Landgraf H-2

 

First helicopter of Landgraf Helicopter Corporation developed in 1944.  Bought by the USAF for testing in 1948; however, the aircraft crashed in the testing and the pilot was killed.  The project was halted following the incident.

For further details on the design and development history of the aircraft see,

Source: “Landgraf Helicopter Co. Model H-2 Lateral-Twin Helicopter”, Ken Bartie, VFS 2019 VTOL History Calendar

 
 

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