Jan C. Still Lugerforums banner
1 - 8 of 8 Posts

· Premium Member
Joined
·
125 Posts
Discussion Starter · #1 ·
The reasons for the high stiffness requirement of a Luger Magazine (which leads to the need for a loading tool) are primarily due to (1) the fast toggle action, and (2) the grip angle.

The larger the grip angle the stiffer the required magazine spring. The following Figure shows a force diagram where the spring force is resolved into two components: horizontal force F1 (green) and a vertical force F2 (orange). F1 does not help push the bullets upward and therefore it wastes a portion of the mag sprig energy. Only F2 does useful work but its effectiveness is diminished as the grip angle is increased. For a grip angle of 55 degrees about 80% of the spring exerted force is actually pushing the bullets upwards.

Therefore, a significant amount (20%) of spring energy is wasted (as friction between the mag lip and the mag wall). In fact this friction force points downward (not shown in figure) and acts against the upward force F2. Implying that lubricating the interior front-side of the mag tube is very helpful.

Air gun Trigger Line Gun barrel Font
 

Attachments

· Super Moderator
Joined
·
3,003 Posts
Your comments about F1 were resolved after the zig-zag spring became standard. Once the new type of spring was the "standard", and the "extruded" body was also "standard", the angle of the cartridge carrier was no longer binding against the front wall of the magazine's body to the extent of the earlier type of magazines with the coil spring. Regards, JIM
 

· Premium Member
Joined
·
125 Posts
Discussion Starter · #3 ·
Your comments about F1 were resolved after the zig-zag spring became standard. Once the new type of spring was the "standard", and the "extruded" body was also "standard", the angle of the cartridge carrier was no longer binding against the front wall of the magazine's body to the extent of the earlier type of magazines with the coil spring. Regards, JIM
Elementary physics tells us otherwise. Some of the spring force is lost in F1 regardless of the zigzagging spring redesign. The axis of the spring is at an angle to the vertical direction of lifting bullets. Work is lost unless the grip is perpendicular to the slide.
 

· Registered
Joined
·
1,391 Posts
Elementary physics tells us otherwise. Some of the spring force is lost in F1 regardless of the zigzagging spring redesign. The axis of the spring is at an angle to the vertical direction of lifting bullets. Work is lost unless the grip is perpendicular to the slide.
I don’t understand maths too much but I’ve been shooting for a long time. And I will tell you adding oil to magazines and ammunition is probably a bad idea. It tends to collect dust and dirt
 
1 - 8 of 8 Posts
Top