[NSRCA-discussion] Attention Commercial Full Scale Pilots

[Scott Smith]

A little late to the party but from my A&P days...

De-Icer - Removes accumulated ice (i.e. pneumatic boots on leading edges)
Anti-Ice - Prevents accumulation (i.e. bleed air or weeping alcohol)

De-Icing Fluid (as in on the tarmac) is heated fluid that will melt any
accumulation and slow any build-up before departure on the horizontal
surfaces.  Does nothing once the aircraft is airborne.

Electric boots on the props are referred to as de-ice but can also serve as
anti-ice.  Pneumatic de-icers are problematic because moisture can build up
in the lines then freeze (just when you needed them most!)  The boots are
held tight to the L/E by vacuum and any holes in the boot allow water to
enter when flying through precipitation.






On Sat, Dec 5, 2015 at 2:34 PM, Daniel Dupont via NSRCA-discussion <
nsrca-discussion at lists.nsrca.org> wrote:

> De-icer Booth would be on smaller airplanes….like king air…size, was also
> used a lot in 50’s design, its a very limited system in term of how much
> ice it can take…..
>
> Since it has to accumulate ice before engaging it….there’s a risk of roll
> off…..meaning the ice might get being the booth if the precipitation are
> too much for the system to handle, the bleed air is the prefer method, will
> handle a lot of ice….
>
> Daniel iMac
>
> From: NSRCA-discussion <nsrca-discussion-bounces at lists.nsrca.org> on
> behalf of Randy Forbus via NSRCA-discussion <
> nsrca-discussion at lists.nsrca.org>
> Reply-To: Randy Forbus <Rforbus at hotmail.com>, General pattern discussion <
> nsrca-discussion at lists.nsrca.org>
> Date: Saturday, December 5, 2015 at 14:21
> To: Ron Hansen <rcpilot at wowway.com>, General pattern discussion <
> nsrca-discussion at lists.nsrca.org>
> Subject: Re: [NSRCA-discussion] Attention Commercial Full Scale Pilots
>
> Most all commercial aircraft have wing deice system a heated leading edge
> that works off bleed air,or deice boots, which inflates to break off any
> ice build up
>
>
> ------------------------------
> *From:* NSRCA-discussion <nsrca-discussion-bounces at lists.nsrca.org> on
> behalf of Ron Hansen via NSRCA-discussion <
> nsrca-discussion at lists.nsrca.org>
> *Sent:* Saturday, December 5, 2015 7:08 PM
> *To:* NSCRA Discussion List
> *Subject:* [NSRCA-discussion] Attention Commercial Full Scale Pilots
>
>
> I have a couple of questions regarding de-icing of full scale commercial
> jets.  I’m trying to prep for being an expert witness on an environmental
> matter related to de-icing.
>
>
>
> Is the purpose of the de-icing fluid just to knock off the ice prior to
> take off or is it also intended to remain on the plane during flight?
>
>
>
> Do commercial jets contain any other mechanism for preventing or stopping
> ice buildup during flight (e.g., heating elements)?
>
>
>
> I always assumed that all de-icing activities occur out in the open.
> However, I’ve heard some airports now do this within enclosures.  Are these
> enclosures two side (i.e., the plane pulls straight in one side of the
> enclosure and straight out the other side of the enclosure without raising
> and lowering doors on the entrance and exit?
>
>
>
> Any other details you can provide me would be appreciated.
>
>
>
> Thanks
>
>
>
> Ron
>
>
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