Jar72

I confirm, same for me, fast repair and Marianas is downloaded and working fine. Thank you very much ED for the very quick fix, during a weekend !

Hi. Same problem. Same messages. Terrain folder also disappeared from hard drive. Full re-install of DCS does not solve it. Thank you in advance for your support.

Hello guys. I have been flying since 3 years, almost day to day, on this dream-come true F-14. And today, practicing landing in Blanker's mission, in the F-14 A, I started a sh... hot break. I got myself a sweet 3-wire, on speed + on altitude + on center line from close. The rare kind if you know what I mean. And guess what Jester said for the 1st time? "Cobra would be proud of you". Such a cool easter egg !!! I had not known it existed. Heatblur team, hurray !!! Cheers. JAR

After training since... forever with your mission. I decided to try what would happen with a sh... hot break in the F-14. Thank you for this nice EASTER EGG in this must-have mission !!! I did not know it existed I also got a cool easter egg from Jester by the way, who said for the 1st time : "Cobra would be proud of you". (Cobra is in HB team).

Oh man, you are killing me! Lol. Of course, fully agree. I googled it quickly, I don't know where the - 24 came from then ! I was in south atlantic map for the tests though... 44 degrees celcius not common there. I don t remember exact reference temperature, but still pretty similar results between dcs and the tas calculator. Anyway, i think I got the answers I needed, no need for me to re do accurate tests to prove dcs is rightly modelled or not. The point of this thread was to understand where the difference came from when assessing bandit ias based on closure rate. I believe we all made good points, don t you agree? Thanks. Jar.

Sorry but I kind of disagree about the standard day being rare, or about not being standard model in the t'as calculator. If you want to be purist, let me clarify what I had in mind then please. To prevent misinterpretation of the limitations, or rather non limitations in this case, of dcs. I was referring to temperature of air varrying with altitude. When designing aircrafts for instance, you use standard atmosphere model, with a temperature gradient based on altitude. I tend to think dcs has a kind of a model for the atmosphere as well, based on the standard, with variation of the reference point depending on weather conditions. These standard models are pretty representative of real conditions, when setting the ground pressure and temp to match actual weather values. In the calculator, if I use the standard temperature at 12 000 feet, around -24 degrees celcius, I have the same values for tas than the ones I measured in dcs, with similar weather conditions than standard. So I m happy, all seems consistent. The screenshot above shows a temperature of 20 degrees at 12 000 feet. Therefore it explains the difference with my tests in dcs. For the fun of it, making the calculation with 20 degrees celcius at 12 000 feet means you will be in a really hot atmosphere, like 60 degrees celcius on the ground. I don t think this place exists yet. If the calculator and dcs do work as I think now, I m happy, all is consistent. And this shows dcs is actually quite representative of what an aircraft sees in real conditions. And we surely can close the topic. If not, then huh huh. I m still missing something. Thanks and see yah!

Strange, I did not find the same results. I had twice less... EDIT : Got it! Strange as it may, you have to change the temperature by yourself in this tool. It is not per standard atmosphere model, or so it seems.

Hello again, Definitely spot on @Dragon1-1. I went back to theory, and indeed, TAS (True Air Speed) depends on altitude (pressure). I totally forgot about all that. As we are doing a substraction to assess his speed, we don't mind about wind, and therefore ground speed difference will be equal to true speed difference (unless we have a different wind at each's location !!!). Assessing the bandit speed is a bit more tricky than what I thought then. I'm sure there is a formula, the same kind of thing as for Mach depending on altitude. But I did a quick test in DCS to get rough numbers and define a rule of thumb. My findings : At sea level, TAS = IAS. At 10 000 feet, 300 knots TAS = IAS +45 knts At 10 000 feet, 500 knots TAS = IAS +60 knts At 20 000 feet, 300 knots TAS = IAS +100 knts At 20 000 feet, 500 knots TAS = IAS +125 knts So, to evaluate bandit's speed based on closure rate, my rule of thumb will be : Sea level : bandit = closure - my_speed 10 k : bandit = closure - my_speed - 100 20 k : bandit = closure - my_speed - 200 This way, you know if bandit is slow or fast, and you can choose 1 or 2 circle. Thanks again, it felt good to go back to "good old physics laws". JAR Thanks !

Right, but not sure the difference between ias, tas, gs would be so much, specially with no wind. We were a bit high, around 12k feet. At sea level, it should be very close (the same ?) if I remember well. I ll play the replay and double check with ground speed indicated in tid in both aircraft. I ll keep you posted. But I think you are spot on. Thank you for your quick reply. It helped me moving forward on my issue.

Hello all and Heatblur team, I was doing some BFM training with friends. I was assessing bandit's speed to verify he was on the target briefed speed. I checked radar on TID and the closure rate. There was approximately 100-150 knots difference compared to what I calculated. My formula is simple : bandit speed (IAS) = closure rate - my speed (IAS). Is my formula incorrect ? Is it something normal ? Maybe I did not read the numbers correctly ? Ex : me = 460 kts, closing rate = 1050 kts, bandit calls on the radio he is at 460 kts. Not 590 ??? Thank you for your help. I did not find anything on the forum nor Internet. JAR PS : We do have 1 mod installed on our server : "range targets mod". Would that introduce a glitch possibly ? PSbis : track file is 110 Mb, I cannot send in the forum, but I'll be happy to share a link for download.

I recommend it. Beautiful drawings and nice tribute.

Ejection handle is now operational. Easy and cheap with a pull lever switch. I can share the 3d prints design if some are interested. I hate to admit, but it is useful sometimes...

Hi Horns. Don t worry, no offence taken ! Thanks a lot for apology and taking the time to write back. Thank you also for wanting to answer my question on the first hand. My apologies on my side also, as sometimes we can be quick to react on forums. We are all aviation enthusiasts after all. See you!

Well, sometimes, one does not read every post of a thread in detail... Sorry, I don t understand math symbols the way your are using them. Writing a sentence usually is better for understanding, or a simple sketch. Yeah, I m old school. Anywhooo, thanks Joe, much appreciated sharing your library. I did not know a lot of them.

Agreed about the "sterile discussion". Thanks for your reference, the perfect answer to this post. Are you referring to "the pentagon paradox" ? I found several other books. Would you recommend to read it for a tomcat enthusiast? Or is it off subject? Cheers.