of launch guide too slow (28ft/s)
failedG AeroTech J250 speed at end of launch guide too slow (26ft/s)
failedG Contrail J292 speed at end of launch guide too slow (39ft/s)
failedG Hypertek J250 speed at end of launch guide too slow (34ft/s)
failedG Hypertek J120 speed at end of launch guide too slow (21ft/s)
failedG AeroTech J315 speed at end of launch guide too slow (35ft/s)
failedG AeroTech J180 speed at end of launch guide too slow (31ft/s)
failedG AeroTech J275 speed at end of launch guide too slow (30ft/s)
failedG Hypertek J270 speed at end of launch guide too slow (39ft/s)
failedG AeroTech J460 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni J240 speed at end of launch guide too slow (28ft/s)
failedG Cesaroni J430 speed at end of launch guide too slow (41ft/s)
failedG Hypertek J190 speed at end of launch guide too slow (31ft/s)
failedG Cesaroni J210 speed at end of launch guide too slow (27ft/s)
failedG Cesaroni J293 speed at end of launch guide too slow (30ft/s)
failedG Gorilla J365 speed at end of launch guide too slow (35ft/s)
failedG Cesaroni J244 speed at end of launch guide too slow (25ft/s)
failedG Loki J350 speed at end of launch guide too slow (34ft/s)
failedG Gorilla J167 speed at end of launch guide too slow (28ft/s)
failedG AMW J400 speed at end of launch guide too slow (36ft/s)
failedG Cesaroni J360 speed at end of launch guide too slow (33ft/s)
failedG Gorilla J465 speed at end of launch guide too slow (41ft/s)
failedG AMW J475 speed at end of launch guide too slow (42ft/s)
failedG Gorilla J395 speed at end of launch guide too slow (36ft/s)
failedG Cesaroni J380 speed at end of launch guide too slow (33ft/s)
failedG AeroTech J450 speed at end of launch guide too slow (40ft/s)
failedG Gorilla J485 speed at end of launch guide too slow (43ft/s)
failedG AeroTech J135 speed at end of launch guide too slow (23ft/s)
failedG AMW J395 speed at end of launch guide too slow (40ft/s)
failedG AMW J325 speed at end of launch guide too slow (40ft/s)
failedG Loki J525 speed at end of launch guide too slow (47ft/s)
failedG AeroTech J401 speed at end of launch guide too slow (41ft/s)
failedG Gorilla J450 speed at end of launch guide too slow (41ft/s)
failedG Loki J175 speed at end of launch guide too slow (31ft/s)
failedG Cesaroni J355 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni J295 speed at end of launch guide too slow (37ft/s)
failedG Loki J300 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni J140 speed at end of launch guide too slow (19ft/s)
failedG AeroTech J415 speed at end of launch guide too slow (41ft/s)
failedG AMW J475 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni J449 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni K360 speed at end of launch guide too slow (35ft/s)
failedG AeroTech K456 speed at end of launch guide too slow (40ft/s)
failedG AeroTech K400 speed at end of launch guide too slow (44ft/s)
failedG Gorilla K222 speed at end of launch guide too slow (33ft/s)
failed5 AMW K590 average thrust fails 5:1 thrust/weight ratio (4:1)
failedG Gorilla K520 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni K454 speed at end of launch guide too slow (42ft/s)
failedG Gorilla K555 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni K530 speed at end of launch guide too slow (42ft/s)
failedG AeroTech K185 speed at end of launch guide too slow (30ft/s)
failedG Gorilla K533 speed at end of launch guide too slow (45ft/s)
failedG AeroTech K513 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni K160 speed at end of launch guide too slow (25ft/s)
failedG Cesaroni K500 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni K400 speed at end of launch guide too slow (39ft/s)
failedG Loki K250 speed at end of launch guide too slow (35ft/s)
failedG Gorilla K327 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni K515 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni K520 speed at end of launch guide too slow (46ft/s)
failedG AeroTech K270 speed at end of launch guide too slow (33ft/s)
failedG Cesaroni K490 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni K261 speed at end of launch guide too slow (31ft/s)
failedG Cesaroni K260 speed at end of launch guide too slow (36ft/s)
failedG AeroTech K250 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni K300 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni L265 speed at end of launch guide too slow (34ft/s)

G These simulations were run with a launch guide length of 10ft (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.

A The minimum altitude check is used to ensure that the rocket flies high enough to ensure time for a safe recovery. In addition, many barometric altimeters require a minimum altitude to detect lift-off. (The minimum altitude is 10m or 33ft for an A motor and doubles for each impulse class).

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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