Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Litz's Description of Coriolis.
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Michael Courtney" data-source="post: 909218" data-attributes="member: 28191"><p>You must have the 2nd edition. It's on p. 101 in my copy. Litz is right. The Coriolis effect is always clockwise in the northern hemisphere. That makes it to the right regardless of the direction you are facing. </p><p></p><p>Likewise, counterclockwise in the southern hemisphere is always to the left. </p><p></p><p>It's not just that the earth is moving east under the projectile. It's that points closer to the equator are moving faster than points closer to the poles. When you shoot a bullet north the motion of the earth gives it a horizontal component of velocity to the east, which it retains in flight to the impact point. When it reaches the impact point, the target has not moved as far to the east (it has in longitude, but not in inches), so the bullet hits to the right. Hitting to the east facing north is clockwise, to the right.</p><p></p><p>Conversely, when you shoot to the south, the bullet gets a bit of eastward velocity from the motion of the earth. However, the target, being further to the south, has a greater eastward velocity and moves further east than the bullet while the bullet is in flight, thus the bullet hits slightly to the west. Hitting west facing south is clockwise, to the right.</p><p></p><p>This is an oversimplification that seems to fail the rightward motion when shooting due east or due west, but rest assured that the horizontal deflection is to the right in those cases also. The full explanation requires vectors and cross products and the whole bit.</p></blockquote><p></p>
[QUOTE="Michael Courtney, post: 909218, member: 28191"] You must have the 2nd edition. It's on p. 101 in my copy. Litz is right. The Coriolis effect is always clockwise in the northern hemisphere. That makes it to the right regardless of the direction you are facing. Likewise, counterclockwise in the southern hemisphere is always to the left. It's not just that the earth is moving east under the projectile. It's that points closer to the equator are moving faster than points closer to the poles. When you shoot a bullet north the motion of the earth gives it a horizontal component of velocity to the east, which it retains in flight to the impact point. When it reaches the impact point, the target has not moved as far to the east (it has in longitude, but not in inches), so the bullet hits to the right. Hitting to the east facing north is clockwise, to the right. Conversely, when you shoot to the south, the bullet gets a bit of eastward velocity from the motion of the earth. However, the target, being further to the south, has a greater eastward velocity and moves further east than the bullet while the bullet is in flight, thus the bullet hits slightly to the west. Hitting west facing south is clockwise, to the right. This is an oversimplification that seems to fail the rightward motion when shooting due east or due west, but rest assured that the horizontal deflection is to the right in those cases also. The full explanation requires vectors and cross products and the whole bit. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Litz's Description of Coriolis.
Top