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as far as aero drag, here are some areas to target. some aren't practical for a tow vehicle(ie. where thermal management of engine or brakes are concerned)
Major Aero Drag contributors, showing where we can make our improvments.
• 32% Wheels/wheelarches - can maybe do some thing here on truck and trailer
• 30% rear end / wake - included gap between TV and TT
• 12% underfloor
• 10% skin friction
• 7% front end
• 6% Enginebay / cooling
• 3% mirrors
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