CosmicCruiser From United States of America, joined Feb 2005, 2045 posts, RR: 18 Reply 2, posted (5 years 6 months 2 weeks 3 hours ago) and read 4253 times:
DeltaGuy From , joined Dec 1969, posts, RR: Reply 3, posted (5 years 6 months 2 weeks 2 hours ago) and read 4243 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.
F14D4ever From United States of America, joined May 2005, 319 posts, RR: 5 Reply 4, posted (5 years 6 months 1 week 6 days 14 hours ago) and read 4184 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, 3489 posts, RR: 36 Reply 5, posted (5 years 6 months 1 week 6 days 12 hours ago) and read 4164 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 of America, joined Sep 2004, 108 posts, RR: 0 Reply 6, posted (5 years 6 months 1 week 6 days 9 hours ago) and read 4133 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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