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Aviation History
1927
1927 - 0552.PDF
JULY 28, 1927 THE KING'S CUP AIR RACE And August Bank Holiday Meeting MAINLY on account of the fact that it is being flown in accordance with a new handicapping formula, the race for the King's Cup, organised by the Royal Aero Club and under the competition rules of the F.A.I., which takes place on Saturday next, July 30, at Hucknall Torkard aerodrome, near Nottingham, should be of considerable interest. The subject of handicapping by formula is ably dealt with by Mr. Mettam in this week's issue of THE AIRCRAFT ENGINEER, and the more technically minded among our readers wil* doubtless find much to interest them in that article. Here it will suffice to point out that from an examination of the speeds as worked out by the formula and the speeds of which certain of the machines entered are known to be capable, it would appear that the handicap formula under-estimates the speed of machines by something like 15 to 20 per cent. Naturally this does not hold good in all cases, but seems to be a fair 220 Gainsborough (Vasen LINCOLN 0 5 10 IS 20 25 . 30 LAP TIME IN.MINUTES 50 60 70 80 90 100 !!0 120 130 140 150 160 170 '180 190 ^j THE KING'S CUP RACE : Graph showing speed against lap time for the 180 miles' circuit. For the benefit of readers not familiar -with the use of graphs, it may be explained that the dotted lines show J an example : A machine is timed to have taken 97 minutes to cover the course. From the 97 minutes on the bot offl scale run a line up to the curve. From point where this line cuts the curve draw a horizontal line tc the left. This, in the example, is found to fall just below the 112 m.p.h. point, so that the speed is about Ml"7 m.p.h. The inset shows the two courses. The lower is flown first, then the upper, and then the lower ag in> ; 510
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