Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Reloading

Reloading Techniques For Reloading


Reply

What is ogive?

 
LinkBack Thread Tools Display Modes
  #15  
Old 03-28-2010, 10:13 PM
Platinum Member
 
Join Date: Feb 2005
Location: Nevada
Posts: 2,782
Re: What is ogive?

Quote:
Originally Posted by boomtube View Post
He said it's that part of the bullet between the full diameter and point.

+1

When it comes to bullets that's it!!!!



The ogive is that section from point of tangency in this photo to the tip of the bullet.
That whole section is the ogive.
__________________
-----------------------------

-----------------------------
HEBREWS 13:8
Jesus Christ the same yesterday, and to day, and for ever.

Our Lord Jesus said that as it was in the days of Noah and
also as it was in the days of Lot so it shall be in the days...
It's happening again!!! God sent to us His prophet, and His Word
to this generation and we once more are rejecting it as was prophesied!!!

---> As promised, God Sent His Prophet to us!

Last edited by Eaglet; 03-28-2010 at 10:22 PM.
Reply With Quote
  #16  
Old 03-28-2010, 11:00 PM
Platinum Member
 
Join Date: May 2008
Location: South of Canada and North of Wyoming
Posts: 5,953
Re: What is ogive?

Quote:
Quote:
Originally Posted by Eaglet View Post
+1

When it comes to bullets that's it!!!!



The ogive is that section from point of tangency in this photo to the tip of the bullet.
That whole section is the ogive.
Yeah... the curvy part... right???
Reply With Quote
  #17  
Old 03-28-2010, 11:33 PM
Platinum Member
 
Join Date: Feb 2005
Location: Nevada
Posts: 2,782
Re: What is ogive?

Quote:
Originally Posted by MontanaRifleman View Post
Yeah... the curvy part... right???
Right??? YES!!! Bullet ogive are sections of circular arcs. (In the profile of the picture)
__________________
-----------------------------

-----------------------------
HEBREWS 13:8
Jesus Christ the same yesterday, and to day, and for ever.

Our Lord Jesus said that as it was in the days of Noah and
also as it was in the days of Lot so it shall be in the days...
It's happening again!!! God sent to us His prophet, and His Word
to this generation and we once more are rejecting it as was prophesied!!!

---> As promised, God Sent His Prophet to us!
Reply With Quote
  #18  
Old 03-29-2010, 07:30 AM
Platinum Member
 
Join Date: Oct 2007
Location: Mountians of SW NC, near Asheville
Posts: 1,596
Re: What is ogive?

"It's like uhhh... the curvy part of the bullet between the bearing surface (outer shank) and the tip of the bullet "

Originally Posted by MontanaRifleman
Yeah... the curvy part... right???

"Right??? YES!!! Bullet ogive are sections of circular arcs. (In the profile of the picture) "


Well, it's usually curved. But then some guy would come along and point out that section doesn't need to be curved to be an ogive.

Decreasing circular sections? Yes, but even that gets a bit more technical than it need be. AND, from what I read on the net, it's clear that some think the "ogive" is ONLY the circle that matches the bore diameter (rifleing contact point), ignoring all the rest of it. Oh well, it's a harmless error.
Reply With Quote
  #19  
Old 03-29-2010, 09:58 AM
Gold Member
 
Join Date: Aug 2009
Posts: 693
Re: What is ogive?

There are more to it then just curvy side, I did some research and here what I came up with:

Most supersonic aircraft, rockets, and missiles use a nose shape very similar to a cone but a little more rounded to provide more internal volume. This shape is called an ogive (pronounced "oh-zheeve" or "oh-zhive"). The faster the vehicle is designed to go, the more pointed the ideal aerodynamic nose shape becomes.



The ideal nose shape for a projectile that minimizes its drag and maximizes its altitude depends on how fast the projectile is designed to travel

Tangent ogive
Next to a simple cone, the tangent ogive shape is the most familiar in hobby rocketry. The profile of this shape is formed by a segment of a circle such that the rocket body is tangent to the curve of the nose cone at its base; and the base is on the radius of the circle. The popularity of this shape is largely due to the ease of constructing its profile.

The radius of the circle that forms the ogive is called the Ogive Radius ρ and it is related to the length and base radius of the nose cone as expressed by the formula : ρ = (R^2 + L^2) / 2R The radius y at any point x, as x varies from 0 to L is: y = sqrt(ρ^2 - (x - L)^2)+R - ρ The nose cone length, L, must be equal to, or less than the Ogive Radius ρ. If they are equal, then the shape is a hemisphere.

Secant ogive
The profile of this shape is also formed by a segment of a circle, but the base of the shape is not on the radius of the circle defined by the ogive radius. The rocket body will not be tangent to the curve of the nose at its base. The Ogive Radius ρ is not determined by R and L (as it is for a tangent ogive), but rather is one of the factors to be chosen to define the nose shape. If the chosen Ogive Radius of a Secant Ogive is greater than the Ogive Radius of a Tangent Ogive with the same R and L, then the resulting Secant Ogive appears as a Tangent Ogive with a portion of the base truncated.


ρ > {R^2 + L^2 / 2R} and alpha = arctan ({R / L}) - arccos ({sqrt{L^2+R^2} / 2ρ})

If the chosen ρ is less than the tangent ogive ρ, then the result will be a Secant Ogive that bulges out to a maximum diameter that is greater than the base diameter. The classic example of this shape is the nose cone of the Honest John. Also, the chosen ogive radius must be greater than twice the length of the nose cone.

Told you just get bullet comparator...
Reply With Quote
  #20  
Old 03-29-2010, 03:21 PM
Silver Member
 
Join Date: Jul 2009
Location: Sacramento, CA
Posts: 288
Re: What is ogive?

Finally a redneck answer that I can understand, and it even has a picture. Still alittle fuzzy. Actually I just wanted to know how to measure from the base of the casing to the ogive, instead of to the tip of the bullet. Is a bullet compareitor the best way? Looking for the best way to measure OAL.

Last edited by Firearrow; 03-29-2010 at 03:29 PM.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: What is ogive?
Thread Thread Starter Forum Replies Last Post
Ogive question Tikkamike Rifles, Bullets, Barrels & Ballistics 2 08-12-2011 10:20 AM
6.5 ogive lengths adamdahunta Rifles, Bullets, Barrels & Ballistics 2 06-01-2011 05:29 PM
Tangent Ogive VS Secant Ogive SHRTSHTR Rifles, Bullets, Barrels & Ballistics 8 04-26-2010 01:37 PM
Ogive question. 4ked Horn Rifles, Bullets, Barrels & Ballistics 18 04-05-2005 10:44 PM
bullet ogive Whitetail Hunter Rifles, Bullets, Barrels & Ballistics 5 09-29-2004 12:59 AM


All times are GMT -5. The time now is 07:09 PM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC