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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 43 motors that fit and appear to have enough thrust (681 motors didn't fit, 73 motors failed safety checks). 114 motor had thrust curves available and 228 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:   Madcow Superbatray XL
Owner: Louie Berlin
Body Diameter: 4.00in
Dry Weight: 5.50lb
MMT Diameter: 29.0mm
MMT Length: 38.00in
CD: 1.00

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 G250 5.81lb 70ft/s 122ft/s 10.1G 229ft 3.9s 3s
OK Cesaroni G125 5.93lb 49ft/s 151ft/s 5.1G 396ft 5.4s 4s
OK AeroTech H165 5.94lb 55ft/s 161ft/s 6.2G 411ft 5.3s 4s
OK Cesaroni H133 5.92lb 49ft/s 156ft/s 6.3G 416ft 5.5s 4s
OK Cesaroni H175 6.04lb 53ft/s 168ft/s 7.7G 431ft 5.4s 4s
OK AeroTech G138 5.83lb 48ft/s 169ft/s 6.2G 441ft 5.6s 4s
OK Cesaroni H163 5.91lb 54ft/s 168ft/s 7.2G 442ft 5.5s 4s
OK AeroTech H128 5.95lb 53ft/s 166ft/s 5.9G 454ft 5.6s 4s
OK Cesaroni H410 5.90lb 92ft/s 191ft/s 18.8G 471ft 5.4s 5s
OK AeroTech H238 5.93lb 63ft/s 179ft/s 8.0G 478ft 5.6s 5s
OK Cesaroni H151 6.02lb 55ft/s 197ft/s 6.6G 609ft 6.4s 5s
OK Cesaroni H237 6.15lb 63ft/s 213ft/s 9.6G 610ft 6.2s 5s
OK AeroTech H220 6.05lb 68ft/s 213ft/s 10.4G 619ft 6.3s 5s
OK AeroTech H210 6.04lb 63ft/s 214ft/s 8.6G 629ft 6.4s 5s
OK KBA H130 7.06lb 49ft/s 188ft/s 6.0G 639ft 6.7s 5s
OK Cesaroni H135 6.05lb 49ft/s 199ft/s 5.1G 640ft 6.7s 5s
OK Cesaroni H160 6.10lb 51ft/s 211ft/s 5.8G 656ft 6.7s 5s
OK AeroTech H182 5.96lb 54ft/s 218ft/s 6.2G 661ft 6.6s 5s
OK Cesaroni H170 6.01lb 59ft/s 212ft/s 7.9G 661ft 6.6s 5s
OK AeroTech H180 6.06lb 61ft/s 224ft/s 8.5G 705ft 6.7s 5s
OK AeroTech H250 6.06lb 75ft/s 240ft/s 10.9G 732ft 6.7s 6s
OK KBA H225 6.20lb 59ft/s 243ft/s 8.8G 755ft 7.0s 6s
OK AeroTech H195 5.93lb 65ft/s 241ft/s 8.6G 768ft 7.0s 6s
OK Cesaroni H295 6.25lb 72ft/s 262ft/s 12.0G 809ft 7.0s 6s
OK Cesaroni H180 6.19lb 60ft/s 244ft/s 8.8G 826ft 7.2s 6s
OK Cesaroni H194 6.13lb 64ft/s 249ft/s 9.3G 829ft 7.2s 6s
OK Cesaroni H200 6.10lb 63ft/s 253ft/s 9.7G 853ft 7.3s 6s
OK Cesaroni H140 6.11lb 58ft/s 237ft/s 8.0G 873ft 7.6s 6s
OK Cesaroni H255 6.01lb 73ft/s 280ft/s 13.1G 922ft 7.3s 6s
OK Cesaroni H340 6.36lb 83ft/s 296ft/s 14.7G 950ft 7.4s 6s
OK Cesaroni H399 6.15lb 90ft/s 304ft/s 18.9G 957ft 7.4s 7s
OK Cesaroni H159 6.26lb 53ft/s 267ft/s 5.7G 987ft 8.0s 6s
OK Cesaroni H226 6.29lb 70ft/s 290ft/s 11.5G 1,031ft 7.8s 6s
OK AeroTech H268 6.29lb 72ft/s 303ft/s 10.8G 1,044ft 7.8s 7s
OK Cesaroni H233 6.22lb 71ft/s 300ft/s 11.3G 1,065ft 7.9s 7s
OK Cesaroni H160 6.20lb 65ft/s 272ft/s 10.5G 1,066ft 8.1s 6s
OK Cesaroni H255 6.20lb 76ft/s 312ft/s 14.0G 1,092ft 7.9s 7s
OK AeroTech I200 6.29lb 69ft/s 296ft/s 9.8G 1,113ft 8.2s 6s
OK Cesaroni I204 6.27lb 71ft/s 316ft/s 11.8G 1,207ft 8.4s 7s
OK AeroTech I205 6.19lb 63ft/s 318ft/s 12.2G 1,213ft 8.4s 7s
OK Cesaroni I224 6.32lb 77ft/s 344ft/s 14.4G 1,338ft 8.7s 7s
OK Cesaroni I243 6.38lb 73ft/s 348ft/s 14.4G 1,344ft 8.7s 7s
OK KBA J520 7.09lb 91ft/s 573ft/s 21.6G 2,137ft 10.2s 9s

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
failed5 Estes E16 average thrust fails 5:1 thrust/weight ratio (1:1)
failed5 AeroTech E23 average thrust fails 5:1 thrust/weight ratio (1:1)
failed5 AeroTech E16 average thrust fails 5:1 thrust/weight ratio (1:1)
failedG AeroTech F23 speed at end of launch guide too slow (13ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (19ft/s)
failedG AeroTech F27 speed at end of launch guide too slow (10ft/s)
failed5 Estes F15 average thrust fails 5:1 thrust/weight ratio (1:1)
failedG AeroTech F37 speed at end of launch guide too slow (18ft/s)
failedG AeroTech F62 speed at end of launch guide too slow (27ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (19ft/s)
failedG AeroTech F20 speed at end of launch guide too slow (16ft/s)
failedG Cesaroni F32 speed at end of launch guide too slow (13ft/s)
failedG AeroTech F42 speed at end of launch guide too slow (25ft/s)
failedG Cesaroni F29 speed at end of launch guide too slow (10ft/s)
failedG Cesaroni F31 speed at end of launch guide too slow (13ft/s)
failedG Cesaroni F120 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni F59 speed at end of launch guide too slow (29ft/s)
failedG AeroTech F67 speed at end of launch guide too slow (35ft/s)
failed5 Estes F26 average thrust fails 5:1 thrust/weight ratio (1:1)
failedG AeroTech F26 speed at end of launch guide too slow (11ft/s)
failed5 AeroTech F22 average thrust fails 5:1 thrust/weight ratio (1:1)
failedG AeroTech F52 speed at end of launch guide too slow (30ft/s)
failed5 Apogee F10 average thrust fails 5:1 thrust/weight ratio (0:1)
failedG AeroTech F50 speed at end of launch guide too slow (29ft/s)
failedG Estes F50 speed at end of launch guide too slow (32ft/s)
failedG AeroTech F25 speed at end of launch guide too slow (21ft/s)
failedG AeroTech F40 speed at end of launch guide too slow (26ft/s)
failedG AeroTech G54 speed at end of launch guide too slow (31ft/s)
failedG AeroTech G104 speed at end of launch guide too slow (42ft/s)
failedG AeroTech G74 speed at end of launch guide too slow (36ft/s)
failedG Cesaroni G88 speed at end of launch guide too slow (36ft/s)
failedG AeroTech G38 speed at end of launch guide too slow (20ft/s)
failedG AeroTech G53 speed at end of launch guide too slow (32ft/s)
failedG Cesaroni G80 speed at end of launch guide too slow (35ft/s)
failedG Estes G40 speed at end of launch guide too slow (28ft/s)
failedG AeroTech G77 speed at end of launch guide too slow (36ft/s)
failedG AeroTech G77 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni G83 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni G57 speed at end of launch guide too slow (32ft/s)
failedG Cesaroni G68 speed at end of launch guide too slow (31ft/s)
failedG AeroTech G79 speed at end of launch guide too slow (32ft/s)
failedG AeroTech G79 speed at end of launch guide too slow (37ft/s)
failedG AeroTech G78 speed at end of launch guide too slow (37ft/s)
failedG AeroTech G40 speed at end of launch guide too slow (28ft/s)
failedG Cesaroni G126 speed at end of launch guide too slow (47ft/s)
failedG AeroTech G25 speed at end of launch guide too slow (17ft/s)
failedG AeroTech G76 speed at end of launch guide too slow (44ft/s)
failedG AeroTech G64 speed at end of launch guide too slow (39ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni G131 speed at end of launch guide too slow (45ft/s)
failedG AeroTech G125 speed at end of launch guide too slow (47ft/s)
failedG AeroTech G80 speed at end of launch guide too slow (38ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (31ft/s)
failed5 Estes G80 average thrust fails 5:1 thrust/weight ratio (3:1)
failedG Cesaroni G106 speed at end of launch guide too slow (40ft/s)
failedG KBA G82 speed at end of launch guide too slow (34ft/s)
failedG KBA G135 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni G33 speed at end of launch guide too slow (16ft/s)
failedG Cesaroni G118 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni G54 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni H90 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni H54 speed at end of launch guide too slow (33ft/s)
failedG Cesaroni H87 speed at end of launch guide too slow (39ft/s)
failedG AeroTech H115 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni H123 speed at end of launch guide too slow (44ft/s)
failedG AeroTech H97 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni H42 speed at end of launch guide too slow (23ft/s)
failedG RATT H70 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni H118 speed at end of launch guide too slow (48ft/s)
failedG AeroTech H135 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni H53 speed at end of launch guide too slow (31ft/s)
failedG RATT I80 speed at end of launch guide too slow (37ft/s)
failedG RATT I90 speed at end of launch guide too slow (39ft/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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