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Aviation History
1927
1927 - 0416.PDF
JUNE 9, 1927 -H-4--—t-H-H I I I A*« ft • . f% a . THE RYAN MONOPLANE, TYPE N.Y.P. : Curves of h.p. required versus airspeed for full load, half load, and light. 1-4 r Z -3 --5 ' i !i 1 i ! \ i > i j | ! j 1 ! ; . j ' ' : . ! ' ; ! ' Section and Polar Curve of Clark Y aerofoil at Reynolds number 3,610,000. From N.A.C.A. Report No. 233. and 67 m.p.h. at end, 4,110 miles. At practical speeds of 95 m.p.h. at start and 75 m.p.h. at end, 4,040 miles. FLIGHT TEST PERFORMANCES While the previous figures are estimated ones, the follow- ing figures are the result of actual fh'ing tests. The maximum speed, with 25 gallons of petrol and 5 gallons of oil, was 129 m.p.h. over the 3 km. course. With full load of 425 gallons of petrol and 25 gallons of oil the maximum speed was 124 m.p.h. approximately, based upr>n calculated performance. With 25 gallons of petrol and 4 gallons of oil the speed by airspeed indicator was 128 m.p.h., and with 201 gallons of petrol and 4 gallons of oil the speed was 127 m.p.h. by air- speed indicator. Take-off Distances.—In the table given below are set out the results of tests made at Camp Kearney, near San Diego, California, which is situated 600 ft. above sea level. The quantity of oil carried was 4 gallons. - - • - • • • • ' / w- _, r- i jw J/ f / + BGMJHR. \ 1 , / AH 9 10*3 / % 1 2-4 t-Z ?'O ft 1-6 1-4 12 10 •( MILES PER POUND PETROL - • - - - - - i 130 120 110 100 X 90* z a 70 60 50 40 1 -6 !jT- • • T 1 i ! t I f 1 1 1 • 1 1—; - 4 -i T -- -- -- -- 40 50 60 70 80 90 100 110 120 130 AIR SPEED IN M.P.H 22 20 19 18 »1 o N I N CL l0i »=> PETR ( r i - Lxft .10 V \ nan J 1 - I 7 1 c Z4I X\\ 4— z \ 0 - met;roi-K unr Pttntl on > L \ \ \—v— had 3// 25 24 11 Z0 1-8 1-6 1-4 12 10 -8 -6 -4 -2 MUES PER POUND PETROL - - - - - - - - - 2400 2800 3600 z 4000 ?I 0 4400 «0. sa» 6 THE RYAN MONOPLANE : On the left, miles per pound of petrol versus airspeed. In the centre, petrolconsumption versus airspeed, and on the right, miles per pound of petrol versus gross weight. 378
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