CS-VLA 443 Gust loads

• ED Decision 2003/18/RM found in: CS-VLA Amdt 1 - Very Light Aeroplanes (Mar 2009)

CS-VLA 443 Gust loads ED Decision 2003/18/RM (a) Vertical tail surfaces must be designed to withstand, in unaccelerated flight at speed VC, lateral gusts of the values prescribed for VC in [CS-VLA 333(c)](#_DxCrossRefBm584936674). (b) In the absence of a more rational analysis, the gust load must be computed as follows:  where - Lvt = vertical tail loads (daN); Kgt =  = gust alleviation factor; µgt =  = lateral mass ratio; Ude = derived gust velocities (m/s); ρ = air density (kg/m3); M = aeroplane mass (kg); Svt = area of vertical tail (m2); C̅t = mean geometric chord of vertical surface (m); avt = lift curve slope of vertical tail (per radian); K = radius of gyration in yaw (m); lt = distance from aeroplane c.g. to lift centre of vertical surface (m); g = acceleration due to gravity (m/s2); and V = aeroplane equivalent speed (m/s). (c) The average loading in figure B5 and the distribution in figure B8 of [Appendix B](#_DxCrossRefBm584936706) may be used.