Page 309 - Aeronautical Engineer Data Book

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Tailplane lift due to downwash lag effect Mach dependent, small at low speed Pitch stiffness, dependent on static margin Pitch damping, due mainly to tailplane Pitch damping, due to dow

Tailplane lift effect (added mass effect) tailplane

d d
d d l T = c
= Z q � Z q d � M q d

d d = – K n = c l T = c
� r 1 – V – V r 1 � C m ∂ V 0 V ∂ C d m d – V T l T � –V T 1 �

Normal force due to pitch rate Normal force due to downwash lag Pitching moment due to velocity Pitching moment due to ‘incidence’ Pitching moment due to pitch rate Pitching moment due t

Z q Z w ˚ M u M w M q M w ˚