What is its purpose?

[dmdigital]

OK dumb question time...

On the front sloping portion of many vehicle front window frames (including the D2 and Defender) there is a small plastic wedge located about halfway up the window, on the outside when the glass is closed.

What is its purpose?

[Xtreme]

To guide the glass into the groove?

Roger

[rovercare]

To guide the glass into the groove?

Roger

^^^^minus the ?, the groove is the bailey channel:)

[Slunnie]

Yup... more so when you are driving and the air moves the glass into the wrong spot to close properly.

[300+]

I asked the project manager for the discovery at LR about this many years ago. He told me it was related to turbulence control.

I have seen cars which almost trap some water on the side windows at speed in the rain. Perhaps it is to stop that spot of dead air and keep the window clear?

Cheers, Steve

[LOVEMYRANGIE]

It stops the glass from popping out when window is opened at speed. The initial opening induces vacuum causing the glass to move outwards away from the bailey channel. As the windows are flat, not curved, the glass is prone to breaking.
Here endeth the lesson :angel:

[rovercare]

It stops the glass from popping out when window is opened at speed. The initial opening induces vacuum causing the glass to move outwards away from the bailey channel. As the windows are flat, not curved, the glass is prone to breaking.
Here endeth the lesson :angel:

Funny the lesson endeth now, as plenty of vehicles have them, even with curved glass;)

[lokka]

Funny the lesson endeth now, as plenty of vehicles have them, even with curved glass;)

Yep true but all newer stuff now has them as a guide to hold the glass for that first few mm so it dosent get sucked out maby we need it myth busted :p:p:p

[VladTepes]

Hmm, I thought it was to stream all the water out and away from the window so none of it got into the Defender when it rains.

:Rolling::Rolling::Rolling::Rolling::Rolling:

[dmdigital]

Now you see my confusion...

Turbulence control... on most vehicles, it's possible, but on a Defender:confused:
Stop the window moving outwards when first opened... Possibly
Stop the water running in... never worked like that on anything I've ever owned, including the Defenders. Actually it might work on the Defenders, I've just never notice because of the water coming in elsewhere:p

[Slunnie]

Now you see my confusion...

....
Stop the window moving outwards when first opened... Possibly
....


Closing, not opening... so it goes into the bailey channel... :rolleyes:


To guide the glass into the groove?

Roger


^^^^minus the ?, the groove is the bailey channel:)


Yup... more so when you are driving and the air moves the glass into the wrong spot to close properly.

[Bundalene]

OK dumb question time...

On the front sloping portion of many vehicle front window frames (including the D2 and Defender) there is a small plastic wedge located about halfway up the window, on the outside when the glass is closed.

What is its purpose?

I left these out inadvertently when reduilding some doors and the glass left the guide and would jam, when closing the window. After replacing the wedge all was OK.

So what ever else these do they certainly keep the glass in the channel.

Erich.

[dmdigital]

Good to see experimentation paying off. Something I've always assumed was there for a reason, now I know:)

[Scouse]

I left these out inadvertently when reduilding some doors and the glass left the guide and would jam, when closing the window. After replacing the wedge all was OK.

So what ever else these do they certainly keep the glass in the channel.

Erich.My Classic didn't have these from new but after experiencing the problem at freeway speeds, I soon fitted a couple. makes all the difference :).

[rovercare]

My Classic didn't have these from new but after experiencing the problem at freeway speeds, I soon fitted a couple. makes all the difference :).

This issue only ever cam about when they removed smokers (quarter) windows in all cars:(

[p38arover]

I believe LR added them when they went to a thinner glass in the Rangies - post '87 (or later - maybe the '89 model?)

[Poida4x4]

To guide the glass into the groove?

Just need a bit of James Brown for that...

[Bundalene]

Just need a bit of James Brown for that...

:Rolling::Rolling::Rolling::Rolling:

very sharp ....... back into the knife drawer!!!!! :p:p

[VladTepes]

More on Defender aerodynamics on a UK forum....
LR4x4 - The Land Rover Forum > AERO DYNAMICS ANYONE? (http://forums.lr4x4.com/lofiversion/index.php/t24350.html)