Shawn,
Thanks for clearing that up, the visual of the ultra-light turning downwind from a crosswind really exemplified the problem, it doesn’t appear so vividly when using bigger airplanes as a model. A 25% loss of airspeed would be 44% degradation in lift. Another thing to put in my bag of tricks. That would be a fun thesis subject... (I thought it may have been Doolittle’s dissertation)