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Old 5th February 2009 | 16:32
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ShyTorque

Avoid imitations
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Bookworm, supercooled water droplets can exist alongside snowflakes. Does that help your understanding? If not, believe what you will, I wish you luck and hope you safely enjoy your cold weather flying in the future. I'm not going to argue the academics or semantics about whether it's academic still snow now or is it academic ice stuck to my aircraft because I know from other discussions here that written debate often can't change a long time fixed belief derived from reading.

A while ago I took part in similar discussion, about carb icing and the possible effects of the use of partial carb heating, other "experienced" pilots couldn't understand the concept that it might be counterproductive not to use FULL heat. One person in particular hadn't realised that fuel evaporation could cause a temperature drop of 20 Celsius in the venturi and believed it was all down to the Bernoulli effect. He's probably still unconvinced.

During another more recent discussion, at least one "experienced" poster said it wasn't possible for helicopters to suddenly cause a highly localised visibility reduction to the point where IMC conditions existed. Until the moderator posted a video showing exactly what I was talking about. He hadn't experienced those weather conditions himself and posted that it therefore couldn't happen...

My own practical experience tells me that some over-generalisations have been stated, especially where operations close to freezing temperatures are concerned. Colder arctic (drier) temperatures can be less dangerous than than those just above or just below freezing, such as in UK of late.

I joined in this debate because I felt concerned that an inexperienced pilot might read what has been posted and assume that falling snow is of little consequence to his winter flight, other than from a reduction in visibility.

I'm not a met expert, only a pilot of some 32 years professional experience, including military winter operations in weather conditions close to (and sometimes unfortunately in) snow and icing conditions. These days, flying an IFR capable aircraft without an icing clearance, I have to draw on my practical experience to keep it safe all year round, while getting the job done whenever possible. Especially as someone previously told the aircraft owner he was buying an all-weather aircraft.

I hope my input has balanced the debate somewhat, others can decide for themselves.

Last edited by ShyTorque; 5th February 2009 at 16:47. Reason: A few typos and some tidying of grammar and prose.
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