Roof splitter...better front end aerodynamics
Big beliver here of DIY aerodynamics. The "pocket" in-between your TRUCK cab and camper cab-over is a huge source of drag and wind noise. Its like towing a parachute. A roof "splitter" will low...
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Magnets give me concern as they are hard enough to scratch paint. Be sure to use a "slip sheet" under them. Also, magnets can distort metallic paint finishes.
Polyurethane foam (pool noodle) is a closed cell foam which is reasonably soft and flexible. Anything rubbing on paint long enough could eventually damage the paint. However today's clear coat auto finishes and camper baked-on finished aluminum or FRP gelcoats are far more durable than finishes were 30-40 years ago. If there is a concern, a simple "slip sheet" of 6 mil painters plastic poly between magnets and finishes should protect.
The intent is to not allow ANY air under or over the splitter. It all gets deflected to the sides. The beauty of the polyurethane foam is it will compress to form around any curves of the two surfaces. I would also put a few VGs on the TC vertical sidewall right behind where the splitter butts into the TC front vertical wall as the air transitions off the splitter.
There are many ways to fabricate a splitter. How you do it is not as important as trying anything to eliminate the drag bucket created by the TC mating to the pick-up truck.
Polyurethane foam (pool noodle) is a closed cell foam which is reasonably soft and flexible. Anything rubbing on paint long enough could eventually damage the paint. However today's clear coat auto finishes and camper baked-on finished aluminum or FRP gelcoats are far more durable than finishes were 30-40 years ago. If there is a concern, a simple "slip sheet" of 6 mil painters plastic poly between magnets and finishes should protect.
The intent is to not allow ANY air under or over the splitter. It all gets deflected to the sides. The beauty of the polyurethane foam is it will compress to form around any curves of the two surfaces. I would also put a few VGs on the TC vertical sidewall right behind where the splitter butts into the TC front vertical wall as the air transitions off the splitter.
There are many ways to fabricate a splitter. How you do it is not as important as trying anything to eliminate the drag bucket created by the TC mating to the pick-up truck.
