Originally Posted by
phlpsfrnk
I'm partial to this chart myself, although developed for glider pilots it provides more information and is still valid.
I believe it is 60,000 feet where class G begins again above class A.
Regards
Frank
I forgot to mention that it is not 100 percent either. But I can see here, that the level heads understand that. Just as an example, one of the fields I fly at, we are marked on the navigation sectionals as class D airspace around the field. That helps buffer us flying our models from two airports that the field is in between.