Question

How much horsepower would a vehicle need to arrive at a destination before the sound of its engine does given the following:

- The weight of the vehicle is estimated at 4451 lbs
- Assume no wind
- Assume no driveline losses
- A car traveling 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

How much horsepower would the Challenger Hellcat Redeye Widebody
need to run the speed of sound arrives before the sound of its
legendary engine arrives?
Pro Tips
Assume Stock Redeye Widebody curb weight
Assume no wind
Assume no driveline losses
Redeye traveling 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 +...

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?
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...

Our competitors have modes to make their cars quieter. 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?
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...

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...

How much horsepower would a vehicle need to tow the SS Delphine
up the industry standard: Davis Dam Grade Climb?
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...

How much horsepower would a car need to tow the a boat up the
industry standard: Davis Dam Grade Climb?
•grade = 7%•Air density (.002377 slugs/f^t3) •w(weight) 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)
+...

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...

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...

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...

Online trolls drive us crazy saying that our cars are big, heavy
and that they drive like boats. Well, our solution to everything is
more horsepower.
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...

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