Aero Vintage Books

Posted: **Fri Feb 14, 2014 12:01 am**

When did the Sperry Ball turret go from internal ammo to the external Ammo bins?

Posted: **Fri Feb 14, 2014 7:33 am**

Good question!

I believe it was during the B-17G model run,
but at what block the change occurred
will take a little research to find.

Ball Turret Internal to external ammo storage?