What is the maximum permissible free play of an elevator full-span trim tab with a chord of 4.5 inches?

The maximum permissible free play for a full-span elevator trim tab with a chord of 4.5 inches is specified in the FAA regulations and is determined by a formula taking into account the size of the tab. For trim tabs with a chord of 4.5 inches, the regulation states that the maximum free play should not exceed 1/8 of the chord length, which is calculated as 0.045 inches (1/8 x 4.5 inches = 0.5625 inches, resulting in the maximum free play limit).

Thus, the value of 0.045 inches accurately represents the maximum allowable free play for this specific size of trim tab. Understanding the reasoning behind these limits is critical for maintaining safe operations and ensuring that control surfaces respond appropriately without excessive play that could affect aircraft handling. Other values provided do not align with the established regulatory limits for this type of trim tab, which is why they do not represent the correct answer.