Trailers with front steering axle

Center-axle trailers

We calculate the D factor

this is a theoretical tractive force indicator defining the hypothetical dynamic horizontal force between the towing vehicle and the trailer with a front steering axle (without vertical pressure on the hitch!)

We calculate the Dc coefficients

Dc - This is a theoretical tractive force indicator defining the hypothetical dynamic horizontal force between the towing vehicle and the center-axle trailer.

Dc = g ×
T × R
T + R
=  kN

Obliczamy współczynniki V

V - teoretyczna wartość odniesienia amplitudy siły pionowej oddziałującej na sprzęg, wytwarzanej przez przyczepę ze sztywnym dyszlem (wg. Regulamin ONZ nr 147)

V = 1.44 × 1.8
m
S²
× C
=  kN
Obliczamy dopuszczalna masa całkowita pojazdu w tonach
permissible gross trailer weight in tons sum of the maximum axle load transferred to the ground by the trailer in tonnes

g = acceleration of gravity: 9.81 m/s²
T = permissible gross vehicle weight in tonnes
R = permissible gross trailer weight in tonnes