By Dana Bell
Air strength shades vol.1 1926-1942 КНИГИ ;ВОЕННАЯ ИСТОРИЯ the united states military Air Corps' markings and camouflage. Bombers, combatants, transports, and running shoes. in accordance with rules, normal orders, technical orders, and requirements of the interval, and photographic proof. a few finishes have been to extend visibility, and others to diminish it. Black and white photos and colour illustrations.Издательство: Squadron/Signal publicationsСерия: Squadron 6024Язык: английскийКоличество страниц: 96Формат: pdfРазмер: 42.10 Мб часть 1 часть 2 eighty five
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Additional info for Air Force Colors vol.1 1926-1942
1 aF" 1 aF". 8=Sq aa Sq a8 Sq a8 Sq (1-46) where F" is an applied aerodynamic force of unspecified origin to be explainedGin Section 1-7. pU 2 , the dynamic pressure in lb/sqft, and p is the air density: Substitut- t 22 LONGITUDINAL DYNAMICS ing for iJFx/iJ8 from Eq. 1-40 and multiplying and dividing the fourth and sixth terms by c /2U, where c is the mean aerodynamic chord (see Appendix D), Eq. 1-46 becomes mU,u Sq _!!... iJFx,u _ ~ iJFx'a _ ~ (~) (2U) iJFx'li Sq iJu mg + Sq Sq iJa 2U Sq c iJli c ( 1 ) ( 2U ) iJFx.
If it is necessary to study the effect of the operation of the gear, flaps, or other force or moment producing devices, this can best be done by simulation on an analog computer. In Section 1-8 a particular aircraft is studied, and the equations of motions solved. 1-8 SOLUTION OF THE LONGITUDINAL EQUATIONS (STICK FIXED) In solving the equations of motion it is first necessary to obtain the transient solution, which is obtained from the homogeneous equations, that is, with no external inputs: Cm = CF = CF = O.
Thus ex. and ex are usually negligible and are neglected in the following pages~ The de;ivation of the equations for the rest of the stability derivatives follows. ex is the change in the force in the X direction due to a change in the forward velocity. The force in the X direction, when the aircraft is in equilibrium flight with Wo = 0, depends on the thrust and the drag. The thrust vector may not be aligned with the velocity vector of the aircraft, but the angle between these two vectors normally is small.