"D Ramapriya" wrote in message
...
On Sep 28, 10:00 am, Clark wrote:
D Ramapriya wrote in
news:e238c979-3550-4a59-87f1-
:



On Sep 28, 8:36 am, Clark wrote:
D Ramapriya wrote in
news:2f5fa47a-a9a0-4d76-897e
-
:

Jeez, in most videos I've seen of yours, the stall horn has sounded
just before touchdown. I bet you like hairy landings

Just an educational point: a perfect landing includes a full stall
about
a
foot off the ground. Typically the stall horn will sound about 5 to 10
kn
ots
above the actual stall. Alan's landings appear to be quite good.

In other words, there is no harm in stalling within a few inches of
the
runway. On the other hand, there can be great harm in attempting to
land
way
to fast.

Thanks, mate. Won't this lead to dodgy finals in a situation where the
headwind tails off for some reason (a gust or some such)?

Final is typically flown at 1.3*Vso which translated means 30% above
stall
speed. The extra velocity is lost in the roundout at the bottom of the
approach. If the winds are gusty then 1/2 the gust factor is added to the
approach speed. The gust factor is the difference between the base wind
velocity and the maximum gust velocity.

Folks have been doing this for a long time and the numbers work really
well.


Correct me if I'm wrong but there may also be the possibility that in
aircraft where the computer doesn't correlate data from the AOA
sensor, you'll probably get a slightly slower airspeed indication than
actual during the flare, in which case even the stall horn would be a
kind of false alarm

Ramapriya

Small aircraft do not use any computers to actuate the stall horn. Instead,
there are ports on the leading edge of the wing in a precise location so
that the air moves from one to the other at stall only, which blows a reed
horn, or some have a little flap that blows over at the leading edge that
turns on a switch to sound an electric horn. In either case, it is
aerodynamic airflow that triggers the stall horn.
--
Jim in NC