FlightGlobal.com
Home
Premium
Archive
Video
Images
Forum
Atlas
Blogs
Jobs
Shop
RSS
Email Newsletters
You are in:
Home
Aviation History
1947
1947 - 0006.PDF
FLIGHT JANUARY 2ND, 1947 COARSENING PITCH Rising r.p.m. causethe fly-weights to lift the piston-valvepermitting oil to flow to the front ofthe piston so coarsening bladepitch. When the airscrewis "on speed" no oil flow takes placeand the blades are held in the obtain-ing pitch Falling r.p.m. allowfly-weights to lower piston - valve sofeeding oil to rear of piston to fine-offthe blade pitch. HIGH PRESSURE OIL TO FRONT OF PISTON HIGH PRESSURE OIL TO REAR OF PISTON DUPLEX AIRSCREWS airscrew oil tubes. Inside the racked sleeve a further coil spring is housed, the object of this being to ensure that the sleeve is kept in the position for normal cruising r.p.m. ' should the control from the cockpit be shot away or become inadvertently disconnected. The airscrew we have dealt with is not a feathering type, since this quality is not necessary with a single- engined aircraft. Feathering types are, however, very similar, the main difference being in the provision of a longer cylinder to accommodate the increased pitch range. Extra movement of the pilot's control into the feathering position moves the c.s.u. piston valve to the positive coarse- pitch position, and a separate, electrically-driven high- output pump feeds oil to the c.s.u. whence it is delivered to the airscrew to effect feathering movement of the blades. D.H. "OVER-TWENTY" PARTY •/ NINETEEN more people who have served the de HavillandEnterprise lor twenty years were initiated into the Over-Twenty Fellowship at its annual party at Hatfield on December 20th. The parent company formed by Sir Geoffreyde Havilland and the executive team of the old Aircraft Manu- facturing Co., Ltd., after the first Great War, is now twentyyears old. and 106 of its members have been admitted to this Fellowship since it was originated in 1940. It was considered that Major Frank Halford and those olhis staff who have been engaged lor twenty years on de Havilland work also qualified for membership as from 1926,the year in which he began the design of the first Gipsy engine. This year's gathering was made particularly cheerful,therefore, by the initiation of Major Frank Halford and Mr. John Brodie who has been at his right hand since an evenearlier date. Another director of the de Havilland Engine Company, whoior all his youth now completes twenty years of service, is flMi. Hugh Buckingham. The others initiated were: Mr. F. W.•\mos, Mr. L. T. Boreham, Mr. G. N. Cross, Miss E. D. Cramer, Mr. M. H Eagle. Mr. A. W. Hunt, Mr. H. J. Heading,Mi, H. R. Hooper, Mr. T. E. Johnson, Mr. W. F. King, Mr. H. ^eale, Mr. R. J. Nixon, Mr. R. I. Tugsley, Wing Cdr.C. ft. Pike. Mr. T E. Parnell, and Mr. T. Radford. "SAMOPOMOC LOTNIGZA" ^ INTRODUCING the Polish Air Force Association (Samopomoc-»- Lotnicza) at a gathering in the headquarters at 14, Colling- ham Gardens, S.W.5, Grp. Capt. W. Makowski, C.B.E., ex-plained the aims and objects of the Association. In brief the P.A.F.A. has been formed—on the lines of theRoyal Air Force Association—to prevent its members (now about 8,000) from becoming a liability to the community. A. 1registered war charity, the Association is entitled to accept f^ donations, but understanding is a more urgent requirement. FORTHCOMING EVENTS an. 3rd.—I.Mech.E. : " The Development of Aircraft Hydraulic Ma- chinery," H. G. Conway, S. M. Parker, and D. A. L. Robson. Jan. 4th.—R.Ae.S. Reading : Annual general meeting. Ian. 4th.—British Interplanetary Society : " The Energy and Stability of Atomic Nuclei," L. R. Shepherd. Ian. 6th.—R.Ae.S. Medway : "Design o< a Two-seater Sailplane," F. M. Reynolds. )an. 7th.—R.Ae.S. Belfast : " Gliding," Professor Hill. Ian. 7th.—R.Ae.S. Bristol : Brains Trust, with Capt. 1. Laurence Pritchard as Question-master, Ian. 8th.—R.Ae.S. Southampton : " Elementary Metallurgy ol Aircraft Materials," A. Black. Ian. 9th.—" Aerotech " Flying Club, No. I : "Naval Aviation," R. G. Worcester. Ian. 10th.—I.Mech.E. : "F2 Development and Shock Wave Investigation at Metro-Viclc." Dr. Smith and K. Todd. \
Sign up to
Flight Digital Magazine
Flight Print Magazine
Airline Business Magazine
E-newsletters
RSS
Events
