Quantcast

Does a RB travel with constant rotation, or accelerate?

Help Support Muzzle Loading Forum:

Status
Not open for further replies.

nkbj

Cannon
MLF Supporter
Joined
Jan 31, 2009
Messages
7,190
Reaction score
418
Larry's original question was:
Here is the question: Does the RB continue rotation of 1 turn every 4', or does it accelerate to a faster rotation?
The answer is: NO.
Well, as has been previously beat to death, the RPM's do not increase. What happens is that the forward motion of the ball slows more quickly than does its rotation. That means that proportionally, rotation as compared to the forward motion continually increases until something gets in the ball's way.

Perhaps the original question was spot on in concept.
 

Cobra6

40 Cal
MLF Supporter
Joined
Feb 18, 2020
Messages
212
Reaction score
127
Location
Catlett Va.
Zonie

Concerning the above, "things that are moving."

That was my point in quoting you about bullet velocities relative to other external forces. Maybe a little too much fluff. :)


Cobra 6
 
Last edited:

Carbon 6

Cannon
Joined
Nov 2, 2018
Messages
6,544
Reaction score
3,063
The bullet is spinning (about 24 miles per hour) ,
The planet is rotating (about 1000 miles per hour),
It revolves around the sun (at about 67,000 miles per hour)
Our solar system is moving ( 514,495 miles per hour)
Our galaxy is moving. (1.3 million miles per hour.)
Everything is moving.
 

Bob McBride

45 Cal.
MLF Supporter
Joined
Apr 23, 2020
Messages
916
Reaction score
1,243
Location
Short Mountain, TN
The bullet is spinning (about 24 miles per hour) ,
The planet is rotating (about 1000 miles per hour),
It revolves around the sun (at about 67,000 miles per hour)
Our solar system is moving ( 514,495 miles per hour)
Our galaxy is moving. (1.3 million miles per hour.)
Everything is moving.
Except for me. I'm smoking the first pinch from a fresh tin of Squadron Leader in the old briar pipe and parooosing the forum.....

....and besides that, they're only moving in relation to one another. Which is exactly the same as setting still. Einstein settled that....
 

Carbon 6

Cannon
Joined
Nov 2, 2018
Messages
6,544
Reaction score
3,063
Except for me. I'm smoking the first pinch from a fresh tin of Squadron Leader in the old briar pipe and parooosing the forum.....

....and besides that, they're only moving in relation to one another. Which is exactly the same as setting still. Einstein settled that....
If you're smoking, you are definitely accelerating.
 

tenngun

Cannon
MLF Supporter
Joined
Jan 27, 2008
Messages
13,079
Reaction score
3,512
Location
Republic mo
You all think that somewhere Steve, Al, and Ike are all sitting around laughing at our thread.
No doubt with a good pipe and a twelve year old scotch.
 

Canute Rex

40 Cal.
Joined
Apr 19, 2012
Messages
280
Reaction score
45
I'll keep all this in mind when I do a drive by shooting on the Roundheads with my matchlock out the window of my carriage. I'll have my driver whipping the horses to a gallop, so it will be tricky. Maybe I should use a ribaldequin or volley gun.

Joking aside, this discussion points out that we are doing something mostly by estimation and rough experimentation that encompasses some of the toughest problems in engineering and physics; combustion, fluid dynamics, moving body dynamics, turbulence, complex structure harmonics, friction, and tribology. And yet we hit targets.
 

rdlowe

Pilgrim
MLF Supporter
Joined
Dec 11, 2015
Messages
236
Reaction score
185
Location
Dallas TX
Joking aside, this discussion points out that we are doing something mostly by estimation and rough experimentation that encompasses some of the toughest problems in engineering and physics; combustion, fluid dynamics, moving body dynamics, turbulence, complex structure harmonics, friction, and tribology. And yet we hit targets.
I like this take on things. Hitting the target isn’t hard, usually. Understanding why that’s true is trickier than it seems, and full of pitfalls.
 

Crow-Feather

32 Cal.
MLF Supporter
Joined
Jan 28, 2004
Messages
458
Reaction score
232
Location
Idaho
When the RB leaves the muzzle it has already rotated 1 complete turn. Here is the question: Does the RB continue rotation of 1 turn every 4', or does it accelerate to a faster rotation?
Flintlocklar 🇺🇲 :dunno:
Do you have a 4 foot barrel? Otherwise, how can it make a complete turn in the barrel?
 

Crow-Feather

32 Cal.
MLF Supporter
Joined
Jan 28, 2004
Messages
458
Reaction score
232
Location
Idaho
Hey guy I am a Physicist, Quantum and otherwise. And check this out: I never called you a liar,
Have a good day smelling the white smoke!
☢☢☢☢☢☢☢♊R🔴
MrMackc, if your a Physicist, maybe you can help me. I get this pain in my elbow when I straighten out my arm. Should I get it Xrayed?
 

Larry (Omaha)

50 Cal.
MLF Supporter
Joined
Aug 27, 2004
Messages
1,131
Reaction score
726
Do you have a 4 foot barrel? Otherwise, how can it make a complete turn in the barrel?
Thanks for your reply. Here is part of my original post: So, I am going to ask the experts here. A 50 cal, 48" barrel, with 1 revolution in 48" twist is fired using 60 grains of 2F.
Flintlocklar 🇺🇸
 

Crow-Feather

32 Cal.
MLF Supporter
Joined
Jan 28, 2004
Messages
458
Reaction score
232
Location
Idaho
Thanks for your reply. Here is part of my original post: So, I am going to ask the experts here. A 50 cal, 48" barrel, with 1 revolution in 48" twist is fired using 60 grains of 2F.
Flintlocklar 🇺🇸
I am sometimes quite confused and lost in these discussions. My apologies for my poor reading and thank you for starting an interesting discussion.
My curiosity is concerned more with why a rotating ball doesn't curve like a baseball thrown by a pitcher.
 

Bob McBride

45 Cal.
MLF Supporter
Joined
Apr 23, 2020
Messages
916
Reaction score
1,243
Location
Short Mountain, TN
I am sometimes quite confused and lost in these discussions. My apologies for my poor reading and thank you for starting an interesting discussion.
My curiosity is concerned more with why a rotating ball doesn't curve like a baseball thrown by a pitcher.
A baseball has the raised stitching specifically for catching air and inducing curve in it's flightpath. The pitcher throws the ball in such a way that the direction of spin is not the same as rifling induced spin, ei, directly at the plate, but tilted in one direction or another so the direction of the throw and the spin are not aligned causing the ball to arc.
 

fleener

50 Cal.
Joined
Mar 27, 2010
Messages
1,937
Reaction score
287
Location
USA
My oldest son and 4 of his buddy's are all materials engineers with Cat. They will be coming to the farm tonight for the weekend to play. Tomorrow night while we sit around the camp fire contemplating the meaning of life, enjoying a well blended whisky, I will pose the question. They will most likely look at me like I am an idiot, answer the question and after 30 seconds move on.

I also will be teaching them how to use a flint and steel. They have been getting into heat treating at work so they will enjoy that.

Fleener
 

Larry (Omaha)

50 Cal.
MLF Supporter
Joined
Aug 27, 2004
Messages
1,131
Reaction score
726
I also will be teaching them how to use a flint and steel. They have been getting into heat treating at work so they will enjoy that.

Fleener
Good idea about flint and steel! Don't forget to show them how to use your home made firepiston.
Flintlocklar 🇺🇲
 

fleener

50 Cal.
Joined
Mar 27, 2010
Messages
1,937
Reaction score
287
Location
USA
Larry

You must have a camera in my house??? I have been looking all over for my fire piston. Cant find it.

These kids have been learning to fish (with the exception of my son). I have 2 farm ponds and the fish are usually fighting to get on a hook. It spoils them.

Fleener
 

fleener

50 Cal.
Joined
Mar 27, 2010
Messages
1,937
Reaction score
287
Location
USA
Well, Larry, you got me to go digging around again for the 20th time. I found it exactly where I put it. So now I can do the fire piston with them as well. The good thing is I am heading to AK on a hunt and was wanting to take it with me.

Fleener
 

Zonie

Moderator
Staff member
Moderator
MLF Supporter
Joined
Oct 4, 2003
Messages
31,510
Reaction score
4,511
Location
Phoenix, AZ
Well, now that we're down to talking about fire starters and fishing trips, I think we've pretty much answered the OP's question, or, we've come up with enough confusing, conflicting ideas he's sorry he ever asked it.

With that, and 13 pages of posts, I'm going to close this thread.
 
Status
Not open for further replies.

Latest posts

Top