![]() |
If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
|
#1
|
|||
|
|||
![]()
Jim Stewart wrote in
: Bertie the Bunyip wrote: Much snippage... technique. I have a frined who flies the 777 and he tells me it flies just like an airplane. Ok, I'll bite. What airplanes don't fly like airplanes? Well, some of the older airliners had some interesting and challenging quirks. They were not very speed stable on approach, wallowed around like a milk van and could develop rates of descent on approach that could plant you in seconds if you weren;'t careful. Then there's the FBW Airbusses. Every time I talk to one of those guys I walk away more confused about how the flight controls work than I was before. Others, most of the 4 engine contraptions, for instance, have to be landed wings level. The nmost recent crop handle quite nicely, don't have spool up times stretching towards ten seconds and just generaly are pleasant to handle. The satisfaction in handling the older jets came mostly from tricking them into doing what you wanted them to! Bertie |
#2
|
|||
|
|||
![]()
Bertie the Bunyip wrote:
Jim Stewart wrote in : Bertie the Bunyip wrote: Much snippage... technique. I have a frined who flies the 777 and he tells me it flies just like an airplane. Ok, I'll bite. What airplanes don't fly like airplanes? Well, some of the older airliners had some interesting and challenging quirks. They were not very speed stable on approach, wallowed around like a milk van and could develop rates of descent on approach that could plant you in seconds if you weren;'t careful. Then there's the FBW Airbusses. Every time I talk to one of those guys I walk away more confused about how the flight controls work than I was before. Others, most of the 4 engine contraptions, for instance, have to be landed wings level. The nmost recent crop handle quite nicely, don't have spool up times stretching towards ten seconds and just generaly are pleasant to handle. The satisfaction in handling the older jets came mostly from tricking them into doing what you wanted them to! What did you think of the 727? In my youth I flew a lot as a 727 pax. There was always something reassuring about having 3 people up front and 3 big ole engines in the back. Engines that you could fsking feel when the levers were pushed all the way forward. A real airplane for passengers that love planes. Then there was the time I asked if I could sit up front. The copilot graciously apologized for not being able to let me, but he kindly offered to let me tag along as he preflighted the a/c. Those were the good old days. |
#3
|
|||
|
|||
![]()
On Mar 2, 9:17*pm, Bertie the Bunyip wrote:
Then there's the FBW Airbusses. Every time I talk to one of those guys I walk away more confused about how the flight controls work than I was before. And I hate to tell you this, but it shows. A good friend of mine (and in fact the guy who taught me to fly my Twin Comanche when I bought it) went from captain of the DC9 to 727 to A320 to 757, and has a lot of good things to say about all of them - except for the A320. We're both engineers by training, so it only took him about an hour or two to explain that flight control system to me. Mostly my response was "What?!?!?!?" and "You gotta be kidding." It's a perfect example of what happens when you allow the engineers to design the user interface. It usually turns into something only an engineer will want to use. I saw this video when someone emailed me a link to it - before I saw this thread - and I knew right away what sort of plane it was. I can't recognize them by sight - but from the way it was behaving, it was obvious what the pilot was trying to do - and why it wasn't letting him. Only then did I really believe my friend. I know you mentioned proportional mode upthread - but it does not mean what you think it means. You still can not command a deflection - or anything that would act like a deflection. What you command is a rate. In other words, down low it doesn't do what it does up high (your understanding is correct there) but it still doesn't act like an airplane. You can not slip an A320 - not even down low. Try to find an A320 driver who is trained as an engineer (and not one who scraped by on C's) and he will probably be able to explain it to you. Once you understand it, you will understand why the pilot did what he did, why the crosswing limit is so low, and why you probably wouldn't have done any better. Michael |
#4
|
|||
|
|||
![]()
On Mar 2, 7:57*pm, Bertie the Bunyip wrote:
William Hung wrote : On Mar 2, 5:25*pm, Bertie the Bunyip wrote: wrote : We had a couple of very windy days over here in Europe. Look at a crosswind landing of an A320 at HAM, a near crash: http://www.liveleak.com/view?i=ddb_1204404185 Nice pic: http://www.airliners.net/uf/view.file?id=536882887 &filename=phpOltUWB ... Next time someone tries to tell you that airliners just "kick it straight" when they land, like this guy did, show em this... Bertie Remnds me of this video. *http://www.youtube.com/watch?v=S9M3m1U-QYA I can watch tis all day. Yeah, they are kicking i straight, though they are laying off a bit of the drift by getting the wing down as the flare. The first one has th edownwind wing donw slightly. Remember that this exercise is intended to demonstrate what the airplane is capable of and not to develop technique. I have a frined who flies the 777 and he tells me it flies just like an airplane. His first line flight to LHR had mih landing in a strong crosswind. The trainer next to him asked if he would prefer that he do th elanding, but my friend pressed on and found it easy. Note that in each touchdown, the alignment takes place after touchdown, and that th etouchdonw is positive. the yaw towards alignment is done smoothly and though you can't see it, they are almost certainly introducing full aileron ( smoothly) to keep the wing down and to introduce some very welcome adverse yaw.We used to have to land the 727 like this and though it felt absolutley awful, it worked OK. Bertie- Hide quoted text - - Show quoted text - I heard the Helio also has crabbing gears. Ia that right? For some reason, I don't feel threatened by the heavies like most people seam to be. I some how, even though Ihave never flown ne, think that I can if givemn the chance. I think the big ones would probably be more stable that the 150 that I train in. Do thebig ones give you more or less time to react and plan ahead? Of course, not having any experience in them makes make my opinion just that, only an opinion. Wil |
#5
|
|||
|
|||
![]()
William Hung wrote in
: On Mar 2, 7:57*pm, Bertie the Bunyip wrote: William Hung wrote innews:bff1ba6f-28ab-44c0-884e-85cc : On Mar 2, 5:25*pm, Bertie the Bunyip wrote: wrote : We had a couple of very windy days over here in Europe. Look at a crosswind landing of an A320 at HAM, a near crash: http://www.liveleak.com/view?i=ddb_1204404185 Nice pic: http://www.airliners.net/uf/view.file?id=536882887 &filename=phpOltUWB ... Next time someone tries to tell you that airliners just "kick it straight" when they land, like this guy did, show em this... Bertie Remnds me of this video. *http://www.youtube.com/watch?v=S9M3m1U-QYA I can watch tis all day. Yeah, they are kicking i straight, though they are laying off a bit of the drift by getting the wing down as the flare. The first one has th edownwind wing donw slightly. Remember that this exercise is intended to demonstrate what the airplane is capable of and not to develop technique. I have a frined who flies the 777 and he tells me it flies just like an airplane. His first line flight to LHR had mih landing in a strong crosswind. The trainer next to him asked if he would prefer that he do th elanding, but my friend pressed on and found it easy. Note that in each touchdown, the alignment takes place after touchdown, and that th etouchdonw is positive. the yaw towards alignment is done smoothly and though you can't see it, they are almost certainly introducing full aileron ( smoothly) to keep the wing down and to introduce some very welcome adverse yaw.We used to have to land the 727 like this and though it felt absolutley awful, it worked OK. Bertie- Hide quoted text - - Show quoted text - I heard the Helio also has crabbing gears. Ia that right? Might do. I used to fly a 195 that had them. Awful, really. The 737 has castering mains. It makes it a bit difficult to taxi, actually (just go to to th esupermaket if you don't believe me) For some reason, I don't feel threatened by the heavies like most people seam to be. I some how, even though Ihave never flown ne, think that I can if givemn the chance. I think the big ones would probably be more stable that the 150 that I train in. Well, you don't have to be an astronaut to fly them, but it's unlikely you'd be able to just jump in one and fly it well. You might, and that's a big might, be able to land one if someone were to instuct you every step of the way. They vary from type to type. The newer ones are a bit easier, mostly because of the high bypass fans they have. This makes them effectively a prop driven airplane. The old skinny jet engines had less "traction" and needed a lot of power changes during approach.Newer wings are easier to handle too.Older wings had very flat drag curves and keeping the speed nailed kept your attention. You'd find controlling the pitch and speed a bit of a handful both on departure and arrival in any of them, though. In addition, the ones with underslung engines will have a fairly large pitch trim change with each power change, and if you aren't ahead of the airplane you will have a lot of power changes. This can degenerate to a very mess situation where you're chasing just about everything. They have to be flown solidly "in the slot" on the approach. You can't just chop the power and dive for the runway if you get a little high in the last couple hundred feet. Well, you could, but the result would be pretty nasty. There are fairly narrow allowable speeds for each flap postition. On some airplanes, max speed for the first flap postition might be 230 and the minimum speed for that position might be 210, for instance. With that flap out, you can go down to 190 but the max sped for the next flap setting would be 215, min 170 and so on. That sounds like a lot and it is when you are used to it, but add to this the fact that the flaps wear quickly if you put them out near the max speed and you have an airplane you must keep an eye on, particularly if you're hand flying. Do the big ones give you more or less time to react and plan ahead? Mmmm. You have to think ahead about a number of things much more so than in a light plane. Leaving out instrument departures and arrivals, just handling it requires a lot of procedures.Then there are emerergencies, but if you were going to just go out and do some sunday flying in one like you would in a 150 then the big differences would be knowing the numbers for pitch and power (and there are a lot of them) and being able to visualise the flight path to a finer degree than you are used to. The speed is just a bunch of numbers, it's a scale thing. And since you fly a wider pattern anyway the speed is kind of irrelevant. Just a bunch of different numbers. Even with a 1500 fooot pattern (normal visual size) you would be flying a downwind probably three miles out and be hitting the descent point in finals at about four miles. It;s the numer of things the airplane would demand from you rather than the speed of the thing you'd find a bit demanding. Although, how do you think you'd cope with a 6,000 fpm plus rate of climb during take off or go around? ![]() That's what the 757 wil do lightly loaded. Anyhow, to adress your point, more stable they are not. More lumbering, maybe, but not more stable. But they need to be flown in a more stable fashion. Of course, not having any experience in them makes make my opinion just that, only an opinion. It's do-able, alright. I put a 16 year old from my model flying club and put him an an old 737-200 sim years ago. I gave him about two hours of instruction before we went in and I had to talk him through most of the actual flying, but he did every appraoch and landing pretty well. We were heavily reliant on the flight director (these are little bars that superimpose over the airplane figure on the Attitude indicator that basically give you pitch and bank) and I , of course, was feeding the flight director with the info tha it needed to guide him,. but he did pretty well. The Chief pilot was there and was impressed. Unfortunately the kid had a fairly big color blindness deficiency, but he's a succesful accountant today and has his own glider.. We're trainign up a lot of new hires in work at the moment. The ones who have been flying turboprops and such are getting up to speed pretty quickly, but the lightplane guys are on a steeper learning curve, though they'll get there in the end. As a rule, glider pilots and guys who have flown airplanes that 'need to be flown' ultimately are smootehr and more accurate when they get used to them... So the answer is yes, you could do it, but if you're going to spend money trying it probably best to wait til you get your instrument raing or at least are well along training for one. You'd get more out of the experience. Bertie |
#6
|
|||
|
|||
![]()
On Mar 3, 6:32*am, Bertie the Bunyip wrote:
William Hung wrote : On Mar 2, 7:57*pm, Bertie the Bunyip wrote: William Hung wrote innews:bff1ba6f-28ab-44c0-884e-85cc : On Mar 2, 5:25*pm, Bertie the Bunyip wrote: wrote : We had a couple of very windy days over here in Europe. Look at a crosswind landing of an A320 at HAM, a near crash: http://www.liveleak.com/view?i=ddb_1204404185 Nice pic: http://www.airliners.net/uf/view.file?id=536882887 &filename=phpOltUWB ... Next time someone tries to tell you that airliners just "kick it straight" when they land, like this guy did, show em this... Bertie Remnds me of this video. *http://www.youtube.com/watch?v=S9M3m1U-QYA I can watch tis all day. Yeah, they are kicking i straight, though they are laying off a bit of the drift by getting the wing down as the flare. The first one has th edownwind wing donw slightly. Remember that this exercise is intended to demonstrate what the airplane is capable of and not to develop technique. I have a frined who flies the 777 and he tells me it flies just like an airplane. His first line flight to LHR had mih landing in a strong crosswind. The trainer next to him asked if he would prefer that he do th elanding, but my friend pressed on and found it easy. Note that in each touchdown, the alignment takes place after touchdown, and that th etouchdonw is positive. the yaw towards alignment is done smoothly and though you can't see it, they are almost certainly introducing full aileron ( smoothly) to keep the wing down and to introduce some very welcome adverse yaw.We used to have to land the 727 like this and though it felt absolutley awful, it worked OK. Bertie- Hide quoted text - - Show quoted text - I heard the Helio also has crabbing gears. *Ia that right? Might do. I used to fly a 195 that had them. Awful, really. The 737 has castering mains. It makes it a bit difficult to taxi, actually (just go to to th esupermaket if you don't believe me) Don't they have a locking option? sniped setting would be 215, min 170 and so on. That sounds like a lot and it is when you are used to it, but add to this the fact that the flaps wear quickly if you put them out near the max speed and you have an airplane you must keep an eye on, particularly if you're hand flying. That does sound like a lot of work. Do the big ones give you more or less time to react and plan ahead? Mmmm. You have to think ahead about a number of things much more so than snipped thing you'd find a bit demanding. Although, how do you think you'd cope with a 6,000 fpm plus rate of climb during take off or go around? ![]() I think I would cope with that with a big ****e eating grin, what do you think? :-)))) That's what the 757 wil do lightly loaded. Anyhow, to adress your point, more stable they are not. More lumbering, maybe, but not more stable. But they need to be flown in a more stable fashion. See, that's the term that I have heard from many pro pilots 'more stable' and that gave me confidence. You tell me that it is 'more lumbering', that's probably a more accurate description. Of course, not having any experience in them makes make my opinion just that, only an opinion. It's do-able, alright. I put a 16 year old from my model flying club and put him an an old 737-200 sim years ago. I gave him about two hours of Where do I get in line? :-) instruction before we went in and I had to talk him through most of the actual flying, but he did every appraoch and landing pretty well. We were heavily reliant on the flight director (these are little bars that superimpose over the airplane figure on the Attitude indicator that basically give you pitch and bank) and I , of course, was feeding the flight director with the info tha it needed to guide him,. but he did pretty well. The Chief pilot was there and was impressed. Unfortunately the kid had a fairly big color blindness deficiency, but he's a succesful accountant today and has his own glider.. We're trainign up a lot of new hires in work at the moment. The ones who have been flying turboprops and such are getting up to speed pretty quickly, but the lightplane guys are on a steeper learning curve, though they'll get there in the end. As a rule, glider pilots and guys who have flown airplanes that 'need to be flown' ultimately are smootehr and more accurate when they get used to them... So the answer is yes, you could do it, but if you're going to spend money trying it probably best to wait til you get your instrument raing or at least are well along training for one. You'd get more out of the experience. Bertie- Hide quoted text - - Show quoted text - Thanks for a great explanaton Bertie. Wil |
#7
|
|||
|
|||
![]()
-----------clip---------------
I heard the Helio also has crabbing gears. Ia that right? ------------------------clip----------------------- Wil I flew the Helio Courier (USAF U-10) with castering gear. Felt crazy after landing and nose weather vaned into the cross wind. If you took off with gear unlocked you landed with it unlocked. This was to prevent a malfunction and only one gear locking if you tried to lock in air. Landing with one locked and one unlocked would probably cause an accident or ground loop at least. You could unlock in air for landing as no failure in unlocking system. I played with system to keep current but never had to use it in practice. Big John |
#8
|
|||
|
|||
![]()
On Mar 3, 10:08*am, Big John wrote:
-----------clip--------------- I heard the Helio also has crabbing gears. *Ia that right? ------------------------clip----------------------- Wil I flew the Helio Courier (USAF U-10) with castering gear. Felt crazy after landing and nose weather vaned into the cross wind. If you took off with gear unlocked you landed with it unlocked. This was to prevent a malfunction and only one gear locking if you tried to lock in air. Landing with one locked and one unlocked would probably cause an accident or ground loop at least. You could unlock in air for landing as no failure in unlocking system. I played with system to keep current but never had to use it in practice. Big John Did you fly in 'Nam John? WIl |
Thread Tools | |
Display Modes | |
|
|