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raymondj(at)frontiernet.n
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 Posted: Thu Feb 10, 2011 10:01 am Post subject: Pitot heat- but off topic |
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do not archive
Any thoughts on the idea of flying around in clear air for some period
after an icing encounter with the intent of decreasing the amount of ice
on the aircraft before trying to land? Sufficient fuel, etc.
Raymond Julian
Kettle River, MN
On 02/10/2011 10:37 AM, Robert L. Nuckolls, III wrote:
| Quote: |
<nuckolls.bob(at)aeroelectric.com>
> So assume Captain Super Stud realizes that his stall speed is affected,
> and elects to maintain 90 kts on final because he is able to fly the
> plane at 90kts (he just tested this on the downwind leg). Could he do
> this without a working airspeed indicator?
<snip>
> Better to do a quick
> comparison prior to pattern entry of the airspeed indicator to the GPS
> indicated speed to make sure it is working, and then use the normal
> instruments for landing to reduce pilot workload.
Is that your advice to the 200 hr VFR pilot? Put
on your CFI hat. Consider that the things we're
taught in the 40-hr holy-watered curriculum are
the things that work 100% of the time based on
panel displays and views out the window that
are not contaminated by an un-calibrated tightening
of the airplane's performance envelope.
It's much easier to hypothesize a course of
action based on our personal experiences and
understanding of how things work. But how would
you advise a pilot with an extension to that
40 hr curriculum? How would you demonstrate
a process and then test the student for competency
to carry out that process?
How about: No pattern flight. No impromptu "flight
testing". Straight in. Keep nose well below horizon.
If you cross the numbers at 100+kts (GPS or IAS) the
probability of a controlled arrival with the concrete
is high. Now the skill to be cultivated is directional
control during a higher speed roll out. Do you
NEED a working speed indicator to accomplish this
maneuver?
Which thought process and procedure has the
highest likelihood of a comfortable outcome?
I don't think anyone proposes to discourage anyone
from having pitot heat or any other gee-whiz.
The goal is to QUANTIFY the risk-reduction value
for having a heated pitot.
Bob . . .
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nuckolls.bob(at)aeroelect
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| Posted: Thu Feb 10, 2011 6:30 pm Post subject: Pitot heat- but off topic |
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At 12:57 PM 2/10/2011, you wrote:
| Quote: |
do not archive
Any thoughts on the idea of flying around in clear air for some
period after an icing encounter with the intent of decreasing the
amount of ice on the aircraft before trying to land? Sufficient fuel, etc.
|
Absolutely. Ice will sublimate (evaporate directly)
under the influence of flight winds. You can also
seek higher temperatures which further enhances
shedding. I think MOST icing encounters don't bring
iced airplanes all the way to the runway.
But I do recall pictures in Flying (or similar mags)
showing amazing collections of mixed ice on the leading
edges of just-arrived aircraft. It's a sure bet that
this guy's arrival wasn't a gracefully executed,
nose high, 3-point flare aided and abetted by
an accurately calibrated and trustworthy airspeed
display.
Bob . . .
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