Fig. 34 shows the diagram 
Longitudinal section 
showing the relation of —p 
pt 0 iL 
deformation and loading. Le) 3 e E 
d g 
S o 
As the measured point are = 
150 150 
shown in fig. 33, three points 
  
  
  
   
are represented as the inter- 100 100 
section of horizontal line No.9 59 50 
and logitudinal lines B, D and 
Y Z 
lem 
F. 
Fig. 34 Loading-Deformation Diagram Horizontal 
Section No. 9 
4. Accuracy of Measurement 
The following discusses the accuracy of orientation and observation. 
4.1 Accuracy of Measurement in Free-Rolling of Tires. 
The orientation work of the tire measurement is conducted by use of a ready- 
made-grid with an interval of 15 cm. The grid surface was used as the reference 
plane. As is shown in fig. 35, five pts. co-ordinates distributed over the plane, were 
measured by a plotting instrument and typed by the coordinate printer. 
The results of measurement are compared with the co-ordinates done by direct 
measurement. 
The table in Fig.35 shows the orientation error of the last finished condition. From 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
65 Ady Ne X y Zz 
A 0.253 0.163 0.508 
B 0.184 0.186 0.660 
/ C N C 0.208 0.241 0.820 
e D 0.105 0.202 0.580 
AE \ ) D, E 0.217 0.170 0.400 
ÁN y 
> D sed (in mm) 
Fig. 35 Orientation Error of Measurement in Free - Rolling 
of Tire 
- 35 -