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RC 90/Shelter -95 : Rapport från vapenverkansförsök : Bilaga 1 Fragment test with Mk 82 bombs
Wirén Tommy
Räddningsverket (SRV)
Sammanfattning Fyra test utfördes med syfte att se skillnader i fragmentmönstret, bl a med bomb i horisontalläge och i vertikalläge. Detta är en bilaga till rapport RC 90/Shelter –95 (id nr 7100) "Report from tests of Rescue Centre and Shelter components with GP bombs. l. Preface The Swedish Rescue Services Agency tested during August 1995 components for Rescue Centres and Shelters at Kirtland Airforce Base with the support from DNA and AR.A. The tests also included surveying and collection of data on fragment effects from Mk 82 bombs. The purpose was to use the information to calculate the vulnerability of different RC 90 and shelter concepts as this type of bomb is regarded as the design weapon for the Swedish installations. A main report describing the whole project is published in Swedish by the Swedish Rescue Services Agency. Later there will be published 3 supplements to this report. The first supplement is an analysis of the fragment effects, the second is a shockspectrum analysis and the third is a collection of all test data. This report in English shows the primary effects of fragments. The Swedish Rescue Services Agency wishes to express its great gratitude to DNA Field Command and ARA for excellent support during the tests. 2. Summary Four tests were performed using Mk 82 bombs. Witness plates were used for collection of fragment data and number of hits. Steel plates 1200 x 1200 mm with the thickness of 25 and 51 mm were used as witness plates. The plates were mounted on wooden stands and placed in a half circle around the bomb at a distance of 7 m. The bombs were mounted vertically during 3 tests and horizontally du ing 1 test. The purpose was to see the difference in the fragment pattern. With the bomb in horizontal position during detonation it was observed that 90 % of the fragments hit the plates within a sector of 30 degrees. The sector was divided in a 10 degree sector forwards, (towards the bomb nose), and a 20 degree sector backwards with reference to a line perpendicular to the centre line of the bomb. Most of the hits with a vertical bomb occured in the upper plates, 1,2 m above the ground, which confirms the result with the horizontal bomb. The following results could be noticed. The 25 mm plates got in all 210 hits of which 118 were perforations. That is 56 % or 3,3 perforations per m2. The 51 mm plates got in all 183 hits of which 3 were penetrations. That is 1,6 % or 0,08 perforations per m2.