From: "Peter Duniho"

says Small airplanes don't have flaps that can be extended far enough to
dramatically increase drag.

Manuals or not -- a 40 degree flap, Cessna 172 with her nose held high during
roll out will get the "large" flaps to something like 60 degrees to the air
flow. Try it and see. And it will stop as fast that way as retracting them.
When you can't keep the nose up any longer then go to flaps up and bear down on
the brakes. Now the tiny little Piper flaps may not do much in the area of
drag. Far as I can tell they don't do much of any thing. Oh yeah, something
to round out the check list. That is what Piper put them there for. Back when
Piper built planes for men-----ha ha ha----- like the Pawnee they must of been
thinking of drag cause there ain't much the Pawnee's flaps can do for lift.
Now if someone would put a brake on the nose wheel ya might get some real
braking action---weight transfer and all that. mac