Deflections 0°000075 inch. 
45° 
5 
Heth 
33°75 22°5 
11°25 
Position on Rim. 
A. BOYD. 
Arm, 
78°75 
67'S 
56 25 45° 
Fig. 24—Four Armed Wheel, jointed midway between the arms. Curves 
shewing Deformations of Rim for a distance of 45° on each side of arms AD 
and CB; also for bays C and B when wheel is loaded. 
No. 1, Bays A and D, Curve of Deformation at 14 revolutions per second. 
33 
: 
Pere ot 
v7 
“ 
J J 
“ 
— 
HOD MDIMAE 
“ 
93 
93 
Bays C and B; 
3? 
3) 
12 
10 
33 
be) 
(loaded). 
(loaded . 
other side of the jointed arm AB, viz. B 11°25° and B 22°5° 
were also tried and gave similar results. 
The unjointed 
arm AD also gave an unexpected inflection at higher speeds. 
This must be due to the fact that this arm was slightly 
bent out of the plane of the wheel, and on straightening, 
4 
’ 
