Concorde1518 From United States of America, joined May 2001, 746 posts, RR: 0 Posted (10 years 9 months 4 weeks 1 day 5 hours ago) and read 4039 times:
Hi, just wondering if all EFIS-type airplanes can have the single cue and the double cue flight director, because, it doesn't seem like I have ever seen a single cue flight director on the 717, 737 classic and NG, 747-400 or the 777. Do they have the option as well, and just nobody uses it? It seems weird since AA seems to like the V bars, but there is a double cue on their 777.
B747skipper From , joined Dec 1969, posts, RR: Reply 1, posted (10 years 9 months 4 weeks 1 day 3 hours ago) and read 4013 times:
On EFIS planes you have the option to select "v bars" single cue or "cross hairs" double cue flight directors, at least in all the EFIS systems that I have seen... this bearing in mind that when pilots like "one type", they generally hate "the other"...
(s) Skipper
DL_Mech From United States of America, joined Feb 2000, 1761 posts, RR: 10 Reply 2, posted (10 years 9 months 4 weeks 1 day 2 hours ago) and read 4004 times:
The change from single cue to dual cue flight directors is accomplished by pin programming down in the e&e compartment. In fact, most options such as altitude callouts and T-arrangement instruments (such as the Southwests' 737NG) are accomplished this way.
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Rick767 From United Kingdom, joined Jan 2000, 2662 posts, RR: 52 Reply 3, posted (10 years 9 months 4 weeks 1 day 1 hour ago) and read 3993 times:
Every airline will have a preference in this regard and normally the entire fleet will use either a single-cue flight director or the more common cross-hair arrangement.
My airline uses the cross-hair display on our 757/767 fleet, and I have never used any other type so couldn't comment. In theory it would be no different though, once you had got used to it.
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Jetguy From , joined Dec 1969, posts, RR: Reply 4, posted (10 years 9 months 4 weeks 19 hours ago) and read 3964 times:
I second what Skipper said. I've used both types and personally, I much prefer the single-cue V bars. I think that it's a much more intuitive presentation, but then that's just my personal opinion.
Modesto2 From United States of America, joined Jul 2000, 2634 posts, RR: 6 Reply 5, posted (10 years 9 months 4 weeks 17 hours ago) and read 3944 times:
I once spoke with an AA pilot who pointed out that the single cue bar allows for bank commands. Can any pilots comment regarding this issue?
B747skipper From , joined Dec 1969, posts, RR: Reply 6, posted (10 years 9 months 4 weeks 15 hours ago) and read 3938 times:
Just expressing a (personal) opinion and the reasons of my preferences...
xxx
I have flown both basic display types, mostly the "single cue - v bars" initially, but later I started to take a preference for the "dual cue - cross hairs"... The single cue seems to be more "simple" to fly the commands, basically the idea is to "match" or to "fly formation" with the v bars... the cross hairs maybe require a little thinking process...
xxx
For accuracy however, particularly for "bank commands", I find the cross hairs a little more "accurate", in a sense that a mere "needle width" of a deflection of the "vertical bank command bar" seems to be easier to see (is it my vision going bad at my age...) than the equivalent command of a "slight bank" with the "v bars"... the end result is that I feel I perform with much more accuracy with the cross hairs... We practice 100 feet DH for ILS without autopilot, I personally do an excellent job with "cross hairs", with the "v bars" it takes me longer to see the small "v bar" correction command inputs
xxx
I fly very long legs and often after 11 or 12 hours, coming from South America to Europe, in winter often requiring approaches to minimums, and obviously, thanks for the autopilot... I admit that "v bars" when I am very tired, if I have to fly without the autopilot, is a little easier... all our 747 passenger planes have cross hairs, but our single 747 cargo has v bars... so we pratice both...
xxx
As an instructor, I spend a lot of time in training... 90% of the pilots I know love one type of flight director and absolutely hate the other... and I often see pilots who rather fly "raw data" even though more difficult, just because the type flight director they have is not their favorite...
xxx
The management of the airline has a little Learjet 31 with EFIS-FMS and at times I have flown that aircraft I enjoy a lot (except that I flare at 50 feet in the air, on approaches... ) and I love the fact that it is possible to select one type of flight director display or the other, by merely pressing a button...
xxx
Was just my... (un) educated opinion...
(s) Skipper
411A From United States of America, joined Nov 2001, 1826 posts, RR: 9 Reply 7, posted (10 years 9 months 4 weeks 11 hours ago) and read 3925 times:
First used a "flight director" on the DC-6, was called the Sperry Zero Reader, worked great. Always have preferred the Sperry (crosspointer) display, especially for low visibility approaches.
Collins "V" bar...phooey.
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