Structural testing for static failure, flutter and other scary things

Ground test and flight test methods are described that may be used to highlight potential structural problems that occur on aircraft. Primary interest is focused on light-weight general aviation airplanes. The structural problems described include static strength failure, aileron reversal, static divergence, and flutter. An example of each of the problems is discussed to illustrate how the data acquired during the tests may be used to predict the occurrence of the structural problem. While some rules of thumb for the prediction of structural problems are given the report is not intended to be used explicitly as a structural analysis handbook

Experimental aeroelasticity history, status and future in brief

NASA conducts wind tunnel experiments to determine and understand the aeroelastic characteristics of new and advanced flight vehicles, including fixed-wing, rotary-wing and space-launch configurations. Review and assessments are made of the state-of-the-art in experimental aeroelasticity regarding available facilities, measurement techniques, and other means and devices useful in testing. In addition, some past experimental programs are described which assisted in the development of new technology, validated new analysis codes, or provided needed information for clearing flight envelopes of unwanted aeroelastic response. Finally, needs and requirements for advances and improvements in testing capabilities for future experimental research and development programs are described

A survey of homelessness and homeless services in West Dorset: A way forward

This report reviews the nature and extent of homelessness in West Dorset District Council (WDDC). In particular it focuses on: • exploring current levels of homelessness; • identifying the causes of homelessness within the local authority area; • gauging current service provision for homeless people/households; • identifying gaps in the provision of current services. In an attempt to reflect the local authority’s desire to develop a more proactive and preventative approach in addressing housing need, this report identifies a number of strategies that it may wish to adopt to ensure that this particular aspect of housing need is tackled effectively

A review of homelessness and homelessness services in Weymouth and Portland

This report reviews the nature and extent of homelessness in the Borough of Weymouth and Portland. In particular, it focuses on: Existing levels of homelessness; The causes of homelessness within the local authority area; Current service provision for homeless people/households; Identifying gaps in the provision of current services. Reflecting the local authority’s desire to develop a more pro-active and preventative approach to addressing housing need, this report identifies a number of strategies that it may wish to adopt in ensuring that this particular aspect of housing need is tackled effectively, with targeted resources aimed at preventing and addressing homelessness issues

Meeting report: Thunderstorms

Copyright @ 2007 Royal Meteorological Societ

X-ray variability of the quasar 3C273

Observations of the quasar 3C273 made during 1975-77 have shown that the X-ray flux varied on a time scale of several months. No similar variation was present in radio and optical data taken at similar times. If this variation results from luminosity variations of a central compact object, then an upper limit of ≤4 x 1017cm can be set on its dimensions

Responding to homelessness in North Dorset: A snapshot of current service provision and an estimate of service needs

This report reviews the nature and extent of homelessness in NorthDorset. In particular, it focuses on: - Existing levels of homelessness; - The causes of homelessness within the local authority area; - Current service provision for homeless people/households; - Identifying gaps in the provision of current services. Reflecting the local authority’s desire to develop a more pro-active and preventative approach to addressing housing need, this report identifies a number of strategies that it may wish to adopt in ensuring that this particular aspect of housing need is tackled effectively, with targeted resources aimed at preventing and addressing homelessness issues