gwatpe said:
The aerodynamic drag relation to speed has been quoted as a squared relation. It is actually a cubic relation. .
Actually it is a squared relation (various sites):
"In fluid dynamics, the drag equation is a formula used to calculate the force of drag experienced by an object due to movement through a fully enclosing fluid. The formula is accurate only under certain conditions: the objects must have a blunt form factor and the fluid must have a large enough Reynolds number to produce turbulence behind the object. The equation is
D = Cd * A * .5 * r * V^2
D is the drag force, which is by definition the force component in the direction of the flow velocity,[1]
r is the mass density of the fluid, [2]
V is the flow velocity relative to the object,
A is the reference area, and
Cd is the drag coefficient – a dimensionless coefficient related to the object's geometry and taking into account both skin friction and form drag. "