IvanK

Another test. Same mission 1985 no GPS POS INS no wind. Initially did a Point Blank HUD designation (flt time 2 mins), ASL appeared centered on the designation diamond as expected. Then flew for 30 odd mins. INS drift as in previous post much the same. So Undesignated. Came around and did another Point Blank (HUD) designation (33 mins flt time). ASL pops up displaced to the left.?? why given its a new designation and nil wind it should be through the designation diamond. ... Something is off and it relates to Flight time. Came around again and did a CCIP pass, DIL and CCIP was leaning out to the right (East again).

Another test this time using AUTO and looking at a Manual designation and what happens after 26 mins flying. Interestingly the ASL is displaced to the South. The top image is immediately after the HUD designation. The Designated point has drifted 041 for about 151m i.e easterly. Which for an un updated raw INS system is pretty good imo and works out about 300m per hour. However given this is Nil wind I would have expected the ASL to be running through the Designation diamond ?

Some more testing. Again DIL line always seems to be displaced to the east after 30 odd mins flying POS INS. AGR display indicates 0 Vel error. Again nil wind. Images depict CCIP and subsequent impact point (x). Interestingly Impact point lies directly under the VV adjacent the CCIP + position ... i.e. about were the CCIP + should be if it and the DIL weren't leaning over to the East.

In my tests I have the exact elevation for the waypoint pre programmed. Wypt elevation is not however a player in CCIP. As to using Auto with the wrong elevation... not a big deal ... the diamond obviously wont be on the actual TGT so refine the designation in the HUD ... as soon as you stop slewing AGR takes a range sample and uses that for the calculation. If you didnt have AGR working then yes it would be an issue. The issue here is why is the DIL line and CCIP + leaning over after 30 mins flight time in nil wind? This only happens if you are not using AINS. If in the ME you set the date to pre GPS times (e.g. 1985) you only have POS INS (INS in NAV rather than IFA) . Flying the same mission with a date say 2020 with POS AINS you dont have the issue.

In the 1985 type Hornet with non RLG type INS and without GPS an IFA is a big deal.

Looking further. Noted Nil wind then had a look at the DIL line on 4 different headings all around 90 degrees apart (Standard diagnostic thing in the last century on non GPS aircraft). Heading East or West DIL is is normal and vertically below the VV. But on Northerly and southerly headings it always leans towards the EAST !! ... Why ? If there was some unkown wind the DIL would be displaced downwind regardless of heading. In balanced flight nil wind DIL should be vertically under the VV. When I bombed with CCIP on the target weapon impacts were WEST of the CCIP cross. Take Off point Batumi, Tgt Novorssiysk so a fairly large change in Latitude .. about 3 degrees worth. Dist about 252nm. Is this some Earth transport error being reflected in a false vertical ? Update: Tested again over 250nm East West track no latitude change .... same issue with CCIP DIL and bomb impacts. Then reflew the first mission with POSAINS no issue DIL was good weapon impacts good.

Ok just had a look at INS drift over 30 mins POS INS only. after 30 mins the Drift was as shown in attached screen shot. So not to bad. However CCIP release resulted in bombs impact as shown by the X. I then attempted another CCIP release on a heading 90 degrees from the first ... same issue. Then landed GS showed 0 when parked. So something is very wrong imo. The Drift exhibited(though I consider ok) should not have resulted in the CCIP bomb errors seen. Doing an IFA is a not in real world a real option just to improve things ... it wont your original alignment will always be way better than any IFA. IFA is a last chance type thing to try and get something back after after say an INS crash etc. A vel update using PVU might be a thought .... though again should not be required.... and it doesn't look like its implemented. Either way the CCIP release impact errors seen after just 30 mins of flight are completely wrong. I tried an Auto release but need to try again after refing the designation to see where the bombs go. Anyway its a major issue imo ... good pick up Svend.

CCIP and Auto should still be pretty accurate since its only really using AGR and own ship present velocities. Same goes for Auto if the designation is refined .. I mean that was the only option in the early pre GPS Hornet days . Any INS errors would be very slight and would hardly effect weapons solution. Pre GPS days in the A model INS drift post flight un updated after say 1 hrs flight were only in the order of 1nm max with perhaps 3Kts residual ground speed.... and these with analog INS systems not the laser system in the updated C. As to TACAN update .. forget it you are biasing the INS position on an incredibly inaccurate source. Not forgetting you must have the TACAN station you are using both tuned and in the TACAN station update data base. Only updates worthwhile are the Overfly or perhaps Radar update using Expand modes. Any update has to be carefully decided on a Dud one might very well make your issue worse.

Do runway hook cables exist anywhere in DCS world or the Mission editor ?

Its been many moons since I used the expand modes (circa 1986.... pre GPS etc) however a diff I notice between old real world and DCS is this: You have a Designated tgt (be it WPTDGS or Radar map Designation whatever) You select one of the EXP modes say EXP2 You see the EXP 2 build over the designated point with the "stabilsed cue" over the designation. You refine the designation using the designation cursors The instant you release the TDC the display should immediately erase and the new EXP map should build with the stabilsed cue on the revised designation point. What you see in DCS is an awkward pause with the exp map still shown with the stabilsed cue still over the original position ... This just shouldn't happen and is confusing. The map eventually erases and slowly builds over the new position with the stabilsed cue on the new designation point. Never ever used the FRZ option (never had a reason to). Practically you could say in EXP2 or 3 (at say 10nm 30 deg off the nose) see the hookcable support structures and designate the centre of the rwy abeam the hookcable. Then fly an approach with the HUD diamond exactly where you placed it (+- say 3mins of INS drift). You could easily designate in EXP3 to an accuracy of +-70feet from 10nm. From the last Century

Marianas included: SyriaCyprusMarianas_Afld_ID_Mig29.pdf

All RAAF,RCAF,Spanish Hornets have VOR/ILS and associated DME capability Think the same applies for Finnish,Swiss and Kuwaiti Hornets as well.

Updated Syria map Airfield ID numbers in Mig 29, to include Cyprus and new Turkish airfields. Note Naqoura used to be ID 41 this is now Gazipassa. Naqoura now ID 51 SyriaCyprus_Afld_ID_Mig29_ver2.7.2.pdf

"for example: the very first fighter in the world to get a proper operational datalink is the Su-27 and surprisedly Su-27 in DCS don’t link Datalink between a group of them in Multiplayer. What a pure coincidence right…? " You sure about that ? ..... Swedish STIRL system used a pretty capable DL systemas early as the Draken. https://www.secretprojects.co.uk/threads/swedish-air-force-datalink-history-and-gripen-link-16-integration-described-by-czech-air-force-article.33880/

Hope they help

Still getting crashes. Don't have Scripts sub folder and don't have an Export.lua file

Even the Humble Mirage III could do 750Kts IAS on the deck

I restarted and Markings are back. Either way its a bug though it would seem a random one.

Just noticed the New rain sound associated with new cloud presets. The rain sound continues for quite a while after you climb above the rain cloud. Same on descent the rain sounds before entering cloud or being in rain.

Err I would have thought the lower RPM for Long range and the higher RPM for short range ?

Open Beta Ver 2.7 I havent checked all the airfields but think its Global on the Nevada map. (Caucus,Persian Gulf,Syria all ok) Nellis and McCarran runways and raxi ways are devoid of all Runway and taxiway markings.

The force in CW illumination is still strong young padawan

Damper tweaks in Ver 2.7 imo make the MIG29 a much nicer aeroplane down final. The pitch sensitivity to both pilot input and config changes is much improved. it sits there quire nicely on the Glide slope with much less tendency to oscillate in pitch.

Just checked some of the Syrian ID's and they differ from the main list in Slip Havocs post. I used the MIG29 to verify these. They are as of Version 2.7 Open Beta. Same table as above in PDF Syria_Afld_ID_Mig29.pdf

Some extra ones for Syria based on Update 2.7 34 Rosh Pina 35 Sayqal 36 Shayrat 37 Tabqa 38 Tafttanaz 39 Tiyas 40 Wujah Al Hajar (same as 33 ? one may be Heliport) 41 Naqoura (H)