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So, how much horsepower would a Challenger SRT® Hellcat Redeye Widebody need to tow the SS...

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

Pro Tips
  • Davis Dam assumed grade = 7%
  • Air density is sea level conditions (.002377 slugs/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 is 40mpg (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)


Even, in 1921, the Dodge Brothers built a boat named 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 industry standard: Davis Dam Grade Climb?

Pro Tips
Davis Dam assumed grade = 7%
Air density is sea level conditions (.002377 slugs/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 is 40mpg (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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