Download or read book Double Lap Shear Testing of Coating Modified Ice Adhesion to Liquid Oxygen Food Line Bracket, Space Shuttle External Tank written by and published by . This book was released on 2006 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: The brackets that secure the liquid oxygen feed line to the external tank are known locations of frost and ice growth during the period following fuel loading. This experiment quantified the reduced adhesion when ice phobic coating were applied to test coupons simulating the bracket surface. Double lap shear testing of coated and uncoated coupons provided robust test specimens and consistent load response patterns with exceptional resolution. For these tests ice was grown as strong and consistently as possible, subject to temperature decreases comparable to those of the prototype bracket, and tested at a controlled temperature of -112 degrees C. The tests evolved in three phases, with uncoated controls included in each group of tested samples. The first phase of testing evaluated a wide range of coatings, and showed that Rain-X mixed with MP-55 powdered Teflon (RXM) was outstanding coating to reduce ice adhesion to Koropon coated aluminum.