34° TURNING AND BACKING CH. XIV 



With a coach locking at an angle of 20 degrees 

 and having a perch 6 ft. 6 in. long, a turn can be 

 made in a street which measures 44 feet in width 

 without the outside leader touching the kerb ; if 

 the leaders are pulled well to the inside of the 

 turn before reaching the kerb, it may be done in 

 a few inches less. 



Fig. A, Plate XXVIII., * shows the tracks of the 

 wheels and the position of the horses' feet in such a 

 turn. The dotted lines are the tracks of the front 

 wheels and the full lines those of the hind wheels ; 

 the round foot-prints those of the fore-feet and the 

 longer ones those of the hind-feet. 



If there were no leaders, the space required would 

 be only a few inches less. 



To turn in a road of less width than 44 feet, 

 backing must be resorted to, and the narrowest 

 street in which a turn can be made with a coach 

 that locks at the usual angle, 20 degrees, is 24 feet 

 between the kerbs. 



The manoeuvre must be executed as follows : — 



The coach should be brought into a position 

 about 16 feet from the off side kerb and parallel 



* The diameter of the circle in which a coach will turn may be 

 thus found. In Fig. A, the lines of the front and hind axles, when 

 on the lock, meet in the centre of the circle, the perch is the sine of 

 the angle of lock, and the distance from the perch-bolt to the centre 

 is the radius, to which half the length of the axle must be added to 

 get the radius of the circle of the outside front wheel. The angle 

 of lock is the same as the angle at the centre. 



