"Reviewing the A40 Through The C90". Excellent overview article here from the March 2011 issue of the journal of the EAA, Sport Aviation magazine:
http://acversailles.free.fr/documen...Moteur/CONTINENTAL/The_small_Continentals.pdf
http://acversailles.free.fr/documen...Moteur/CONTINENTAL/The_small_Continentals.pdf