HMS Courageous (BC-1917)
For this drawing I decided to see how far I could push a 13.5" battlecruiser. Give the ship twelve guns, this would be a 50% increase over the Lion/Tiger types. 32,000 ton standard displacement the same as the Renown class in size. Armour would have been the same 9-10" belt of the earlier ships.
While being a large ship with a good armament, the enty of the 15" gun made it virtually obsolete and the ship would never have got off the drawing board unless some South American country wanted something with lots of guns to match some other 13.5" gunned ship they had to keep the gun size the same. Ease of supply for shells.