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Aviation History
1928
1928 - 0241.PDF
'.-• 7 /- MARCH 29, 1928 BOULTON & PAUL STANDARDISED SPAR SECTIONS : Three types of webs and six types of flanges give acombination producing 18 distinct spars. By altering the gauge, and the material (even to the substitution of Duralumin for s teel), a very wide range is obtained. Boulton & Paul " Sidestrand I" (Concluded from p. 212.) Speed at 10,000 ft. (3,050 m.), 129 m.p.h. (207-7 kms./hour). Speed at 15,000 ft. (4,570 m.), 122 m.p.h. (196-5 kms./hour). Landing speed (engine off), 51 m.p.h. (82 kms./hour). Landing Speed (engine on), 47 m.p.h. (76 kms./hour). Climb to 10,000 ft. in 10-5 mins. Climb to 15,000 ft. in 19 mins. Service ceiling, 21,500 ft. (6,560 m.). Absolute ceiling, 23,000 ft. (7,000 m.). Full-throttle range at operational height, 750 miles (1,200 kms.). The actual range at economic speeds is, of course, considerably higher. Great Aerial FilmAt the Carlton Theatre, Haymarket, London, there is shown a wonderful film entitled " Wings." It depicts thecareer of American airmen during the war from the training stage to the realities of war in the air in France. The airfighting and bombing scenes are most thrilling, owing to photographic ingenuity, which gives the audience the illusionthat they are flying in the machines and engaged in the fighting. Sustained orchestral effects synchronising faultlesslywith crashes, bomb explosions and the spinning dives of defeated machines, add to the marvellous illusion. " Wings " Evening Quantities High-speed figure- = 16 Distance figure r? ^ = 3 • 5. I± /2kv =• 6-25.Altitude figure 7 ^ */ These values are unusually high for a twin-engined biplane,and appear to bear out the claims for high aerodynamic efficiency. For instance, if a propeller efficiency of 75 percent, is assumed at top speed, the " absolute " drag coefficient 0-75of the whole machine at top speed works out at—5^- = 0 • 023 a value well above the average for a machine of this type. <•> <$> is a film that will raise a new thrill in hardened cinema " fans."It is a masterpiece of its kind, and has aroused the approval of Col. Bishop, V.C., who brought down over 70 machinesduring the war. R.A.F. Sport THE R.A.F. cross-country championship was decided atHenlow Camp on March 21, when A/c F. W. Turner (Uxbridge), the Middlesex champion, retained the individual title, A/cR. H. Thomas (Henlow) was second. The senior team championship was won by Uxbridge. 213
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