PPRuNe Forums - one engine out trap situation

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tks Willie..
Your contribution has been deeply apreciated.
best! :ok:

No problem,

I hope you can get some clear information disseminated over your way. Ciao.

Quote:

Originally Posted by john_tullamarine (Post 9634523)

The idea to simply circle in a climb sounds good

OEI, you need to factor in the loss of climb gradient in a turn and the very large turn radius for a small angle of bank. Good idea but generally doesn't cut the mustard.

If you can't clear the terrain, you have no choice but to circle. Just use the scenario of an airport in a bowl(or large cirque). You will be turning and able to climb or if, not....then descend.

Quote:

Originally Posted by john_tullamarine (Post 9634499)

I am talking about using the EGPWS terrain function which paints a nice picture of the terrain around you and its altitude relative to you.

Didn't work too well, for instance, at Mt Erebus ? OK, I'm being a tad facetious. However, the EGPWS terrain databases are not worldwide and, I suspect, not of sufficient accuracy to support OEI planning. Better than nothing, certainly.

Erebus was well before EGPWS map display of course, but the database is active for most of the places where most of us are flying to. Use what you got if you need it.

you have no choice but to circle

Choice was foregone when the takeoff was commenced without a comprehensive and quantitative escape plan. Winging it on the fly is not a good option. Particularly for those with lots of twinjet time .. it is very easy to lose track of just how much climb gradient goes with the lost engine ..

You will be turning and able to climb or if, not....then descend.

OEI climb gradient generally is pretty poor. As soon as you bank, it's much the same as being heavier straight and level .. climb decreases .. hence the usual 15 degrees limit to put a cap on the loss. Put yourself into a situation where you HAVE to turn inside the far wall .. and you a very likely to be descending quite noticeably .. and, probably, with a predictable outcome shortly after.

Erebus was well before EGPWS map display of course

I really should stop trying for any levity in my posts .. generally falls flat.

Quote:

Originally Posted by john_tullamarine (Post 9637024)

I really should stop trying for any levity in my posts .. generally falls flat.

...its all in the timing.

Quote:

Originally Posted by jt

I really should stop trying for any levity in my posts .. generally falls flat.

Tell me about it! I keep forgetting how serious this forum is, and that forgetfulness has caused me problems...