"Terry" wrote
I know my C150 will fly with 20 degrees of flap.
With 20 I can arrest the descent and climb out.

In fact Terry, FAR Part 23 requires that your aircraft and all of the
Cessna 150/152/172 series be able to execute a go-around at the maximum
flap setting at the maximum TOGW. This requirement is what actually sets
the maximum TOGW for these aircraft.
Several years back, Cessna was able to raise the Maximum TOGW of the C-
172 by 100 lbs by simply removing the 40 degree flap setting.

Section 23.77: Balked landing.
(a) Each normal, utility, and acrobatic category reciprocating engine-
powered airplane at 6,000 pounds or less maximum weight must be able to
maintain a steady gradient of climb at sea level of at least 3.3 percent
with-

(1) Takeoff power on each engine;

(2) The landing gear extended;

(3) The wing flaps in the landing position, except that if the flaps may
safely be retracted in two seconds or less without loss of altitude and
without sudden changes of angle of attack, they may be retracted; and

(4) A climb speed equal to VREF, as defined in 23.73(a).


Bob Moore, ATP CFI
PanAm (retired)