Ice Falling from Aircraft?

[fireflybob]

Sorry if this is in the wrong section, Danny, but I need help with a competition question - this could mean a free holiday in St Lucia!!
Can anyone help with this?
Why might visitors to Kew Gardens last April have considered wearing hard hats?
Be grateful for any references to back up any answers - thanks all!


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[PPRuNe Towers]

As Bob didn't mention sharing the winnings with the sad, pale UV deprived figure of our heroic leader this query is off to the Questions forum.

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Regards from the Towers

[email protected]

[HPSOV]

I'm not sure if this is what you mean but here goes anyway.
If an aircraft has been cruising along for hours at altitude where the temperature is as low as -60 then it follows that you are going to have a very cold aircraft with very cold fuel in the tanks.
When this aircraft descends into a humid area (mainly talking places like Bangkok and HongKong etc) large sheets of ice can form on the fuselages and wings.
If you look at the ILS chart for Narita Tokyo it is a requirement to lower the gear before crossing the coast so that any ice dislodged by the gear doors does not fall on the houses.
Heard stories of pilots doing walkarounds and being hit by falling ice.

[old-timer]

I think the question is most likely
relevent to 'blue ice'
this is ice formed on the 'fuse'
from leakage, from the lav' service panels;
basically; the lav' service panels are
valves where the 'honey' carts
(pooh wagons) connect to on the ground,
they should be fully sealed for flight,
but often leak a bit, causinjg 'blue ice'
down the 'fuse'
this falls off, as the airframe warms in the lower altitudes & falls onto places such as
Kew Gardens !!!
(actually very dangerous really)


keep those hard hats on !!!!!




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So much sky,
so little time :-(
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[Dan Winterland]

Coconuts?