On Mon, Jun 23, 2008 at 6:22 PM, jrc <jrccea@bellsouth.net> wrote: > By what mechanism does it reduce drag? > JimC By avoiding turbulent airflux. But I'm not sure if there is much non-aerial activities (specially non-flying ones) that it could help - e.g. ostrich run very fast with symmetrical feathers. []s, Roberto Takata