June 1, 1919

June 1, 1919

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Development of the NC Seaplanes

Aircraft Transmitting Equipment, Type SE-1310

Course in Aerodynamics and Airplane Design

By Alexander Klemin7 min

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468469

Development of the NC Seaplanes

The history of the inception and development of the NC seaplanes, with additional information on some of their hitherto unknown constructional features and equipment, has been made public by the Navy Department and is printed herewith in part
476477

Aircraft Transmitting Equipment, Type SE-1310

This aircraft transmitting set was designed and built by the International Radio Telegraph Co. of New York to meet the urgent need of an airplane transmitter to cover greater ranges than those in use at present. It was designed especially for use on seaplanes of the HS type, but was first installed on the NC type of flying boats in the recent trans-Atlantic flight.
478479

Course in Aerodynamics and Airplane Design

Physical Data for the Atmosphere—Full flight testing may have one of two objects: first, the routine testing of a new airplane for speed at different altitudes, climb, stability and maneuverability; second, research testing for purposes of aerodynamical investigation.

By Alexander Klemin7 min

484485

Veneer Body Construction

Test of USXB-1 Bodies Widman USXB-1 Type—This body, built for a Bristol-type two-seater fighter, had longerons of solid gray elm, with laminated skin and bulkheads (Fig. 5). The outer plies in the bulkheads were alternately of elm and birch, while the core was of elm in some cases, and of poplar mahogany and birch in others.
474475

Naval Airship C-5 Makes 1100-Mile Flight

The United States naval airship C-5, Lieut.-Comdr. E. W. Coil, U. S. N., commander, made on May 14-15 a non-stop flight of 970 nautical miles (1115 Sta. miles), from Montauk naval air station to St. Johns, N. F., in 25 hr. 40 min. According to a statement issued by the Navy Department, the cruise was undertaken for the purpose of testing the practical radius of action of this class of airships, as well as their ability to operate under varying weather conditions; the outcome of this flight would determine the advisability of having the C-5 attempt to cross the Atlantic under her own power.
486487

Tailoring of Airship Envelopes

Considerable interest has developed both abroad and in this country in regard to the established American practice of "tailoring" non-rigid envelopes, which gives them certain advantages usually thought peculiar to rigid airships without spoiling the desired symmetrical shape.

By R. H. Upson5 min

466467

Editorials

THE brilliant success which attended the progress of the NC Seaplane Division 1 in its flight to the Azores, and which was marred only in part by the fog, is a lasting monument to the professional skill of our naval aviators as well as to the worth of American seaplane construction.
474475

NC-3 and NC-4 Reach Azores

The NC Seaplane Division 1, under command of Comdr. John H. Towers, U. S. N., started on its trans-Atlantic flight on May 16, at Trepassey, N. F. The division was at full strength, for the NC-4 (Commander Read), which had put in at Chathsun naval air station for engine repairs while bound for Newfoundland, had joined her sister ships in time for the start.
488489

Chart for Performance Computations

Wind tunnel experiments have given us very complete data on the lift and drag of a wing of given section and aspect ratio. These lift data must then be corrected for the particular design in order to allow for biplane interference, aspect ratio, wingend form, and model ratio.

By Richard I. Elliott3 min

474475

Hawker and Grieve

Harry G. Hawker and Lieut.-Comdr. Mackenzie Grieve, R. N., pilot and navigator, respectively, of the Sopwith biplane, entered for the Daily Mail trans-Atlantic flight competition, took off at 5.51 p. m., G. M. T., May 18, at Mount Pearl aerodrome, near St. Johns, N. F., in their attempt to reach Ireland in a non-stop flight of 1925 sea miles.
May 151919 June 151919