urn:nasa:pds:context:facility:laboratory.qmu-wal 1.0 1.11.0.0 Product_Context 2019-02-20 1.0 Initial creation of the context product. urn:nasa:pds:context:instrument:qmu-wal.butterfield_wt facility_to_instrument 10.1002/esp.3290150307 Williams, J.J., G.R. Butterfield, and D.G. Clark, (1990), Aerodynamic entrainment thresholds and dislodgement rates on impervious and permeable beds, Earth Surface Processes and Landforms, 15, 255-264. Whitehead Aeronautical Laboratory, Queen Mary University of London, UK Laboratory Whitehead Aeronautical Laboratory contains a large number of wind tunnels for teaching, undergraduate projects, and research activities. A large variety of flow measurement and visulisation tools. Previoius to 1989, Queen Mary and Westfield College were separate parts of the University of London system. Colleges were merged in 1989 under Queen Mary University of London. Wind tunnels associated with G.R. Butterfield were associated with the departments of geography and aerospace engineering and are likely incorporated into the Whitehead Aeronautical Laboratory.