LizardDoggo

I'm finishing WRG and PSG first, so I'll think about putting those up when they're done and republish once I fully complete the project. I agree that changing the waypoint names is unnecessary since now I know they're in a publicly available database, but sometimes it's a little more fun to create and name your own 😄.

Thanks for the heads up about the PMDG. Guess we're stuck using the old approximations until they decide to update their systems to modern standards. I've wondered if I could do the same thing for the Fenix A319, but I would have to look at what their format is, and I still need to finish them for the iFly first. I've been troubleshooting some weird path drawing behavior for the RW10 SIDs that requires putting in the direct-to-fix again when you get on the runway before you can enable LNAV, and not being able to program in SID transitions for some reason. Your method for finding the center point seems much easier, and way more elegant than mine lol. Rather than estimating the point first, I grab the two endpoints in Google Earth from the KMLs I got from FR24 (or just use the waypoints themselves if they're close enough) and then the midpoint so I can put it into my code which spits out the center point. I spent a few nights banging my head against a wall trying to correct for the fact that the earth isn't exactly a sphere, which I didn't really have to do at such small distances, but in the end, it's worth it for the many decimal places of accuracy, even with the very slight inaccuracies that come with using floating point math. That FAA tool will definitely be helpful for cross-checking the waypoints I'm using from the old data. Unfortunately, I don't have access to the charts, so I'm stuck with guesstimating, or even just creating new waypoints. One thing that I've always wondered about is the MDAs for the approaches, since I haven't been able to find any information on those anywhere. I assume since Alaska has procedures that have (to my knowledge) as low as 0.15 RNP, I'd assume they'd be pretty low. I know that you wouldn't be able to say exact numbers publicly, but would you be able to give a ballpark figure I could use?

Like the title says, I've started the endeavor of rebuilding the RNP (AR) approaches of the Alaskan Milk Run. However, instead of just translating the data that was used for the PMDG to the iFly format, I'm updating them to include radius-to-fix (RF) legs based off of real ADS-B data from FlightRadar24. I thought it would be fitting to announce this here since this was the place where simmers of yore (lol) published the original navdata estimates that I am partially basing this upon. Credit goes to @M_Sauce and Trevor Lahey (whose forum username I could not find) for their outstanding work for the NGX. To date, I've completed a handful of SIDs and approaches, so I want to showcase one of them that's out of Wrangell, AK, which I'm calling the ETOLN1. This should be representative of what the SID for a southerly departure off of RW10 should look like. Here's a YouTube video to see the procedure in action. When I first started working, I quickly realized that finding the center point of the circle that makes up the RF leg is actually waaaayyyy harder than I first thought, because latitude and longitude points are not like the X and Y coordinates that you would use on a graph, but are actually angles on a sphere. What that means in practice is that instead of simple algebra, I'd need to use things like vectors, spherical trigonometry, and other types of semi-complex mathematics to calculate the center point of the circle. A bit of research, coding, and beefy equations later, I now have a method that gets me the RF arc with an accuracy of less than 0.02nm from the actual path. However, to avoid any possibility of some nice people in fancy suits coming to my door with some scary paper, I've changed the waypoint names and moved the path ever so slightly, so don't expect this to be exactly like the real deal. For those who are curious, I am not planning to program this into the PMDG at this time, but I will leave the door open for anyone who is crazy enough to do so. I know that there are/were ASA people on this forum (*cough* @Stearmandriver *cough*) that had access to the real procedures when they were authored for the NGX. Are there any still around that would be willing to check my work? Any feedback/comments from anyone would be appreciated!