Weight, APU & props
Well JW411 guess our paths obviously crossed, I went out to K'Sar & Nairobi early March with the 2 trial aircraft XN847 & XN849 carrying out the hot & high before then going out with 105 for my holiday, sorry tour, agreed the APU was a brilliant bit of kit but you obviously never had to change one in the Aden heat, I did & being stuck up the boom in the afternoon heat was not a pleasant place to be, what's this bit about the Flight Eng being able to fix problems, usually found them issuing instructions from the cool of the mess whilst us real engineers fixed the faults.
Also re the props & reversing, as I remember from prop changes we set the prop angle before putting the dome back on (don't remember the actual angle) to Ground Fine Pitch (always known as Discing !) our (105's) Argosies definitely didn't have a reverse facility, maybe the ability to was available but not used ????.
Regards, PH.