Question

Our competitors have modes to make their cars quieter... which is embarrassing. Our answer to that would be to make a car faster than the speed of sound.

How much horsepower would the Challenger Hellcat Redeye Widebody need to run the speed of sound arrive before the sound of its legendary engine arrives?

In other words, how much horsepower would the 2019 Challenger SRT Hellcat Redeye need to get somewhere before the sound of its engine does?

Pro Tips

• Assume Stock Redeye Widebody curb weight
• Assume no wind
• Assume no driveline losses
• Redeye travelling at the speed of sound (760 MPH --> 1116.4ft/sec)

What you need to know:

• HP = Fsum x V/hp
• F drag = 1/2 pv^2 CdA
• F rolling resistance = Crr x Weight
• F sum = F drag + F rolling resistance
• Cd = .398
• A = 26.72 Ft^2
• Crr = .015
• p= .002377 slugs/ft^3

Answer 1