Question

• If we recreated the scene from Fast & Furious 7 and dropped a Challenger SRT® Hellcat Redeye Widebody from a C-130 aircraft at 5,280 ft, how much horsepower would it take to drive past it before it hits the ground if you’re 1 mile away?
• Rephrase the question: How much horsepower is needed to travel the distance of one mile, before the dropped vehicle hits the ground, from a mile up in the air, out of the back of a C-130 aircraft. The falling vehicle is falling STRAIGHT down, no forward travel The vehicle on the ground that has to pass the point of impact BEFORE impact, has to start from a dead stop.
• Use the following data to compute the required hp to caver the distance of 1 mile, from a dead stop, and pass the point of impact. Will have to calculate the time of fall, to find the time needed to start from a standing start to cover a mile just past the point of impact.

Data available:

• Air density @ sea level, 59 degrees, no wind = p = .002377 slugs/ft^3
• Coefficient of drag (flat plate, NASA) = C(d) = 1.28
• Weight = W = 4451 lbs
• Gravitation constant = g = 32.2 ft/sec^2
• Area = A = 197.5" long x 78.2" wide x (1 ft^2/ 144 in^2)
• Vehicle falls flat, wheels 1st, straight down, at constant acceleration with no aerodynamic drag until terminal velocity
• Horsepower needed to accelerate is AVERAGE - not peak
• 100% driveline efficiency

Answer 1