On Sun, 06 Oct 2013 15:28:36 +0100, Syke
wrote:

Very interesting, especially as the 3-view drawing shows a mix of 3 and
4-blade props. I wonder why this would be?

Regards

Syke


As Szalay pointed out, the 4 bladed props were reversible pitch. I
believe this was done for maneuverability while taxiing.