Icing and supersonic speed.

Alpha Crucis Radio Network IT Admin wrote:
> I found that in Flight Simulator engines 9.1 and 10.0 icing is simulated
> (if cold enough and a high enohgh altitude) that can make the autothrottle
> go hayware. Can something like that happen in a real airplane?
>

What altitude did this happen at?

Alpha Crucis Radio Network IT Admin wrote:

> "MarcoPoloPlayer" <root@localhost> wrote in message
> news:464739b0$0$4652$4c368faf@roadrunner.com...
>
>>Alpha Crucis Radio Network IT Admin wrote:
>>
>>>I found that in Flight Simulator engines 9.1 and 10.0 icing is simulated
>>>(if cold enough and a high enohgh altitude) that can make the
>>>autothrottle
>>>go hayware. Can something like that happen in a real airplane?
>>>
>>
>>What altitude did this happen at?
>
>
> usuallu at around 37,000 feet
>

Do not put so much reliance into your simulator

Alpha Crucis Radio Network IT Admin schrieb:
> I found that in Flight Simulator engines 9.1 and 10.0 icing is simulated
> (if cold enough and a high enohgh altitude) that can make the autothrottle
> go hayware. Can something like that happen in a real airplane?
>
No, because real world pilots turn the pitot heating on, which you
forgot to do.
T.


> But when this has happend, and the autothrottle gets confused and puts
> the engines to at or near full power, that some common passenger
> aircraft can exceed Mach 1. I had that happen to in in FS9.1 and
> FSX with an Airbus A340, and I ended up reaching a speed of
> Mach 1.10. The engines of an A340 are powerful enough to propel
> the craft to Mach 1.10 (at 39,000 feet, though you would not want to
> do this very long in a real airplane becuase of the rate at which fuel
> would be consumed), and when FS did that with a 737-500, I
> ended up doing Mach 1.01 in a 737-500, until I switch the
> throttles to manual control and slowed the aircraft down to
> the normal cruise sped of .74 to .77 mach for a 737.
>
>

> Yes. After all, it is a MICROSOFT game.


Yep. In fact, the Concorde didn't have icing problems. At supersonic
speed, the friction of air made the skin of the concorde so hot that the
plane stretched by a measurable amount. Ice would not form on such hot
surfaces.

"Nobody" <nobody@nobody.org> wrote in message
news:31e3$464d1b1b$cef8887a$8225@TEKSAVVY.COM...
>
>> Yes. After all, it is a MICROSOFT game.
>
>
> Yep. In fact, the Concorde didn't have icing problems. At supersonic
> speed, the friction of air made the skin of the concorde so hot that the
> plane stretched by a measurable amount. Ice would not form on such hot
> surfaces.

That is true with the A340, when it tops out at Mach 1.1, the surfaces are
warmed enough where the icing problem dissapears with about 1/2 hour
and the autothottle can once again be used.

Re: Microsoft software allowing an A340 to go Mach 1.1

In fairness, you can take many modern jets and make them exceed mach 1.
Climb high enough, and with full power on, start to descend quickly.

Whether you can recover from it is another question alltogether.

"Nobody" <nobody@nobody.org> wrote in message
news:c6b1b$464e4665$cef8887a$24179@TEKSAVVY.COM...
> Re: Microsoft software allowing an A340 to go Mach 1.1
>
> In fairness, you can take many modern jets and make them exceed mach 1.
> Climb high enough, and with full power on, start to descend quickly.
>
> Whether you can recover from it is another question alltogether.

Well, what happens is that when freezing occurs and the autothrottle
goes haywire, the IAS will read 0, and the auththrottle will think
that, and will push the throttles to full, trying to reach the airspeed it
is set for.

What I am talking about in an A-340 is flying at 37,000 feet, with
the engines at full power. An A-340 can, at 37,000 feet, reach
Mach 1.1 if the engines are at full power.

I have had Mach 2.98 in a Concorcde in MSFS, so the Concorde,
when it was flying, was capable of reaching Mach 2.98 at an
altitude of 55,000 feet. At that rate of Speed, New York to
London could be achieved in about 2.5 to 3 hours.