Aerofiles: Great reference and research site for old airplanes, especially N numbers, S/Ns and type data . The amount of info on this site is very impressive.

Staggerwing Museum: Visit the Staggerwing Museum to keep up to date on these great planes.

Great Lakes: A great site for Great Lakes history and photos.

Hatz Site: A very large site full of information on every detail of the Hatz Biplane.

Stearman: Visit the Stearman Restorers Association.

Barnstormers: Visit the great land of free airplane classifieds. Lots of old stuff listed.

Trade-a-Plane: Visit the great land of more costly classifieds.

Waco Club: Visit a very good site that links together everything WACO including volunteer experts w/phone numbers on many antique specialties. .