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Forum: Tech Log

6th Nov 2014, 14:07

Replies: 22

747 EEC in Alternate Mode

Views: 9,622

Posted By tdracer

As I noted before, the FADEC EEC will protect...

As I noted before, the FADEC EEC will protect rotor speed redlines, even in alternate mode. Only if there are faults that are affecting the EECs ability to control the engine is there any risk of a...

Forum: Tech Log

6th Nov 2014, 03:42

Replies: 22

747 EEC in Alternate Mode

Views: 9,622

Posted By tdracer

OK, intentionally being a bit anal here, but...

OK, intentionally being a bit anal here, but since you're pointing out inaccurate (although commonly accepted) nomenclature...
FADEC EECs don't "fail", at least not and keep the engine running. ...

Forum: Tech Log

6th Nov 2014, 01:10

Replies: 22

747 EEC in Alternate Mode

Views: 9,622

Posted By tdracer

Cosmo, don't confuse absolute limits with...

Cosmo, don't confuse absolute limits with 'certified limits'. Redline is a certified limit. However the engine manufacture has to demonstrate that the engine won't structurally fail until (IIRC) at...

Forum: Tech Log

5th Nov 2014, 21:51

Replies: 22

747 EEC in Alternate Mode

Views: 9,622

Posted By tdracer

Cosmo While "Overboost" may not be a...

Cosmo

While "Overboost" may not be a technically accurate term for exceeding the max rated thrust, I've been working turbofan propulsion systems for over 37 years, and it's the commonly accepted...

Forum: Tech Log

5th Nov 2014, 18:47

Replies: 22

747 EEC in Alternate Mode

Views: 9,622

Posted By tdracer

Jammedstab, the explanation is simple. Don't...

Jammedstab, the explanation is simple. Don't confuse overboost with overspeed.

It has nothing to do with alternate mode (other than the fact that you need to be in alternate mode to significantly...

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