investigating Bombing solution seems to use Barometric Altitude only

[YoYo]

I've done some testing, using different altitudes and different maps. I haven't touched QNH (its from briefing). I only use CCRP for the drop, and it seems to be working fine. However, there are a few things worth observing. Ideally, the airspeed should be around 750-850km/h, the altitude should be 2000 m or less (though it's hard to say what the radar altitude is). I turn on the laser manually, but wait until I'm relatively close to the target (less than 4.5 seconds), and indeed, without adding different QFE, I hit very well.

[IvanK]

10 hours ago, AeriaGloria said:

2. target altitude and QFE must be set for CCRP (this part works and is seemingly correct) 

Why are you talking about QFE ? 

The ME entry for atmospheric pressure is QNH that is Altitude Above Mean Sea Level (AMSL)

QFE is Altitude above the airfield elevation ... setting QFE will have the altimeter reading zero.

The DTC Altitude entry is AMSL so you need to be setting QNH on the aircraft Altimeter.  The DTC in DCS is not interested in QFE !

IRL

I believe standard Russian practice is indeed to use QFE rather than QNH certainly for airfield operations. However At present the DTC and therfore the MIG29 weapons calculation are only interested in QNH as the altitude datum.

Our only reference we have found so far is the Alan R . Wise version of the MIG29 manual that talks about setting a Delta H value for target elevation into the system. Now if this is indeed correct then QFE would indeed be what the weapon system references.

Here in lies the conundrum, DCS DTC is using QNH as the datum 

DEVS

A clear description from the devs on how the MIG29 actually does its ranging (in DCS) would solve this argument once and for all. At present we are all groping in the dark just a little.

 

[Кош]

19 минут назад, IvanK сказал:

Why are you talking about QFE ? 

The ME entry for atmospheric pressure is QNH that is Altitude Above Mean Sea Level (AMSL)

QFE is Altitude above the airfield elevation ... setting QFE will have the altimeter reading zero.

The DTC Altitude entry is AMSL so you need to be setting QNH on the aircraft Altimeter.  The DTC in DCS is not interested in QFE !

IRL

I believe standard Russian practice is indeed to use QFE rather than QNH certainly for airfield operations. However At present the DTC and therfore the MIG29 weapons calculation are only interested in QNH as the altitude datum.

Our only reference we have found so far is the Alan R . Wise version of the MIG29 manual that talks about setting a Delta H value for target elevation into the system. Now if this is indeed correct then QFE would indeed be what the weapon system references.

Here in lies the conundrum, DCS DTC is using QNH as the datum 

DEVS

A clear description from the devs on how the MIG29 actually does its ranging (in DCS) would solve this argument once and for all. At present we are all groping in the dark just a little.

 

Why do you use non original manuals?

[AeriaGloria]

50 minutes ago, IvanK said:

Why are you talking about QFE ? 

The ME entry for atmospheric pressure is QNH that is Altitude Above Mean Sea Level (AMSL)

QFE is Altitude above the airfield elevation ... setting QFE will have the altimeter reading zero.

The DTC Altitude entry is AMSL so you need to be setting QNH on the aircraft Altimeter.  The DTC in DCS is not interested in QFE !

IRL

I believe standard Russian practice is indeed to use QFE rather than QNH certainly for airfield operations. However At present the DTC and therfore the MIG29 weapons calculation are only interested in QNH as the altitude datum.

Our only reference we have found so far is the Alan R . Wise version of the MIG29 manual that talks about setting a Delta H value for target elevation into the system. Now if this is indeed correct then QFE would indeed be what the weapon system references.

Here in lies the conundrum, DCS DTC is using QNH as the datum 

DEVS

A clear description from the devs on how the MIG29 actually does its ranging (in DCS) would solve this argument once and for all. At present we are all groping in the dark just a little.

 

Sorry QNH. 
 

I found the phrase from the Alan Wise manual in the L-18 Yugoslavian manual where it’s likely translated from 

[IvanK]

1 hour ago, AeriaGloria said:

I found the phrase from the Alan Wise manual in the L-18 Yugoslavian manual where it’s likely translated from

Can you show us that in both English and the native ? Be great to see it. I have the L18 (VTU-01.VTUP.001/01.0) manual got a page reference for the statement. I struggle with the Yugoslav translation though.

 

1 hour ago, Кош said:

Why do you use non original manuals?

I do but struggling with the translation

Edited yesterday at 11:10 PM by IvanK

[AeriaGloria]

1 hour ago, IvanK said:

Can you show us that in both English and the native ? Be great to see it. I have the L18 (VTU-01.VTUP.001/01.0) manual got a page reference for the statement. I struggle with the Yugoslav translation though.

 

I do but struggling with the translation

“

The introduction of ballistic data of the aircraft bombs is carried out before the PK flight by a special team, by setting the coated switches (code guidance) in positions corresponding to the code of the aircraft bombs being used. Depending on the conditions of combat use and the mode of bombing with the PVK, the elevation, the target's descent relative to the take-off airport (HEA) and the specified bomb drop angle are additionally introduced when bombing from a climb.

In addition, ballistic data input is also provided for all aircraft bombs with PVK.”

Uvodjenje balističkih podataka avionskih bombi vrši se pre leta PK od strane posebne ekipe, postavljanjem obloženih preklopnika (kodno vodjenje) u položaje koji odgovaraju kodu avionskih bombi koje se upotrebljavaju. Zavisno od uslova borbene primene i režima bombardovanja sa PVK, dopunski se uvodi nadvišavanje, priniženje cilja u odnosu na aerodrom poletanja (Hea) i zadati ugao odbacivanja bombi pri bombardovanju iz kabriranja (penjanja).

Pored toga, za sve aviosnke bombe sa PVK se obezbedjuje takodje informaciono uvodjenje balističkih podataka.
 

It is page 324. Gonna try and find it in the Russian version. When bombing from a climb implies to me that this primarily meant for CCRP. 

Edited 23 hours ago by AeriaGloria

[IvanK]

Ok thanks. found it too