"Lonnie" @_#~#@.^net wrote in :


wrote in message
news:ea6628f5-c97a-4d45-814d-1b94063932c3
@k13g2000hse.googlegroups.com...
On Sep 8, 5:11 pm, "Robert M. Gary" wrote:
Well ok. Dry in the sense of visible moisture; yes, no visible
moisture. However, we know that humidy is the key to carb ice so
there
had to be some humidy. But what type of solution is that? You teach
students to subtract the dew point from the temp in order to decide
when to turn off carb heat. That just sounds complicated for little
gain.

It's not complicated. If the temp and dewpoint are 3 or 5 or
8 degrees (Celcius) apart, ice is likely. If they're 25 degrees
apart,
it's not. Anyone can print out the carb ice risk chart (Google "carb
ice") and stick it where it's handy.
Here in Canada, the regs say this:

"602.72 The pilot-in-command of an aircraft shall, before commencing
a
flight, be familiar with the available weather information that is
appropriate to the intended flight."

I would imagine the FAA has something equivalent to that.

So some sort of weather information is mandatory, and that
would include temp and dewpoint. There's no excuse for being
surprised
by carb ice. None at all. Like I tell my students, "You wouldn't dive
into water without making sure there were no hazards in it that might
injure you (hard or sharp pointy things under the surface, predators,
and so on) and that it wasn't one degree above freezing. Why would we
take off into air about which we know nothing?

Dan

You want to argue awareness of conditions to justify dropping carb
heat,
when dropping carb heat is not necessary to solve the OP's issue?


You're an idiot, control freak boi.

Bertie