T4T3R

| 2011 Competitions |
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Standard Impact Attenuator Design |
Formula SAE Standard Impact Attenuator, Type 11Posted 24-Jan-2011 to http://students.sae.org/competitions/formulaseries/ For thepurpose of this notice and subsequent discussions an impact attenuator that has been (1) properly fabricated (2) from the required material and (3) to the dimensions of the standard impact attenuatordesign posted athttp://www.fsaeonline.com/Impact_Attenuator.htm is referred to as the “Type 11 Impact Attenuator”.   The Formula SAE Rules Committee has tested a Type 11 impact attenuator specimenbuilt from Dow Impaxx® 700 energy absorbing foam.  Our test results indicated that the specimen satisfied the requirements of B3.21.1.  Properly fabricated and mounted impact attenuators made from DowImpaxx® 700 and which meet the Type 11 dimensions will be accepted as complying with Rule B3.21.11 and as such are exempt from physical testing.   Teams building a Type 11 impact attenuator must supporttheir use of Dow Impaxx® 700 by bringing a receipt for the material to technical inspection.  The technical inspectors may choose to verify the dimensions and the material and have the authority toconduct any measurements, inspections or tests they feel are necessary.   However, teams have the burden of proof to show their foam is the required material.   Examples of good documentation include areceipt from that competition year, a packing slip or letter of donation.    There is no required supplier of the Dow Impaxx® 700 foam.   However, Dow Impaxx® 700 pre-cut to the Type 11 shape isavailable for US$150 each plus shipping from BSCI Energy Impact Systems (contact information below).  Pricing and availability are subject to change and are at the sole discretion of BSCI Energy ImpactSystems.  BSCI Energy Impact Systems is not affiliated with SAE International or the Formula SAE Rules Committee. The Type 11 Impact Attenuator is approved for the 2011 FSAE competition season only...