- #1
Dieseltwitch
- 12
- 0
Ok so i have looked and looked for a simple way to under stand how to find drag using the coefficient of drag.
the formula i found is off of NASA website and it reads
Drag = Coefficient * [ (Density * Velocity ^2)* .5 ] * reference area
here is my question
what units do i use.
When i set it up with these numbers
CD = 0.31 (unitless i know)
Ref Area = 8 sq ft (ruff guess)
Velocity = 75 fps
density = 24 in Hg
I end up with 167,400. but i know no clue as to what unit that is? should i be putting every thing in with different units... what is the end units?
the formula i found is off of NASA website and it reads
Drag = Coefficient * [ (Density * Velocity ^2)* .5 ] * reference area
here is my question
what units do i use.
When i set it up with these numbers
CD = 0.31 (unitless i know)
Ref Area = 8 sq ft (ruff guess)
Velocity = 75 fps
density = 24 in Hg
I end up with 167,400. but i know no clue as to what unit that is? should i be putting every thing in with different units... what is the end units?