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Madabout-Kitcars Automotive FAQ / I have a windscreen on my kit car but it?s not a full height screen. Do I still need a demisting/defrosting device?

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I have a windscreen on my kit car but it?s not a full height screen. Do I still need a demisting/defrosting device?

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Views: 10415
Votes: 3
Comments: 0
Posted: 12 Feb, 2008
by: Madabout-Kitcars ..
Updated: 12 Feb, 2008
by: Madabout-Kitcars ..
This is not an easy one to answer as the height of the windscreen determines whether you will need a demisting/defrosting device or not.
 
The best way of showing the calculations is to quote directly from the VOSA standard SVA guide book.
 
The windscreen "horizontal plane" is obtained by measuring/projecting a line through a series
of datum points (which are based on the requirements of E( Directive 78/317) from the
driving position to its point of intersection with the windscreen.
The driver's seat, if adjustable, should be adjusted to its rearmost/lowest position.
 
i. In the case of a seat with an adjustable back rest, the measurements should be made with the seat back rest adjusted to an angle of 25°, line 'A' being parallel to the centre line of the seat back rest.
 
ii. In the case of a seat with a fixed back rest, the dimensions 'A' and 'B' should be as follows.
 
 
 
 
The windscreen "horizontal plane" is at the point where the projection of line 'C' intersects the windscreen/windshield, or if above the windscreen/windshield, the vertically projected plane of the windscreen/windshield (line 'D').
Got it! thought so
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All the SVA information supplied on Madabout-Kitcars.com is done so on a "best efforts" basis and is meant as an informal guide only. We do no warrant or guarantee the information supplied due to the way SVA guidelines can be interpreted from test centre to test centre and because of changes in SVA guidelines by VOSA that we are not made aware of. It is up to you to satisfy yourself on any aspect of your build and SVA by researching the subject, contacting your kit car manufacturer, VOSA or getting hold of the SVA guide from VOSA and making an informed decision based on those factors.


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