Ow ja. Lots of R/C pilots never heard of the Reynolds number. On our flying site a lot of people says they can precisely explain the definition of this parameter, but at the end only one or two guys are really understand the Reynolds number and are capable to explain it. Keeping the large number of well flying model planes in mind, knowledge of the Reynolds number isn't that important for recreational flying and building model planes.

Grtz,

Gerry