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Which FS for training? (Read 1816 times)

Reply #15 - Jul 9^th, 2009 at 2:09pm

Travis Offline
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DenisH wrote on Jul 9^th, 2009 at 11:18am:

The comments regarding Ron, the virtual instructor on FS2004 are interesting since I have been going crazy trying to find out things he neglects to tell you (between jokes). Just yesterday I was reviewing his lesson on tower procedures hoping to discover why the tower always includes a mysterious (to me) altitude reading when assigning a runway. It's usually the same number 2909 or something like that even when the airport is at sea level. Can anyone please explain this? And forgive yet another dumb question from a relative new boy to FS.

Dennis, the number given is usually "Two Niner Niner Two". This isn't an altitude, it's a pressure. 29.92 is the normal pressure for a standard day. You must tune the altimeter to the setting ATC gives you so that your altimeter reads correctly. Check out this Wiki entry for more info.

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Reply #16 - Jul 9^th, 2009 at 4:59pm

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Travis: Mystery solved! Thank you so much for that info. I've gone to Wiki and bookmarked it for later study. Appreciate the prompt reply.

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Reply #17 - Jul 9^th, 2009 at 5:40pm

flaminghotsauce Offline
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DenisH wrote on Jul 9^th, 2009 at 11:18am:

The comments regarding Ron, the virtual instructor on FS2004 are interesting since I have been going crazy trying to find out things he neglects to tell you (between jokes). Just yesterday I was reviewing his lesson on tower procedures hoping to discover why the tower always includes a mysterious (to me) altitude reading when assigning a runway. It's usually the same number 2909 or something like that even when the airport is at sea level. Can anyone please explain this? And forgive yet another dumb question from a relative new boy to FS.

Would that be the barometric pressure? Set that into your altimeter to get the accurate altitude reading. Or push "B" and it'll set it for you.

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Reply #18 - Jul 10^th, 2009 at 12:55am

DenisH Offline
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FLAMING Yep! That's what it is! Thanks!

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Reply #19 - Jul 10^th, 2009 at 9:59am

olderndirt Offline
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Whatever they give should put your altimeter at field elevation or very close thereto.

THIS IS NOT A PANAM CLIPPER

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Reply #20 - Jul 10^th, 2009 at 10:17am

olderndirt Offline
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The altimeter setting provides a height above sea level rather than a height above terrain thus assuring that all aircraft, using the setting, are truly at the indicated altitude on their altimeters. Without continuous setting adjustments as you fly cross country your indicated altimeter altitude would become incorrect as you flew into areas of higher or lower pressure. No jokes

.

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Reply #21 - Jul 10^th, 2009 at 10:48am

Zaphod Offline
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olderndirt wrote on Jul 10^th, 2009 at 10:17am:

The altimeter setting provides a height above sea level rather than a height above terrain thus assuring that all aircraft, using the setting, are truly at the indicated altitude on their altimeters. Without continuous setting adjustments as you fly cross country your indicated altimeter altitude would become incorrect as you flew into areas of higher or lower pressure. No jokes

.

The ATC at my local areodrome (Headcorn Kent UK) will give two differing readings depending on the type of flight. Any aircraft that is incoming to land or is flying circuits will be given QFE which gives zero feet on the runway. Departing flights and flights leaving the ATZ are given QNH which is zero feet a MSL (Mean sea level?)
Not sure if this applies outside the UK.

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Reply #22 - Jul 10^th, 2009 at 10:57am

Fozzer Offline
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I just drop a Plumb Bob over the side, on the end of a piece of string, and measure it now and again as I come in to land....

...simple...

...!

Paul...feeling all "strung out" again... Wink

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Grin

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Reply #23 - Jul 10^th, 2009 at 11:01am

Brett_Henderson Offline
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Zaphod wrote on Jul 10^th, 2009 at 10:48am:

olderndirt wrote on Jul 10^th, 2009 at 10:17am:

The altimeter setting provides a height above sea level rather than a height above terrain thus assuring that all aircraft, using the setting, are truly at the indicated altitude on their altimeters. Without continuous setting adjustments as you fly cross country your indicated altimeter altitude would become incorrect as you flew into areas of higher or lower pressure. No jokes

.

The ATC at my local areodrome (Headcorn Kent UK) will give two differing readings depending on the type of flight. Any aircraft that is incoming to land or is flying circuits will be given QFE which gives zero feet on the runway. Departing flights and flights leaving the ATZ are given QNH which is zero feet a MSL (Mean sea level?)
Not sure if this applies outside the UK.

Zaphod.

That's interesting (in a scary way). I like the idea of everybody on the same page.. It's an inbound pilot's responsibility to know field elevation.. and make mental adjustments Cool

Cool

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Reply #24 - Jul 10^th, 2009 at 11:06am

Zaphod Offline
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Brett_Henderson wrote on Jul 10^th, 2009 at 11:01am:

Zaphod wrote on Jul 10^th, 2009 at 10:48am:

olderndirt wrote on Jul 10^th, 2009 at 10:17am:

The altimeter setting provides a height above sea level rather than a height above terrain thus assuring that all aircraft, using the setting, are truly at the indicated altitude on their altimeters. Without continuous setting adjustments as you fly cross country your indicated altimeter altitude would become incorrect as you flew into areas of higher or lower pressure. No jokes

.

The ATC at my local areodrome (Headcorn Kent UK) will give two differing readings depending on the type of flight. Any aircraft that is incoming to land or is flying circuits will be given QFE which gives zero feet on the runway. Departing flights and flights leaving the ATZ are given QNH which is zero feet a MSL (Mean sea level?)
Not sure if this applies outside the UK.

Zaphod.

That's interesting (in a scary way). I like the idea of everybody on the same page.. It's an inbound pilot's responsibility to know field elevation.. and make mental adjustments Cool

Cool

I think it may be due to the fact that the ATC at Headcorn is classified as A/G ( Air Ground Advisory, I think) which means they don't give permision to land or take off and any action is at the pilots discretion. They only provide local information.

Zaphod.

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Reply #25 - Jul 10^th, 2009 at 11:09am

olderndirt Offline
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Zaphod wrote on Jul 10^th, 2009 at 10:48am:

The ATC at my local areodrome (Headcorn Kent UK) will give two differing readings depending on the type of flight. Any aircraft that is incoming to land or is flying circuits will be given QFE which gives zero feet on the runway. Departing flights and flights leaving the ATZ are given QNH which is zero feet a MSL (Mean sea level?)
Not sure if this applies outside the UK. Zaphod.

QNH is world wide. We call it Altimeter Setting - same thing. The other, QFE, must be for some instrumentation (radar altimeter?) which requires that setting.

THIS IS NOT A PANAM CLIPPER

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Reply #26 - Jul 10^th, 2009 at 11:17am

Zaphod Offline
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olderndirt wrote on Jul 10^th, 2009 at 11:09am:

Zaphod wrote on Jul 10^th, 2009 at 10:48am:

The ATC at my local areodrome (Headcorn Kent UK) will give two differing readings depending on the type of flight. Any aircraft that is incoming to land or is flying circuits will be given QFE which gives zero feet on the runway. Departing flights and flights leaving the ATZ are given QNH which is zero feet a MSL (Mean sea level?)
Not sure if this applies outside the UK. Zaphod.

QNH is world wide. We call it Altimeter Setting - same thing. The other, QFE, must be for some instrumentation (radar altimeter?) which requires that setting.

According to Wikipedia QFE is "Atmospheric pressure at airfield elevation". In the case of Headcorn which I believe is approx 72 feet ASL the difference between QFE and QNH is normally about 2 millibars (QNH being the higher figure.)
As previously stated QFE is only qouted to incoming aircraft who intend to land or aircraft that are remaining in the circuit for touch and goes. Any departing aircraft and aircraft transitting the ATZ are given QNH.
To me, and I hassen to add I'm not a real life pilot, it makes perfect sence. Approach using QNH and change to QFE when on finals to have the altimeter read zero at touch down?

Zaphod.

What doesn't kill you makes you stronger. But why take the risk?
Intel i7 950 3.06Ghz (8mb Cache)
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Reply #27 - Jul 10^th, 2009 at 11:23am

olderndirt Offline
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Zaphod wrote on Jul 10^th, 2009 at 11:17am:

According to Wikipedia QFE is "Atmospheric pressure at airfield elevation". In the case of Headcorn which I believe is approx 72 feet ASL the difference between QFE and QNH is normally about 2 millibars (QNH being the higher figure.)
As previously stated QFE is only qouted to incoming aircraft who intend to land or aircraft that are remaining in the circuit for touch and goes. Any departing aircraft and aircraft transitting the ATZ are given QNH.

Zaphod.

Goes to show - never to old to learn but I agree with Brett - a little scary and too much information.

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Reply #28 - Jul 10^th, 2009 at 11:30am

Brett_Henderson Offline
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I always scratched my head Huh

Huh

over using pressure altitude (29.92) for everything over 18,000feet..

But, at least everyone is on the same page.. AND above 18,000 is class 'A' airspace.. so you're under ATC control for vertical seperation..

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Reply #29 - Jul 10^th, 2009 at 11:35am

olderndirt Offline
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Brett_Henderson wrote on Jul 10^th, 2009 at 11:30am:

.. so you're under ATC control for vertical seperation..

And five miles lateral - anything less sets off the alarm

.

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