The 767's have the differences like the 777 and 744 with some missing the EPR between the CF6, RB, Pratt 4060 and JT9D.
Is this simply the airline's choice of display, such as how some have the round style instruments on the 737 Ng's instead of the tape style such as WN and CO, or how some airlines opt for the V Bar FD over the crosshair, or do the engines differ in a way that some do not have an EPR calculation? Would someone care to explain?
Rick767 From United Kingdom, joined Jan 2000, 2662 posts, RR: 51
Reply 2, posted (11 years 9 months 2 weeks 6 hours ago) and read 2920 times:
"However, the 757 looks like the RB's and the Pratts have the same"
Not quite, the Rolls Royce RB.211 is a triple spool engine and so has EPR, N1, N2 and N3 indications. Pratts don't have N3.
Both the above use EPR as the primary power indication, whilst as Mandala said GE fans (like we have on our 767s) use N1.
This is certainly not airline option (like V-shaped f/d bars and ADI speed tapes etc...) it is all associated with the engines fitted. You will notice A320s with EPR as the primary power reference (V2500? engines) and some with just N1 (CFM engines).
I used to love the smell of Jet-A in the morning...
B747skipper From , joined Dec 1969, posts, RR:
Reply 3, posted (11 years 9 months 4 days 13 hours ago) and read 2793 times:
Nice toys they have in these new airplanes... would (almost) confuse me... My old 747s are still equipped with steam powered gages...
Well, in truth, I often get to fly the airline executives in a little Learjet which is equipped with EICAS and FMS...
You mentioned V bars or crosshairs is not available choice... no no no...
The choice is indeed available... in that Learjet (since I hate V bars), I can press a little switch, and get the ADI display to show crosshairs as I like...
GE From Singapore, joined Mar 2000, 320 posts, RR: 6
Reply 4, posted (11 years 9 months 4 days 9 hours ago) and read 2785 times:
I think Rick was referring to the EICAS displays (primary engine reference) when he said that they weren't airline options/choices. He did mention that the f/d bars and adi speed tapes are a choice.