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Aviation History
1934
1934 - 1087.PDF
f? OCTOBER I8, 1934. FLIGHT. 1089 SET JOOOO 9OOO sooo TOOO 60OO 5.0OO 4.OO0 3.OOO zooo 1.000 BAGHDAD PERSIA ISFAHAN KANDAHAR DELHI DIFFICULT COUNTRY in the second stage of the speed race. ALLAHABAD which can clear the obstacle in that distance is considered to have a sufficient rate of climb, which is another way of saying a sufficient power reserve, to be fit for flying across many countries and in wide variations of climate. The possible source of trouble at controls, to which refer- ence has been made, may arise in cases where the maxi- mum loaded weight with which a given aeroplane will clear the obstacle in the take-off test is such that to stay below this weight the tanks cannot be filled quite full. In order to comply with the regulations, such a machine would start from Mildenhall with less than full tanks. When it arrived at Baghdad, or some other control, the pilot would want to fill his tanks completely in order to be sure of having enough petrol to get him to the next control. But if he were to fill his tanks quite full the aeroplane would be over the weight permitted by the take-off regulations, and would not therefore comply with the regulations of the race. In the official regulations published by the Royal Aero Club, it is laid down that in such cases the onus is on the competitor himself. His duty, as well as his interest, is to provide approved reliable means for checking quickly the contents of his tanks at the controls. Whatever these means are, they will be stamped or sealed before the start in order to let officials at the controls en route know that they have not been tampered with. If the means adopted are such that it takes the officials a long time to use them for ascertaining the conteuts of his tanks, Jbe will lose that much unnecessary time at the controls. The Great Circle distances between the controls are as follows: Mildenhall-Baghdad 2,530 miles; Baghdad- Allahabad 2,300 miles; Allahabad-Singapore 2,210 miles; Singapore-Darwin 2,084 miles; Darwin-Charieville 1,389 miles; and Charleville-Melbourne 787 miles. In the speed race the machines will carry, no pay load. That is to say, no points or similar awaTds are made for pay load, so that the fast machines will carry only their crews and sufficient petrol to cover the stages between controls. A different system has been adopted for the handicap race. In this, the speed at which the competing aeroplanes are handicapped is decided by a formula which takes into account: The gross weight of the machine (while conform- ing to I.C.A.N. requirements), the pay load, the wing area, and the horse-power of the engine(s). The formula is as follows: — o.2L\ /PU ••.•>'V=i 4o W Where V is the handicap speed in m.p.h., L the pay load in lb., W the gross weight of the aeroplane in lb., A the NOT INVITING; Mountains and hills like these, in Persia, will have to be crossed by competitors in thespeed race, mostly at night.
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