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Forum: Tech Log

6th Nov 2014, 11:11

Replies: 22

747 EEC in Alternate Mode

Views: 9,622

Posted By cosmo kramer

There is a difference between failed and failed....

There is a difference between failed and failed. ;) We can discuss semantics if you like: "The ECC failed (to do it's job in normal mode)" ... "The ECC suffered a failure (causing both engines to...

Forum: Tech Log

6th Nov 2014, 02:26

Replies: 22

747 EEC in Alternate Mode

Views: 9,622

Posted By cosmo kramer

Just want to add, that it is not that I want to...

Just want to add, that it is not that I want to come across pigheaded. I understand your arguments and accept that in some circles, the wording "overboost" may be accepted and unambiguous (though not...

Forum: Tech Log

6th Nov 2014, 01:52

Replies: 22

747 EEC in Alternate Mode

Views: 9,622

Posted By cosmo kramer

Tdracer, let me give an example. If you have...

Tdracer, let me give an example.

If you have a 737-700 with 22k engines the EEC will give you 24k if you advance thust levers to the forward stop. The same engine is capable of producing 27k on a...

Forum: Tech Log

5th Nov 2014, 23:02

Replies: 22

747 EEC in Alternate Mode

Views: 9,622

Posted By cosmo kramer

@Intruder, technically it's still an "thrust...

@Intruder, technically it's still an "thrust limit exceedance", not an overboost. Tdracer's argument that it "might" exceed limit in the compressor is something that we can't know. Probably it is...

Forum: Tech Log

5th Nov 2014, 23:00

Replies: 22

747 EEC in Alternate Mode

Views: 9,622

Posted By cosmo kramer

Re-read 2 times... got what you mean now. ...

Re-read 2 times... got what you mean now.

Still, I stand on my view... people think that an "overboost" is dangerous. The engine doesn't blow up due to a thrust limit exceedance.

Found an old...

Forum: Tech Log

5th Nov 2014, 22:48

Replies: 22

747 EEC in Alternate Mode

Views: 9,622

Posted By cosmo kramer

From what I understand from the above, you are...

From what I understand from the above, you are contradicting yourself... Can you put it into other words?

I mean, your can exceed max thrust without exceeding N1 or EPR. Plus from what I read...

Forum: Tech Log

5th Nov 2014, 21:31

Replies: 22

747 EEC in Alternate Mode

Views: 9,622

Posted By cosmo kramer

If it's the case that engine manufacturers use...

If it's the case that engine manufacturers use the expression "overboost" for exceeding a rotational value, then expression is used even more wrong by the posters above, as they use it to describe an...

Forum: Tech Log

5th Nov 2014, 21:18

Replies: 22

747 EEC in Alternate Mode

Views: 9,622

Posted By cosmo kramer

Are you the spelling police?

Are you the spelling police?

Forum: Tech Log

5th Nov 2014, 21:06

Replies: 22

747 EEC in Alternate Mode

Views: 9,622

Posted By cosmo kramer

"Overboost" is a very inaccurate term for what...

"Overboost" is a very inaccurate term for what you fellas are describing. In fact, not applicable to jet engines. You can "exceed the trust limit" or "overthrust". Too much air is exiting the engine....

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