CS-VLA 473 Ground load conditions and assumptions

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

CS-VLA 473 Ground load conditions and assumptions ED Decision 2003/18/RM (a) The ground load requirements of this subpart must be complied with at the design maximum weight. (b) The selected limit vertical inertia load factor at the centre of gravity of the aeroplane for the ground load conditions prescribed in this subpart may not be less than that which would be obtained when landing with a descent velocity (V), in metres per second, equal to 0.51 (Mg/S)¼ except that this velocity need not be more than 3.05 m/s and may not be less than 2.13 m/s. (c) Wing lift not exceeding two-thirds of the weight of the aeroplane may be assumed to exist throughout the landing impact and to act through the centre of gravity. The ground reaction load factor may be equal to the inertia load factor minus the ratio of the above assumed wing lift to the aeroplane weight. (d) If energy absorption tests are made to determine the limit load factor corresponding to the required limit descent velocities, these tests must be made under [CS-VLA 725](#_DxCrossRefBm584936723). (e) No inertia load factor used for design purposes may be less than 2.67, nor may the limit ground reaction load factor be less than 200 at design maximum weight, unless these lower values will not be exceeded in taxying at speeds up to take-off speed over terrain as rough as that expected in service.