If Goldberg is delivering presents at an altitude of 5,813.6ft, with the same drag and weight of a 2019 Challenger SRT Hellcat Redeye, how much HP would he need to reach 400 mph? Pro Tips • 100% driveline efficiency • P (air density) at 5813.6 ft = .0019 slug/ft^3 • A (Area of Challenger front end) = 26.72 ft^2 • C(d) (Coefficient of drag) = .398 • Goldberg's sleigh required speed, 400 MPH = 587 ft/sec • F(drag) = 1/2 p X v^2 x C(d)A • P = F(drag) x V • Convert to Horsepower = PC 1HP/550 ft lbf/sec)

Question

Mike · Accepted Answer

Amazing what questions people can come up with !
I have a Challenger SRT.
I worked on this. Been out of school too long.
Intriguing question but I am not smart enough to figure it out.
Hoping some of the smarter people out there do this.

John Bendel · Answer

5,813 HP

pete · Answer

F(drag) = 0.5 x 0.0019 x sqr(587) x 0.398 x 26.72 = 3481 P = 3481.12 x 587 = 2043419 Hp = 2043419 / 550 = 3715

Mike · Answer

Thank guys. Last thing I need is more speed.