Previous in Forum: Preventing Rust on Guns or Tools Stored Underground   Next in Forum: Welding Trailing Arms of a Frame Work
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
Page 2 of 2: « First < Prev 1 2 Last »
Rate Comments: Nested
Sanjayvt
Associate

Join Date: Oct 2007
Posts: 40
Good Answers: 3

Does Bullet Burn with Friction in Air?

11/08/2011 2:08 AM

21 gun salute and shooting in air is not uncommon.

The bullet should travel upward under G Force till its velocity becomes zero and then start downword and should arrive at ground level with velocity of launching again.

If hit someone he will be killed but never heard something like this. Why? Is the bullet burns itself due to friction with air? Completely? Partially bun bullet shall reduce in mass and increase acceleration and hence velocity ? (conservation of momentum) which will keep the force of hitting same?
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Smoothy
Power-User

Join Date: Mar 2011
Location: Ground Zero of the Pompous and self important....Washington DC
Posts: 416
Good Answers: 8
#70
In reply to #65
 Find in discussion

Re: Does Bullet Burn with Friction in Air?

11/09/2011 2:52 PM

Roughly 30-45 degrees above horizontal through unscientic observation. I've been to several funerals of ex-service men that had the 12 gun salutes. Navy and Army.
Register to Reply
Smoothy
Power-User

Join Date: Mar 2011
Location: Ground Zero of the Pompous and self important....Washington DC
Posts: 416
Good Answers: 8
#72
In reply to #70

Re: Does Bullet Burn with Friction in Air?

11/09/2011 3:08 PM

Dangit it....I meant 21 gun salute....not 12.
Register to Reply
JohnDG
Guru
United Kingdom - Member - Not a New Member Hobbies - Musician - New Member Hobbies - Fishing - New Member

Join Date: May 2006
Location: Reading, Berkshire, UK. Going under cover.
Posts: 9684
Good Answers: 468
#73
In reply to #72

Re: Does Bullet Burn with Friction in Air?

11/09/2011 4:42 PM

I thought 12 must've been wrong, as it's tradition to have an odd number.

According to Wikipedia, you must've known some pretty high-ranking ex-service men.

__________________
 "Love justice, you who rule the world" - Dante Alighieri
Register to Reply Score 1 for Good Answer
Go to Next "Almost" Good Answer
Anonymous Hero
Guru
Popular Science - Evolution - New Member Popular Science - Weaponology - New Member

Join Date: May 2006
Location: The 'Space Coast', USA
Posts: 11119
Good Answers: 918
#74

Re: Does Bullet Burn with Friction in Air?

11/09/2011 7:20 PM

That is because they use blanks.
Register to Reply
osborne83
Power-User

Join Date: Sep 2008
Posts: 141
Good Answers: 15
#75

Re: Does Bullet Burn with Friction in Air?

11/09/2011 11:16 PM

A 21-gun salute is conducted with blanks. No bullets are launched.

Shooting in the air does kill people. A 9-year old girl was killed in Phoenix, AZ a few years ago by someone celebrating a holiday by shooting in the air.

At the velocities that a bullet is travelling, it does not reach temperatures required to even melt, much less burn up. Additionally, it is rapidly slowing due to drag and, in the case of being fired into the air, gravity. It will not reach it's initial velocity on the fall to earth due to atmospheric friction, but it will reach a velocity sufficient to be lethal.
Register to Reply
edignan
Guru
Engineering Fields - Systems Engineering - New Member Popular Science - Weaponology - New Member

Join Date: Jun 2006
Location: Borrego Springs
Posts: 2636
Good Answers: 62
#85

Re: Does Bullet Burn with Friction in Air?

11/11/2011 12:19 PM

WOW

Subscribed and Un Subscribed in under a minute!

New record for me

__________________
 "If you want to get somewhere else, you must run at least twice as fast as that!"
Register to Reply
redJohn75766
Associate
United States - US - Statue of Liberty - New Member Engineering Fields - Electrical Engineering - New Member Popular Science - Genetics - New Member

Join Date: Nov 2011
Posts: 36
#86

Re: Does Bullet Burn with Friction in Air?

11/11/2011 3:08 PM

Shooting in the air can usually only kill somebody if they shoot up and at an angle this allows the bullet to maintain forward velocity if it is fired straight up it usually will not kill you because on the way down it can only reach terminal velocity due to air friction this is usually enough to leave a nice knot on your head, possibly knock you out but usually you will survive here is how you calculate the ending speed of a bullet where Vt is terminal velocity of that specific bullet, Vo is starting velocity, and T is the starting angle of the bullet (theta) (Vo*cos(T)^2+Vt^2)^.5 at angle atan(Vt/Vo*cos(T)) (this assumes the bullet was fired high enough to reach Vt on the way down it also does not account for forward velocity loss due to friction) *this is not encouragement to try to fire a bullet straight up all the math and physics in the world can't overcome stupidity*
Register to Reply
ChaoticIntellect
Guru
Popular Science - Cosmology - New Member Engineering Fields - Civil Engineering - New Member Engineering Fields - Nuclear Engineering - New Member United States - Member - New Member

Join Date: Aug 2010
Posts: 714
Good Answers: 38
#88

Re: Does Bullet Burn with Friction in Air?

11/15/2011 3:48 PM

Does Bullet Burn with Friction in Air?

Perhaps we need to take a more subjective view. Suppose the bullet has never bucked hay and is, for lack of vocabulary, "girly".... in which case maybe the slight heating it would experience could be described as "burning"!

__________________
 Sometimes my thoughts are in a degree of order so high even I don't get it...
Register to Reply
Smoothy
Power-User

Join Date: Mar 2011
Location: Ground Zero of the Pompous and self important....Washington DC
Posts: 416
Good Answers: 8
#89
In reply to #88

Re: Does Bullet Burn with Friction in Air?

11/15/2011 7:08 PM

Also....there are such things as tracer rounds and incendiary rounds....those actually burn....but not due to friction with the air however.
Register to Reply
Oldr&wiser
Associate

Join Date: Jul 2008
Location: Red River Valley
Posts: 35
Good Answers: 1
#90
In reply to #89

Re: Does Bullet Burn with Friction in Air?

11/15/2011 9:19 PM

Tracer bullets do not "burn per se" -- a small charge of pyrotechic compound in the base is ignited by the powder burn and provides the visible "trace" of the bullet path,
Register to Reply
Register to Reply
Have a Different Question?
Page 2 of 2: « First < Prev 1 2 Last »

Good Answers:

These comments received enough positive votes to make them "good answers".

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Copy to Clipboard

Users who posted comments:

34point5 (3); 666 (1); Andy Germany (6); Anonymous Hero (1); Anonymous Poster (15); Bike Master (1); Chankley (2); ChaoticIntellect (1); cuba_pete (8); durtieduck (2); edignan (1); Envelope Guy (2); Epke (1); Grand Poobah (3); Graycav (1); Haajee (7); Hendrik (3); HiTekRedNek (3); hithuanand (1); JohnDG (3); johnfotl (1); Kalboon (4); LAA_Lucke (2); lyn (9); oilcan13 (3); Oldr&wiser (1); osborne83 (2); phph001 (1); PWSlack (1); redJohn75766 (1); robin.muir (1); ronseto (2); Sandman (2); Sanjayvt (2); Sapper (3); Smoothy (4); SolarEagle (2); Tornado (1); trgrcntrl (1); user-deleted-1105 (2)

Previous in Forum: Preventing Rust on Guns or Tools Stored Underground   Next in Forum: Welding Trailing Arms of a Frame Work

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
General Discussion:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (91 right now)
Show Members
Advertisement