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"...
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.
It's not going to the Moon.....It's just going to California
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...
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...
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
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...
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...
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...
Was just my... (un) educated opinion...
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.