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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 57 motors that fit and appear to have enough thrust (686 motors didn't fit, 62 motors failed safety checks). 117 motor had thrust curves available and 237 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:   Cherokee-G w/29mm MMT
Owner: Michael Erwin
Body Diameter: 3.10in
Dry Weight: 1,500g
MMT Diameter: 29.0mm
MMT Length: 304.0cm
CD: 0.60

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 G104 1,636g 51ft/s 141ft/s 6.6G 353ft 5.0s 4s
OK AeroTech G76 1,647g 56ft/s 172ft/s 8.3G 584ft 6.4s 4s
OK Cesaroni G250 1,641g 79ft/s 206ft/s 17.0G 585ft 6.1s 6s
OK Cesaroni G126 1,645g 57ft/s 200ft/s 8.8G 613ft 6.4s 5s
OK Cesaroni G131 1,700g 53ft/s 211ft/s 8.3G 669ft 6.7s 6s
OK AeroTech G125 1,625g 55ft/s 220ft/s 8.7G 709ft 6.8s 6s
OK KBA G135 1,726g 53ft/s 240ft/s 8.4G 821ft 7.4s 6s
OK Cesaroni G54 1,693g 48ft/s 203ft/s 6.3G 933ft 8.3s 5s
OK Cesaroni G118 1,688g 52ft/s 261ft/s 8.4G 981ft 8.0s 7s
OK Cesaroni G125 1,695g 57ft/s 264ft/s 8.7G 987ft 8.0s 7s
OK AeroTech H165 1,702g 64ft/s 275ft/s 10.5G 1,009ft 8.0s 7s
OK RATT H70 1,852g 51ft/s 231ft/s 6.5G 1,025ft 8.5s 6s
OK Cesaroni H133 1,690g 57ft/s 271ft/s 10.6G 1,029ft 8.1s 7s
OK Cesaroni H90 1,663g 51ft/s 258ft/s 8.5G 1,038ft 8.4s 7s
OK Cesaroni H175 1,747g 65ft/s 283ft/s 12.9G 1,039ft 8.0s 7s
OK Cesaroni H163 1,687g 63ft/s 287ft/s 12.1G 1,077ft 8.2s 7s
OK AeroTech G138 1,648g 55ft/s 294ft/s 10.7G 1,096ft 8.3s 7s
OK AeroTech H128 1,706g 62ft/s 286ft/s 9.9G 1,105ft 8.3s 7s
OK Cesaroni H410 1,682g 104ft/s 314ft/s 30.8G 1,112ft 8.0s 8s
OK Cesaroni H123 1,728g 51ft/s 284ft/s 7.4G 1,117ft 8.5s 7s
OK AeroTech H238 1,696g 73ft/s 302ft/s 13.4G 1,143ft 8.3s 7s
OK AeroTech H115 1,705g 51ft/s 285ft/s 6.4G 1,149ft 8.7s 7s
OK Cesaroni H118 1,732g 56ft/s 294ft/s 9.0G 1,226ft 8.8s 7s
OK KBA H130 2,209g 54ft/s 301ft/s 9.1G 1,376ft 9.5s 8s
OK Cesaroni H237 1,794g 72ft/s 353ft/s 15.9G 1,398ft 9.1s 8s
OK AeroTech H220 1,750g 77ft/s 353ft/s 16.9G 1,420ft 9.1s 8s
OK Cesaroni H151 1,738g 65ft/s 337ft/s 10.9G 1,424ft 9.3s 8s
OK AeroTech H210 1,746g 74ft/s 358ft/s 14.3G 1,451ft 9.2s 8s
OK Cesaroni H135 1,751g 57ft/s 344ft/s 8.6G 1,499ft 9.6s 8s
OK Cesaroni H160 1,772g 60ft/s 358ft/s 9.7G 1,517ft 9.6s 8s
OK Cesaroni H170 1,732g 69ft/s 358ft/s 13.0G 1,524ft 9.5s 8s
OK AeroTech H182 1,707g 62ft/s 371ft/s 10.6G 1,542ft 9.6s 8s
OK AeroTech H180 1,752g 71ft/s 377ft/s 14.0G 1,605ft 9.7s 8s
OK AeroTech H135 1,712g 56ft/s 352ft/s 8.2G 1,629ft 10.1s 8s
OK AeroTech H250 1,756g 86ft/s 397ft/s 17.8G 1,648ft 9.7s 9s
OK KBA H225 1,816g 64ft/s 402ft/s 14.4G 1,697ft 9.9s 9s
OK AeroTech H195 1,697g 74ft/s 409ft/s 14.3G 1,744ft 10.0s 9s
OK Cesaroni H295 1,842g 86ft/s 425ft/s 19.7G 1,779ft 10.0s 9s
OK Cesaroni H180 1,814g 72ft/s 406ft/s 14.2G 1,832ft 10.3s 9s
OK Cesaroni H194 1,784g 72ft/s 415ft/s 15.1G 1,846ft 10.2s 9s
OK Cesaroni H200 1,774g 74ft/s 422ft/s 15.7G 1,893ft 10.3s 9s
OK Cesaroni H140 1,777g 69ft/s 403ft/s 13.1G 1,949ft 10.7s 9s
OK Cesaroni H255 1,732g 86ft/s 464ft/s 21.1G 2,023ft 10.4s 9s
OK Cesaroni H340 1,891g 96ft/s 475ft/s 22.9G 2,036ft 10.4s 10s
OK Cesaroni H399 1,794g 102ft/s 491ft/s 30.0G 2,069ft 10.5s 10s
OK Cesaroni H159 1,843g 63ft/s 450ft/s 9.4G 2,163ft 11.2s 9s
OK Cesaroni H226 1,860g 79ft/s 474ft/s 18.2G 2,206ft 10.9s 9s
OK AeroTech H268 1,858g 84ft/s 494ft/s 17.2G 2,235ft 11.0s 10s
OK Cesaroni H233 1,828g 79ft/s 493ft/s 18.0G 2,282ft 11.1s 10s
OK Cesaroni H160 1,819g 80ft/s 455ft/s 16.7G 2,297ft 11.3s 9s
OK Cesaroni H255 1,818g 89ft/s 511ft/s 22.2G 2,331ft 11.1s 10s
OK AeroTech I200 1,858g 78ft/s 488ft/s 15.6G 2,369ft 11.3s 10s
OK Cesaroni I204 1,849g 84ft/s 521ft/s 18.7G 2,546ft 11.6s 10s
OK AeroTech I205 1,815g 73ft/s 528ft/s 19.4G 2,566ft 11.7s 10s
OK Cesaroni I224 1,870g 88ft/s 561ft/s 22.6G 2,780ft 11.9s 10s
OK Cesaroni I243 1,899g 85ft/s 568ft/s 22.4G 2,786ft 12.0s 10s
warningsD Estes G80 1,628g 5:1 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 Estes E16 speed at end of launch guide too slow (10ft/s)
failedG AeroTech E23 speed at end of launch guide too slow (22ft/s)
failedG AeroTech E16 speed at end of launch guide too slow (15ft/s)
failedG AeroTech F23 speed at end of launch guide too slow (25ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (26ft/s)
failedG AeroTech F27 speed at end of launch guide too slow (23ft/s)
failedG Estes F15 speed at end of launch guide too slow (4ft/s)
failedG AeroTech F37 speed at end of launch guide too slow (28ft/s)
failedG AeroTech F62 speed at end of launch guide too slow (35ft/s)
failedG Cesaroni F36 speed at end of launch guide too slow (27ft/s)
failedG AeroTech F20 speed at end of launch guide too slow (27ft/s)
failedG Cesaroni F32 speed at end of launch guide too slow (23ft/s)
failedG AeroTech F42 speed at end of launch guide too slow (35ft/s)
failedG Cesaroni F29 speed at end of launch guide too slow (21ft/s)
failedG Cesaroni F31 speed at end of launch guide too slow (24ft/s)
failedA Cesaroni F120 rocket doesn't reach a safe altitude (166ft)
failedG Cesaroni F59 speed at end of launch guide too slow (37ft/s)
failedG AeroTech F67 speed at end of launch guide too slow (44ft/s)
failed5 Estes F26 average thrust fails 5:1 thrust/weight ratio (2:1)
failedG AeroTech F26 speed at end of launch guide too slow (22ft/s)
failedG AeroTech F22 speed at end of launch guide too slow (19ft/s)
failedG AeroTech F52 speed at end of launch guide too slow (40ft/s)
failedG Apogee F10 speed at end of launch guide too slow (9ft/s)
failedG AeroTech F50 speed at end of launch guide too slow (38ft/s)
failedG Estes F50 speed at end of launch guide too slow (40ft/s)
failedG AeroTech F25 speed at end of launch guide too slow (31ft/s)
failedG AeroTech F40 speed at end of launch guide too slow (35ft/s)
failedG AeroTech G54 speed at end of launch guide too slow (40ft/s)
failedG AeroTech G74 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni G88 speed at end of launch guide too slow (44ft/s)
failedG AeroTech G38 speed at end of launch guide too slow (29ft/s)
failedG AeroTech G53 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni G80 speed at end of launch guide too slow (42ft/s)
failedG Estes G40 speed at end of launch guide too slow (36ft/s)
failedG AeroTech G77 speed at end of launch guide too slow (43ft/s)
failedG AeroTech G77 speed at end of launch guide too slow (40ft/s)
failedG AeroTech G72 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni G83 speed at end of launch guide too slow (45ft/s)
failedG Cesaroni G57 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni G68 speed at end of launch guide too slow (39ft/s)
failedG AeroTech G79 speed at end of launch guide too slow (38ft/s)
failedG AeroTech G79 speed at end of launch guide too slow (44ft/s)
failedG AeroTech G78 speed at end of launch guide too slow (44ft/s)
failedG AeroTech G40 speed at end of launch guide too slow (36ft/s)
failedG AeroTech G25 speed at end of launch guide too slow (25ft/s)
failedG AeroTech G64 speed at end of launch guide too slow (47ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (45ft/s)
failedG AeroTech G80 speed at end of launch guide too slow (47ft/s)
failedG AeroTech G75 speed at end of launch guide too slow (37ft/s)
failed5 AeroTech G8 average thrust fails 5:1 thrust/weight ratio (1:1)
failedG Cesaroni G106 speed at end of launch guide too slow (46ft/s)
failedG AeroTech G11 speed at end of launch guide too slow (11ft/s)
failedG AeroTech G12 speed at end of launch guide too slow (13ft/s)
failedG KBA G82 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni G33 speed at end of launch guide too slow (24ft/s)
failedG Cesaroni H54 speed at end of launch guide too slow (42ft/s)
failedG Cesaroni H87 speed at end of launch guide too slow (46ft/s)
failedG AeroTech H97 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni H42 speed at end of launch guide too slow (30ft/s)
failedG Cesaroni H53 speed at end of launch guide too slow (38ft/s)
failedG RATT I80 speed at end of launch guide too slow (41ft/s)
failedG RATT I90 speed at end of launch guide too slow (46ft/s)

G These simulations were run with a launch guide length of 7ft (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:
Unable to generate download file from guide run!
Client: 3.93.74.227
Protocol: HTTP/1.1
URI: /motorguide.jsp
Method: GET
Query: rocket=7778

java.io.FileNotFoundException: /home/orgthrus/public_html/guide/KUNYZDC/Cherokee-G_w/29mm_MMT-results-pass.csv (No such file or directory)

  1. java.io.FileOutputStream.open(Native Method)
  2. java.io.FileOutputStream.(FileOutputStream.java:179)
  3. java.io.FileOutputStream.(FileOutputStream.java:131)
  4. java.io.FileWriter.(FileWriter.java:73)
  5. org.thrustcurve.sim.GuideExporter.export(GuideExporter.java:100)
  6. org.thrustcurve.jsp.GuideResultATag.doTag(GuideResultATag.java:184)
  7. org.thrustcurve.jsp.SimpleTagBase.doStartTag(SimpleTagBase.java:16)
  8. org.apache.jsp.motorguide_jsp._jspx_meth_tc_005fguideResultA_005f0(motorguide_jsp.java:1062)
  9. org.apache.jsp.motorguide_jsp._jspService(motorguide_jsp.java:988)
  10. org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
  11. javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
  12. org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:371)
  13. org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:308)
  14. org.apache.jasper.servlet.JspServlet.service(JspServlet.java:259)
  15. javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
  16. org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
  17. org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
  18. org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
  19. org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
  20. org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
  21. org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
  22. org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
  23. org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
  24. org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
  25. org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)
  26. org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:775)
  27. org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:704)
  28. org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:897)
  29. org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
  30. java.lang.Thread.run(Thread.java:595)

Please let us know about this problem (including the above info).

,
Unable to generate download file from guide run!
Client: 3.93.74.227
Protocol: HTTP/1.1
URI: /motorguide.jsp
Method: GET
Query: rocket=7778

java.io.FileNotFoundException: /home/orgthrus/public_html/guide/KUNYZDC/Cherokee-G_w/29mm_MMT-results-fail.csv (No such file or directory)

  1. java.io.FileOutputStream.open(Native Method)
  2. java.io.FileOutputStream.(FileOutputStream.java:179)
  3. java.io.FileOutputStream.(FileOutputStream.java:131)
  4. java.io.FileWriter.(FileWriter.java:73)
  5. org.thrustcurve.sim.GuideExporter.export(GuideExporter.java:100)
  6. org.thrustcurve.jsp.GuideResultATag.doTag(GuideResultATag.java:184)
  7. org.thrustcurve.jsp.SimpleTagBase.doStartTag(SimpleTagBase.java:16)
  8. org.apache.jsp.motorguide_jsp._jspx_meth_tc_005fguideResultA_005f1(motorguide_jsp.java:1083)
  9. org.apache.jsp.motorguide_jsp._jspService(motorguide_jsp.java:992)
  10. org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
  11. javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
  12. org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:371)
  13. org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:308)
  14. org.apache.jasper.servlet.JspServlet.service(JspServlet.java:259)
  15. javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
  16. org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
  17. org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
  18. org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
  19. org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
  20. org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
  21. org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
  22. org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
  23. org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
  24. org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
  25. org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)
  26. org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:775)
  27. org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:704)
  28. org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:897)
  29. org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
  30. java.lang.Thread.run(Thread.java:595)

Please let us know about this problem (including the above info).

, or
Unable to generate download file from guide run!
Client: 3.93.74.227
Protocol: HTTP/1.1
URI: /motorguide.jsp
Method: GET
Query: rocket=7778

java.io.FileNotFoundException: /home/orgthrus/public_html/guide/KUNYZDC/Cherokee-G_w/29mm_MMT-results-all.csv (No such file or directory)

  1. java.io.FileOutputStream.open(Native Method)
  2. java.io.FileOutputStream.(FileOutputStream.java:179)
  3. java.io.FileOutputStream.(FileOutputStream.java:131)
  4. java.io.FileWriter.(FileWriter.java:73)
  5. org.thrustcurve.sim.GuideExporter.export(GuideExporter.java:100)
  6. org.thrustcurve.jsp.GuideResultATag.doTag(GuideResultATag.java:184)
  7. org.thrustcurve.jsp.SimpleTagBase.doStartTag(SimpleTagBase.java:16)
  8. org.apache.jsp.motorguide_jsp._jspx_meth_tc_005fguideResultA_005f2(motorguide_jsp.java:1104)
  9. org.apache.jsp.motorguide_jsp._jspService(motorguide_jsp.java:997)
  10. org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
  11. javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
  12. org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:371)
  13. org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:308)
  14. org.apache.jasper.servlet.JspServlet.service(JspServlet.java:259)
  15. javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
  16. org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
  17. org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
  18. org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
  19. org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
  20. org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
  21. org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
  22. org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
  23. org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
  24. org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
  25. org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)
  26. org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:775)
  27. org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:704)
  28. org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:897)
  29. org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
  30. java.lang.Thread.run(Thread.java:595)

Please let us know about this problem (including the above info).

.
 
RockSim  
Unable to generate download file from guide run!
Client: 3.93.74.227
Protocol: HTTP/1.1
URI: /motorguide.jsp
Method: GET
Query: rocket=7778

java.io.FileNotFoundException: /home/orgthrus/public_html/guide/KUNYZDC/Cherokee-G_w/29mm_MMT-smartsim-all.csv (No such file or directory)

  1. java.io.FileOutputStream.open(Native Method)
  2. java.io.FileOutputStream.(FileOutputStream.java:179)
  3. java.io.FileOutputStream.(FileOutputStream.java:131)
  4. java.io.FileWriter.(FileWriter.java:73)
  5. org.thrustcurve.sim.GuideExporter.export(GuideExporter.java:100)
  6. org.thrustcurve.jsp.GuideResultATag.doTag(GuideResultATag.java:184)
  7. org.thrustcurve.jsp.SimpleTagBase.doStartTag(SimpleTagBase.java:16)
  8. org.apache.jsp.motorguide_jsp._jspx_meth_tc_005fguideResultA_005f3(motorguide_jsp.java:1124)
  9. org.apache.jsp.motorguide_jsp._jspService(motorguide_jsp.java:1008)
  10. org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
  11. javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
  12. org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:371)
  13. org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:308)
  14. org.apache.jasper.servlet.JspServlet.service(JspServlet.java:259)
  15. javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
  16. org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
  17. org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
  18. org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
  19. org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
  20. org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
  21. org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
  22. org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
  23. org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
  24. org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
  25. org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)
  26. org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:775)
  27. org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:704)
  28. org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:897)
  29. org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
  30. java.lang.Thread.run(Thread.java:595)

Please let us know about this problem (including the above info).

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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