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Batteries and icing

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Old 4th January 2009 | 18:55
  #21 (permalink)  
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What sort of bo**ocks is that?

Just because the temperature is 0. Doesn't mean you are in icing condiitons. I assume you've been up at altitude on a summers day. Ever noticed what the OAT gauge might be reading.

Good grief!
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Old 4th January 2009 | 19:04
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Errr. No. I have a feeling I might understand the concept of icing and it's definition.

So Icing conditions are purely to do with temperature are they?
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Old 4th January 2009 | 19:07
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From: An island somewhere
I suggest you go and read up old chum
I'd like to. Any chance of a relevant reference?
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Old 4th January 2009 | 19:12
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Wait untill the ambient air tempreture rises enough to melt the ice.

If the temp is 0c or below, you should not fly as you are in icing conditions. Simple as that!
Ice doesn't melt in a hurry even when the temp is way above 0 degrees. You have to have moisture to form ice else all our little aircraft would be hurtling earthwards when the OAT was below zero. Today that would have been at less than 1000 feet. Everyone was flying today - no one came to grief!

Too much Champagne me thinks, mate.
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Old 4th January 2009 | 19:19
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Oh dear. How about you think about what you are posting and I'll just use the definitions that are correct.

If you can't back up a statement, don't make it.
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Old 4th January 2009 | 19:26
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From: Hebra Outerdies
It seems that the lunatics are running the asylum.

If this is your response to a question, which you clearly have little or no knowledge of then why ask in the first place?

I thought the Muppet show ended years ago... I obviously was wrong! All the cast are alive and well in the private flying forum!
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Old 4th January 2009 | 19:31
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Maybe if we ignore him he'll just go away
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Old 4th January 2009 | 19:33
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Im not going to do the work for you.
Guess we'll just have to accept your superior knowledge then!

If the temp is 0c or below, you should not fly as you are in icing conditions. Simple as that!
Oh b*gger, if only you'd let us know that thirty years ago, I for one would have turned out to be a responsible pilot!
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Old 4th January 2009 | 19:36
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It seems that the lunatics are running the asylum.

If this is your response to a question, which you clearly have little or no knowledge of then why ask in the first place?

I thought the Muppet show ended years ago... I obviously was wrong! All the cast are alive and well in the private flying forum!
Priceless. It is possible that there are people on this forum who do have a wee bit of knowledge. Some of us even fly for a living too.

I promise you. I'm not worried about my level of knowledge on this subject.
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Old 4th January 2009 | 19:39
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I doubt very much that robin was daft enough to go flying with frost on the wings.

A few lines on a website that could mean anything, don't make someone a fool or a bad pilot.

Get a bit of a grip please and don't go down the idiotic route of hanging and drawing someone due to comments on here about a situation you weren't part of and have absolutely no knowledge of.
Thank you SAS
As it happens it was not an open water crossing. The frost was only on the wings for a very short time and disappeared quickly in flight. I would never have made the trip if I was at all concerned about airframe icing and carb icing was never a problem.

Being a natural-born coward I probably have less desire to put myself at risk than many and will (and have) abandon(ed) flights if I am not convinced it is safe to continue.
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Old 4th January 2009 | 19:41
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You took off with frost on the wing though.....................
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Old 4th January 2009 | 19:49
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Shame some of the comments are being deleted so quickly, as there's clearly a large gap in knowledge here. Maybe a gap I could've addressed today: flying with a reasonably high aspect & thus critical wing in -5 or so. Or maybe a few weeks ago, across the Irish Sea at FL105 on a lovely winter's morning with an OAT of -18? Both utterly clear of ice on the wings or the engine intake, and with a piston engine cleared down to fuel temps of -30 on Jet A-1. Or a couple of times getting through cumulus clouds at rather higher OATs with anti-icing systems switched on to control the buildup of ice and allow me to get to clearer air - in a twin rather than a single, fortunately.

Icing conditions are not purely defined by temperature - it does take a certain amount of humidity to actually create the ice.
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Old 4th January 2009 | 19:53
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Are you saying that you need both cold temperature and moisture to form ice?

Well blow me down with a feather!!
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Old 4th January 2009 | 20:08
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Are you saying that you need both cold temperature and moisture to form ice?
Welllllll, it's only a guess from the last few years flying in UK winters with no ice Shame some people need prompting to make them think. Just like the people who assume that commuting in -6 on 2 wheels means an automatic death wish, or that a balmy summer's day means no carb heat checks are required. Ah well...
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Old 4th January 2009 | 20:15
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Couldn't agree with you more!
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Old 4th January 2009 | 20:23
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a little more aviation...
 
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There's something rather amiss with this thread - as has been noted, so many posts have been deleted it makes it very difficult to get any sense of context. For whatever reason, the Pprune forum software no longer supports the 'quote' button which provided an easy means of quoting an existing post, complete with attribution; however, for future reference, opening a manually crafted quote with quote=Username will at least provide the attribution, but still means you have to manually cut and paste whatever muppetry has boiled your wee for it to make any sense.

It was, however, distinctly brass monkeys this morning. My cunning plan of priming the Pitts and then allowing *three* minutes for the fuel to evaporate initially worked a treat as it started immediately, but then my fundamental Baldrick nature kicked in, opened the mixture too quickly, rich cut, splutter, stop, and that was all the battery had to offer. The Yak started without much protest, but de-icing the airframe was like de-icing my freezer - I only do it once a year, it takes sodding hours and all the crap that was nicely deep frozen mysteriously transfers itself to my clothing.

Still, I did manage to aviate three days in a row, a decent enough way to round off the Christmas and New Year break. Office tomorrow....on reflection, it still be rather de-icing the Yak than stuck in an office in Slough.
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Old 4th January 2009 | 20:31
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Excellent - it gets scary sometimes how many misconceptions are out there, whether from people being lucky once (a PPL reval stude who attempted to barrel roll a PA28 on me, on the grounds that he'd messed up an unusual attitude recovery badly enough once that the FI he was with decided to continue the roll round, so it must be a safe manoeuvre), or simply those who take caution to a level that actually reduces their own safety (those on this thread who would probably descend close to terrain/down a valley to escape freezing temps on a clear day!). Sadly, there's a limit to how much people who don't want to listen can be educated. The reasons for why they won't listen are a whole different thread though!
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Old 4th January 2009 | 20:31
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I'm surprised you have a freezer eharding. I fail to understand how even the smallest morcel of food would survive long enough in your house to be frozen. May I suggest you throw out the freezer and in it's place install a heated hangar for your pitts?
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Old 4th January 2009 | 20:59
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Originally Posted by eharding
There's something rather amiss with this thread - as has been noted, so many posts have been deleted it makes it very difficult to get any sense of context. For whatever reason, the Pprune forum software no longer supports the 'quote' button which provided an easy means of quoting an existing post, complete with attribution; however, for future reference, opening a manually crafted quote with quote=Username will at least provide the attribution, but still means you have to manually cut and paste whatever muppetry has boiled your wee for it to make any sense.
An even better technique is to hit the REPLY button on the post which has 'boiled your wee' and you will get something like this in your browser address bar
http://www.pprune.org/newreply.php?d...7697&noquote=1


now just replace the noquote=1 with noquote=0, hit enter and voilą you have your quote!
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Old 4th January 2009 | 21:09
  #40 (permalink)  
 
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From: The front end and about 50ft up
If the temp is 0c or below, you should not fly as you are in icing conditions. Simple as that!
No airliner would ever fly anywhere if that was true (apart from low level hops around the tropics)! There's a bit more to icing conditions than that which has been quoted.
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