Patent ID: 7699003

Claim:
A safety and arming unit including a safe separation distance device ( 14 ), which acts as a function of a free-flight incident flow and a temperature, for a fuze ( 12 ) of a projectile ( 11 ), wherein the safe separation distance device ( 14 ) has a measurement device measuring the cooling of a conductor through which current passes, as a function of the incident flow; wherein the conductor includes at least one heating element ( 16 ) which is placed on the fuze casing surface ( 17 ) exposed to the free-flight incident flow ( 15 ); wherein at least two heating elements ( 16 - 16 ″) are provided. located one behind the other in the direction of the incident flow ( 15 ) and having equally supplied heating circuits ( 18 , 18 ″); and wherein the heating elements ( 16 - 16 ″) are each arranged on an electrical heating mat ( 25 ) possessing an inherent heating circuit ( 26 ).