[ROVERNET - UK] P6 windshield differences?

Sat Mar 8 07:00:44 GMT 2008

Thinking about it a bit more, the clear (heh) advantage of the 
laminated window is with a rock strike or the like. A toughened 
window would craze into a opaque patchwork and visibility would be 
severely impaired.Then if it blew in to the car you got 10 lb? of 
glass chunks in your face and lap. Not a fun prospect at speed. They 
tried to beat the problem with various zones that fractured into a 
pattern big enough to see through, but in the end they were obsolete 
by the 80s through regulation.

And now for something different: I was once called in to advise a 
glass artist who had a commission for a hanging glass sculpture for 
an airport. It consisted of a number of curvy panels reminiscent of 
the Aura Borealis, at least the parts of it I saw, and the panels had 
to be laminated glass for safety. So this fellow was setting up to do 
his own laminations. The plastic layer is made of polyvinyl butyral, 
and one of his problems was bubbles in the plastic, caused by the 
plastic absorbing  moisture from the air which would then create the 
bubbles when he vacuum bagged and heated them each panel in an oven 
to bond them. I was there to advise on vacuum bagging and to try and 
solve the moisture problem (due my experience in thermoforming 
polycarbonate, which has similar troubles). We did solve all the 
problems, and presumably the sculpture (I forget where is it, 
somewhere in Canada) is still  hanging.

Back to Rovers.

I can see 10 rear screen part numbers, toughened clear or Sundym with 
or without a defroster grid printed on the inside (4) and laminated 
clear and Sundym with or without a fine wire defroster element twixt 
the laminations, and later the defroster grid printed on the inside. 
(6)

And I have a few more part numbers for front screens, this from a 69 2000 book:

toughened, RH drive 367195, same LH drive 367196, in Sundym 367197 & 
367198 (these are early cars, up to C suffix on TC's. It is curious 
367195 matches the number MIchael has a suitable for all years)

toughed, zebra zone, 369246 & 369247 clear and  Sundym

finally. laminated 368517 & 368518, clear and Sundym

Now a real find would be a laminated front screen with the fine wire 
defroster, they made a few of those for the rally cars.

Yours
Vern

>Well, certainly in the early days laminated windows were not 
>necessarily a safety improvement over a toughened window. In fact, 
>given a small enough impact area, say the top of your head (extreme) 
>or your hand, it was possible to puncture a laminated window and 
>suffer very nasty lacerations or near amputation. Another nasty 
>feature was that laminated windows tended to release short, small 
>slivers of glass. OTOH, the big dangers of the toughened window was 
>the cloud of small rectangular glass pieces that flew about, and, 
>with the window gone completely, the danger of outside things 
>getting in or you being ejected from the car.
>
>I have suffered injuries from both styles over the years.
>
>Yours
>Vern
>
>
>
>>These are all windshields?  That is, they go on the front of the car?
>>
>>Fact remains, they are all the same shape, tinted or not. 
>>Aftermarket windshields could be square or purple, but they will 
>>only fit the car if they conform to the factory dimensions.
>>
>>I'm surprised that Rover would have installed an unlaminated 
>>windshield on a car they were selling as a safely designed vehicle. 
>>I can see the back window being non-laminated, but not the front 
>>windshield.
>>
>>Does your book also show the heated rear window with the defroster 
>>wires built in?
>>
>>Glen
>>
>>
>>
>>Vern Klukas wrote:
>>>>Folks I have found the answer in the rover bibles.
>>>>I have factory parts manuals for 2000's (1966) 2200 (1975) & 3500 (1973)
>>>>
>>>>There are FOUR windscreens listed They apply to all years of production
>>>>2 are heat treated #367195 clear  & #371796 tinted
>>>>2 are laminated    #371793 clear  & #371794 tinted
>>>>
>>>>There is an additional pr in the 2200 manual for Norway
>>>>
>>>>I would suggest the laminated screens which were not compulsory 
>>>>in Britain and were primarily for the American market where I 
>>>>think they were required.
>>>
>>>Exactlly right, though laminated screens were also promoted for 
>>>the home market as a safety upgrade.
>>>
>>>I wonder if Peter may of gotten his impression of different 
>>>screens because the rear and front screens are close in size and 
>>>shape, unlike most cars where the rear is markedly different from 
>>>the front.
>>>
>>>Yours
>>>Vern
>>>
>>>>
>>>>Michael Pellow
>>>>Rover nut
>>>>2 46 10 hp
>>>>1 49 6light 75;
>>>>1 60,80,95,110
>>>>1 3ltr MkII  manual Coupe
>>>>1 3ltr MkII auto saloon
>>>>1 68 2000 TC with wires
>>>>3 3500 manuals
>>>>1 5spd 2000 SD1
>>>>1 5spd 3500 SD1
>>>>1 1999 2.5 connoisseur 75
>>>>
>>>
>>>
>>
>>
>>_______________________________________________
>>rovernet mailing list
>>rovernet at lyris.ccdata.com
>>To unsubscribe, go to this web page, look near the bottom and 
>>follow instructions:
>>http://mailman.nipltd.com/mailman/listinfo/rovernet
>>Back-up list and photos at:
>>http://autos.groups.yahoo.com/group/Rover_net/
>
>
>--
>Vern Klukas                             I'm a little . . .
>Inkspot Type & Design
>vern at inkspotco.com
>
>_______________________________________________
>rovernet mailing list
>rovernet at lyris.ccdata.com
>To unsubscribe, go to this web page, look near the bottom and follow 
>instructions:
>http://mailman.nipltd.com/mailman/listinfo/rovernet
>Back-up list and photos at:
>http://autos.groups.yahoo.com/group/Rover_net/

-- 
Vern Klukas                             I'm a little . . .
Inkspot Type & Design
vern at inkspotco.com