Aeroplane construction and operation; including notes on aeroplane design and aerodynamic calculation, materials, etc. A comprehensive illustrated manual of instruction for aeroplane constructors, aviators, aero-mechanics, flight officers and students. Adapted either for schools or home study (1918)
Rathbun, John B · Chicago : Stanton and Van Vliet Co. · leaf 126
tchanges in both direction and magnitude for differentpoints on the wing. In the front and upper portions thedrag is Negative, that is, instead of producing head re-sistance to motion it really acts with the propelling force.Hence on the upper and front portions the lift is ob-tained with no… … •BtR? Fig, 12. Effect of Incidence Changes on the Pressure Distribution of aThick Birds Wing. (After Eiffel) and give a positive drag for the total wing. The distribu-tion is shown by Fig 13 which gives the lift, drag andresultant forces at a number of different points on twocircular arc aerofoils…
Airplanes
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