On Dec 17, 1:05*pm, "Ken S. Tucker" wrote:
On Dec 17, 7:40 am, "Terry" wrote:



"Robert Moore" wrote in message

85.247...

"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)

Hi Bob

Your correct in every aspect. *I know what my airplane is capable of
at or near gross. I know that I can climb at 30 degrees of flaps but
not the 40 degrees that my C150 has. I was just trying to put some
general guidelines into winter flying with an underpowered 100hp
engine. *I don't know if a new student or experience pilot such as
yourself is reading this newsgroup. * *Have a nice Holiday Bob.
Terry N6401F

I flew a Cessna 150 that had 40 deg flap, which was a hoot,
the 152 only had 30 deg flaps.
Though I've never had a flap problem I'll add that under some
weather conditions, a cold a/c decending into humid air will
frost up, I feel that could freeze the flaps.
Ken

Frost is a phenomenon that forms only in still air. And it
wouldn't freeze the flaps. For frost to form, the aircraft surface
cools through radiative cooling to below the air temperature when the
dewpoint and temp are really close. When there's much wind the
aircraft surface is kept at air temp through convection. Some old
pilots used to burn off light frost just by taking off. That's now
illegal in Canada.

Ice, on the other hand, can form in flight but that flight has to
be into fog or cloud or rain consisting of supercooled water droplets,
which are below the freezing point but still liquid. Water can exist
as a liquid down to -20°C. The airplane's surface will be below
freezing because of the air temp, and any change in air temp will
change the very light aircraft structure's temperature quickly.

Dan