- document
- Haasz, A.A. (author), Auciello, O. (author), Stangeby, P.C. (author) report 1986
- document
-
Ohman, L.H. (author), Brown, D. (author), Bowker, A.J. (author), Ellis, F.A. (author)Although the NAE 5 ft X 5 ft Blowdown Wind Tunnel was conceived in the 1950's, with commissioning in 1962/63, it has stood the test of time very well and is still, in 1985, in heavy demand. We may cite three main reasons for this situation: (i) the basic wind tunnel design was fundamentally very sound, (li) the wind tunnel circuit and its...report 1985
- document
- Hu, T.C.J. (author), Shirouzu, M. (author) report 1985
- document
- Shen, F. (author) report 1985
- document
-
Walker, D.M.C. (author)The orbit of 1970-47B passed very slowly through 14th-order resonance, and the changes in orbital inclination and eccentricity have been analysed over a four-year period, from January 1977 to January 1981, using 208 US Navy orbits. The analysis has yielded values for three pairs of lumped harmonic coefficients of 14th order, which have...report 1985
- document
-
Wickens, R.H. (author)This report presents aerodynamic data on an NACA 0018 airfoil oscillating in pitch in the N AE 2m X 3m Low Speed Tunnel. The purpose of the test was to simulate the dynamic aerodynamic behaviour of a Vertical Axis Wind Turbine blade section at the equatorial plane under the dynamic stall conditions which may occur at low ratios of tip speed to...report 1985
- document
-
Abbink, F.J. (author), Pijpers, E.W. (author)This report gives an overview of the development of the airliner structure, engines and systems, and the impact on the cockpit design. The influence of the developments of micro-electronics, digital computer technology and display technology on the avionics design and cockpit lay-out of the recently introduced airliners as the Airbus A-310 is...report 1985
- document
-
Labrujere, T.E. (author)A description is given of a method for the determination of global corrections for wall interference in both solid- and ventilated wall windtunnels, 2D as well as 3D. The method is based on the assumption that the flow velocity is known at a control surface surrounding the model and that the main part of the flow field may be considered...report 1984
- document
- Guimaraes Cavalcanti, S. (author) report 1984
- document
-
van der Linden, H.H. (author)In order to establish an inspection schedule for fatigue critical fastener holes in the wing lower skin of a fighter aircraft crack growth data under realistic loading was required. Experimental determination of these data was a logical choice since a representative specimen was available. However, the spectrum and load sequence, representative...report 1984
- document
-
Kilkenny, E.A. (author)Starting in 1946 as the College of Aeronautics, the Cranfield Institute of Technology was granted university status in 1969. In 1993 it changed its name to Cranfield University.report 1983
- document
-
Oskam, B. (author)The panel method approach is extended to obtain numerical solutions of the full potential equation for transonic flow. This extension is accomplished by adding a field distribution of source singularities to the conventional distribution of singularities over the boundaries of the field. The unknown source distribution in the field is determined...report 1983
- document
-
Hoeijmakers, H.W.M. (author)A review is presented of computational methods for the determination of the characteristics of vortical type flows occurring in aircraft aerodynamics. The review covers primarily computational methods for computing the downstream development of vortex wakes and methods for computing the characteristics of configurations with leading-edge and...report 1983
- document
- Reid, L.D. (author), Graf, W.O. (author), Billing, A.M. (author) report 1982
- document
-
Elsenaar, A. (author), Stanewsky, E. (author)A progress report is presented of a GARTEur Action Group on "Two-dimensional Transonic Testing Methods' As part of the action group activities measurements were made of the CAST-7/DOA1 airfoil in 7 European facilities, involving perforated, slotted and flexible wall wind tunnels. A comparison was made of the "best data available" for each tunnel...report 1982
- document
-
te Boekhorst, J. (author), Dissen, H. (author)In this Progress Report for the period June 1981-January 1982 an outline of the state of co-operation between NLR/LRT and DFVLR is presented. Again two classifications have been used for the different items in the co-operation: The first concerns the discipline that is involved: - Flight, - Fluid Dynamics, - Structures and Materials, - Space, -...report 1982
- document
-
Wanhill, R.J.H. (author), Jongebreur, A.A. (author), Morgan, E. (author), Moolhuijsen, E.J. (author)Flight simulation fatigue crack propagation tests on single and double element lugs made from 2024-T351 and TOT5-TT351 aluminium alloys and Ti-6AJ.-UV titanium alloy were carried out. Initial damage was a throughthickness notch at one side of each hole in one element. Results showed that crack propagation lives for double element lugs were much...report 1981
- document
-
Bosgra, J.A. (author), Reumers, J.J. (author)Noise measurements have been performed on two identical space-qualified gyroscopes of the floated rate-integrating type (Ferranti Type 125) in an analogue rebalance-loop configuration of selectable loop bandwidth, running under spacerepresentative conditions. The noise frequency range of interest was 0.005 to 50 Hz. The noise results have been...report 1981
- document
-
Beste, M.R. (author), Roefs, H.F.A. (author)As part of the investigation of a concatenated coding scheme consisting of a convolutional inner code and a Reed-Solomon outer code, various methods are evaluated for implementing the outer encoder and decoder. The Reed-Solomon code has length 256, dimension 22l , and is defined over an alphabet of 257 elements. Possible techniques that can be...report 1981
- document
-
King-Hele, D.G. (author), Walker, D.M.C. (author)Satellite orbits contracting under the influence of air drag experience 15th-order resonance when the track over the Earth repeats after 15 revolutions. If the orbital decay rate is slow enough, an orbit passing through the resonance is appreciably perturbed by the effects of 15th-order harmonies in the geopotential. We have used the observed...report 1981