I mean aerodynamic as in least air resistance.
Let's say lowest drag for a given volume.Most aerodynamic given what constraint? Lowest drag for a given cross sectional area? Lowest drag for a given volume? In general, the shape will tend to be somewhat similar to a teardrop, but it will vary depending on your constraints.
It's not bad, though it would be better with a more complete boat tail (which it does not have because of the requirements of barrel launching as well as spin stability concerns).
Nose cone shape is of importance.
As usual wiki is a primer.
which gives the mathematical equations for several types.
Above graph shows the drag with 1 being favourable to 4 unfavourable versus speed.
Take a look at the graph in this wiki article:Some of these appear to flux, like a sine wave. Ie. at Mach 0.9 it has low drag, then at Mach 1 it has high drag, but at mach 1.1 it has low drag again. Is this the natural order of things.
Whoops. I can see why you'd draw that conclusion from the sample set I typed in my post. (The article talks about the effects of subsonic vs. supersonic.)Take a look at the graph in this wiki article:
Whoops. I can see why you'd draw that conclusion from the sample set I typed in my post. (The article talks about the effects of subsonic vs. supersonic.)
But if you look at the chart it seems to continue even after sonic boom...it goes 0.9 low then 1 high then 1.1 low then 1.25 high then 1.4 low and so forth.
The von Karman almost seem to be symetrrical, with drag highest at 1.5 and then low drag at 1.0 and 2.0. Which the possibilities in my mind makes this seem to be some kind of phase timbre effect, being analogous to sound theory, or the results in the chart are inaccurate.
What Im trying to say is Wikipedia provides a chart like this, implying a simple drag related to the sonic boom.
I'm saying its not so simple, I think its more analogous to this video below.
(can't find it just think of a crazy looking video with sine waves and eq frequencies and such.)
Welcome to the PF.known as the teardrop - it's the shape water forms when it runs down a window because it's been pushed into that position by the air flowing over it on the way down
USGS said:The common raindrop is actually shaped more like a hamburger bun
Welcome to the PF.
I think you may have made a typo here, and also have a misconception about raindrop shapes. When you said the teardrop shape is formed by airflow as the water runs down a window, there is no airflow when water is running down a window. I think you meant to say that the teardrop shape develops because of airflow when in freefall (like rain). However, that also turns out to be a popular misconception...