DeltaGuy From United States, joined Sep 2001, 4108 posts, RR: 19 Reply 3, posted (2 years 2 months 3 hours ago) and read 1518 times:
Most aircraft of this vintage, as jetlaged said, used a hydro-mechanical fuel control unit. The EEC didn't find it's way into engines till later.
On the engine I work on (P&W F100-220), there is a DEEC (Digital Electronic Engine Control), but on previous models there was an EEC. In either model, a hydro-mechanical fuel control is used for backup in secondary mode (loss of all electrical power). I'm sure other engines of newer design also incorporate such similar backups.
DeltaGuy
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F14D4ever From United States, joined May 2005, 311 posts, RR: 9 Reply 4, posted (2 years 1 month 4 weeks 1 day 14 hours ago) and read 1459 times:
EEC is a Pratt term; GE use FADEC exclusively (at least on the commercial engine side) to designate their digital electronic engine controls.
FADEC was not available on the CF6 series until the advent of the -80C2 variant. CF6 models equipped with FADEC are explicitly designated with an F suffix: CF6-80C2D1F, for example, is a FADEC-equipped engine with a rating plug for the MD-11.
TristarSteve From Sweden, joined Nov 2005, 2354 posts, RR: 12 Reply 5, posted (2 years 1 month 4 weeks 1 day 13 hours ago) and read 1439 times:
Quoting F14D4ever (Reply 4): EEC is a Pratt term; GE use FADEC exclusively (at least on the commercial engine side) to designate their digital electronic engine controls.
EEC Electronic engine control
FADEC Full authority digital engine control.
The RB211-535E and RB211-524G/H both have EEC. As far as fuel control goes they control the whole works elecronically. But both have another means of airflow contol. The -535 has a separate electrical airflow contoller (sorry cant remember its name!), and the -524G/H have a totally analogue system.
When RR moved on to the Trent, they added airflow control to the EEC and it became a FADEC.
Quoting DeltaGuy (Reply 3): In either model, a hydro-mechanical fuel control is used for backup in secondary mode (loss of all electrical power). I'm sure other engines of newer design also incorporate such similar backups.
No, the Trent engines do not have a backup mechanical fuel control. They do have back up electrical supplies.
IFIXCF6 From United States, joined Sep 2004, 102 posts, RR: 0 Reply 6, posted (2 years 1 month 4 weeks 1 day 10 hours ago) and read 1408 times:
"EEC" is not just P&W, as GE90's have an EEC. The CF6-80C2D1F (and all CF6-80C2xxF's) have an "ECU" as the black (actually grey) box. FADEC is the system, and EEC or ECU is the box. -80C2's that do not have an "F" suffix, as explained prior, are not FADEC, and do not have an ECU. They do have a "Power Management Control", which refines the MEC. But it is not "Full Authority", thus not FADEC.
So, having drifted well off course of the original post, no the -50's of the DC10-30 are not EECed, ECUed, PMCed, or FADEC. Cables and rigging only! I hope this helps!
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