Intro to Proximity Fuzes

Question 1

Define a proximity fuze

Answer 1

Proximity fuzes are automatic time fuzes, with or without a PD element, that are designed to function a projectile at the optimum lethal distance from the target, provided that in the case of aircraft targets, the trajectory passes sufficiently close

Question 2

What two groups are proximity fuzes divided into?

Answer 2

Variable time (VT)
-Timer section arms the fuze electronically after firing. No setting for optimum height.
Controlled Variable Time (CVT)
-Can be set to activate to prox function after a set time

Question 3

What are some design considerations?

Answer 3

• Rugged
• Able to function in all conditions
• Light weight
• Economical
• Able to fit to existing projectiles
• Sensitive and rapid in operation
• Not easily jammed
• Safe to handle
• good storage characteristics

Question 4

What is the doppler effect?

Answer 4

Radio waves are reflected and therefore picked up by the receiver within the fuze. Reflected waves interfere with the radiated waves to give a beat known as the Doppler Effect. As the fuze gets closer to the target, the impulses increase to a defined peak value and the fuze functions.

Question 5

What can happen to a proximity fuze that has been dropped?

Answer 5

I can be serviceable, or dangerous as the force of the drop may be sufficient to arm the fuze.