NPU Yan-An 2 Y-2A

 

Professor Xu Xianong was the founder of the NPU’s helicopter engineering discipline and chief designer of the

helicopter beginning in 1958; the design was influenced by the American Sikorsky R-6.  The Y-2A project was canceled because of performance issues in 1960.

The model was powered by a Soviet airplane engine which was insufficient to effectively lift the aircraft.

 
 

Image coming soon!
Overview
Parent type
struct
EVENTNAME onRequest
EXCEPTION
struct
Cause
struct
Detail [empty string]
ErrNumber 0
Message Variable AIRCRAFTID is undefined.
StackTrace coldfusion.runtime.UndefinedVariableException: Variable AIRCRAFTID is undefined. at coldfusion.runtime.CfJspPage._get(CfJspPage.java:462) at coldfusion.runtime.CfJspPage._get(CfJspPage.java:417) at coldfusion.runtime.CfJspPage._get(CfJspPage.java:396) at coldfusion.runtime.CfJspPage._autoscalarize(CfJspPage.java:2371) at cfoverview2ecfm374882928.runPage(C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraftIncludes\overview.cfm:129) at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:257) at coldfusion.tagext.lang.IncludeTag.handlePageInvoke(IncludeTag.java:749) at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:578) at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:5274) at cfaircraft2ecfm1355239503._factor8(C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraft.cfm:401) at cfaircraft2ecfm1355239503.runPage(C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraft.cfm:1) at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:257) at coldfusion.tagext.lang.IncludeTag.handlePageInvoke(IncludeTag.java:749) at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:578) at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:5274) at cfApplication2ecfc496519613$funcONREQUEST.runFunction(C:\home\vertipedia-legacy.vtol.org\wwwroot\Application.cfc:47) at coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:662) at coldfusion.runtime.UDFMethod$ReturnTypeFilter.invoke(UDFMethod.java:592) at coldfusion.runtime.UDFMethod$ArgumentCollectionFilter.invoke(UDFMethod.java:555) at coldfusion.filter.FunctionAccessFilter.invoke(FunctionAccessFilter.java:95) at coldfusion.runtime.UDFMethod.runFilterChain(UDFMethod.java:471) at coldfusion.runtime.UDFMethod.runFilterChain(UDFMethod.java:445) at coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:317) at coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:975) at coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:696) at coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:503) at coldfusion.runtime.AppEventInvoker.invoke(AppEventInvoker.java:115) at coldfusion.runtime.AppEventInvoker.onRequest(AppEventInvoker.java:308) at coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:569) at coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter.java:43) at coldfusion.filter.MonitoringFilter.invoke(MonitoringFilter.java:40) at coldfusion.filter.PathFilter.invoke(PathFilter.java:162) at coldfusion.filter.IpFilter.invoke(IpFilter.java:45) at coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:97) at coldfusion.filter.ClientScopePersistenceFilter.invoke(ClientScopePersistenceFilter.java:28) at coldfusion.filter.BrowserFilter.invoke(BrowserFilter.java:38) at coldfusion.filter.NoCacheFilter.invoke(NoCacheFilter.java:60) at coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:38) at coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22) at coldfusion.filter.CachingFilter.invoke(CachingFilter.java:62) at coldfusion.CfmServlet.service(CfmServlet.java:231) at coldfusion.bootstrap.BootstrapServlet.service(BootstrapServlet.java:311) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:199) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144) at coldfusion.monitor.event.MonitoringServletFilter.doFilter(MonitoringServletFilter.java:46) at coldfusion.bootstrap.BootstrapFilter.doFilter(BootstrapFilter.java:47) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:168) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:448) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:936) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1791) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1190) at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63) at java.base/java.lang.Thread.run(Thread.java:834)
Suppressed
array[empty]
TagContext
array
1
struct
COLUMN 0
ID ??
LINE 129
RAW_TRACE at cfoverview2ecfm374882928.runPage(C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraftIncludes\overview.cfm:129)
TEMPLATE C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraftIncludes\overview.cfm
TYPE CFML
2
struct
COLUMN 0
ID CFINCLUDE
LINE 401
RAW_TRACE at cfaircraft2ecfm1355239503._factor8(C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraft.cfm:401)
TEMPLATE C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraft.cfm
TYPE CFML
3
struct
COLUMN 0
ID CF_AIRCRAFT
LINE 1
RAW_TRACE at cfaircraft2ecfm1355239503.runPage(C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraft.cfm:1)
TEMPLATE C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraft.cfm
TYPE CFML
4
struct
COLUMN 0
ID CFINCLUDE
LINE 47
RAW_TRACE at cfApplication2ecfc496519613$funcONREQUEST.runFunction(C:\home\vertipedia-legacy.vtol.org\wwwroot\Application.cfc:47)
TEMPLATE C:\home\vertipedia-legacy.vtol.org\wwwroot\Application.cfc
TYPE CFML
Type Expression
name AIRCRAFTID
Detail An exception occurred while invoking an event handler method from Application.cfc. The method name is: onRequest.
Message Event handler exception.
RootCause
struct
Detail [empty string]
ErrNumber 0
Message Variable AIRCRAFTID is undefined.
StackTrace coldfusion.runtime.UndefinedVariableException: Variable AIRCRAFTID is undefined. at coldfusion.runtime.CfJspPage._get(CfJspPage.java:462) at coldfusion.runtime.CfJspPage._get(CfJspPage.java:417) at coldfusion.runtime.CfJspPage._get(CfJspPage.java:396) at coldfusion.runtime.CfJspPage._autoscalarize(CfJspPage.java:2371) at cfoverview2ecfm374882928.runPage(C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraftIncludes\overview.cfm:129) at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:257) at coldfusion.tagext.lang.IncludeTag.handlePageInvoke(IncludeTag.java:749) at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:578) at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:5274) at cfaircraft2ecfm1355239503._factor8(C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraft.cfm:401) at cfaircraft2ecfm1355239503.runPage(C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraft.cfm:1) at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:257) at coldfusion.tagext.lang.IncludeTag.handlePageInvoke(IncludeTag.java:749) at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:578) at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:5274) at cfApplication2ecfc496519613$funcONREQUEST.runFunction(C:\home\vertipedia-legacy.vtol.org\wwwroot\Application.cfc:47) at coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:662) at coldfusion.runtime.UDFMethod$ReturnTypeFilter.invoke(UDFMethod.java:592) at coldfusion.runtime.UDFMethod$ArgumentCollectionFilter.invoke(UDFMethod.java:555) at coldfusion.filter.FunctionAccessFilter.invoke(FunctionAccessFilter.java:95) at coldfusion.runtime.UDFMethod.runFilterChain(UDFMethod.java:471) at coldfusion.runtime.UDFMethod.runFilterChain(UDFMethod.java:445) at coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:317) at coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:975) at coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:696) at coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:503) at coldfusion.runtime.AppEventInvoker.invoke(AppEventInvoker.java:115) at coldfusion.runtime.AppEventInvoker.onRequest(AppEventInvoker.java:308) at coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:569) at coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter.java:43) at coldfusion.filter.MonitoringFilter.invoke(MonitoringFilter.java:40) at coldfusion.filter.PathFilter.invoke(PathFilter.java:162) at coldfusion.filter.IpFilter.invoke(IpFilter.java:45) at coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:97) at coldfusion.filter.ClientScopePersistenceFilter.invoke(ClientScopePersistenceFilter.java:28) at coldfusion.filter.BrowserFilter.invoke(BrowserFilter.java:38) at coldfusion.filter.NoCacheFilter.invoke(NoCacheFilter.java:60) at coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:38) at coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22) at coldfusion.filter.CachingFilter.invoke(CachingFilter.java:62) at coldfusion.CfmServlet.service(CfmServlet.java:231) at coldfusion.bootstrap.BootstrapServlet.service(BootstrapServlet.java:311) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:199) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144) at coldfusion.monitor.event.MonitoringServletFilter.doFilter(MonitoringServletFilter.java:46) at coldfusion.bootstrap.BootstrapFilter.doFilter(BootstrapFilter.java:47) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:168) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:448) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:936) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1791) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1190) at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63) at java.base/java.lang.Thread.run(Thread.java:834)
Suppressed
array[empty]
TagContext
array
1
struct
COLUMN 0
ID ??
LINE 129
RAW_TRACE at cfoverview2ecfm374882928.runPage(C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraftIncludes\overview.cfm:129)
TEMPLATE C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraftIncludes\overview.cfm
TYPE CFML
2
struct
COLUMN 0
ID CFINCLUDE
LINE 401
RAW_TRACE at cfaircraft2ecfm1355239503._factor8(C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraft.cfm:401)
TEMPLATE C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraft.cfm
TYPE CFML
3
struct
COLUMN 0
ID CF_AIRCRAFT
LINE 1
RAW_TRACE at cfaircraft2ecfm1355239503.runPage(C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraft.cfm:1)
TEMPLATE C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraft.cfm
TYPE CFML
4
struct
COLUMN 0
ID CFINCLUDE
LINE 47
RAW_TRACE at cfApplication2ecfc496519613$funcONREQUEST.runFunction(C:\home\vertipedia-legacy.vtol.org\wwwroot\Application.cfc:47)
TEMPLATE C:\home\vertipedia-legacy.vtol.org\wwwroot\Application.cfc
TYPE CFML
Type Expression
name AIRCRAFTID
StackTrace coldfusion.runtime.EventHandlerException: Event handler exception. at coldfusion.runtime.AppEventInvoker.onRequest(AppEventInvoker.java:319) at coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:569) at coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter.java:43) at coldfusion.filter.MonitoringFilter.invoke(MonitoringFilter.java:40) at coldfusion.filter.PathFilter.invoke(PathFilter.java:162) at coldfusion.filter.IpFilter.invoke(IpFilter.java:45) at coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:97) at coldfusion.filter.ClientScopePersistenceFilter.invoke(ClientScopePersistenceFilter.java:28) at coldfusion.filter.BrowserFilter.invoke(BrowserFilter.java:38) at coldfusion.filter.NoCacheFilter.invoke(NoCacheFilter.java:60) at coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:38) at coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22) at coldfusion.filter.CachingFilter.invoke(CachingFilter.java:62) at coldfusion.CfmServlet.service(CfmServlet.java:231) at coldfusion.bootstrap.BootstrapServlet.service(BootstrapServlet.java:311) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:199) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144) at coldfusion.monitor.event.MonitoringServletFilter.doFilter(MonitoringServletFilter.java:46) at coldfusion.bootstrap.BootstrapFilter.doFilter(BootstrapFilter.java:47) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:168) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:448) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:936) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1791) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1190) at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63) at java.base/java.lang.Thread.run(Thread.java:834) Caused by: coldfusion.runtime.UndefinedVariableException: Variable AIRCRAFTID is undefined. at coldfusion.runtime.CfJspPage._get(CfJspPage.java:462) at coldfusion.runtime.CfJspPage._get(CfJspPage.java:417) at coldfusion.runtime.CfJspPage._get(CfJspPage.java:396) at coldfusion.runtime.CfJspPage._autoscalarize(CfJspPage.java:2371) at cfoverview2ecfm374882928.runPage(C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraftIncludes\overview.cfm:129) at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:257) at coldfusion.tagext.lang.IncludeTag.handlePageInvoke(IncludeTag.java:749) at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:578) at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:5274) at cfaircraft2ecfm1355239503._factor8(C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraft.cfm:401) at cfaircraft2ecfm1355239503.runPage(C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraft.cfm:1) at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:257) at coldfusion.tagext.lang.IncludeTag.handlePageInvoke(IncludeTag.java:749) at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:578) at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:5274) at cfApplication2ecfc496519613$funcONREQUEST.runFunction(C:\home\vertipedia-legacy.vtol.org\wwwroot\Application.cfc:47) at coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:662) at coldfusion.runtime.UDFMethod$ReturnTypeFilter.invoke(UDFMethod.java:592) at coldfusion.runtime.UDFMethod$ArgumentCollectionFilter.invoke(UDFMethod.java:555) at coldfusion.filter.FunctionAccessFilter.invoke(FunctionAccessFilter.java:95) at coldfusion.runtime.UDFMethod.runFilterChain(UDFMethod.java:471) at coldfusion.runtime.UDFMethod.runFilterChain(UDFMethod.java:445) at coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:317) at coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:975) at coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:696) at coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:503) at coldfusion.runtime.AppEventInvoker.invoke(AppEventInvoker.java:115) at coldfusion.runtime.AppEventInvoker.onRequest(AppEventInvoker.java:308) ... 36 more
Suppressed
array[empty]
TagContext
array
1
struct
COLUMN 0
ID ??
LINE 129
RAW_TRACE at cfoverview2ecfm374882928.runPage(C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraftIncludes\overview.cfm:129)
TEMPLATE C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraftIncludes\overview.cfm
TYPE CFML
2
struct
COLUMN 0
ID CFINCLUDE
LINE 401
RAW_TRACE at cfaircraft2ecfm1355239503._factor8(C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraft.cfm:401)
TEMPLATE C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraft.cfm
TYPE CFML
3
struct
COLUMN 0
ID CF_AIRCRAFT
LINE 1
RAW_TRACE at cfaircraft2ecfm1355239503.runPage(C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraft.cfm:1)
TEMPLATE C:\home\vertipedia-legacy.vtol.org\wwwroot\aircraft.cfm
TYPE CFML
4
struct
COLUMN 0
ID CFINCLUDE
LINE 47
RAW_TRACE at cfApplication2ecfc496519613$funcONREQUEST.runFunction(C:\home\vertipedia-legacy.vtol.org\wwwroot\Application.cfc:47)
TEMPLATE C:\home\vertipedia-legacy.vtol.org\wwwroot\Application.cfc
TYPE CFML
Type Expression
name onRequest