FLYING QUALITIES OF PILOTED AIRCRAFT - CAFE Foundation

MIL–STD–1797AAPPENDIX AFIGURE 248. Pilot rating boundaries for acceptable roll control in turbulence with |r o/po | 0.03 (from Princeton Univ Rpt 797).With an aileron stick or wheel crossfeed to the rudder pedals, Y , the rudder pedal deflection produced is∆δrp = Y CF δ as 1where δ as is the lateral stick (or wheel) deflection at the pilot’s grip. For the assumed ideal (zero sideslip)coordination, in terms of the β/δ as and β/δrp transfer functions:βββN δN as δ rp + Y δ = 0∆ CF ∆ as(2)At large bank angles and high roll rates the equations of motion become nonlinear, with possibilities thattrigonometric functions or higher–order terms will be of significant size. Nevertheless, the character of themotion generally will be shown by the linear analysis. N δβ as and N δβ rp are the numerators of the indicatedtransfer functions and ∆ the denominator, as in Aircraft Dynamics and Automatic Control. Therefore the idealcrossfeed is:YCF δ rpδ asβN δ asβN δ rp(3)556