pdf version of Allied Wings 6 now available

A pdf and revised version of the book Allied Wings #6 (Grumman FF) is now available for download, meaning that all the books on USN aircraft of this Allied Wings series are now all available on pdf (AW03/Northrop BT-1, AW06/Grumman FF, AW11/Curtiss F11C-BFC & BF2C, AW15/Grumman SF)