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Forum: Tech Log

8th Aug 2018, 10:26

Replies: 330

The Windward Turn Theory

Views: 50,671

Posted By Goldenrivett

Brercrow...

Brercrow (https://www.pprune.org/members/477529-brercrow)

In diagram A) you say VG = VA +/- W: Therefore difference = 2W.
In diagram B) you say VG = W +/- VA : Therefore difference = 2VA.

In A...

Forum: Tech Log

2nd Aug 2018, 06:59

Replies: 330

The Windward Turn Theory

Views: 50,671

Posted By Goldenrivett

estimation of distance (height) by the angle subtended at one's eye.

Hi Ian W,

Relative to you, the aircraft had to accelerate from 0 to 120 kts (change of 120 kts). Relative to the aircraft it had to accelerate from 60 kts heading North say to 60 kts heading...

Forum: Tech Log

23rd Jul 2018, 15:39

Replies: 330

The Windward Turn Theory

Views: 50,671

Posted By Goldenrivett

Hi Vessbot, I am definitely not a...

Hi Vessbot,

I am definitely not a windward turn theorist. My reply was to your confused post #109

You haven’t walked through a “”1000 KT self created wind shear”, you have only changed your...

Forum: Tech Log

23rd Jul 2018, 11:47

Replies: 330

The Windward Turn Theory

Views: 50,671

Posted By Goldenrivett

Errrr.....by my maths, that is going from 499 kts...

Errrr.....by my maths, that is going from 499 kts to 501 kts ground speed i.e 2 kts change in ground speed with respect to both earth and to the aircraft.

What momentum is being ignored?

Forum: Tech Log

14th Jul 2018, 12:50

Replies: 330

The Windward Turn Theory

Views: 50,671

Posted By Goldenrivett

But will it? Say you are walking towards the...

But will it?

Say you are walking towards the truck at 5 Km/Hr relative to the ground then stop. Your change in KE relative to the ground is 0.5*m*V^2 say 25 units.
Relative to the frame of...

Forum: Tech Log

13th Jul 2018, 10:42

Replies: 330

The Windward Turn Theory

Views: 50,671

Posted By Goldenrivett

Don't forget we are moving at an average velocity...

Don't forget we are moving at an average velocity of 828,000 km/hr around the galactic centre.
https://starchild.gsfc.nasa.gov/docs/StarChild/questions/question18.html

Thank goodness relativity...

Forum: Tech Log

13th Jul 2018, 09:35

Replies: 330

The Windward Turn Theory

Views: 50,671

Posted By Goldenrivett

Correct. Not quite correct. The V^2 can...

Correct.

Not quite correct. The V^2 can be relative to whatever reference frame you want. In free flight the easiest reference frame is the air mass you are flying in. Hence it is possible to do...

Forum: Tech Log

12th Jul 2018, 09:23

Replies: 330

The Windward Turn Theory

Views: 50,671

Posted By Goldenrivett

Hi FlightDetent, I agree, Newton's laws...

Hi FlightDetent,

I agree, Newton's laws still apply. But you have to be careful to consider what the momentum and energy is relative to.
If the downwind myth were true, then doing a loop in a...

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