PPRuNe Forums - Search Results

Search: Posts Made By: Tailspin Turtle

Showing results 1 to 13 of 13
Search took 0.00 seconds.

Forum: Tech Log

8th Jun 2011, 15:29

Replies: 2,070

AF447 Thread No. 3

Views: 613,023

Posted By Tailspin Turtle

DHU Strictly speaking, both are still...

DHU

Strictly speaking, both are still airfoils, producing both lift and drag as long as there is relative wind, which there was. Control surface movement will still alter their lift and drag...

Forum: Tech Log

4th Jun 2011, 17:53

Replies: 2,070

AF447 Thread No. 3

Views: 613,023

Posted By Tailspin Turtle

How could you conclude that I was assuming that...

How could you conclude that I was assuming that the 151 or 152 knots of "airspeed" was being sensed by the on-board systems when I noted that: "Also, the aircraft airspeed measurement system will not...

Forum: Tech Log

4th Jun 2011, 16:14

Replies: 2,070

AF447 Thread No. 3

Views: 613,023

Posted By Tailspin Turtle

Airspeed

There appears to be some differences as to the definition of airspeed. As far as I know, it's the speed in the direction that the airplane is going because that's what determines lift. By that...

Forum: Tech Log

3rd Jun 2011, 15:46

Replies: 2,070

AF447 Thread No. 3

Views: 613,023

Posted By Tailspin Turtle

A Cautionary Tale of Expecting Too Much

About a decade or so ago, I was involved in the substitution of a digital engine fuel control for the old but very reliable hydro-mechanical control on a single (turboshaft) engine helicopter. In...

Forum: Tech Log

3rd Jun 2011, 14:46

Replies: 2,070

AF447 Thread No. 3

Views: 613,023

Posted By Tailspin Turtle

Thanks. My bad again. I should have written...

Thanks. My bad again. I should have written neutral point instead of center of lift.

Forum: Tech Log

3rd Jun 2011, 13:50

Replies: 2,070

AF447 Thread No. 3

Views: 613,023

Posted By Tailspin Turtle

Note that skydivers, before they open their...

Note that skydivers, before they open their parachutes, have a glide ratio at a very high angle of attack, just not a very good one. With a fabric "wing," the glide ratio improves. Click HERE for an...

Forum: Tech Log

3rd Jun 2011, 04:03

Replies: 2,070

AF447 Thread No. 3

Views: 613,023

Posted By Tailspin Turtle

Consider my first graphic to be the general case...

Consider my first graphic to be the general case on the way down and the second to depict the flight condition at impact with the difference being the angle of attack. Of course, the actual angle of...

Forum: Tech Log

3rd Jun 2011, 02:38

Replies: 2,070

AF447 Thread No. 3

Views: 613,023

Posted By Tailspin Turtle

My bad. The BEA report doesn't give an angle of...

My bad. The BEA report doesn't give an angle of attack at impact. Solving for it: http://img.photobucket.com/albums/v354/ththomason/A330DiagramGroundSpeed.jpg

Forum: Tech Log

3rd Jun 2011, 02:01

Replies: 2,070

AF447 Thread No. 3

Views: 613,023

Posted By Tailspin Turtle

Or for simple folk... ...

Or for simple folk... http://img.photobucket.com/albums/v354/ththomason/A330Diagram.jpg Note that the ground speed for the given pitch angle, angle of attack, and 10,000 fpm rate of descent is...

Forum: Tech Log

31st May 2011, 01:10

Replies: 2,070

AF447 Thread No. 3

Views: 613,023

Posted By Tailspin Turtle

I have thought from the beginning that a deep...

I have thought from the beginning that a deep stall was very unlikely, but it appears that the pilot flying managed to unknowingly stabilize the airplane in a very similar flight condition. I don't...

Forum: Tech Log

30th May 2011, 13:20

Replies: 2,070

AF447 Thread No. 3

Views: 613,023

Posted By Tailspin Turtle

Rob21 Also, according to the interweb, some...

Rob21

Also, according to the interweb, some Brit aeronautical publications reportedly use angle of incidence to refer to angle of attack.

Forum: Tech Log

30th May 2011, 12:57

Replies: 2,070

AF447 Thread No. 3

Views: 613,023

Posted By Tailspin Turtle

Rob21 In (American) aeronautical engineering...

Rob21

In (American) aeronautical engineering English, incidence is the angle between the wing and the fuselage. With the exception of a very few airplanes, it is fixed. Angle of attack is the...

Forum: Tech Log

28th May 2011, 20:00

Replies: 2,070

AF447 Thread No. 3

Views: 613,023

Posted By Tailspin Turtle

Inexplixable Happens

An acquaintance of mine was once making a routine test flight in a helicopter under development. In the brief, he had been reminded by engineering that high-inertia rotor blades were installed (not...

Showing results 1 to 13 of 13