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Even, in 1921, the Dodge Brothers built a boat named the SS Delphine and it had...

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Physics

Even, in 1921, the Dodge Brothers built a boatnamed the SS Delphine and it had a whopping 3000 HP. 

So, how much horsepower would a Challenger SRT®Hellcat Redeye Widebody need to tow the SS Delphine up the industrystandard: Davis Dam Grade Climb?


Pro Tips

Davis Dam assumed grade = 7%


Air density is sea level conditions (.002377slugs/f^t3)


w(weight) of the SS Delphine + trailer + Redeye =3,922,000 + 150,000 + 4451 Lbs


Crr = coefficient of rolling resistance =.015


Assume Combined CDA is 1555 ft^2


SAE J2807 (Davis Dam Grande Climb) - min speed is40mpg (59 ft/s)


F(drag) = 1/2p x V^2 x C(d)A


F(rolling resistance) = W x cos x Crr


F(weight) = W x sin


F(sum) = F(drag) + F(rr) + F(weight)


P = F(sum)XV


convert to horsepower = P(1hp/550ft lbf/sec)


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