osiris30 wrote:Starlionblue wrote:osiris30 wrote:
Not arguing with you as the physics make perfect sense but am curious why it seems to go wrong so often? (relatively speaking). In aviation we are always trying to improve from best practices. Given today's tech we should be able to better safeguard planes. Even an auto pitch and power button. Something.
Because, as mentioned by INFINITI329, pitot damage can be hard to spot. If a bunch of hornets have decided this would be a neat nesting location you won't see them on a walkaround. And that's one of the reasons some kind of valid airspeed check is done on take-off in everything from a light piston to an airliner.
Pitots by their nature have to be tubes pointed into the wind, and there's crap flying around that can lodge in them, plus icing. If you think about it, the pitot-static system feels a bit agricultural in concept compared to all the solid state tech wizardry we have on board. It is century old tech. Way upthread is a reference to a project developing airspeed measurement without the need for a pitot tube, through some sort of solid state sensing. That would be massively useful.
An auto pitch and power function is an idea. However this would have to be pilot initiated, and if the pilots are going to do something they might as well set pitch and power themselves.
Speaking of automatic backup speed measurement, aircraft like the (newer) 320 and 330 have backup speed scale. If the ADIRUs disagree, the speed scale will revert from pitot-static to a pure AoA scale taken from the AoA vanes. You might not know your exact speed but you know that your AoA is "safe". A great feature. On even newer aircraft like the 350, if the ADIRUs are considered unreliable, the system automatically switches to ISIS data, and if even that is unreliable the system switches to the engine air data system. Yes, engines have their own air data systems.
See those systems are what I am talking about The continuous improvement of systems. As you know that is why aviation is so safe today. I don't accept (nor do I think we should accept) that something is too uncommon to try and fiz provided the fix is reasonable.
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.
Not say this is an end of the world thing but I do think we can do better. TY for the constructive discussion.
Agreed; however, this extra software on many modern aircraft would require some heftier processing power (hardware), but with transistors being smaller these days, there might even be a weight savings compared to the "current" 1988 A320 or 1997 737NG/MAX avionics.
For instance, not sure the old Intel 80186's and and Motorola 68000's on the A320 could handle it alone, and the ancient AM29f CPU's on the brand new 763 freighters would certainly have a fit.