Some preliminary results that have been obtained in the frame of the SANGER system studies are presented. SANGER is a West German study project and technology reference system for a future advanced space transportation system. The first stage of this vehicle is a hypersonic aircraft from which a passenger version could be derived. The analyses indicate that a speed of Mach 4.4 will lead to maximum seat mileage per day as well as to minimum propellant consumption. The speed-related cruise altitude of 24500 m or 80000 ft is above the most sensitive ozone layer and high enough to produce only one-third of the noise ground pressure which is considered as the acceptable limit (1 lb/ft2) over populated areas. The aircraft surface temperatures at these conditions can still be managed by a conventional titanium alloy structure with special provisions only at the leading edge and the engine inlets. The potential route structure and economics of such an aircraft are discussed.
On the optimum cruise speed of a hypersonic aircraft
Ueber die optimale Reisegeschwindigkeit von Hyperschallflugzeugen
IEEE Aerospace and Electronics Systems Magazine ; 4 , 5 ; 13-16
1989
4 Seiten
Aufsatz (Zeitschrift)
Englisch
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