Re: Whats up with deice ?

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On Sat, 23 Jun 2001 08:44:44 -0700, "Tarver Engineering"
<jtarver@sierratel.com> wrote:

>
>"Tim O'Neill" <tjoneill@mo-net.com> wrote in message
>news:3B33AA8A.68A5278E@mo-net.com...
>>
>>
>> Tarver Engineering wrote:
>>
>> > "Richard Fish" <dick@the.fish.net> wrote in message
>> > news:ExMY6.14894$wM1.1503780@bin2.nnrp.aus1.giganews.com...
>> > > In article <3b335931$1_1@binarykiller.newsgroups.com>, "Tarver
>> > Engineering" <jtarver@sierratel.com> wrote:
>> > >
>> > > >
>> > > >The uncommanded roll at roselawn had nothing to do with the boots.
>> > > >
>> > > >John
>> > > >
>> > > >
>> > > Please explain what did cause the Roselawn ATR crash.
>> >
>> > I believe the autopilot caused the uncommanded roll at Roselawn. Note
>also
>> > that since Roselawn ATR operators have been disengaging the autopilot in
>> > icing conditions; there have been no further departures from controlled
>> > flight. There had been numerous complaints about ATR autopilot engaged
>> > flight in icing conditions prior to Roselawn where the airplane executed
>> > uncommanded manouvers.
>> >
>> > NASA Dryden icing tests of the ATR proved experimentally that what NTSB
>> > claimed for this event did not in fact occur.
>> >
>> > John
>> >
>> > -----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
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>>
>> Better check this out-and this plane was one that was "fixed"
>> http://www.ntsb.gov/NTSB/brief.asp?ev_id=20001204X00040&key=1
>>
>> As I remember, the roll that caused the Roselawn crash occurred as a
>result of
>> aileron reversal due to ice accretion behind the boot at the time the
>autopilot
>> disconnected due to reaching force limits.
>
>Auto pilot Roll angle limit of 23.5 degrees was exceeded. The other
>explaination is unequal icing between the left and right wing causing one
>wing to stall sooner. I suspect a roll gyro problem caused by a switcher
>power supply in the gyro source. Older versions of these supplies are known
>to be unreliable crossing 0 C.

Good God, what a fjucking idiot.

>
>> Post-Roselawn icing tests did prove
>> that ice accretion could occur aft of the boots and a whole raft of new
>> recommendations for recognizing airframe icing and fixes to the airframe
>> resulted from the testing.
>
>Only when the flaps were fully extended and 2X rated slurry was applied. It
>is a known fact that the Flaps were not in said configuration at Roselawn.

You mean th esplaperons, right?
Bertie

Spam this asshole.

james@rankyou.com