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Aviation History
1922
1922 - 0347.PDF
JUNE 15, 1922 location at a given speed factor for the aerofoils given. The C.P. location at high speeds is invariably well forward for thin "high-speed" aerofoils and well aft for thick "high- lift " aerofoils. It has been shown in a series of recent papers by some of the leading continental mathematicians that the centre of pressure for certain aerofoils may be calculated from the curvature of the mean camber. The methods are quite involved, and therefore useless from the view-point of the average engineer. It appears, however, that a practical substitute for the curvature of the mean camber is the " Angle of Trail," or angle between the chord of the aerofoil and the tangent to the curve of mean camber at the trailing edge, as shown in Fig. 2. The centre of pressure data for 117 aerofoils of the Gottingen series have been analysed in order to connect the C.P. movement with the angle of trail. The results are given in Fig. 3, in which the C.P. for three speeds, expressed in terms of the landing speed, are- plotted against the angle of trail,'&. It is obvious from an inspection of Fig. 3 that the greater the angle of trail the further aft will be the C.P. at a given speed factor. It should be noted that the C.P. movement increases with an increase in 3 to such an extent that the usefulness of aerofoils of this class may be limited to aero planes having a low speed range, i.e., ratio of maximum to minimum speeds. The assumption of 0.50 as the position of the centre of pressure at high speed is obviously without justification. FH London Gazette, June 6, 1922 General Duties Branch The following are granted short service commns., for three years on the active list, as Flying Officers, with effect from, and with senv. of, the dates indicated:—A. W. Crees ; May 24. R. M. Taylor, M.C. ; May 24.- F. B. Young ; May 26. The following Lieuts., Army, arc granted temp, commns. as Flying Officers, with effect frem, and with seny. of, the dates indicated, on seconding for four vears' duty with the R.A.F. :—F. W. G. Bedford, Black Watch ; March 7. G. Horsfield, R.F.A. ; April 9. H. P. Maltbv, R.G.A. ; J. H. Tanner, R.G.A. ; S. McD. Watson, R.G.A. ; May 3. E. F. Colam, Middx. Regt. ; May 22. Flying Officer J. H. Woodgett is placed on the retired list ; June 7. The following Pilot Officers resign their short service commns., June 7 :—L. B. J. Bumstead, M.C. ; A. E. L. Scott-Atkinson. Medical Service J. Prendergast, M.B., B.A., is granted a short service commn, as a Flying Officer (Hon. Flight Lieut.), with effect from, and seny. of, May 15. E. Huntley, M.B., B.S., is granted a temp, commn. as a Squadron Leader with effect from, and with seny. of, May 22. Capt. W. E. Hodgins, M.B., R.A.M.C., is granted a temp, commn. as a Flight Lieut., with effect from, and with seny. of, May 24, on seconding for three years' duty with the R.A.F. Nursing Service Miss C. M. Moore resigns her appt. as Sister ; June 8. Memorandum. Second Lieut. L. G. H. Aspinall to be Lieut. (Ad.) ; Oct. 20, 1018. (Since relinquished). Gazette of October 25, 1918, concerning Lieut. P. C. Hoyle is cancelled. ROYAL AIR FORCE INTELLIGENCE Appointments.—The following appointments in the R.A.F. are notified •— Win?, Commander Francis E. T. Hewlett, D.S.O., O.B.E., from Headquarters (Coastal Area) to R.A.F., Depdt (Inland Area) (Supernumerary). 26.5.22. Squadron Leaders.—A. B. Gaskell, D.S.C., from R.A.F. Base, Lenchars (Coastal Area) to Headquarters (Coastal Area). 1.6.22. J. C. P. Wood, from Half Pay List to R.A.F. DeDdt (Inland Area) (Supernumerary). 1.6.22. E. A. B. Rice, M.C., from No. 6 Squadron (Iraq) to R.A.F. Depdt (Inland Area) (Supernumerary Non-Effective). 21.4.22. R. Rivers-Smith, M.B.E., from Stores Depdt, Egypt (Middle East) to R.A.F. Depdt (Inland Area) (Super numerary Non-effective). 9.5.22. D. G. Donald. D.F.C., A.F.C., from R.A.F. Base, Leuchars (No. 3 Squadron) (Coastal Area) to command R.A.F. Base, Gosport (No. 3 Squadron) (Coastal Area). 1.6.22. F. H. W. Guard, C.M.G., D.S.O., from R.A.F. Depdt (Inland Area) to School of Technical Training (Men) (Inland Area). 22.5.22. Flight Lieutenants.—L. G. Le Blount Croke from Composite Flight, R.A.F. Base, Gosport (Coastal Area) to No. 3 Squadron, R.A.F. Base, Gosport (Coastal Area). 1.6.22. A. W. Symington, M.C., from No. 39 Squadron (Inland Area) to R.A.F. Depdt (Inland Area) (Supernumerary Non-effective). 3.4.22. J. A. MacNab, from R.A.F. Base, Leuchars (No. 3 Squadron) (CoastaT Area) to R.A.F. Base, Gosport (No. 3 Squadron) (Coastal Area). 1.6.22. C. Boumphrey, D.F.C., from R.A.F. Base, Leuchars (No. 3 Squadron) (Coastal Area) to R.A.F. Base, Gosport (No. 3 Squadron) (Coastal Area). 1.6.22. E. R. Openshaw, from R.A.F. Base, Leuchars (No. 3 Squadron) (Coastal Area) to R.A.F. Base, Gosport (No. 3 Squadron) (Coastal Area). 1.6.22. G. F. P. Warren, from No. 1 School of Technical Training (Boys) (Halton) to School of Technical Traiuning (Men) (Inland Area). 1.6.22. W. B. Higgins, from R.A.F. Depdt (Inland Area) to School of Technical Training (Men) (Inland Area). 22.5.22. E. C. W. Fitzherb°.rt, D.S.C., from R.A.F. Depdt, (Inland Area) to R.A.F. Base, Gosport (Coastal Area) (Supernumerary). 20.5.22. E. J. Cooper, D.S.C., from No. 230 Squadron (Coastal Area) to Marine and Armament Experimental Establishment (Coastal Area). 16.3.22. A. Hunter, O.B.E., from R.A.F. Depdt (Inland Area) to Marine and Armament Experimental Establishment (Coastal Area) 25.5.22. Trevor E. Salt, A.F.C., from No. 56 Squadron (Middle East) to No. 216 Squadron (Middle East) (Supernumerary). 18.4.22. C. Hanson- Abbott, from No. 230 Squadron (Coastal Area) to Marine-and Armament Experimental Establishment (Coastal Area). 4.5.22. W. H. Park, M.C., D.F.C., from Aircraft Depdt, Egypt (M.E. Area) to No. 8 Squadron (M.E. Area). 25.1.21. J. C. M. Hay, from Aeroplane Experimental Establishment (Coastal Area) to No. 2 Armoured Car Company (Middle Ea<7t). 11.4.22. EI H Aerial Route Weather Messages THE Air Ministry announces that on and after June 15 the forecasts of the meteorological changes anticipated in S.E. England which are included in the aerial route weather reports issued by wireless telegraphy from the Air Ministry at 08.35 G.M.T., 11.35 G.M.T., and 14.35 G.M.T., will, for brevity, be issued in code and not in plain language as hitherto. Details of the code are to be found in " Forecast Code for the Abbreviation of Weather Forecasts transmitted by Telegraphy or Radio-telegraphy " (M.O. 244), which may be obtained from H.M. Stationery Office, price is. net. For Aerial Gunnery Practice THE Air Council has applied to the Board of Trade for consent for aerial firing practices to be carried out off Leys- down by a\iation classes from the Royal Air Force Gunnery and Armament School at Eastchurch, which is situated between three and four miles from the proposed bombing Long Service and Good Conduct Medal THE Long Service and Good Conduct Medal has been awarded to the under-mentioned airmen :— No. 365 87631 166114 186074 147400 J85145 313624 I335I6 187852 313853 428 302885 Rank. S.M. 1 S.M. 1 S.M. 1 S.M. 1 S.M. 2 S.M. 2 S.M. 2 Flight-Sg Name. Edwards, A. Keen, R. S. Franklin, A. Hill, J. . . Whitley, H. Simmons, J. Bird, L. M. t. Barnes, E Flight-Sgt. Hunter, F Flight-Sg Sergeant Sergeant t. Parrv, T. Brown, G. Riches, H. L. . . W. . R. . C. . J- • With effect from 12.8.21. 3.12.21. 5.1.22. 1.2.22. 5.1.21. 7.5.21. 4.5.21. 1.3.22. 17.1.21. 3.4.21. 7.10.21. 16.2.22. Award of Certificates to Ex-Naval Ratings CERTIFICATES have been awarded to the under-mentioned airmen :— 314868 S.M. 2 Hughes, A. J. .. r.1.22. 237555 Flight-Sgt. Trowbridge, G. J. 4.1.22. 3X4937 Sergeant Devlin, J. .. 1.1.20. Move of No. 45 Squadron to Iratj No. 45 SQUADRON has moved from Almaza (Cairo) to Baghdad, and was transferred for all purposes from the Middle East Command to the Iraq Command, with effect from May 15, 1922. H H range. The practices are proposed to be carried out between certain hours daily during summer and winter. Paris-Marseilles- Paris DURING last week two notable flights from Paris to Marseilles and back were made by French pilots. Lieut. Carrie left Le Bourget at 4.55 a.m. on June 9, and arrived at the Istres aerodrome at 9.50. Leaving Istres again at 12.25 p.m., he landed at Le Bourget at 4.35 p.m., having taken 11 hrs. 40 mins. total time, but only 9 hrs. 5'mins. flying time. Lieut. Battelier left Le Bourget at 5.20 a.m. on the same day, and arrived at Istres (without landing) at 9.18 a.m. He left Istres again at the same time as Carri6 (12.25), but was forced, by trouble with his fuselage bracing, to land at Lyon. He got his bracing repaired, and resumed his flight from Lyon at 6.25 p.m., arriving at Le Bourget at 8.57 p.m. His flying time was only 7 hrs. 45 mins. By train the journey from Paris to Marseilles and back occupies 26 hours. 347 A
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