|Quoting adipasquale (Reply 232):|
I am just a little unclear on the difference between the fuel control on the VC-25 and the 743.
-25 aircraft and the seven built 743 aircraft with CF6-80C2B1 engines have identical fuel controls +PMC
Some history of the thrust control of wide body aircraft engines:
The first and second generation high bypass engines were all controlled by mechanical fuel controls
JT9D 3, -3A and -7 series up to -7Q a, GE
CF-6-6 and -50 series, RR
RB211-22, -524 series up to -524D
A sort of " in between" solution was the mechanical fuel control with an extra digital supervisory module, for more accurate pwr lever respons, added overspeed and overtemp protection
JT9D-7R series, GE
CF6-80A series and CF6-80C2 series (without -F)
Full FADEC or EEC controlled engines
4000, CF6-80C series with -F, CF6-80E series, RR
RB211-524G and up series, RR
Trent series, etc.
Operating a twin over the ocean, you're always one engine failure from a total emergency.