CS 22.479  Level landing condition

CAA ORS9 Decision No. 1

(a) For a level landing, the sailplane is assumed to be in the following attitudes: 

(1) For sailplanes with a tail skid and/or wheel, a normal level flight attitude. 

(2) For sailplanes with nose wheels, attitudes in which – 

(i) The nose and main wheels contact the ground simultaneously; and

(ii) The main wheels contact the ground and the nose wheel is just clear of the ground. 

(b) The main gear vertical load component P_VM must be determined to the conditions in CS 22.725. 

(c) The main gear vertical load component P_VM must be combined with a rearward acting horizontal component P_H so that the resultant load acts at an angle at 30° with the vertical. 

(d) For sailplanes with nose wheels the vertical load component P_VN on the nose wheel in the attitude of sub-paragraph (a)(2)(i) of this paragraph must be computed as follows and must be combined with a rearward acting horizontal component according to sub-paragraph (c) of this paragraph taking into account CS 22.725(a): 

where: 

m   =  mass of the sailplane (kg) 

g    =  acceleration of gravity (m/s²).