Testing drag sail deployment (IMAGE) Purdue University Caption Purdue Ph.D. candidate Arly Black (front) and lab engineer Anthony Cofer test sail deployment for Spinnaker3. Credit Purdue University image/David Spencer Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.