Trev Borg
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| posted on 9/8/09 at 05:24 PM |
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How much strength in the windscreen
I want to remove the windscren on my MGF, but its been suggested that there is a lot of torsion strength in the screen, and that I should leave it in
situ.
Any thoughts?
I will be adding sone of the later MG TF torsion bars under the bonnet, over the engine covers and between the tunnel and dash
Before you judge a man, walk a mile in his shoes.
By that time, who cares.
You're a mile away, and you've got his shoes
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StevieB
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| posted on 9/8/09 at 05:55 PM |
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I would have thought that a decent cross brace between the bases of the a pillars would be enough to equal or even exceed the strength of the
wondscreen then any additional triangulation would just add even more strength.
However, if you;re trying to save a load of weight by removing the screen and associated bits (wipers, motors etc.) then you need to consider how much
steel you want to add back into the car to make it worthwhile bothering.
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Trev Borg
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| posted on 9/8/09 at 06:21 PM |
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Yep, the weight saving is the thing, but also I want the car look different as well.
this look would be nice 
Before you judge a man, walk a mile in his shoes.
By that time, who cares.
You're a mile away, and you've got his shoes
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Volvorsport
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| posted on 9/8/09 at 08:32 PM |
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make sure its swedish steel !!
windscreens do offer a lot or torsional rigidity , but its only attatched at one end .
www.dbsmotorsport.co.uk
getting dirty under a bus
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StevieB
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| posted on 9/8/09 at 08:41 PM |
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quote:
Originally posted by Trev Borg
Yep, the weight saving is the thing, but also I want the car look different as well.
this look would be nice
I like that idea a lot. Since I'll be selling my Indy soon and my elise is already up for sale, I'm looking for the next project to start
and was thinking about doing something similar to an MG midget, only using an R1 engine as well, like this one that Lynx AE did, but with the aero
look.
I have to say I do like the MGF version though, and I imagine there'd be a whole load less rust to cope with as well...
 
Rescued attachment Midget R1.jpg
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StevieB
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| posted on 9/8/09 at 08:42 PM |
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And a neat R1 installation...
 
Rescued attachment Midget R1 Engine.jpg
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Trev Borg
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| posted on 9/8/09 at 08:54 PM |
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Do you have a midget yet, as Jacko's old one was still up at Owelly's last time i looked.
Before you judge a man, walk a mile in his shoes.
By that time, who cares.
You're a mile away, and you've got his shoes
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coozer
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| posted on 9/8/09 at 09:01 PM |
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Modern cars use the screen as a stress member. Thats why they are bonded in to the shell.
I once heard it said the screen gave 40% of the torsion strength to a Sierra.
That quote maybe horlicks but I understand the bonded in principle of screens on modern cars.
1972 V8 Jago
1980 Z750
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Trev Borg
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| posted on 9/8/09 at 09:11 PM |
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I can understand that for a tintop, but was not sure how muchif any on a convertable.
Its only attached on one edge.
The side windows kinda just lean against the window rubber
Was hoping everyone would say chop it off cos its not needed.
Where can find how much, and if i replace it with fitting stuff elsewhere?
Before you judge a man, walk a mile in his shoes.
By that time, who cares.
You're a mile away, and you've got his shoes
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owelly
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| posted on 9/8/09 at 09:48 PM |
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My Midget is off to it's new home next week!
Just chop the fekin screen off and worry about the rest later.....
http://www.ppcmag.co.uk
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Trev Borg
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| posted on 9/8/09 at 09:53 PM |
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how did i know you would say that.
anyway, do want to borrow the mg now its running?
Before you judge a man, walk a mile in his shoes.
By that time, who cares.
You're a mile away, and you've got his shoes
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iank
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| posted on 10/8/09 at 11:46 AM |
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I say just go for it, but it's not my car to take the risk on. Though I don't believe the screen adds much if any strength to a
convertible, certainly less than a properly executed strut brace.
Here's a similar look in a spitfire.
http://www.canleyclassics.com/triumphmuseum.asp?article=macau.xml
and classic mini
http://www.minispeed.co.uk/classic/index.cgi?task=load&content=cars
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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Trev Borg
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| posted on 10/8/09 at 05:02 PM |
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Yep, i'm liking the look.
Its only a £400 car anyway.
I think I post something on the chassis part of the forum and see if anyone suggests bracing points.
Before you judge a man, walk a mile in his shoes.
By that time, who cares.
You're a mile away, and you've got his shoes
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Trev Borg
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| posted on 10/8/09 at 05:06 PM |
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The core MGF body structure - largely shared with the later MGTF. The green areas are the sill, A- and B-post structures that are key to the whole
body's strength in torsion and bending. The yellow-coloured windscreen rail also plays a role, along with the bonded-in windscreen itself (not
shown).
Before you judge a man, walk a mile in his shoes.
By that time, who cares.
You're a mile away, and you've got his shoes
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