Today's Message Index:
----------------------
1. 03:38 PM - 'Tis the Season' Reminder (Dennis Thate)
2. 04:28 PM - Re: 'Tis the Season' Reminder (Phil)
3. 04:44 PM - Re: 'Tis the Season' Reminder (Dana Hague)
4. 04:44 PM - Re: 'Tis the Season' Reminder (Dana Hague)
5. 04:52 PM - Re: 'Tis the Season' Reminder (Larry Cottrell)
Message 1
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| Subject: | 'Tis the Season' Reminder |
The temperature-dew point spread tells a pilot how close the air is to being 100%
saturated, Fortunately old wise men 503 Rotax pilots rarely fly in such conditions.
There seems to be a general consensus that two strokes gas /oil mixtures are invincible
to icing, if you have the BING 54 carbs on your two stroke 503 as most
Kolb Firestar pilots have they are not as prone to carb icing, because it works
with a piston and not a valve as most other carbs do so most ice that will
be formed will by design be sucked into the engine, and heated up to melt down
preventing the carb piston itself from freezing in a fixed position.
The highest probability for carb icing is during a long decent. It's good General
Aviation airmanship to add carb heat and clear the throttle at intervals during
a glide approach, keep the power up, and remain with gliding distance of
good fields until you get home and don't reduce power until you are sure you can
make the field.
Fly Safe, stay revved up !
--------
Both optimists and pessimists contribute to our society. The optimist invents
the airplane and the pessimist the parachute. ~Gil Stern
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=385941#385941
Message 2
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| Subject: | Re: 'Tis the Season' Reminder |
I wonder what risks a diaphragm carb suffers with carb ice? ( I.e. a Tillot
son ) At least there's no slide to stick. Perhaps just reduced air intake,
resulting in higher oil-to-fuel ratio?
Assuming the whole throat doesn't fill up with ice, does that mean fouled p
lugs are the biggest problem?
Phil H
FF11-4-76
--- On Wed, 10/24/12, Dennis Thate <retroman@frontier.com> wrote:
From: Dennis Thate <retroman@frontier.com>
Subject: Kolb-List: 'Tis the Season' Reminder
The temperature-dew point spread tells a pilot how close the air is to bein
g 100% saturated, Fortunately old wise men 503 Rotax- pilots rarely fly i
n such conditions.
There seems to be a general consensus that two strokes gas /oil mixtures ar
e invincible to icing, if you have the BING 54 carbs on your two stroke 503
as most Kolb Firestar pilots have they are not as prone to carb icing, bec
ause it works with a piston and not a valve as most other carbs do so most
ice that will be formed will by design be sucked into the engine, and heate
d up to melt down preventing the carb piston itself from freezing in a fixe
d position.
The highest probability for carb icing is during a long decent. It's good G
eneral Aviation airmanship to add carb heat and clear the throttle at inter
vals during a glide approach, keep the power up, and remain with gliding di
stance of good fields until you get home and don't reduce power until you a
re sure you can make the field.
Fly Safe, stay revved up- !
--------
Both optimists and pessimists contribute to our society.- The optimist in
vents the airplane and the pessimist the parachute.- ~Gil Stern
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=385941#385941
le, List Admin.
Message 3
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| Subject: | Re: 'Tis the Season' Reminder |
At 06:37 PM 10/24/2012, Dennis Thate wrote:
>
>There seems to be a general consensus that two strokes gas /oil mixtures
>are invincible to icing, if you have the BING 54 carbs on your two stroke
>503 as most Kolb Firestar pilots have they are not as prone to carb icing...
... but it still can happen. I have had two engine failures that I can
only attribute to icing... no other apparent cause, very close temperature
and dewpoint. In my case it's a Mikuni, but that's very similar to a
Bing. I was lucky, in both cases I was able to restart, but I was sure
picking landing fields!
-Dana
--
The most exciting phrase to hear in science, the one that
heralds new discoveries, is not Eureka! (I found it!) but rather,
'hmm.... that's funny...'
--Isaac Asimov
Message 4
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| Subject: | Re: 'Tis the Season' Reminder |
At 07:28 PM 10/24/2012, Phil wrote:
>I wonder what risks a diaphragm carb suffers with carb ice? ( I.e. a
>Tillotson ) At least there's no slide to stick. Perhaps just reduced air
>intake, resulting in higher oil-to-fuel ratio?
In a traditional carb, ice tends to build up on the butterfly, so I assume
it would be the same with a Tillotson or Walbro. The oil in the mix and
slight puffback of a 2-stroke I think is the main thing that helps us, not
the fact that the Bings are slide carbs.
-Dana
--
The most exciting phrase to hear in science, the one that
heralds new discoveries, is not Eureka! (I found it!) but rather,
'hmm.... that's funny...'
--Isaac Asimov
Message 5
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| Subject: | Re: 'Tis the Season' Reminder |
One of the rules that I have adopted from my Light Sport instructor was to
not fly if the dew point is within 6 degrees of temps. Easy to do, worth
doing.
Larry
On Wed, Oct 24, 2012 at 5:31 PM, Dana Hague <d-m-hague@comcast.net> wrote:
> At 06:37 PM 10/24/2012, Dennis Thate wrote:
>
>
> There seems to be a general consensus that two strokes gas /oil mixtures
> are invincible to icing, if you have the BING 54 carbs on your two stroke
> 503 as most Kolb Firestar pilots have they are not as prone to carb icing...
>
>
> ... but it still can happen. I have had two engine failures that I can
> only attribute to icing... no other apparent cause, very close temperature
> and dewpoint. In my case it's a Mikuni, but that's very similar to a
> Bing. I was lucky, in both cases I was able to restart, but I was sure
> picking landing fields!
>
> -Dana
>
>
> --
> The most exciting phrase to hear in science, the one that
> heralds new discoveries, is not Eureka! (I found it!) but rather,
> 'hmm.... that's funny...'
> --Isaac Asimov
>
> *
>
> *
>
>
--
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address before sending.*
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