The Aeronautical Journal: Volume 65 -

Lower Bounds for Sonic Bangs
L. B. Jones
Published online by Cambridge University Press:

04 July 2016, pp. 433-436
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Lower bounds for the intensity of the sonic bang of a slender aircraft configuration with various constraints are given in this note which is a condensed version of Ref. 1. Although these lower bounds cannot be achieved in practice the method of obtaining them demonstrates how low values can be obtained. Special emphasis is given to a possible supersonic transport.

The Aces.Frederick Oughton. Neville Spearman, London, 1961. 390 pp. Illustrated. 30s.
J. M. Bruce
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04 July 2016, pp. 845-846
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Leichtbau*.Heinrich Hertel. Springer-Verlag, Berlin, 1960. 526 pp. Illustrated. DM.67.50. In German.
G. V. Lachmann
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04 July 2016, pp. 65-66
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Flight Briefing for Pilots, Vol. I. A. H. Birch and A. E. Bramson. Pitman, London. 182 pp. 15s.
R. Searle
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04 July 2016, p. 771
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Ghost Ship of the Pole.Wilbur Cross. William Heinemann, London. 1960. 306 pp. Illustrated. 25s.
Ventry
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04 July 2016, p. 210
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Reconnaissance Orbits Normal to the Ecliptic Plane
S. W. Greenwood
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04 July 2016, pp. 436-437
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The ecliptic plane is the plane of the orbit of the Earth round the Sun. In a previous note the velocity requirements were examined for conventional rocket vehicles to enter reconnaissance orbits around the Sun in this plane.
Departure from the ecliptic plane obviously involves an increase in the velocity requirement. To some extent, all interplanetry voyages necessitate such motion, as the planets lie in planes inclined to the ecliptic. In this note, the extreme case of entry into orbits normal to the ecliptic will be considered.

The Aeronautical Journal