My 9th Wedding Anniversary Trip, To Newport, OR Carb Ice & Real Engine Out "Long"

NW_PILOT wrote:

is it wise to cruise
with a little bit of carb heat on in the conditions I was in today?

I was taught and have read in several publications that you should always use full
carb heat if you use it at all.

George Patterson
None of us is as dumb as all of us.

"G.R. Patterson III" wrote in message
...
I was taught and have read in several publications that you should
always use full carb heat if you use it at all.

I would agree with that. The only possible exception being when you have a
carb temp gauge and can ensure that partial carb heat produces temperatures
well above freezing.

I don't think there's really any significant advantage to using partial carb
heat, and at altitude there's generally no problem running with carb heat
full on all of the time, if that's what it takes to keep the carb clear.
(Nod to the pedants around he possible exceptions being things like
flying through a cloud of volcanic ash, that sort of thing)

Pete

I like the idea of a carb temp gauge ware can I get one?


"Peter Duniho" wrote in message
...
"G.R. Patterson III" wrote in message
...
I was taught and have read in several publications that you should
always use full carb heat if you use it at all.

I would agree with that. The only possible exception being when you have
a
carb temp gauge and can ensure that partial carb heat produces
temperatures
well above freezing.

I don't think there's really any significant advantage to using partial
carb
heat, and at altitude there's generally no problem running with carb heat
full on all of the time, if that's what it takes to keep the carb clear.
(Nod to the pedants around he possible exceptions being things like
flying through a cloud of volcanic ash, that sort of thing)

Pete

"NW_PILOT" wrote in message
...
I like the idea of a carb temp gauge ware can I get one?

Talk to your mechanic. He'll know where to acquire one, and will have to
install it for you (unless you're an A&P yourself, in which case you
probably already know where to get one ).

I've always wondered about this suggestion? Here's what I'm thinking: If I
fly along and start getting carb ice, generally, I can apply carb heat and
eventually (hopefully) eliminate the condition. At that point, I am aware
that the conditions are conducive to carb ice and take whatever actions I
deem appropriate. BUT,,, IF I have the carb heat on full and I still
manage to ice-up, now I am in a condition that allow me few options to
address - there is no other fall back at that point.

Is there something I'm missing? Is the second scenario I'm describing
impossible? I'd be curious about your thoughts.

--
--
=-----
Good Flights!

Cecil
PP-ASEL
Student-IASEL

Check out my personal flying adventures from my first flight to the
checkride AND the continuing adventures beyond!
Complete with pictures and text at: www.bayareapilot.com

"I fly because it releases my mind from the tyranny of petty things."
- Antoine de Saint-Exupery -

"We who fly, do so for the love of flying. We are alive in the air with
this miracle that lies in our hands and beneath our feet"
- Cecil Day Lewis -
"G.R. Patterson III" wrote in message
...


NW_PILOT wrote:

is it wise to cruise
with a little bit of carb heat on in the conditions I was in today?

I was taught and have read in several publications that you should always
use full
carb heat if you use it at all.

George Patterson
None of us is as dumb as all of us.

"Cecil Chapman" wrote in message
. com...
[...] BUT,,, IF I have the carb heat on full and I still
manage to ice-up, now I am in a condition that allow me few options to
address - there is no other fall back at that point.

If you are in conditions conducive to carb ice without carb heat, then
there's no way for full carb heat to produce a conditon that is still
conducive to carb ice. Conversely, if you get carb ice with the carb heat
full on, you are flying in some pretty cold temperatures and there was no
need for carb heat in the first place.

In any case, the problem with partial carb heat is that, without a carb temp
gauge, you have no way of knowing that you haven't created conditions
conducive to carb ice when none existed previously, or that you haven't
turned conditions only a little conducive to carb ice into conditions that
are very conducive to carb ice.

Pete

Cecil Chapman wrote:

BUT,,, IF I have the carb heat on full and I still
manage to ice-up, now I am in a condition that allow me few options to
address - there is no other fall back at that point.

If you're in conditions where full carb-heat won't prevent carb-ice, what
difference does it make whether you learn that full carb-heat is
insufficient quickly or slowly?

Is there something I'm missing? Is the second scenario I'm describing
impossible? I'd be curious about your thoughts.

That's why I asked whether NW had the heat hot when descending (and never
saw an answer, sadly). I've never had a situation where carb-ice formed
despite the heat being on. But that doesn't preclude the possibility (esp.
since I'm in a very different neighborhood).

I've only recently started flying aircraft that have carb-temp gauges. You
can bet I'll be watching those with some curiosity.

- Andrew

If you're in conditions where full carb-heat won't prevent carb-ice, what
difference does it make whether you learn that full carb-heat is
insufficient quickly or slowly?

What I meant was that one could be flying into gradually increasing severity
of carb ice potential with the carb heat kept full on. That is, there
wouldn't be any initial warning that conditions were becoming conducive to
carb icing. If the heat was off, the very first instance of the least
severe (hopefully) carb ice would begin to occur, before moving further into
a condition that was conducive to even faster carb ice accretion - so
perhaps, one would miss the initial 'warning' of possibly more progressively
severe conditions that were waiting just a little beyond where one was
flying.

--
--
=-----
Good Flights!

Cecil
PP-ASEL
Student-IASEL

Check out my personal flying adventures from my first flight to the
checkride AND the continuing adventures beyond!
Complete with pictures and text at: www.bayareapilot.com

"I fly because it releases my mind from the tyranny of petty things."
- Antoine de Saint-Exupery -

"We who fly, do so for the love of flying. We are alive in the air with
this miracle that lies in our hands and beneath our feet"
- Cecil Day Lewis -

If you're in conditions where full carb-heat won't prevent carb-ice, what
difference does it make whether you learn that full carb-heat is
insufficient quickly or slowly?


I was taught that, in general, if full carb heat brings the carb temp up to a
point of icing, then using NO carb heat will keep the carb cold enough to avoid
icing. I'm not sure this is true however, but in any case, colder air holds
less water.

Jose

--
(for Email, make the obvious changes in my address)

Yep, 100% possible I had carb heat on seemed to clear it up a bit then I
decided to descend and it iced up all the way untill engine out with carb
heat on.

"Cecil Chapman" wrote in message
. com...
I've always wondered about this suggestion? Here's what I'm thinking: If
I
fly along and start getting carb ice, generally, I can apply carb heat and
eventually (hopefully) eliminate the condition. At that point, I am aware
that the conditions are conducive to carb ice and take whatever actions I
deem appropriate. BUT,,, IF I have the carb heat on full and I still
manage to ice-up, now I am in a condition that allow me few options to
address - there is no other fall back at that point.

Is there something I'm missing? Is the second scenario I'm describing
impossible? I'd be curious about your thoughts.

--
--
=-----
Good Flights!

Cecil
PP-ASEL
Student-IASEL

Check out my personal flying adventures from my first flight to the
checkride AND the continuing adventures beyond!
Complete with pictures and text at: www.bayareapilot.com

"I fly because it releases my mind from the tyranny of petty things."
- Antoine de Saint-Exupery -

"We who fly, do so for the love of flying. We are alive in the air with
this miracle that lies in our hands and beneath our feet"
- Cecil Day Lewis -
"G.R. Patterson III" wrote in message
...


NW_PILOT wrote:

is it wise to cruise
with a little bit of carb heat on in the conditions I was in today?

I was taught and have read in several publications that you should
always
use full
carb heat if you use it at all.

George Patterson
None of us is as dumb as all of us.