14/09/2016-21:23:43
RE: Onken sur Buyee
Bonsoir
Une petite recherche sur le web à propos de la réglementation :
"When accepting magnetized material,
aircraft operators should ensure that the shipper verifies that
the maximum field strength is no greater than 0.00525 gauss when
measured at 15 feet from all surfaces of the package."
That's 0.5 uT (micro tesla) at 5m in 20th century units!
Since field-strength falls off as 1/r^3 for a dipole that means strong permanent magnets (upto 1.2T) should be a few cm across or less. The earth's field is between 25 and 65 uT so 0.5 micro tesla represents a degree or so of error.
A vérifier mais je ne pense pas qu'un HP seul ou deux puisse perturber un système de navigation.
Cdt
Jean-Louis
Une petite recherche sur le web à propos de la réglementation :
"When accepting magnetized material,
aircraft operators should ensure that the shipper verifies that
the maximum field strength is no greater than 0.00525 gauss when
measured at 15 feet from all surfaces of the package."
That's 0.5 uT (micro tesla) at 5m in 20th century units!
Since field-strength falls off as 1/r^3 for a dipole that means strong permanent magnets (upto 1.2T) should be a few cm across or less. The earth's field is between 25 and 65 uT so 0.5 micro tesla represents a degree or so of error.
A vérifier mais je ne pense pas qu'un HP seul ou deux puisse perturber un système de navigation.
Cdt
Jean-Louis