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Aviation History
1914
1914 - 1221.PDF
DECEMBER 18, 1914. An r.o.g. single screw tractor by J. G Bilden, from two points of view. The Paddlngton Club and Research Work. Mr. D. Robertson (Dundee), writes as follows, with respect to the above :— " With regard to the letter of Mr. W. E. Evans, of the Padding- ton Club, m your issue of December 4th, and his proposed experi ments, I should think it already known that large diameter, small pitch propellers, were more efficient than small ones with large pitch. I experimented with propellers on one of my models about two months ago, with the following results. The dimensions of the model (and weights as far as I can remember) were as follows :—A frame 40 ins. Iong= 1^ oz>. ; main plane, 27 ins.by sins. = 13 drams. Elevator, 9 ins. by 2% ins. = 3 drams.; Rubber, 4 strands per side of I in. strip per side = about i£ ozs. Total, including stay wires, elevator attachment and propellers, nearly 5 ozs. Three pairs of propellers were tried : 9 in. Star carved Levasseur type ; 9 in. steamed (own make) usual type ; and 9$ in. steamed Twining pro pellers. The first two pairs were of 20 in. and 24 in. pitch respectively. The Twining pitch I don't know, but the tips were almost in line with each other. The two latter pairs were running about same speed, the Stars rather faster. The first two pairs were tried about six times without anything like a decent duration. Nothing above 60 sees. With the Twining propellers, at first attempt, with 1,100 turns (I could easily have got more), the model climbed steadily till slightly over 60 sees. At 65 sees, it disappeared into the topmost trees on top of a woodedhilloutside the park where we were experimenting. We could not find it, as the trees were in full foli age. I had had these Twining propellers for four years. About two years ago I had them on a model which weighed 6 ozs., 40 ins. long, 30 ins. span, 4 strands ± in. strip per side. The first flight landed it in the top branches of a very high tree, at 30 sees., when still climbing, but this model was not continued with for various reasons. The blades of these Twining propellers were only about i in. in width. " I would be obliged if you would inform me if the Twining Aeroplane Co. is still in existence, as I would like more of their propellers." [So far as I know it is not.—V. E. J.] " Mr. Evans mentions experimenting with planes to get a satis factory camber. Does not the fact that the N. P. L. find by model experiments that a camber of ^th chord at fth chord from leading edge is the best all round camber to satisfy model makers ? Large cambers are unsatisfactory." Aeromodellists Serving with the Colours. We shall be glad to receive the names and particulars of further model workers serving with the Colours. So far not a single name has been sent us from quite a number of clubs, including even the K. and M.A. A., which must have surely quite a number of members so engaged. . , Mr. Leslie G. Ryley writes: "Noticing your intimation in FLIGHT re the above, I shall be glad if you will include Private S. B. Shorter, 7th Battalion, R.W. Regiment, A Company, of the Coventry Aero Club, now billeted at Witham, Essex. Mr. W. H. Norton, Hon. Sec. Reigate, Redhill and District Aero Club, sends us the following communication : " A week or two ago you mentioned that you would like a list of aeromodellists who were serving with the Colours. I therefore beg to forward the following names of those connected with this club: — T W Burghope, sth Battalion (The Queen's). R.W. Surrey Regt. G. Mortis? Sth Battalion (The Queen's), R.W. Surrey Regiment. H Tordan, 5th Battalion (The Queen's), R.W. Surrey Regiment. C Jordan, 5th Battalion (The Queen's), R.W. Surrey Regiment." 1221 From Mr. P. W. Peel, Hon. Sec, South Western Aero Club we have received the following name* : — V. Drake, Royal Bucks Hussars. F. Miller, Royal Army Medical Corps. D. Prodger, Royal Naval Air Service. R. Rell, Royal Naval Air Service. C. Holmes, Westminster Dragoons. W. Turner, 6th London U.K.A. Mr. D. Robertson (Dundee) sends us the following list of aero- modellists (of, we presume, the Dundee Model Aem Club) now serving with the Colours :— Lieut. Ian M. Luis Royal Engineers. Private James McLaren, Royal Fusiliers. Private William Stuart, R.F.A. Query. W. G. Bettell, 1, Ventnor Terrace, Broad Lane, Tottenham, desires to know if there is a model club in Tottenham, If not, our correspindent would be very glad of a few hints a* to the best way to establish one. Reply to J. Chapman. A 2 ft. 6 ins. to 2 ft. 9 ins. propeller. It depends entirely on your speed and motor and the total weight of your machine. ® ® ® ® KITE AND MODEL AEROPLANE ASSOCIATION. Official Notieei. British Model Records. Single screw, hand launched Duration f Distance Twin screw, do. • I Duration Single screw.rise off ground I g^« - Tw.nsc~w.do gSS" Single-tractor screw, hand- / Distance ... ..(Duration ... J Distance launched Do., off-ground Single screw hydro., water Single-tractor, do., do. Twin screw, do., do. Engine driven off grass '"V Duration °^ Duration ... Duration ... Duration ... Duration J. E. Loueh K. l.uces T. D. Collingwood Chown W. E. Evans ... J. E. Louch L. II. Slatter 1. E. Louch C. C. Dutton J. K. Ixruch C.C.I 95 sacs. joo yards. 145 sacs. 900 yards M sacs. 365 yards, s mm*. 40 sacs. t66 yards 91 sacs. 190 yards. 04 sacs. Mutton J. E. Louch L. H. Slatter C. C. Dutton S. C. Hersom D. Stanger Official Notlces.—On Saturday last Mr. A. t. Houlliarg attandad at aaaacs. 65 sac*. Si sacs. the Bishop's Avenue Hying Ground, but owing to a breakdown on the trams, and no doubt also owing to the inclemency of the weather, none of the intending competitors turned up. 1 have received a letter from the Aero Models Associa tion pointing out the almost impossible circumstances of attempting any records at the present moment, and it has been agreed, as far as tbey are concerned, to postpone this matter for a month or two. All communications to be addressed to H. A. Lyche, »tt, Ksusl Htiwm tiriiue. I'.iici siirm. ft.W. AFFILIATED MODEL CLUBS DIARY. Club reports of chief work done will be published monthly for the future. Secretaries' reports, to be included, must reach the Editor on the hut Monday in each month. Leytonstone andDi strict AeC.( 14, LEYTONSTONE RD. ,STR ATFOR r>) Now that the wet season has set in members will meat in club-room, Sunday mornings, at an, Dames Road. UNAFFILIATED CLUBS. Liverpool Aero Research Club (62, CEDAR GROVE, LIVBRPOOLI. DEC. 25TH, postponed Trophy Competition at a 30 p.m. prompt j Dec, aSIb r.o.g., any type competition for cash prize. General meeting, 22, Eton Street, Dec. 30th, at 8 p.m.
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