Here are some screenshots of some of the airfields I've made for Microsofts CFS3 (though not all of the models are mine). They represent them as they would have been in 1940.
It's not possible to get the same definition of the runways etc as it is in fs9 but with the combat sims you can fly in formation, re-create historical missions and have a crack at Harry Hun!
This ones not 1940! USAAF Harrington