martinboehme
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Everything posted by martinboehme
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Fenix A320 VOR Radial Capture
martinboehme replied to zachlog's topic in Microsoft Flight Simulator (2020)
You can search ASRS for "dual FMGC failure" - I find 21 reports. (You don't need the IRSs to fail additionally - without the FMGC, how would you perform RNAV navigation?) -
Fenix A320 VOR Radial Capture
martinboehme replied to zachlog's topic in Microsoft Flight Simulator (2020)
You can navigate though - you just can't have the autopilot automatically follow the radial. Lots of systems failures cause an increase in workload, and as things go, this one isn't terrible. I'll readily admit, I had exactly the same reaction you did when I flew an Airbus in the aim for the first time and learned it can't track VORs. It seemed so weird - you're telling me it can't do this basic thing? Realistically, though, it's not often an issue in practice. -
I like the free version too. Have GSX as well but never use it as it's just not my cup of tea. The only drawback of the free version is that Fenix warns against its use - hence I'm wondering if the paid version will be compatible. The feature list does make an oblique reference to "compatibility with add on airplanes", but doesn't go into specifics...
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Does MSFS 2020 play well with other sims..?
martinboehme replied to Seahawk72s's topic in Microsoft Flight Simulator (2020)
I have all three of these sins installed on the same machine without any issues. I'm not aware that these sims share any common components, so you should be fine. -
Question about altimeter setting.
martinboehme replied to jt233's topic in Microsoft Flight Simulator (2020)
Got it. Well, that seems workable at least. In Germany, which I'm used to, airspace G only goes to a maximum of 2500 feet AGL - which would be much too restrictive. It's interesting how differently different countries use the airspace classes. -
Question about altimeter setting.
martinboehme replied to jt233's topic in Microsoft Flight Simulator (2020)
Wow... that seems very restrictive. How high does class G airspace go? -
Question about altimeter setting.
martinboehme replied to jt233's topic in Microsoft Flight Simulator (2020)
Huh - that seems very confusing. When I was an active glider pilot, I always converted meters to feet when giving position reports. It's just common sense to fit in when operating in an environment that otherwise uses feet. -
old arrivals and departures
martinboehme replied to dokkemann's topic in Microsoft Flight Simulator (2020)
I don't think @dokkemann has the US government to thank for outdated procedures at ENAT (which is in Norway)? 😉 -
compatibilité avec MSFS2020
martinboehme replied to kalliste2b's topic in Microsoft Flight Simulator (2020)
Of course, this could also be about the Rockwell Commander 112/114 or the Aero Commander 500. I believe there's an MSFS version of the latter, but I haven't found the former. -
ATR 42/72 -600 updated v. 1.0.36
martinboehme replied to turbomax's topic in Microsoft Flight Simulator (2020)
In this particular case it brought to the threshold of the physical runway, in other words the start of the displaced threshold. Hm, so much for that theory then... -
ATR 42/72 -600 updated v. 1.0.36
martinboehme replied to turbomax's topic in Microsoft Flight Simulator (2020)
No, in the default aircraft the distances appear to be fine. In the ATR, the only distance that appears to be affected is the distance from the last waypoint before the threshold to the threshold. But whatever the ATR is calculating, it doesn't appear to be slant range. Going back to the first example that @mryan75 gave, the RNP RWY 11 at TNCC. The distance from ELUVA (the FAF) to the threshold is supposed to be 6.0 nm according to the chart. The ATR reports the distance as 6.4 nm. But this cannot be explained by slant range. Let's calculate what the slant range from ELUVA to the threshold would be, using the Pythagorean theorem. The crossing height for ELUVA is 2000 feet. The airport elevation is 36 feet, the TCH is 50 feet. In other words, from ELUVA to the threshold is a vertical distance of 1914 feet, or 0.32 nm. The horizontal distance, as noted above, is 6.0 nm. Using the Pythagorean theorem, we obtain a slant distance of sqrt(6.0^2 + 0.32^2) = 6.01 nm. In other words, just a tiny bit more than the horizontal distance, and certainly not enough to explain the 6.4 nm displayed by the ATR. This is an interesting observation. From this, it sounds as if not just the distance displayed is wrong, but that the ATR is actually navigating to an incorrect position. If you follow the RNP RWY 11 guidance at TNCC all the way down to 50 feet AAL, where do you end up? Is it about 0.4 nm past the threshold? If so, that would mean that the distance the ATR displays is consistent with the vertical guidance -- it's just using the wrong position for the waypoint. -
ATR 42/72 -600 updated v. 1.0.36
martinboehme replied to turbomax's topic in Microsoft Flight Simulator (2020)
I just did a test of my own with some enroute waypoints, and the distances I get in the ATR check out against what Navigraph shows me. So it looks as if the ATR has an issue specifically with runway waypoints. Interestingly, I note that runway 10 at TTPP doesn't have a displaced threshold -- so the problem occurs not only with displaced thresholds. -
ATR 42/72 -600 updated v. 1.0.36
martinboehme replied to turbomax's topic in Microsoft Flight Simulator (2020)
None of what we're discussing here is about DME -- it's all RNAV. Indeed, there is no DME station at either of the waypoints in question (ELUVA and the runway 11 displaced threshold at TNCC). And the ATR is displaying an incorrect distance between those two waypoints (6.4 nm instead of 6 nm). (Maybe this is what you meant -- but I wanted people to be clear that DME doesn't enter into the picture at all.) I don't think the waypoint for RW11 is necessarily misplaced. You do need a waypoint for the non-displaced threshold, for when you're departing from that runway. I believe it's possible for approach procedures to code waypoints that aren't otherwise accessible by name outside of that approach procedure. I suspect that this is how the displaced threshold is coded; it doesn't need to be provided as a "standalone" waypoint because there is no need to use it outside of an approach procedure. I assume the non-displaced threshold does exist as a standalone waypoint because you need it when departing from that runway (and you might not be departing on a SID, so the non-displaced threshold can't be coded merely as a waypoint that is "internal" to the SID). Edit: As to the question of why the ATR is displaying the wrong distance -- could it be that the ATR's distance calculations are just generally wrong? Has someone checked with a two enroute waypoints and compared against the result from another source? -
ATR 42/72 -600 updated v. 1.0.36
martinboehme replied to turbomax's topic in Microsoft Flight Simulator (2020)
Just checked, but no... apparently a leg from ELUVA to TNCC is 7.3 nm (according to the GNS 430 in the default 172). -
ATR 42/72 -600 updated v. 1.0.36
martinboehme replied to turbomax's topic in Microsoft Flight Simulator (2020)
I first thought it might be computing the distance to the runway midpoint rather than the threshold, but runway 11 at TNCC is longer than two times 0.4 nm. Maybe it's computing the distance to the ARP? Should be relatively easy to check... if you create a leg from ELUVA to TNCC, how long is that leg? -
BeyondATC Traffic Injection v2 Video
martinboehme replied to Tuskin38's topic in Microsoft Flight Simulator (2020)
I'd go beyond that. I enjoy flying on VATSIM and consider myself reasonably proficient. When there's a good number of controllers and pilots online, nothing beats VATSIM. But there are times of day and areas of the world where VATSIM can be pretty barren. It can feel a bit pointless making Unicorn transmissions that no one hears, and lonely parking up on an empty ramp. For those situations, I'm hoping Beyond ATC will provide an immersive option. I'd say, irrespective of how much experience someone has, it's really a prerequisite to become familiar with an airport one hasn't flown into before. Professional pilots do exactly this. So don't feel like your preparation is a sign of "noobness" - it just means you're doing exactly what a real life pilot would do. -
You'd be shocked. Apparently, some incorrigibles are still flying the Stearman, which first flew 90 years ago! (Sorry, this one was just too good to resist... 😉)