Which design feature of the R3 shell helps prevent poly liner movement due to torsion?

• A. 6 Anti-Rotational Tabs
• B. 8 Anti-Rotational Tabs
• C. 12 Anti-Rotational Tabs
• D. No Anti-Rotational Features

Answer: (C)

A key idea here is how to stop twisting forces from causing the poly liner to move inside the shell. Anti-rotational tabs act like small ribs that grab the liner and keep it from turning with the shell. The more tabs you have, the more points of contact there are to share the twisting load, so the liner is held steadier around the entire circumference. With twelve anti-rotational tabs, the engagement is more distributed and stronger against torsion, making movement of the liner much less likely than with fewer tabs or with none at all. Fewer tabs or no anti-rotational features offer less resistance to twist, so they’re more prone to allow the liner to shift under torsional stress.