Like the Falcon, the Fairlane had a unibody frame, but the body incorporated an unusual feature Ford dubbed torque boxes, four boxed structures in the lower body structure designed to absorb road shock by moving slightly in the vertical plane.
12.
However the insuperable problem was the proximity of the engine to the rear axle, and on 33 ft versions many different designs of drive-shaft were employed but no effective way was found of insulating the engine and gearbox from road shocks.
13.
However, the very thick sidewalls on run-flat tires transmit a much greater level of road shock to the handlebars, increasing rider fatigue; and also generated excess friction / heat which resulted in above average tire wear, prompting operating agencies to migrate to standard high-performance tires.
14.
One of the devices I've used is an iTrip ( the one whose frequency is set by sending it a series of audio tones . ) I found its performance ( against the competion from digital frequency synthesis ) to generate the carrier wave so it tended to drift in frequency as it warmed up, its battery discharged, and it was subject to road shock and vibration.
