Machines | Aerodynamic Drag - Explained
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What is aerodynamic drag? What makes a vehicle aerodynamic? How does drag affect cars? Drag is the resistive force a fluid places on something trying to pass through it. As your car drives through the air, the drag attempts to slow it down, and you must provide power to overcome this. As drag increases exponentially with speed, so does the amount of horsepower required to overcome said drag. Cars like the Tesla Model S and Toyota Prius have very low drag coefficients, allowing them to drive more efficiently at higher speeds. Explanation of P=Fv 1. Start with power, power is the rate of energy use. Power = Energy/Time. 2. Energy is required to accomplish work, which is defined as Force times Distance. Energy = Force*Distance. 3. Power = (Force*Distance)/Time 4. Power = Force*(Distance/Time) 5. Power = Force*Velocity (P=Fv) Please feel free to rate, comment, and subscribe! And don't forget to check out my Facebook page: http://www.facebook.com/engineeringexplained Also check out my official website: Make suggestions, participate in forums, learn through logically ordered lessons, read FAQs, and plan your future! http://www.howdoesacarwork.com Now on Twitter: http://www.twitter.com/jasonfenske13 NEW VIDEO EVERY WEDNESDAY!
Comments
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Congratulations on one million subscribers dude!
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Well I'm surprised that the Bugatti Veyron has such a high cd. The 2017 BMW 5 series has a drag coefficient of 0.22 and it's a family saloon, same for the f30 3 series. Do Bmw have better design engineers?
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I love u <3
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What is the minimum speed when the aerodynamics is applicable ??
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tesla model s has 0.23 (new model)
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You think maybe you could touch base on some common aerodynamics of modern vehicles? Things like the little flaps in front of the wheels. I've seen cars that have the flaps in front of the two front wheels, some only in front of the rear wheels, and very few having them at all corners. I've never seen on suv/trucks or anything with considerable approach clearance at the front, but I'd think the same parts could apply, especially with larger vehicles having more surface area of the tire exposed. Likewise, what about mudflaps and how much drag they create compared to going without, compared to having the flaps in front of the same wheels. Also, (I know, bear with me) newer vehicles have more of a flat front cap, whereas cars similar to my old 93 240sx have a cap that turns inwards closer to the ground. Sharknose specifically. It doesn't "look" aerodynamic, but Nissan advertised the car as having a cd of .31, wind-tunnel tested and all by the engineers of Nissan back in the day, which was surprising to me! I also notice a lot of mid-optioned cars and wagons come equipped with spoilers, which iirc basically elongate the "trailing pocket of air", which helps reduce drag. On the same note, some spoilers (mostly aftermarket) and nearly every wing have a gurney flap at the trailing edge to increase effectiveness. Comparing to exact spoilers, one straight and one with an effective gurney, would there be a negligable difference? Ah, another thing on spoilers I've noticed is that, generally, on higher-end cars sporting a high-rake spoiler, there's essentially a matching diffuser underneath. Most run of the mill cars have nearly a straight, parallel spoiler and a large sealed rear bumper cover. Anyways, just a couple things I've noticed and wondered a little about through the years lol. There's definitely more that I come up with, I'm sort of a backyard engineer. I just finished fabbing a fitting a front shroud for my radiator yesterday, attempting to see what the old "30% opening expanding into the full face of the exchanger" would do for the cooling system. Well, that and mainly to seal the inherent openings off. Waiting some hot summer weather now haha. I think I've rambled enough for now man, I love your channel, keep it up!!
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So put the veyron power plant in a prius
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So what you're saying is if I put a buggati veyron engine in a Prius I'll be hitting nearly 280-90 mph? joking but great video. From just three of your videos I already have learned so much about aero dynamics I wouldn't have known otherwise.
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What is the dodge rams Cd?
That big brick wall grill -
will you please show some work on how to calculate coefficient of drag. thermal fluid which i fond very difficult.
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why don't you show the calculation instead of equation. i mean live work.
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But cars still have a lot of drag in the first place, so you would either have to bump up the power, or make it more aerodynamic.
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So he's saying that vans have a lot of drag because it's not that aerodynamic. Super cars are aerodynamic, the air flows by the smooth surface of super cars, therefore making them have less drag and makes them faster.
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This guy technically gave the makers of Bugatti a better way to make their super car... For free. Fucking dope.
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Vw xl1
Cd=0.189 a=0.279 p=1.225
300mph needs roughly 77000watts which is around 100bhp
So 120bhp engine can get it up to over 300mph
This seems odd to me but the maths is right so plz correct me if I'm wrong -
Good explanation! I like how simple and direct it is! thanks!
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wait. Veyron has same Cd that Escalade does?
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i think all i learned from this is a tuned model s would be the fastest car? where does downforce grip and everything else come into play?
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Fdrag=1/2pv^2CdA , so v must be constant velocity relative to the wind? How about if we are accelerating what is the formula? I'm sure if drove a bugatti I would smash the pedal lol
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so pretty much to go 300mph, I need 1000hp and a Prius. okay.