Japanese technology fund faces ministry criticism

Ministry of Technology

This is an experimental comparison Of two axi-symmetric, isentropic plug nozzles. In one of these (Model No. 1) the afterbody is cylindricaland a secondary flow is bled into the annular base. The other (Model No. 2) has a parabolic afterbody with no base or bleed. In both cases the expansion is all-external and the design pressure ratio is 14. These models were tested over a range of primary an...

Ministry of Technology

A piloted simulation study of the handling characteristics of the B.A.C. 221 aircraft in the approach configuration was made in preparation for the first flight of the aircraft. The simulation included a simpli~ed representation of the outside visual world, and cockpit motion in pitch and roll. Values of the aircraft's lateral derivatives and moments of inertia were varied to allow for uncertai...

Ministry of Technology

Temperatures and pressures have been measured in the shock-heated gas upstream of the nozzle of a reflected-shock hypersonic tunnel. Temperatures were measured by spectrum-line reversal, using sodium D lines for some measurements and the blue resonance lines of chromium for others. The temperature and pressure measurements immediately behind the first reflected-shock wave agreed well with theor...

Hellenic Republic Ministry for Development General Secretariat for Research & Technology

Ministry of Technology Aeronautical Research Council Reports and Memoranda

This Report describes investigations on spanwise non-uniformity in boundary-layer flow at low subsonic speeds over a range of experimental conditions, covering particularly the effect of varying number and open-air ratio of screens, type of honeycomb, flow contraction, surface curvature, and downstream position of measuring plane. Regions with laminar and turbulent boundary layers were investig...