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From: Bod on 15 Apr 2010 12:37 On 15/04/2010 17:33, Brimstone wrote: > > > "Bod" <bodron57(a)tiscali.co.uk> wrote in message > news:82otasFtm0U1(a)mid.individual.net... >> On 15/04/2010 17:25, Brimstone wrote: >>> "Bod" <bodron57(a)tiscali.co.uk> wrote in message >>> news:82os2aFk5jU1(a)mid.individual.net... >>>> If the ash cloud is at 55,000 ft, why can't the planes fly at, say, >>>> 40,000 ft instead? >>>> >>> What happens to solid matter in the air? >>> >>> >> >> As I understand it, the news reported that the particles were being >> blown south east and were not falling. >> > Most of it might not be falling, but some has to, unless gravity has > been switched off. > > It's in the Jet Stream at the moment, which as you know, blows at a fair rate of knots (about 100mph). Bod
From: Brimstone on 15 Apr 2010 12:42 "Graham Harrison" <edward.harrison1(a)remove.btinternet.com> wrote in message news:XsOdncaFiMAw3VrWnZ2dnUVZ8kmdnZ2d(a)bt.com... > > "Brimstone" <brimstone(a)hotmail.com> wrote in message > news:cOmdnVc6o-1xoFrWnZ2dnUVZ8tWdnZ2d(a)bt.com... >> "Bod" <bodron57(a)tiscali.co.uk> wrote in message >> news:82os2aFk5jU1(a)mid.individual.net... >>> If the ash cloud is at 55,000 ft, why can't the planes fly at, say, >>> 40,000 ft instead? >>> >> What happens to solid matter in the air? >> >> > > I believe the ash is actually at between 20 and 30k feet although the > maximum reported height has been 55k. Most jets operate at between 25k > and 41k so they're actually going to be in the ash band or have to get > through it neither of which is a good idea for aircraft. exactly.
From: Bod on 15 Apr 2010 12:45 On 15/04/2010 17:36, Graham Harrison wrote: > > "Brimstone" <brimstone(a)hotmail.com> wrote in message > news:cOmdnVc6o-1xoFrWnZ2dnUVZ8tWdnZ2d(a)bt.com... >> "Bod" <bodron57(a)tiscali.co.uk> wrote in message >> news:82os2aFk5jU1(a)mid.individual.net... >>> If the ash cloud is at 55,000 ft, why can't the planes fly at, say, >>> 40,000 ft instead? >>> >> What happens to solid matter in the air? >> >> > > I believe the ash is actually at between 20 and 30k feet although the > maximum reported height has been 55k. Most jets operate at between 25k > and 41k so they're actually going to be in the ash band or have to get > through it neither of which is a good idea for aircraft. > > Ok, why not fly at about 10,000 ft temporarily? The particles are apparently too light to fall from the Jet Stream(according to the news reports). Bod
From: Harry Bloomfield on 15 Apr 2010 13:31 Bod expressed precisely : > Ok, why not fly at about 10,000 ft temporarily? > The particles are apparently too light to fall from the Jet Stream(according > to the news reports). Because it will cost considerably more fuel to fly at that level and aircraft make use of the jetstream to reduce journey times plus fuel costs. -- Regards, Harry (M1BYT) (L) http://www.ukradioamateur.co.uk
From: Bod on 15 Apr 2010 13:34
On 15/04/2010 18:31, Harry Bloomfield wrote: > Bod expressed precisely : >> Ok, why not fly at about 10,000 ft temporarily? >> The particles are apparently too light to fall from the Jet >> Stream(according to the news reports). > > Because it will cost considerably more fuel to fly at that level and > aircraft make use of the jetstream to reduce journey times plus fuel costs. > > But nowhere near as much as it would cost, if not flying at all. Bod |