What did Kate McCann really see in the Children's Bedroom

[Robittybob1]

He was obviously mindful not to disturb a potential crime scene by contaminating the shutter or window.

That whole episode of Gerry and Dianne checking the shutters and yet leaving no finger prints on them has always worried me too.  How is it possible?  That would be a good thing to look at during a reconstruction.

[Robittybob1]

OK so lets see your sums and sketches of what you think happens and why.
It's your show so knock it on the head one way or another.

I have explained it in physical principles.  That is enough. 
If you really feel it requires figures to be applied, could you tell me how much torque is required to move the children's bedroom door?
What is the door area in m^2?

[Robittybob1]

Well he wasn't mindful was he, he changed the crime scene by opening and shutting the shutters.

We've got Kate thinking it was an abduction but I don't see the same conclusion coming from Gerry or the others.
So in their minds there is no evidence to suggest the others thought of the scene as a crime scene.

[Robittybob1]

OK so lets see your sums and sketches of what you think happens and why.
It's your show so knock it on the head one way or another.

If you really feel it requires figures to be applied, could you tell me how much torque is required to move the children's bedroom door?
What is the door area in m^2?

[Alice Purjorick]

I have explained it in physical principles.  That is enough. 
If you really feel it requires figures to be applied, could you tell me how much torque is required to move the children's bedroom door?
What is the door area in m^2?

If figures are not applied it's called guessing.With regard to the torque you must already know this otherwise you are in no position to make a definitive statement regarding the door being moved by wind force.
Jump a figure for a typical internal door being 800 x 2040 with a mass ca 25kg.
Assume mu for hinges 0.25; assume the door and hinges are lined and levelled properly.
Over to you.

[Robittybob1]

If figures are not applied it's called guessing.With regard to the torque you must already know this otherwise you are in no position to make a definitive statement regarding the door being moved by wind force.
Jump a figure for a typical internal door being 800 x 2040 with a mass ca 25kg.
Assume mu for hinges 0.25; assume the door and hinges are lined and levelled properly.
Over to you.

We all know from personal experience doors move in a wind.  We didn't have to do these complex calculations to prove it actually was the wind that did it.

[slartibartfast]

We all know from personal experience doors move in a wind.  We didn't have to do these complex calculations to prove it actually was the wind that did it.

Yes you do, because it is usually a pressure difference rather than a a gust of wind blowing through a door.

[Robittybob1]

Yes you do, because it is usually a pressure difference rather than a a gust of wind blowing through a door.

It could be either.

[Robittybob1]

Finally found some figures  https://youtu.be/7-CYPdI3t9Q

OK that door had a self closing mechanism, but the figure of 5 pounds of force was used.  That could be well over that required for a normally hinged door.

[Robin Banks]

Yes you do, because it is usually a pressure difference rather than a a gust of wind blowing through a door.

It could be either, my back door is a perfect sample.   

[Robittybob1]

Finally found some figures  https://youtu.be/7-CYPdI3t9Q

OK that door had a self closing mechanism, but the figure of 5 pounds of force was used.  That could be well over that required for a normally hinged door.

It is a breeze today and I set up a situation where the bathroom door would blow shut.  The amount of pressure required to stop the door closing varies depending on the wind moment by moment but the  minimum pressure  would be far smaller than 5 pounds pressure.
At no time would I describe the door as slamming, as the wind is not strong enough.

[Robin Banks]

It is a breeze today and I set up a situation where the bathroom door would blow shut.  The amount of pressure required to stop the door closing varies depending on the wind moment by moment but the  minimum pressure  would be far smaller than 5 pounds pressure.
At no time would I describe the door as slamming, as the wind is not strong enough.

When a door is on the move it gathers momentum,  I have witnessed this many times.

[Robittybob1]

When a door is on the move it gathers momentum,  I have witnessed this many times.

Whatever Kate experienced it must be somewhere in between what you experience and what I was playing with today.

[kizzy]

When a door is on the move it gathers momentum,  I have witnessed this many times.

I Have but only with the doors front door open back door slams or visa versa

What i didn't try like in the childrens bedroom   it was not two doors -  it was a door window

Today [windy] i tried it -  the same result open back door front door shut...but

When i opened kitchen window slightly biger than mccans -  but same height window.... front door stayed open.

The gust of wind would have only blown through the window  -  nearly half way up the wall....also the curtain blocking any power of gust.

[Robittybob1]

I Have but only with the doors front door open back door slams or visa versa

What i didn't try like in the childrens bedroom   it was not two doors -  it was a door window

Today [windy] i tried it -  the same result open back door front door shut...but

When i opened kitchen window slightly biger than mccans -  but same height window.... front door stayed open.

The gust of wind would have only blown through the window  -  nearly half way up the wall....also the curtain blocking any power of gust.

Were you closing the door like Kate said she was?