Volume 16 No 1 Feb 1965.pdf - Lakes Gliding Club

More documents

Recommendations

Info

V.RF. to my car with just a whip ofaerial on the roof was very good, seeingthat the radios we were using, eX-R.A.F.,had only cost £12 10s. each.Ahead I could see a very nice cloudstreet stretching some way on track,When I arrived at its near end I woundthe Ka-6 up and then set off underneathit at 150 km. per hr. on the clock, andnine minutes later the cloud street endedand I was still at the same height. Verynice; I could do with a few more ofthese. In the haze, in the distance, Icould just see Salisbury; all I neededwas three more thermals. The last onePERFORMANCE POLARSGlider Weigbt Col1llideratiOllsOR a really fair comparison betweenF glider types, it is best if the weightsof each are referred to some standard.The first idea that springs to mind is toadopt a standard pilot + parachuteweight of, say, 200 Ib.. and to add this tothe empty weight of each test glider.However, the empty glider weight mayvary widely within ·an actual type rangebecause of slight differences in man\!facture and because of such things as thevarying moisture content of woodenstructures. The standard performancepolar would thus be different for eachglider. We have therefore decided tostandardise on maximum A.U.W. whichis invariant unless drastic modificationsare made to a glider type.To correct a polar from a givenweight, W" to a new weight W" all thatis necessary is to multiply' the scales ofboth axes by the ratio .,lW, : ";W 2 •We have redrawn the Skylark 3F polargiven in the October issue to allow forour new reference weight. To providesome idea of the magnitude of changein performance of a glider with differentA.U.W.'s, we have plotted two Ka-6curves for a difference in weight of 56 lb.Po1:lrsThe polars published this month areas follows:K·6 CR SChleicher SegelflugteugbauSKYLARK. 3p Slingsby Sailplanes Ltd.SKYLARK. 4 Slingsby Sailplanes Ltd.OLYMPfA 460 . Elliotts of Newbury Ltd.The Ka-6 CR and the Skylark 3Fcurves are from the same source as last44I took up high, too high in fact, but itwas so nice to sit there and let the Ka-6go flat out for the last few miles and toknow that my Diamond was "in the bag"and that the first 500-km. flight in Rhodesiawas over. Time 4.45 p.m.On the ground again, started the longsad wait, listening on the radio as othersgradually got lower and lower and. finallylanding just short. Same old story-"justone more thermal".In Rhodesia the day is not very long;by 6 p.m. it is dark. The conditions haveto be good to fly a long task in such ashort day.time, namely, H. J. Merklein and H.zacher.The Skylark 4 measurements weremade by R. H. Johnson in the U.S.A.and are deemed reliable. The polar obtainsan "A" Category.The Olympia 460 polar, obtained fromG. R. Whitfield, was derived from asingle photographic comparison flightwith a Skylark :2 at three speeds. It thusonly obtains a "B" Category. The 460tested was the prototype with the bulbouswheel fairing and without the skid.We must apologise for last month'spolars not lining up with the centimetr-egraph paper. This was due to the inabilityof the blockmakers to scale~curately.K. H. DoETSCH, D. LAMPARo,Aeronautics Dept., Imperial Collel:e,Prince Consort Rd.• London, S.W.7.EOITORIAL <strong>No</strong>TE.-We will not be ableto publish any more of these polars forseveral months.NOTHING BUT THE BEST ....•• IS GOOD ENOUGH FOR YOU* REPAIRS * TEN YEAR INSPECTIONS* OVERHAULS * RE·SPRAYING. ETC.Carried out lit Reasonllble ChargesSouthdown Aero Services LtdLasham AIrfield, Alton, Hants.Telopho.o He
2-3~ en154.2'-'5-0 IDID6 0 en~c7 'fi)C8~.~9 'ElQ)1030 40I50I, • I B3 I 35·6min, sink : 1·39 kt. at 37·2 kt.max. glide L :29 at 43,2 kt.I Ka 6·CR I 45-1aircraft no.: 0·4390span : 15 m.wing area : 134 sq. ft.all.up wt. : 606 lb. I.662 Ib. 2.60 to ao 9'0.1 equivalent airspeed (knots)o"""le"'" l-------r I--jI
Page 1 and 2: SA LP A&GLIDIGFebruary - March 1965
Page 3 and 4: SAILPLANE& GLIDINGOFFICIAL ORGAN OF
Page 5 and 6: 1965 WORLD G,LIDINGCHAMPIONSHIPSHE
Page 7 and 8: FRED SLINGSBY'S RETIREMENTANY are t
Page 9 and 10: D-34(o)D·36Polyt 3Kria7
Page 11 and 12: dead into sun, and the haze made VI
Page 13 and 14: its normal position lies very near
Page 15 and 16: well that you should understand how
Page 17 and 18: TESTING A SOVIET DISCOPLANEBy V. IV
Page 19 and 20: cursed. The designer looked despond
Page 21 and 22: SECOND NEW ZEALAND CHAMPIONSHIPSHOO
Page 23 and 24: •Official rest day.three pilots a
Page 25 and 26: 1965 COURSES AT LASHAMHE 196'5 cour
Page 27 and 28: LEE WAVE uGEN" FOR AEROPLANE PILOTS
Page 29 and 30: of the Sheffield gale. The other is
Page 31 and 32: IT wasn't just having to get used t
Page 33 and 34: change, my man," I sa.id grandly, a
Page 35 and 36: outes. It's all a snare and a delus
Page 37 and 38: electrical horizons 'have complete
Page 39 and 40: Finally, the turn-and-slip indicato
Page 41 and 42: 1964 KRONFELD ART EXHIBITION AND196
Page 43 and 44: Loi61U ;nOrder Pi/or Points 1964 Or
Page 45: RHODESIA'S FIRST 500 KILOMETERSBy E
Page 49 and 50: JIy30-40506"0 70 8"0 9"0I I I I, eq
Page 51 and 52: BRITISH GLIDING ASSOCIATION NEWSCHI
Page 53 and 54: wings ar~ lewel. If you can do this
Page 55 and 56: T" T I G" I. 1.111 Y 11 74'0THEKRON
Page 57 and 58: as the squall struck us, about half
Page 59 and 60: about 3,000 feet, at which altitude
Page 61 and 62: TRUE FLIGHT-A FABLEBy M. BIRDOOKING
Page 63 and 64: iBOOK REVIEW•Great Flights and Ai
Page 65 and 66: will go on into the foreseeable fut
Page 67 and 68: I feel that the home-made winch wil
Page 69 and 70: FOR SALE (contd.)T.3IB, C. of A. fr
Page 71 and 72: BLACKPOOL AND FYLDEP"e.~enratioll o
Page 73 and 74: which we had from the Shaw Slingsby
Page 75 and 76: able piece ef Club equipment was bu
Page 77 and 78: And still he wasn't satisfied, this
Page 79 and 80: As usual, Lasham continues to opera
Page 81 and 82: to his usual standard. The surprise
Page 83 and 84: Margate before setting off in Sky.)
Page 85 and 86: CHEVIOTS (Acklington)SINCE our last
Page 87 and 88: a gliding record. He made his first
Page 89 and 90: The Boomerang.from a light-weight a
Page 91 and 92: The Club's order for a Ka-6 waschan
Page 93 and 94: Lindner, of Teek, with 2,434.2. - A
Page 95 and 96: A Gliding Holiday io Kentwith the K

Volume 16 No 1 Feb 1965.pdf - Lakes Gliding Club

Create successful ePaper yourself

Delete template?

Save as template?