PIK 20e landing flap.

[john firth]

after losing roll control in the 20E ontouch down, ( in a gustry X wind) I am going to lock out the 16 deg landing flap;  it reduces stall speed  by a couple of knots max,

but makes response time and aileron drag much worse, so much so that 

the rudder can barely control yaw at 50 kts and full aileron.

I cannot understand why the extra 4 deg was designed in.

am I missing something here?

cheers

to all

John firth