Graph (image) American Institute of Physics Caption In the presence of a strong gust (30 percent from left to right), both leading and trailing edge vortices were observed during downstroke at a Reynolds number of 1400 (Strouhal number = 0.28). Credit Courtesy: New Mexico State University. Usage Restrictions This image may be used by reporters so long as they acknowledge the source. Courtesy: New Mexico State University. 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.