Fly heading 232 for 35, qfe 29.............

[bloomstomb]

runway 13, to pattern altitude.

 

 

 

Hey guys I am doing a training mission for landing. The manual does not explain this line .

 

What does "for 35" mean. Im assuming distance. But explain how I would go about using this info I received from ATC.

 

Thanks.

[xjiks]

Fly heading 232 for 35, qfe 29.............

runway 13, to pattern altitude.

232 = direction

35 = miles (distance)

qfe 29, relative to pressure at local airport (I also don't know what to do with this information) :music_whistling:

runaway 13 = seems you already know that :smilewink:

pattern altitude = 4000 feet altitude (not sure?)

 

The "big heads" of this forum will surely add info or correct me if I'm wrong

[Ryrrar]

I've been wondering how exactly you know how far you've flown? when it says 35 miles, how do you know how many miles you've flown?

[aaron886]

I've been wondering how exactly you know how far you've flown? when it says 35 miles, how do you know how many miles you've flown?

 

Fly at 200 kts GS. Every 18 seconds is a mile. :D

[shawnyp420]

You could also set a markpoint\waypoint on the runway. This will give you distance.

[Cajun]

Concerning ATC providing pressure reading: Below the transition altitude (the altitude where you go from HG to SPS [standard pressure setting]) aircraft work on HG. Once they reach the transition altitude, which varies in different countries and can be found on the relevant charts, they switch to SPS, which is 1013.25MB, or 29.92 Inches of Mercury. These are then called flight levels. The main purpose of having flight levels are to maintain a set vertical distance between aircraft. That's why it's important to have SPS set when you need it set, if one aircraft is going head on towards another and they have different altimeter settings, they could collide. I can think of a couple of incidents where that has happened.

 

Basically, pressure can vary. A mass of colder air, for example, increases the pressure lapse rate and causes isobars to dip. A mass of warmer air causes the pressure lapse rate to decrease, making isobars expand. (Isobars - lines joining places of equal pressure). Therefore, the 600hpa level in a mass of cold air is lower than it is in a mass of warm air. The basic rule is, "From high to low, look out below", which means that when you're flying from an area of high temperature or pressure to an area of low temperature or pressure, your altimeter is overreading, and your true altitude is lower than what's being indicated to you. But, if all aircraft have SPS (1013.25, or 29.92) set they will all maintain their separation.

 

Every half hour the ATIS is updated and the HG will be given. Once you're above transition altitude, you set SPS and forget about it. On the way back down, when you pass transition level (where you go from SPS back to HG) you set the regional HG (lowest forecast HG for the area you're flying in) or the HG for your aerodrome.

 

Here in the u.s. its 18,000 ft msl. above that its just set 29.92 and forget about it.

 

I dont think this is modeled in DCS but I may be wrong.

[Bahger]

No, "For 35" is the glideslope intercept altitude. Turn to the heading and set up a descent to the altitude. Then you be set up to ride the glideslope down to the runway if you are set up for an ILS approach to a suitably equipped field.

[EvilBivol-1]

In the landing training mission, the "instructor" is using the HSI to determine when you are hitting the final approach fix. This is why it's important to set the HSI to the runway heading (even if it's off by a few degrees as you'll find reported in numerous threads on the forum). When set to runway heading, the CDI needle on the HSI will indicate when you are approaching the course for final and in the training mission the instructor will prompt you when this happens.

 

As as additional aid, you can use the TAD to set a markpoint at the bearing and range provided by ATC using the TAD cursor with the hook function (left side of the display) set to OWN-CURS.

 

No, "For 35" is the glideslope intercept altitude. Turn to the heading and set up a descent to the altitude. Then you be set up to ride the glideslope down to the runway if you are set up for an ILS approach to a suitably equipped field.

"for xx" is indeed the range. Altitude is not specified and the directions are limited to "pattern altitude." This will be about 2,000-3,000 ft., depending on the airport.

[Ptimat31]

Hi guys,

 

Regarding the pressure, I'm just curious what the message means ?! I would expect either a QNH/QFE but with a complete pressure like 2992 or 1013 or whatever the pressure of the day. Here I'm just confused.

 

Cheers,

Mat

[bloomstomb]

I wish we had a some tutorials that would explain things in depth.

 

Did you guys learn things by reading the manual? The tutorials just dont have enough info imo.

[EvilBivol-1]

bloomstomb, you may find some of the additional materials here helpful:

http://en.wiki.eagle.ru/wiki/DCS:_A10C_Training_Supplements

 

In particular, check the training videos section for some helpful links.

[bloomstomb]

Another question.

 

Im setting HSI course to 130 for the landing training missions where I am landing at batsumi airport.

 

Where did he get 130 from?

[EvilBivol-1]

You can see the runway heading on the Divert page. It's also provided by ATC - "runway 13".

[bloomstomb]

You can see the runway heading on the Divert page. It's also provided by ATC - "runway 13".

 

OK im on the divert page now , I dont see 130 tho.

 

On the first divert page (before I click on batumi) I see this.

 

51 batumi

218/42.2 ttg:7:38

 

When I click on batumi I see 131.00

 

I dont see 130 in these screens.

[EvilBivol-1]

Once you select Batumi from the Divert page, you'll enter the Batumi FLDINFO (field info) page. There you will see the line 'RWY : 13'. This stands for 'runway heading 130' and is the same information provided by ATC ("runway 13"). The last digit is dropped.

[ttaylor0024]

I believe pattern altitude is 2500ft?

[bloomstomb]

I believe pattern altitude is 2500ft?

 

Thats what they said, but when I dive to that debth the needle on that little ball says Im too low.I just try to follow the 2 ils needles which works fine.

 

 

Also ty for clearing that up about the 130 course . I thought it was rounding down the 131 lol.

[Gunjam]

Under pressure

 

qfe 29, relative to pressure at local airport (I also don't know what to do with this information) :music_whistling:

 

 

I believe the ATC programming is incomplete.

 

I tried setting up different pressure in the mission editor, but ATC would still just say QFE '29'

 

It should say four digits for pressure, ex. 29.86 or 30.09

 

If it gave you four QFE digits, you would set those four digits on your altimeter and the altitude displayed there would then be actual altitude above field elevation, meaning at approximately 0 feet you would touch the runway.

 

QFE = Actual current pressure at field elevation

QNH = Actual current pressure at sea level

QNE = ISA (International Standard Atmosphere) standard pressure. Always 29.92 inHg or 1013.25 Mbar depending on which system used in the aircraft.

(QNE is mostly used to calculate density altitude for aircraft performance calculations, and the pressure level may be below the sea level or above it.)

 

Gunjam

Edited March 30, 2011 by Gunjam
Clarification

[Rainmaker]

If it gave you four QFE digits, you would set those four digits on your altimeter and the altitude displayed there would then be actual altitude above field elevation, meaning at approximately 0 feet you would touch the runway.

 

 

I believe there is some error in your thinking. Your altimeter is calibrated to read elevation in a reference to sea level based on what the airfield gives you. You will not read zero when on the airfield unless the airfield itself is at a sea level elevation. For example, if you at at an airfield who's elevation is at 100 Ft MSL, at touchdown your altimeter will be reading 100 Ft, not zero.

 

Edit, turns out *I* am thinking of the wrong thing...carry on

Edited March 30, 2011 by Rainmaker

[S77th-konkussion]

And you would be setting this at the "transition" level- if it were correctly modeled?

[peacedivision]

Thats what they said, but when I dive to that debth the needle on that little ball says Im too low.I just try to follow the 2 ils needles which works fine.

 

 

Also ty for clearing that up about the 130 course . I thought it was rounding down the 131 lol.

 

 

You should always intercept the ILS glideslope from below, this is normal. Fly at pattern altitude till the ball centers, then head on down. :thumbup:

[Rainmaker]

Okay, since it goes right along with this thread to a point...I will ask it here.

 

Why are altimeters set to match the field elevation data prior to takeoff if the data is given in a QFE value from approach to set the altimeter to read zero at field elevation on landing? For example, I beleive our field elevation here is somewhere around 110 feet...and our pilots set the altimeter by what tower gives them and they verify the correct settings by using the elevation signs at EOR. I don't have a flying background to help me here, but I know at the end of both runways where I work we have field elevation signs that the pilots use every day to verify their elevation in the real airplane based on what tower gives them as a baro. What here am I missing or not understanding?

Edited March 30, 2011 by Rainmaker

[peacedivision]

Okay, since it goes right along with this thread to a point...I will ask it here.

 

Why are altimeters set using the field elevation data prior to takeoff if the data is given in a QFE value from approach to set the altimeter to read zero at field elevation? I speak with this in reference to R/L procedures. I don't have a flying background to help me here, but I know at the end of both runways where I work we have field elevation signs that the pilots use every day to verify their elevation in the real airplane based on what tower gives them as a baro.

 

 

Altitude should never be set to 0 at field elevation, unless the field is 0 feet above sea level. Set altitude to the field level, Radar altitude tells you the rest.

 

ATC SHOULD be giving pressure in 4 digits, IE 29.92 as others have stated. just telling us 29, 30 ect is completely useless.

[bloomstomb]

You should always intercept the ILS glideslope from below, this is normal. Fly at pattern altitude till the ball centers, then head on down. :thumbup:

 

ooooh and here I thought I had to ride it the entire time I came in range of ils. That makes perfect sense. One other thing, how do I tell what pattern altitude is for a runway?

 

thx

Edited March 30, 2011 by bloomstomb

[636_Castle]

QFE = A setting used to determine your altitude above the Field Elevation.

 

It's SOP in the military to zero your altimeter at your departure field. Do not set the barometric pressure setting as per civilian training.

 

Be advised ED doesn't set QFE in the default cockpit state, they set QNH.

Edited March 30, 2011 by 636_Castle