U.S. CitiesCity-Data Forum Index
Covid-19 Information Page
Go Back   City-Data Forum > General Forums > Science and Technology
 [Register]
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
View detailed profile (Advanced) or search
site with Google Custom Search

Search Forums  (Advanced)
Reply Start New Thread
 
Old 05-01-2020, 12:16 AM
 
Location: Redwood Shores, CA
666 posts, read 245,111 times
Reputation: 704

Advertisements

Based on my research, the cannonball seems to be just a piece of dead metal:

https://science.howstuffworks.com/flintlock1.htm

However in movies and paintings I have seen, it is often depicted that the cannonball would explode when it lands/impacts. What is the true behavior?

If indeed it explodes, how does it work?
Reply With Quote Quick reply to this message

 
Old 05-01-2020, 02:06 AM
 
Location: San Antonio/Houston/Tricity
42,183 posts, read 60,990,009 times
Reputation: 98909
Historically, most cannonballs did not explode. They were simply large, heavy, deadly pieces of metal.
However, the ones that did were known as "carcass shot" and were basically hollow and filled with gunpowder.

In movies that's just a visual effect. Many movie effects aren't happening in real life.

Explained here:
https://sciencing.com/cannonballs-work-6171245.html
https://en.wikipedia.org/wiki/Carcass_(projectile)

All cannon projectiles explained:
https://en.wikipedia.org/wiki/List_o...on_projectiles
__________________
.
"No Copyrighted Material"
Moderated forums:
World, Europe, Texas, Corpus Christi, El Paso, Lubbock, Tyler, Houston, San Antonio, Tallahassee, Minnesota,
Economics, Investing, Personal Finance
Fish, Home Interior Design and Decorating, Science and Technology Forums
.

Need help? Click on this: >>> ToS, Mod List, Rules & FAQ's, Guide, CD Home page, How to Search
Realtors are welcome here but do see our Realtor Advice to avoid infractions.
Reply With Quote Quick reply to this message
 
Old 05-01-2020, 06:46 AM
 
Location: Ohio
519 posts, read 102,065 times
Reputation: 404
Any object can be made to explode, but regular Cannon balls do not.

While touring Baltimore's Fort McHenry they had a few British Cannon balls on display, quite heavy and solid. Assuming they were clumps of iron, etc., the "Explosion" heard when they hit is not the cannonball exploding (they it may break apart) it is the sound (s) created when two objects collide.

Crude example. When lightning strikes it will or can expand the air, result, Thunder.

Now the air has exploded basically, but it is two forces meeting creating it, sound that is.
Reply With Quote Quick reply to this message
 
Old 05-01-2020, 07:53 AM
 
7,648 posts, read 3,605,936 times
Reputation: 21800
In the days of muzzle loading artillery, there were solid shot (the stereotypical "cannonball"), used for battering down walls of a fort or punching holes in the side of a ship; grapeshot, canister, and the like, which are collections of smaller projectiles, used for personnel destruction; incendiaries, used to set things on fire (sometimes these were red hot solid shot); and explosive shells, which are filled with powder and explode by means of a fuse.
Reply With Quote Quick reply to this message
 
Old 05-01-2020, 09:13 AM
 
Location: Redwood Shores, CA
666 posts, read 245,111 times
Reputation: 704
This one for example:

https://263i3m2dw9nnf6zqv39ktpr1-wpe...ER-02-copy.jpg
Reply With Quote Quick reply to this message
 
Old 05-01-2020, 02:21 PM
 
Location: Not far from Fairbanks, AK
17,082 posts, read 30,221,884 times
Reputation: 12996
Most cannon balls were just a chunk of metal, but later some were made to explode. The reason for this is that a of solid chunk metal is designed to penetrate or damage a narrower area on the target, but an explosive cannon ball is designed to fragment. In this case it does not penetrate as much, but the pieces of metal are spread-out over a larger area.

Lest say that you are shooting a wall with a solid cannon ball to ram or penetrate it, or that you are shooting an explosive cannon ball in the middle of a group of soldiers. Which one do you thing would cause more injury or death to a group of people? The same principle: shooting a bullet into a group of people, or a grenade.

https://www.rt.com/viral/382734-expl...lls-civil-war/
Reply With Quote Quick reply to this message
 
Old 05-01-2020, 06:45 PM
 
41,691 posts, read 43,536,932 times
Reputation: 17633
Quote:
Originally Posted by RobertFisher View Post
Based on my research, the cannonball seems to be just a piece of dead metal:

If they were just a hunk metal they could shoot them at a low trajectory so they would roll across the battlefield inevitably hitting something or many things. Not all modern munitions explode either, a sabot round is used for armor penetration because it can direct all of it's energy into small space. A projectile shot from a railgun is traveling so fast it's going to obliterate whatever it hits, no explosives needed.
Reply With Quote Quick reply to this message
 
Old 05-02-2020, 02:01 PM
 
Location: Not far from Fairbanks, AK
17,082 posts, read 30,221,884 times
Reputation: 12996
Quote:
Originally Posted by thecoalman View Post
If they were just a hunk metal they could shoot them at a low trajectory so they would roll across the battlefield inevitably hitting something or many things. Not all modern munitions explode either, a sabot round is used for armor penetration because it can direct all of it's energy into small space. A projectile shot from a railgun is traveling so fast it's going to obliterate whatever it hits, no explosives needed.
The design of modern projectiles (bullets) is based on expansion/non expansion within a range of velocities. For example, a varmint bullet designed to fragment within a certain range of speed (relative to distance), expands and breaks apart, and this in turn reduces the amount of penetration. But once the speed of this bullet falls below the speed it's designed for, it acts like a bullet designed to expand without breaking apart, although penetration is greatly reduced.

A solid bullet is designed so that it does not expand or break apart, which results on great penetration. Consider this one a cannon ball. Also you are correct in that a cannon ball shot at a greater speed, can result in more damage to the surrounding areas.

Berger produces a big game hunting bullet that is designed to penetrate little, and then rapidly expand. This bullet works very well for lung shots on deer-size animals. But a Nosler Partition of the same caliber and weight would not expand as much and penetrate more. A hard-cast or monolithic bullet would pass right through without fragmenting or expanding.

Last edited by RayinAK; 05-02-2020 at 02:12 PM..
Reply With Quote Quick reply to this message
 
Old 05-03-2020, 09:39 PM
 
41,691 posts, read 43,536,932 times
Reputation: 17633
Quote:
Originally Posted by RayinAK View Post
Also you are correct in that a cannon ball shot at a greater speed, can result in more damage to the surrounding areas.

The energy of an object moving is the velocity squared, as the speed increases the energy increases exponentially If we use a car moving at 25MPH as baseline a car moving at 50MPH has 4 times the energy and if it were moving at 100MPH it's 16 times... 200MPH is 256 times. Note this assumes the same mass, a smaller car would have less energy than larger one moving at same speed.



While this applies to any projectile I didn't mention cannonball, I mentioned a railgun. The projectile can be moving at speeds near 8000MPH. If you are trying to destroy a hard target any chemical explosive is redundant if not hindrance because the kinetic energy is so high. Fundamentally it's the same thing as the first cannons made. Take a solid object and shoot it at something as fast as you can. What comes around goes around.
Reply With Quote Quick reply to this message
 
Old 05-04-2020, 09:43 AM
 
Location: Not far from Fairbanks, AK
17,082 posts, read 30,221,884 times
Reputation: 12996
Quote:
Originally Posted by thecoalman View Post
The energy of an object moving is the velocity squared, as the speed increases the energy increases exponentially If we use a car moving at 25MPH as baseline a car moving at 50MPH has 4 times the energy and if it were moving at 100MPH it's 16 times... 200MPH is 256 times. Note this assumes the same mass, a smaller car would have less energy than larger one moving at same speed.



While this applies to any projectile I didn't mention cannonball, I mentioned a railgun. The projectile can be moving at speeds near 8000MPH. If you are trying to destroy a hard target any chemical explosive is redundant if not hindrance because the kinetic energy is so high. Fundamentally it's the same thing as the first cannons made. Take a solid object and shoot it at something as fast as you can. What comes around goes around.
Good points.
Reply With Quote Quick reply to this message
Please register to post and access all features of our very popular forum. It is free and quick. Over $68,000 in prizes has already been given out to active posters on our forum. Additional giveaways are planned.

Detailed information about all U.S. cities, counties, and zip codes on our site: City-data.com.


Reply
Please update this thread with any new information or opinions. This open thread is still read by thousands of people, so we encourage all additional points of view.

Quick Reply
Message:


Over $104,000 in prizes was already given out to active posters on our forum and additional giveaways are planned!

Go Back   City-Data Forum > General Forums > Science and Technology
Follow City-Data.com founder on our Forum or

All times are GMT -6.

© 2005-2020, Advameg, Inc. · Please obey Forum Rules · Terms of Use and Privacy Policy · Bug Bounty

City-Data.com - Contact Us - Archive 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37 - Top