Description: Straight edge for checking runway smoothness
Precision Straight Edges for Checking Airport Pavement Smoothness Rough Pavement is Hazardous to Aircraft The evolution of the straight edge for testing pavement has roots in highway construction where smoothness affects the ride quality. Cars have suspension systems that dampen road roughness. Aircraft suspension systems are not designed to absorb pavement roughness but to absorb the energy of landing impact. This means that most of the available strut stroke is already used up when the air
FAA Smoothness < 1/4 inch in 16 foot
USAF Smoothness < 1/8 inch in 12 foot