LP.08 Back Sight

[Johnny Peppers]

Don't remember if I have posted this previously, but if I have and you read it, just skip this post.

I am sure that most that have looked at a LP.08 (Artillery) have noticed that as the back sight is raised, it moves to the left. This was to correct for "rotational drift" of the bullet over longer range. When the bullet is fired with the muzzle pointing up to a degree, as the bullet tries to nose over the air pressure under the nose of the bullet tries to keep the bullet up. This causes the bullet to drift in the direction of rotation, and the sight compensates for this driftl

From the pictures you can see that the hinge pin of the back sight is drilled at an angle, and while it does not show, the sight base and sight leaf are machined at an angle so that the leaf moves to the left as it is raised.

Information

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[Bob K]

I never knew that. Now I'll have to dig out my artillery to check it out.

[jmoore]

I remember your previous thread, but it's still a good illustration.