does the airplane really try to trim your cross control out in the flare or does the logic know its in a flare?
No and yes. I'll preface this by saying just fly the airplane like any other and you'll be fine, but here goes from what I remember. The airplane transitions to 'Flare' mode during the landing which is basically a submode of Direct Law. Direct Law being direct stick to surface movement without FBW autotriming and protections. The plane takes a snapshot of things at 30 ft RA and then over the next 7(?) seconds it begins to slowly introduce some down trim based. It's basically an electronic feel computer that creates some of the natural feel that we all get when an airplane is in ground effect during the landing. In normal law during most flight phases except TO and landing, the plane autotrims and there was concern that such a 1g feeling might feel unnatural during landing and cause overcontrol from what I was told. In roll under Normal Law, the plane will hold whatever bank angle you apply up to 67 degrees whenever the stick is released with automatic pitch trim up to 33 degrees. While this is all nice to know, especially in an emergency, practically speaking I found it irrelevant when I flew the plane. I just learned it's tendencies and flew it like anything else. From what I remember on a typical X-wind landing like most Airbii it didn't take much rudder pedal input to straighten it out, and the plane had a natural aerodynamic tendency to dip the wing a little bit for you meaning that most of the time it didn't take much aileron input to be properly cross-controlled. In fact, I often saw people from other airplanes over control it and wrestle themselves into oscillations. On the other hand, there are times in gusty crosswinds where you can end up with full side stick to get the input you want which can be uncomfortable both from the standpoint of being at the stop and because the airplane usually doesn't require such large inputs on the stick. All in all, I found it to be the easiest transport category plane I've flown to land nicely in a X-wind as long as you waited to down low before trying to decrab. As with everything pilot, there are differing opinions and your mileage may vary
No and yes. I'll preface this by saying just fly the airplane like any other and you'll be fine, but here goes from what I remember. The airplane transitions to 'Flare' mode during the landing which is basically a submode of Direct Law. Direct Law being direct stick to surface movement without FBW autotriming and protections. The plane takes a snapshot of things at 30 ft RA and then over the next 7(?) seconds it begins to slowly introduce some down trim based. It's basically an electronic feel computer that creates some of the natural feel that we all get when an airplane is in ground effect during the landing. In normal law during most flight phases except TO and landing, the plane autotrims and there was concern that such a 1g feeling might feel unnatural during landing and cause overcontrol from what I was told. In roll under Normal Law, the plane will hold whatever bank angle you apply up to 67 degrees whenever the stick is released with automatic pitch trim up to 33 degrees. While this is all nice to know, especially in an emergency, practically speaking I found it irrelevant when I flew the plane. I just learned it's tendencies and flew it like anything else. From what I remember on a typical X-wind landing like most Airbii it didn't take much rudder pedal input to straighten it out, and the plane had a natural aerodynamic tendency to dip the wing a little bit for you meaning that most of the time it didn't take much aileron input to be properly cross-controlled. In fact, I often saw people from other airplanes over control it and wrestle themselves into oscillations. On the other hand, there are times in gusty crosswinds where you can end up with full side stick to get the input you want which can be uncomfortable both from the standpoint of being at the stop and because the airplane usually doesn't require such large inputs on the stick. All in all, I found it to be the easiest transport category plane I've flown to land nicely in a X-wind as long as you waited to down low before trying to decrab. As with everything pilot, there are differing opinions and your mileage may vary
No and yes. I'll preface this by saying just fly the airplane like any other and you'll be fine, but here goes from what I remember. The airplane transitions to 'Flare' mode during the landing which is basically a submode of Direct Law. Direct Law being direct stick to surface movement without FBW autotriming and protections. The plane takes a snapshot of things at 30 ft RA and then over the next 7(?) seconds it begins to slowly introduce some down trim based. It's basically an electronic feel computer that creates some of the natural feel that we all get when an airplane is in ground effect during the landing. In normal law during most flight phases except TO and landing, the plane autotrims and there was concern that such a 1g feeling might feel unnatural during landing and cause overcontrol from what I was told. In roll under Normal Law, the plane will hold whatever bank angle you apply up to 67 degrees whenever the stick is released with automatic pitch trim up to 33 degrees. While this is all nice to know, especially in an emergency, practically speaking I found it irrelevant when I flew the plane. I just learned it's tendencies and flew it like anything else. From what I remember on a typical X-wind landing like most Airbii it didn't take much rudder pedal input to straighten it out, and the plane had a natural aerodynamic tendency to dip the wing a little bit for you meaning that most of the time it didn't take much aileron input to be properly cross-controlled. In fact, I often saw people from other airplanes over control it and wrestle themselves into oscillations. On the other hand, there are times in gusty crosswinds where you can end up with full side stick to get the input you want which can be uncomfortable both from the standpoint of being at the stop and because the airplane usually doesn't require such large inputs on the stick. All in all, I found it to be the easiest transport category plane I've flown to land nicely in a X-wind as long as you waited to down low before trying to decrab. As with everything pilot, there are differing opinions and your mileage may vary
Ok, most all of that is correct, but here is a VERY simple explanation of the flight control laws of an airbus through the approach and landing.....
At 50 FT, it turns into a real airplane! Above 50 ft, if you attempt to cross control the airplane will fight you the whole way. If you dont touch the rudder until you pull the power to idle it all works just fine.
Ok, most all of that is correct, but here is a VERY simple explanation of the flight control laws of an airbus through the approach and landing.....
At 50 FT, it turns into a real airplane! Above 50 ft, if you attempt to cross control the airplane will fight you the whole way. If you dont touch the rudder until you pull the power to idle it all works just fine.
However...for all yall DAL South guys...it's really a bi@ch to handle and will scare you to death the first couple of hundred times you have to do it for real. The Bus is a real handfull to fly. Stay away...stick with Boeings.
As far as the FBW Airbii are concerned, they can all be landed with approx. 5 degrees of crab, and some people do it that way. However it all comes down to technique, I've landed in 25 kts x-wind and was able to fully de-crab with only 5 degrees wing down. When it's done as shown in that pic it yaws all over the place and is not the preferred technique. As stated by earlier posters, when Flare Mode comes in- 50' RA for 320 series and 100' RA for 340- it handles like a conventional aircraft.
However...for all yall DAL South guys...it's really a bi@ch to handle and will scare you to death the first couple of hundred times you have to do it for real. The Bus is a real handfull to fly. Stay away...stick with Boeings.
That's right DAL-S Guys. The Airbus is scaaaaaaaaary. You should ABSOLUTELY stick to Boeings!
That's right DAL-S Guys. The Airbus is scaaaaaaaaary. You should ABSOLUTELY stick to Boeings!
Quote:
Originally Posted by ExAF
However...for all yall DAL South guys...it's really a bi@ch to handle and will scare you to death the first couple of hundred times you have to do it for real. The Bus is a real handfull to fly. Stay away...stick with Boeings.
NO! It looks like too much fun.
Besides, I don't think they'll let us play with it in ATL. Its 88 city down here, slum dog millionaires... without the millions. And I think the 88s will be here when I retire in 35 years or 40, or whatever the age limit is then.
I just wish that everytime they keep talking about "replacing the 9s" they'd just order more 319/320s or get them off someone who at an upstart airline upchuck and ... wait... prank call prank call wrong thread!
So heyas, why do you Delta pilots ask for wind checks all of the time? Scared!? ... whew... back on topic.
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