Bob Moore wrote:

I posted that data to refute George's post about "all 172's before
1964" used 20 degrees of flaps.

I did not mean that. What I meant was that any aircraft with manual flaps can
get the shortest ground run by dumping in full flaps just above stall speed and
hopping up into ground effect. All 172s prior to 1964 had manual flaps and can
use this technique.

George Patterson
Give a person a fish and you feed him for a day; teach a person to
use the Internet and he won't bother you for weeks.