25-08-2015, 08:59 PM
Hi Andre, Simon
I used to run a small business making ammunition components
Secant ogive is a term for describing the shape of the nose of a projectile in relation to it's diameter. It's described like this so you can have the same shape regardless of it size. All you have to know is the number of calibres that the ogive radius is and the formula to describe the geometry
A secant ogive projectile has the advantage that it's a lot shorter than a tangent ogive and is very close to being as good aerodynamically.
Here's a pick I found on the net that kind of describes the concept.
N is the number if calibres that form the radius of the ogive not the radius of the bullet it self, The Caliber is the diameter of the of the bottom of the grooves of the rifling in the barrel, ie the bullet diameter.
I used to run a small business making ammunition components
Secant ogive is a term for describing the shape of the nose of a projectile in relation to it's diameter. It's described like this so you can have the same shape regardless of it size. All you have to know is the number of calibres that the ogive radius is and the formula to describe the geometry
A secant ogive projectile has the advantage that it's a lot shorter than a tangent ogive and is very close to being as good aerodynamically.
Here's a pick I found on the net that kind of describes the concept.
N is the number if calibres that form the radius of the ogive not the radius of the bullet it self, The Caliber is the diameter of the of the bottom of the grooves of the rifling in the barrel, ie the bullet diameter.
“The knack of flying is learning how to throw your machine at the ground and miss.”
"When once you have tasted flight, you will forever walk the earth with your thoughts turned skyward, for there you have been, and there you will always long to return." ~Leonardo Da Vinci