A aviation & planes forum. AviationBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » AviationBanter forum » rec.aviation newsgroups » Piloting
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Cold weather ops



 
 
Thread Tools Display Modes
  #1  
Old February 4th 04, 11:33 PM
Happy Dog
external usenet poster
 
Posts: n/a
Default Cold weather ops

Many GA a/c are restricted to operations above a certain temperature. In my
case (Zlin 242L) the restriction is -20C at sea level and goes down to -40 C
(or F) at 9000 feet. But, the POH doesn't say why. Anybody know?

moo


  #2  
Old February 5th 04, 01:13 AM
Rosspilot
external usenet poster
 
Posts: n/a
Default

Many GA a/c are restricted to operations above a certain temperature. In my
case (Zlin 242L) the restriction is -20C at sea level and goes down to -40 C
(or F) at 9000 feet. But, the POH doesn't say why. Anybody know?


Yes. Any colder than that and you freeze your ass off, moving the CG too far
forward and out of the operating envelope.
G


www.Rosspilot.com


  #3  
Old February 5th 04, 02:22 AM
Mike Rapoport
external usenet poster
 
Posts: n/a
Default

It could be all kinds of things. My airplane has high and low start
restrictions and an absolute temperature limit. The start restrictions are
based on the possibility/probablility of a hot start and the absolute
temperature limit is based on the fuel gelling.

Mike
MU-2


"Happy Dog" wrote in message
. ..
Many GA a/c are restricted to operations above a certain temperature. In

my
case (Zlin 242L) the restriction is -20C at sea level and goes down to -40

C
(or F) at 9000 feet. But, the POH doesn't say why. Anybody know?

moo




  #4  
Old February 5th 04, 05:08 AM
Steve Chalfin
external usenet poster
 
Posts: n/a
Default

"Happy Dog" wrote in message ...
Many GA a/c are restricted to operations above a certain temperature. In my
case (Zlin 242L) the restriction is -20C at sea level and goes down to -40 C
(or F) at 9000 feet. But, the POH doesn't say why. Anybody know?

moo


A recent thread on the Diamond Owners Website addressed the -20 degree
C limitation for the Diamond Star. According to Diamond, this is due
to temperature limitations on the avionics.

Steve
  #5  
Old February 5th 04, 07:50 AM
Happy Dog
external usenet poster
 
Posts: n/a
Default

"Steve Chalfin" wrote in message
Many GA a/c are restricted to operations above a certain temperature.

In my
case (Zlin 242L) the restriction is -20C at sea level and goes down

to -40 C
(or F) at 9000 feet. But, the POH doesn't say why. Anybody know?


A recent thread on the Diamond Owners Website addressed the -20 degree
C limitation for the Diamond Star. According to Diamond, this is due
to temperature limitations on the avionics.


Yeah. I've heard this. But why the change with altitude?

moo


  #6  
Old February 5th 04, 12:15 PM
Dylan Smith
external usenet poster
 
Posts: n/a
Default

In article , Happy Dog wrote:
A recent thread on the Diamond Owners Website addressed the -20 degree
C limitation for the Diamond Star. According to Diamond, this is due
to temperature limitations on the avionics.


Yeah. I've heard this. But why the change with altitude?


At a rough guess, because at sea level you're likely to be just starting
out so everything's cold at that point. At 9000' you're flying, the
engine's hot, and you can provide enough heat to prevent the avionics
from going out of spec until a colder temperature.

--
Dylan Smith, Castletown, Isle of Man
Flying: http://www.dylansmith.net
Frontier Elite Universe: http://www.alioth.net
"Maintain thine airspeed, lest the ground come up and smite thee"
  #7  
Old February 5th 04, 03:18 PM
Doug
external usenet poster
 
Posts: n/a
Default

Deice fluid freezes if the temp gets low enough (below about -40 but
check this). Flaps wont come up due to being frozen etc.

"Mike Rapoport" wrote in message thlink.net...
It could be all kinds of things. My airplane has high and low start
restrictions and an absolute temperature limit. The start restrictions are
based on the possibility/probablility of a hot start and the absolute
temperature limit is based on the fuel gelling.

Mike
MU-2


"Happy Dog" wrote in message
. ..
Many GA a/c are restricted to operations above a certain temperature. In

my
case (Zlin 242L) the restriction is -20C at sea level and goes down to -40

C
(or F) at 9000 feet. But, the POH doesn't say why. Anybody know?

moo


  #8  
Old February 5th 04, 03:33 PM
G.R. Patterson III
external usenet poster
 
Posts: n/a
Default



Dylan Smith wrote:

At 9000' you're flying, the
engine's hot, and you can provide enough heat to prevent the avionics
from going out of spec until a colder temperature.


There are airports higher than that in the States, so I doubt that's the reason.

George Patterson
Love, n.: A form of temporary insanity afflicting the young. It is curable
either by marriage or by removal of the afflicted from the circumstances
under which he incurred the condition. It is sometimes fatal, but more
often to the physician than to the patient.
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
FA: WEATHER FLYING: A PRACTICAL BOOK ON FLYING The Ink Company Aviation Marketplace 0 November 5th 03 01:07 AM
Cold Weather Flying Jose Vivanco Owning 27 October 16th 03 11:27 AM
Eurofighter - useless in cold weather and fog? Peter Kemp Military Aviation 9 September 13th 03 04:37 AM
XMRadio Satellite Weather Has Arrived Richard Kaplan Piloting 37 September 2nd 03 02:51 PM
And they say the automated Weather Station problems "ASOS" are insignificant because only light aircraft need Weather Observations and forecasts... Roy Piloting 4 July 12th 03 04:03 PM


All times are GMT +1. The time now is 10:53 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 AviationBanter.
The comments are property of their posters.