[Closed] Maximum Speed of Aircraft does not change as altitude progresses!

[xfinisherx2]

Hello all,

As you may have noticed, I have transitioned to a new computer with help from an older topic I posted answered gracefully by
whiskey-zulu - Thanks.

As I ascend in altitude in FSX, my maximum airspeed for many of my aircraft, including the Thomas Ruth (freeware) Airbus
A340-600 is stuck at the
level it is when I am on the ground. For example, my maximum speed in the 'flight info' when I am in an FSP flight, It shows
Max airspeed 340 kts, Max
gear 270 kts Max flaps 220 - I am fine with these figures as I am on the ground. However, As I climb altitude, and pass 10
thousand feet, my Airspeed
is still a maximum at 340. Should I attempt to go faster, Overspeed indicators occur, and the aircraft breaks into thousands
of pieces.

Before, on my old machine, I had it fluctuate properly, meaning that as I gain altitude, the max airspeed went up. Now, it
does not, and I do not want
to have to fly my aircraft at 300 kts for a whole journey, when I should be flying at or about 570 kts.

Thanks in advance.

xfx2

[whiskey-zulu]

Have you tried actually calculating what your True Airspeed is? Does the Mach number change according to altitude?

[xfinisherx2]

I'm not too quite sure. I have my settings in FSX set the airspeed to - True Airspeed indicator - or something similar.

The thing is that 340 is my limit no matter what altitude I am at, meaning that whether I am at 200 ft or at 37 thousand ft my max is still 340 kts.

[whiskey-zulu]

Remember that as you climb, Mach speed reading will fall against IAS - this is normal. Does the aircraft have a GPS panel which indicates groundspeed
or IAS? You should also change your FSX settings to show Indicated Airspeed (IAS).

[xfinisherx2]

I thank you for your support, however, some of this is confusing to me.

The panel aliases to the 321 but with some modifications to make it compatible with the 4 engine A340. The GPS module is the same one found in most
default jetliners in FSX, like the CR7, B737, and A321.

I'm still not getting as to why the airspeed in the flight info does not increase along with my ascent in flight. The same event may happen without
FSP running, I will make a few test flights and see if I can correct the problem.

[whiskey-zulu]

Above transition altitude, you should be flying mostly using Mach Speed numbers. Your Indicated Airspeed is likely not increasing as you're on the
limit of the aircraft's operational speeds and you have not chosen Mach Speed over Knots.

The GPS module will have a ground speed readout - this can give a good clue as to what speed you are flying.

Your airspeed is essentially increasing in flight, but your read-out is not changing.

[xfinisherx2]

Okay, I think I have gotten the drift.

My speed in knots, must always stay under 340, under all circumstances.

But, at 36 thousand ft, it stays under 340, but the Mach reading under it is at or about .82, the normal cruising speed.


So in essence, all I must do is pay attention that my IAS, in knots, does not increase 340, and the Mach speed should be about .82 when at cruising
altitude?

If so, I believe I have solved my problem. Before, I would always rely on the IAS, and by doing so it increased automatically in the flight status.

So, to finalize the situation, just follow Mach above transition altitude, or make sure the IAS does not increase 340.

Thank you.

[whiskey-zulu]

xfinisherx2 wrote:

So in essence, all I must do is pay attention that my IAS, in knots, does not increase 340, and the Mach speed should be about .82 when at cruising
altitude?

Correct.

[xfinisherx2]

Thanks so much! You may close the thread.

[Joeflyer]

Your wish has been granted Especially since you opened another thread on the same topic



Post Edited ( 03-07-11 16:05 )