frmrCapCadet wrote:My point, a small independent GPS showing ground speed, heading, location, elevations (for aviation) seems to me essential for any sort of transportation.
For navigational purposes, I would agree, and the Max has it. But for airplane handling? No, because GPS give ground speed, and airplanes fly with ground speed. The problem is wind... That's why Airbus rely on BUSS when the ADRs get drunk, and use AOA instead of airspeed.
amishfarmer wrote:Can anyone enlighten me on this pertaining to the 737? If this has been addressed already sorry for repeating it.
737NGs and MAXs, just change ADC to ADR, and you got a similar way to deal with it when in the air. The question here is, did they manage to isolate the faulty ADR or not?
Zeke wrote:I could believe Airbus training the JT crew for their A330s, however not for the 737s.
The training is under Airbus partnership with Lion Air. Even the pilot recruitment requirements are "set by Airbus"...
This did cause a bit of a fuss early 2017 when we had fresh CPLMEIRs being rejected by Lion after the Airbus side of the partnership started to get Lion to accept their recruitment new standards. However, this is no guarantee that you'd still get bad apples coming in.
salttee wrote:No, ADS-B is not exclusively GPS-derived.
In Indonesia, a GPS-based ADS-B is now mandatory in RVSM airspace since end of May 2017. Non GPS-Based ADS-B has caused enough problems over here by transmitting erroneous/inaccurate positions with defeats the purpose. I've seen non GPS-based ADS-B equipped aircraft transmitting ADSB positions that are more than 0.5NM away. We're better off getting them switched off when it's not GPS-based.
salttee wrote:Is it true that there are many ADS-B features that are not used by all aircraft or all customers?
True. Unfortunately, I cannot discuss them in the open like this without checking my NDA on the subject. However, I can say that freely available literature is out there. You can get a LOT of stuff from ADS-B, provided it's done correctly.
sccutler wrote:A poster above seems to believe ADS-B out data somehow includes pitot/static-derived data; it does not. The location, speed and altitude information transmitted by ADS-B units (whether 1090ES or the 978UAT) is exclusively GPS-derived.
The basic data is. When not GPS based, those basic data will be IRS or FMC based... which can be visually toxic when displayed in a crowded aispace. However the pitot-static derived data exist and is transmitted, provided the aircraft has that version. 737Max ADSB, at least the ones that fly here, has them.
osiris30 wrote:With the correct software you could calculate a lot of data off engine performance for example These software changes add no weight and little long term cost.
Good news for you, A350 has that, in the extremely unlikely event your ISIS gets screwed up too. However, it has it's limitations. I have yet to read the detailed literature on it though. Am not sure if this is standard or an option.