really don't know the # of landings... but I know when I did my PPL in 1978.... solo'd at 10 hours... took my PPL check ride at 43 hours.... passed...

In UPT... solo'd on flight 9 for T-37s ... and about the same for T-38s.. really not much leeway there.. .its in the syllabus... and you are either ready or you bust the ride...recollection is that there was basically a 2 hop window to be ready.... yes we did have some guys who didn't make it and never solo'd.... total class stat's..... 66 started pilot training... 28 graduated.