Quote:
"does an aerolid affect the downforce on the rear of the truck to sufficiently change the rake angle when at highway speed".
Its semi-rigid plastic construction should allow some side to side flexion in crosswinds- flattening on the windward side and bowing on the leeward (hopefully recapturing the airflow).
Where I get stuck is the 1º rake of the bed. Doing each individual piece with a added 1º front to back angle makes the thermoforming quite difficult and wasteful.
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Will these four pieces be compound-curved or flat?
How can 1% of difference affect the difficulty in manufacture?
An aerocap shouldn't produce up or down force. If it does it's not optimal for forward progress. Don't count on making the sides flappy to recapture air flow.