https://www.youtube.com/watch?v=6X375Jot8pw
Telescoping projectiles increase their length during flight, and have the potential to penetrate deeper then standard projectiles. This video simulates standard telescoping APFSDS projectiles to compare how they perform to monolithic penetrators as well as proposing a new telescoping design.
The standard telescoping design is similar to ones collated in [2], with the same conclusions being drawn (the telescope does not form a wide enough cavity for the sleeve).
Pros and Cons for different designs (compared to standard monolithic):
Standard Telescope:
+Early Detonation of ERA
+Potentially Increased Resistance to ERA
-More likely to shatter
-Increased complexity
Trailing Telescope:
+Increased Penetration
+Early Detonation of ERA
+Potentially Increased Resistance to ERA
-More likely to shatter
-Increased Complexity
Slender (L/D=30)
+Increased Penetration
+Increased Velocity
-More likely to shatter
-More affected by ERA
References:
[1] Odermatt Formula: http://www.longrods.ch/perfcalc.php
[2] Paper containing similar telescoping results: https://www.researchgate.net/publicat…
[3] Material Properties: https://core.ac.uk/download/pdf/28829…
The hardness used in the Odermatt formula was 300 BHN.