OK guys; getting off-topic a bit here, also approaching this backwards IMHO. Dive into the books and quote all the numbers you like, but the fact is that it did NOT behave as it should have so I'd be looking at reasons why it DIDN'T not why it should have performed better. Nobody has brought up the old rule: Aviate, Navigate, Communicate. Why is the pilot making Mayday calls a few seconds off the runway when he 'should have' been flying the aeroplane, getting it sorted and then making a PAN call? This guy should not have been panicking at this experience level so he's got more than just a failure of #1 to contend with. This morning I saw a clip on News 24 of a prop being lifted out of the scene. No burn, so likely it's come out of the building, so likely it's from the left engine. It wasn't feathered and was not developing power. Damage was consistent with it windmilling into that roofing iron. That's a starting point for the investigators right there.