![]() ![]() And the other type you'll see are the opposite: vents poked out into the airflow- in this case though, they will almost always either be at the leading edge of the hood/roof/etc. You'll notice two types of vents: so-called "NACA-style" vents, like the side vents on the old Ferrari F-40 which are kind of tear-dropped shape and go inward- these are not very effective, however they are very efficient (meaning they are low-drag) so for things like bringing air into a cabin, they are just about ideal. or else a very large duct which allows some clean air in.Īs for vents near the body (whether mounted on the hood, sides, roof or bonnet), again, look at racecars and other vehicles untouched by the hands of the marketing idiots. style duct with a long neck to get it out of the dirty air and to allow air to pass beneath it without excess compression. ![]() So, the most effective intake would be an E.T. The problem is you create a cushion of air beneath the duct which gets compressed and causes drag if there isn't enough space for the air to go. It's why high-wing aircraft land shorter than low wing aircraft. That is the minimum height above a lower plane to ensure good clean air into the engine compartment. Take the chord of a plane (wing), multiply by 1.5. What you do see are intakes that are created based upon the following formula (roughly descibed because I don't have the exact formula handy) But if you take a look at the rear/mid-engined LeMans cars, for example, you won't see intakes just above the roof (unless they are for inducting cool air into the cabin). ![]() Click to expand.Well, take a look at vehicles, of any type, that are designed for function without regard for appearance or marketing considerations and show me a similar scoop on any vehicle, whether train, boat, car, airplane, helicopter, covered wagon, or rickshaw which is designed for speeds below 200mph. ![]()
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