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Forum: Tech Log

23rd Feb 2017, 00:17

Replies: 8

747-400 RB211 Thrust Control From Thrust Hold (65kts)

Views: 2,866

Posted By tdracer

Lock applies to certain inputs (TMC trim, bleed...

Lock applies to certain inputs (TMC trim, bleed debits, OAT), but not to throttle position or closing on EPR (or N1) Command.

The difference is the real world temperature doesn't react...

Forum: Tech Log

22nd Feb 2017, 06:18

Replies: 8

747-400 RB211 Thrust Control From Thrust Hold (65kts)

Views: 2,866

Posted By tdracer

Short answer is "it depends". Some engines will...

Short answer is "it depends". Some engines will increase EPR (or N1) with increasing speed, some decrease (the old hydromechanical controlled engines nearly always decreased, hence the term...

Forum: Tech Log

22nd Feb 2017, 00:35

Replies: 8

747-400 RB211 Thrust Control From Thrust Hold (65kts)

Views: 2,866

Posted By tdracer

At 65 knots, the autothrottle enters a hold mode...

At 65 knots, the autothrottle enters a hold mode ('goes to sleep') - the throttle position will remain fixed, the EPR trim (small adjustments to EPR command intended to line up EPR across the wing to...

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