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Search: Posts Made By: hawk37
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Forum: Tech Log
15th Jul 2004, 11:32
Replies: 38
Views: 28,127
Posted By hawk37

Old Smokey When you say M crit is below max...

Old Smokey
When you say M crit is below max range cruise of .82 for the 777, is this for typical high weights? If so, then at TOD when light, max range cruise has decreased but M crit will have...
Forum: Tech Log
2nd Jul 2004, 03:07
Replies: 38
Views: 28,127
Posted By hawk37

Sorry, I'm not up to speed on nomenclature. Can...

Sorry, I'm not up to speed on nomenclature. Can someone fill me in on what a B738 is?
I heard 737's were restricted to FL 370 and below, perhaps not true.
If it's a relatively new aircraft,...
Forum: Tech Log
28th Jun 2004, 16:37
Replies: 38
Views: 28,127
Posted By hawk37

Victor. 1. I'm wondering if you're actually...

Victor.
1. I'm wondering if you're actually talking about what is called the drag divergence mach number, in which case .80 seems ball park for the dc9 series. Mach crit is below this, as Smokey...
Forum: Tech Log
28th Jun 2004, 01:40
Replies: 38
Views: 28,127
Posted By hawk37

"The DC-9's fuel consumption would increase too...

"The DC-9's fuel consumption would increase too much to make it efficient to fly above the critical mach number. Which occurrs on the DC-9 around .8m"

Victor, I'm not familiar with the 9, but I...
Forum: Tech Log
31st May 2004, 00:06
Replies: 38
Views: 28,127
Posted By hawk37

Catpinsin, I'm having a little trouble...

Catpinsin, I'm having a little trouble understanding your first sentence, however I will offer this quote from J d Anderson's Introduction to flight

" the airfoils on modern subsonic jet...
Forum: Tech Log
25th May 2004, 23:15
Replies: 38
Views: 28,127
Posted By hawk37

Milt, Yes I meant C of P, as in “high subsonic...

Milt, Yes I meant C of P, as in “high subsonic flight (actually transonic would be a better term) will give an aft movement in C of P, not C of G. thanks, and I corrected the post.

Herc Jerc, we...
Forum: Tech Log
24th May 2004, 12:40
Replies: 38
Views: 28,127
Posted By hawk37

Jack Airliners routinely cruise above M crit. ...

Jack
Airliners routinely cruise above M crit. The development of the supercritical wing allows this with little drag increase, initially. And they do not become longitudinally unstable, if flown...
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