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Forum: Tech Log

21st Sep 2020, 18:04

Replies: 26

A20N Engine Start

Views: 12,979

Posted By tdracer

I don't believe so - the flight control cables...

I don't believe so - the flight control cables and such run through the hinges (one of my work buddies had to the sweat rotor burst for the tightly grouped wiring and flight control cables). The...

Forum: Tech Log

17th Sep 2020, 17:27

Replies: 26

A20N Engine Start

Views: 12,979

Posted By tdracer

That's basically correct - the autostart measures...

That's basically correct - the autostart measures how long it takes of N2 (or N3) to accelerate - if it's too slow it aborts and puts up the ENG X AUTOSTART message on EICAS (and sets a CMC message...

Forum: Tech Log

16th Sep 2020, 18:23

Replies: 26

A20N Engine Start

Views: 12,979

Posted By tdracer

One the 747-400 (with autostart) and the 747-8...

One the 747-400 (with autostart) and the 747-8 you can start two engines at a time - although if you're at higher altitudes you probably don't want to.

Forum: Tech Log

15th Sep 2020, 21:36

Replies: 26

A20N Engine Start

Views: 12,979

Posted By tdracer

What vilas said. The trend for decades has been...

What vilas said. The trend for decades has been for bigger fans and small, faster spinning cores (faster spinning cores tend to be more efficient) operating at higher temperatures, with ever tighter...

Forum: Tech Log

14th Sep 2020, 22:35

Replies: 26

A20N Engine Start

Views: 12,979

Posted By tdracer

Exactly. Not familiar with what Pratt does...

Exactly. Not familiar with what Pratt does (although I'd be surprised if it's much different), but on the LEAP engine, if residual EGT is above a threshold (which it generally will be if the engine...

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