A11 Control surface loads

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

A11 Control surface loads ED Decision 2003/18/RM (a) *General*. Each control surface load must be determined using the criteria of sub-paragraph (b) of this paragraph and must lie within the simplified loadings of sub-paragraph (c) of this paragraph. (b) *Limit pilot forces*. In each control surface loading condition described in subparagraphs (c) to (e) of this paragraph, the airloads on the movable surfaces and the corresponding deflections need not exceed those which could be obtained in flight by employing the maximum limit pilot forces specified in the table in [CS-VLA 397(b)](#_DxCrossRefBm584936696). If the surface loads are limited by these maximum limit pilot forces, the tabs must either be considered to be deflected to their maximum travel in the direction which would assist the pilot or the deflection must correspond to the maximum degree of ‘out of trim’ expected at the speed for the condition under consideration. The tab load, however, need not exceed the value specified in Table 2 of this Appendix. (c) *Surface loading conditions*. Each surface loading condition must be investigated as follows: (1) Simplified limit surface loadings and distributions for the horizontal tail, vertical tail, aileron, wing flaps, and trim tabs are specified in Table 2 and figures A4 and A5 of this Appendix. If more than one distribution is given, each distribution must be investigated. Figure A4 is limited to use with vertical tails with aspect ratios less than 2.5 and horizontal tails with aspect ratios less than 5 and tail volumes greater than 0.4. (d) *Outboard fins*. Outboard fins must meet the requirements of [CS-VLA 445](#_DxCrossRefBm584936688). (e) *T- and V-tails*. T- and V-tails must meet the requirements of [CS-VLA 427](#_DxCrossRefBm584936709). (f) *Special devices*. Special devices must meet the requirements of [CS-VLA 459](#_DxCrossRefBm584936664).