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Air Cannon Impact Strength
The impact resistance of Plexiglas® sheet is affected by the hardness of the impacting object. This test is a measure of the velocity and energy required for a projectile of specified weight and tip radius, shot from an air cannon, to break a specimen. This highly practical test gives perhaps the best indication of the impact strength that can be expected of a part in service. Samples are 14" x 20", with edges tightly clamped.

Table 2: Air Cannon Impact Test Results for Plexiglas® Sheet

Plexiglas® Sheet Nominal Thickness

F50 (Ft-Lb) Energy To Break When Impacted With

in

mm

Baseball
(0.32#)

Steel-Tipped Dart
(0.6 lb 1/2" Rad. Tip)

.118
.236
.354
.472
.708
.944

3.0
6.0
9.0
12.0
18.0
24.0

24 (47 mph)
84 (84 mph)
113 (105 mph)
224 (147 mph)
390 (184 mph)
505 (220 mph)

5
16
27
40
53
68