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MG Midget and Sprite Technical - Aeroscreen Project

Hi everyone,

So I know you can buy Brooklands aero screens (not my favourites) and proper, full on race polycarbonate screens from Peter May etc. great products I'm sure but far too pricey for me.

I'm after making a very short aeroscreen from polycarbonate, using the bottom rail of an original midget windscreen as a base (same rout dimensions as the one in the picture, perhaps a bit shorter).

The only thing is, what's the thickness of the glass used in the frame? I can buy 4, 5, or 6mm thick plastic from my local supplier.

Any tips from anyone on anything else?!

Thanks as always,

Josh

Josh Spooner

The glass in my 1977 Midget 1500 is 5mm Triplex. But the thickness is pretty approximate and varies across the screen.
Nick Nakorn

Why not make up a simple bent aluminium or steel angle to mount the plastic aero screen? And then pop rivet this to the car.If you do not want to buy thicker pop rivets to mount the plastic to the frame you could always use plastic number plate bolts and screws.

For info 4mm thickness is the minimum for screen thickness motorsport in the Uk (see regulation J5.520.08:
http://msauk.org/uploadedfiles/msa_forms/bluebooks/14/144_152_Common_Regulations_for_Competitors_(Vehicles)_(J).pdf)

Some examples of screens:
http://austinhealeyspritemk2.blogspot.co.uk/2013/09/austin-7-special-pictures.html

And full range of aeroscreens
http://www.completeautomobilist.com/categories/complete-automobilist-auto-accessories-aeroscreen-and-wind-deflector

Cheers
Mike
M Wood

Josh

750 Motor Club racing cars have similar homemade screens, such as on Formula 750, 750 Trophy and Locost 7, e.g.
http://www.naddervalleyclassics.co.uk/index.asp?section=15&page=433

http://www.750trophyracing.co.uk/drivers-cars.html

Cheers
Mike


M Wood

http://www.spritespot.com/gallery/toomanyspridgets/d578_3

http://www.spritespot.com/gallery/albums/toomanyspridgets/d578_3.sized.jpeg


Saves time if you make it bolt-on without having to get under the dashboard.
r thomas

I love that, I really do. I just don't know if they'd let me through scrutineering with that in standard road going class for MSA sanctioned Sprints. Daniel?
G Lazarus

Gary I see wider difficulties; usually 'roadgoing' class needs current MOT etc. However it has a screen but no w/wipers so won't pass MOT like that.
David Smith

I made a simple aluminium bracket for the Sprite, as I was thinking of going topless. I 'stretched' it to fit the curve of the scuttle

Dave O'Neill 2

David,
My car is MOT exempt :0)
G Lazarus

David. I checked with the MOT tester and he showed me that if you can see over the screen then there is no legal requirement for wipers. Besides, they'd need to be an inch long to keep them for falling over the top. Passed the MOT every year, although I did print off a copy of the relevant page to keep in the glovebox, just in case.

http://www.motuk.co.uk/manual_820.htm
r thomas

All good info guys, thanks;
'where there's a will there's a way'
David Smith

Could you not cut the glass very very carefully with a diamond cutter as used for cutting tiles/ceramics etc.?!

Perhaps a dangerous and fun Prop-esque experiment if you are going to chuck the glass in the bin anyway :-D

Malcolm
M Le Chevalier

Although finding a tile cutter big enough could be an issue. That's what would make it fun! ha ha.

Prop, come on, back me up on this mad idea!!
M Le Chevalier

Diamond cutting wheel on a pneumatic cutoff tool and a water line to keep it cool and patience and luck = success cutting down a glass windshield.
Trevor Jessie

How about this with wipers too?

A de Best

Pritty cool isn't it?

He made it out of thick materieal, first one he made flexed to much on speed.

A de Best

otherwise he just shortened a standard frogscreen.

Btw, the wipers were useless the owner told me but good enough to get him thrue MOT then(2008).


A de Best

This thread was discussed between 27/08/2014 and 30/08/2014

MG Midget and Sprite Technical index

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