. Report of the Electric Railway Test Commission to the president of the Louisiana Purchase Exposition . c Wedge Flat Standard . . Air Resistance in Lbs. per Sq. Ft. at Various Speeds IN Miles per Hour. 20 30 40 50 60 Remarks, Head PressureHead PressureHead PressureHead PressureRear SuctionRear SuctionRear SuctionRear Suction Note.— The above values are taken from the curves of Figs. 199, 200, 201, and power data correspond
. Report of the Electric Railway Test Commission to the president of the Louisiana Purchase Exposition . c Wedge Flat Standard . . Air Resistance in Lbs. per Sq. Ft. at Various Speeds IN Miles per Hour. 20 30 40 50 60 Remarks, Head PressureHead PressureHead PressureHead PressureRear SuctionRear SuctionRear SuctionRear Suction Note.— The above values are taken from the curves of Figs. 199, 200, 201, and power data corresponding to these conditions are given in Table LXXXV. Car Body results of all tests show an average speed of miles per hour and a total pres-sure of pounds. 534 AIR RESISTANCE TESTS 635 General Conditions of the Tests. The tests were conducted between Noblesville and Carmel,Indiana, upon the stretch of tangent track described in ChapterXIV, in connection with the car resistance tests. As the direc-tion of the car, with reference to the direction of the wind, is a Notlesville >E. Carmel Fig. 196. —Direction of Test Tracfi between Noblesville and Carmel, Indiana. matter of considerable importance in these tests, the directionof the track with reference to the four points of the compass,was accurately determined and is shown in Fig. 196. The datagiving the direction and velocity of the wind at 8 , 12 oclocknoon, and 4 , are shown in Table LXXIV. Table LXXIV. — Data Showing Direction and Velocity of Wind. For Air Resistance Tests. Hours Ending at . - Date. 8 12 M. 4. 8 12 M. 4 Wind Velocity. Wi? w Direction. Feb. 15 8 5 10 W. W. 16 13 18 18 s s. 17 13 22 20 w. w. 18 9 5 11 19 6 12 9 s. 20 6 7 6 s. 21 6 10 11 s. s. 22 8 8 6 w. 536 ELECTRIC RAILWAY TEST COMMISSION Table LXXIV. — Continued. Hours Ending at Date. 8 12 m. 4 8 12 M. 4 Wind Velocity. W
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