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Forum: Tech Log

20th Oct 2014, 00:47

Replies: 50

A Challenging Endurance Problem

Views: 21,272

Posted By hawk37

Adam; "endurance is independent of altitude...

Adam;

"endurance is independent of altitude even for jets" only applies if you consider two things:

1. there is no additional drag on the aircraft due to compressibility, and

2. the fuel...

Forum: Tech Log

19th Oct 2014, 21:31

Replies: 50

A Challenging Endurance Problem

Views: 21,272

Posted By hawk37

Andrewgr2. When I said max endurance will...

Andrewgr2.

When I said max endurance will not be at minimum drag speed, I was primarily meaning that the minimum drag would be at low altitude, at the speed for L/D max. If one believes that...

Forum: Tech Log

19th Oct 2014, 18:44

Replies: 50

A Challenging Endurance Problem

Views: 21,272

Posted By hawk37

Yes FE Hoppy, to get max endurance as the OP...

Yes FE Hoppy, to get max endurance as the OP requested, it does seem best to be at single engine and almost a high as possible.

Forum: Tech Log

19th Oct 2014, 16:44

Replies: 50

A Challenging Endurance Problem

Views: 21,272

Posted By hawk37

Gentlemen; 1. Re "AdamFrisch". Max endurance...

Gentlemen;
1. Re "AdamFrisch". Max endurance will not necessarily be at least drag for a 777. Max endurance will be at minimum fuel flow, and minimum fuel flow will be a function of not only...

Forum: Tech Log

19th Oct 2014, 13:04

Replies: 50

A Challenging Endurance Problem

Views: 21,272

Posted By hawk37

Clearly, you would need detailed performance...

Clearly, you would need detailed performance tables for the aircraft in order to answer WindTunnel's question. For starters, is there a holding table giving fuel flow at various altitudes based on...

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