RPM VS Velocity

The exact size and position of the sprue will make a big difference on how and how much air impacts it because the ball is a sphere....
Over time I think the sprue will migrate into the burble. but not before it hits the target..
It has to fight so many forces.
Inertia put it on a fixed path that must be overcome...
The highest and lowest points of pressure are directly opposite of each other...this wants to keep the ball stationary along it axis..
the next highest point of pressure is likely opposite of the sprue.

If you closely examine the air currents moving over the ball you can see the place where the ball sprue would be least affected..


HOWEVER!..... we are leaving out one very important factor.....Supersonic flight :hmm:

Here's a ball at supersonic speed.....notice the difference in the pressure wave...

If we think of the sprue as a control surface....
Then as velocity approaches and exceeds the speed of sound, we now that control surfaces become less effective....

This might explain why guys shooting smoothbores with stout loads( = more velocity) report better accuracy... Both the adverse affects of a control surface and the flight time are reduced, :hmm:

Pretty far fetched, IMHO.

For years I've wondered and heard other people wonder and discuss why that sprue sticking out there in front doesn't cause problems with accuracy. It is not logical that it doesn't. It finally dawned on me that the reason was that it's not sticking out there. It rotates around to the back, and the smooth, round part of the ball takes the lead.

Show me a video of your badminton shuttlecock traveling feathers first all the way to the target and then we'll talk more. :haha:

Spence

Wow, Spence,, :shocked2:

Does :shocked2: mean you saw the light, John? :haha:

Spence

Pretty far fetched, IMHO.

Click to expand...

How so?

I don't necessarily disagree with what you originally said just exploring the possibilities.

I don't think a shuttlecock is a good analogy....
The cone on a shuttlecock is symmetrical and at least twice the diameter of the ball.



I don't see the comparison. unless you leave all of the casting intact.

let's see if we can design a simple test....
What say you?

a bullet, any bullet, falling back to earth from a mile or more in altitude is in fact, very deadly.

Click to expand...

Not necessarily from as much as a mile.
My son, on his very first night unsupervised as a young medical resident in New Orleans on New Year's night got a patient from just such an event. She was a young girl who had a bullet enter the top of her skull. Needless to say, but she died. It is (hopefully 'was') a tradition in New Orleans to fire guns into the air at midnight on New Years. The next day he put in for time off for the following year. That next year he took his leave in another state just so he could not be called back to duty. And, this post, like so many others on this thread, has nothing at all to do with traditional muzzle loading. :surrender:

Rifleman1776 said:

And, this post, like so many others on this thread, has nothing at all to do with traditional muzzle loading. :surrender:

Click to expand...

By traditional muzzle loading, do you mean like doing it with a delrin ramrod?

Spence

The wind will act on the sprue just as it does on the shuttlecock feathers, blow it around to the back.

Spence

Are we still thinking about this, or have we reached an impasse....
I won't let the misologists derail the discussion.

I agree that is possible but I'm not sure it would happen within 25 or 50 yards....
Not sure it would have time to overcome the initial inertia,

I thought about testing it but then realized that my smoothbore molds are all Lee molds and have negative sprues....

colorado clyde said:

Are we still thinking about this, or have we reached an impasse....

Click to expand...

I've already said more about this than I know, nothing more to add. :grin:

Spence

George said:

Rifleman1776 said:

And, this post, like so many others on this thread, has nothing at all to do with traditional muzzle loading. :surrender:

Click to expand...

By traditional muzzle loading, do you mean like doing it with a delrin ramrod?

Spence

Click to expand...

Perzactly. Why, them original mountain men cut down so many Delrin trees the virtually extincted them out west. :slap: :v

So long as there is some spin my round balls don't seem to tumble. I hate when they tumble. :surrender:

My prb will keyhole if not pushed hard enough. :rotf:

:blah: Na-na CC, made ya look.

:rotf: Yes! you did... :thumbsup: