Accession Number : AD0714520

Title :   An Assessment of Ice Loadings on the Aerial Outfits AKE2 and AKE4.

Descriptive Note : Technical rept.,

Corporate Author : ADMIRALTY SURFACE WEAPONS ESTABLISHMENT PORTSMOUTH (ENGLAND)

Personal Author(s) : Petherick,V. C.

Report Date : JUN 1970

Pagination or Media Count : 22

Abstract : It is expected that ice will form on the AKE2 and AKE4 array at mast head height under certain arctic conditions. An assessment of the accretion rate on the open mesh type structure, which forms the major part of this aerial's construction was carried out under controlled environmental conditions. The investigations showed that a maximum ice loading of 2032 kg (2 tons) could be expected on the aerial and a wind load of 4064 kg (4 tons) could be obtained when the fully iced array was trained into storm force winds. The only method found of reducing these loadings was to train the array such that the ends or smallest areas were presented to the elements. The additional loadings imposed on the array are unlikely to affect te structure as the design specification loadings for this aerial are far in excess of those due to ice and wind. It was also shown that excessive amounts of ice formed in the reflector horns and this is expected to degrade the radar performance appreciably early on in the build up cycle. (Author)

Descriptors :   (*SHIP ANTENNAS, LOADS(FORCES)), ICE, RADAR ANTENNAS, COLD WEATHER TESTS, GREAT BRITAIN

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE