Car damaged by hot metal grindings :(

Car damaged by hot metal grindings :(

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Discussion

streaky

19,311 posts

249 months

Wednesday 29th February 2012
quotequote all
CarbonXKR said:
Yes, he has a Phd!

From how close?; we had a Westerly wind about 30-40kts at the time they were cutting the chain from a distance of 15 feet up wind.
Was that 30, gusting 40, or variable?

Streaky

PS - for the landlubbers, that's 34.6 to 46.1 mph - S

Deva Link

26,934 posts

245 months

Wednesday 29th February 2012
quotequote all
CarbonXKR said:
we had a Westerly wind about 30-40kts
Was it really *that* windy - that's about a force 8 gale, isn't it?

Fair enough if it was, but bre careful of quoting specific numbers in any insurance report if they're not supported by local met office reports.


re going to your insurance company - a lot of people on here say not to do that but to my mind that's why I pay fully comp insurance. Someone ran into the back of wifey's car. I called her insurer and they took care of the whole thing. They also waived the excess and told us there would be no effect on the future premium (and there doesn't seem to have been).

Edited by Deva Link on Wednesday 29th February 21:08

CarbonXKR

Original Poster:

1,275 posts

222 months

Wednesday 29th February 2012
quotequote all
Deva Link said:
Was it really *that* windy - that's about a force 8 gale, isn't it?

Fair enough if it was, but bre careful of quoting specific numbers in any insurance report if they're not supported by local met office reports.


re going to your insurance company - a lot of people on here say not to do that but to my mind that's why I pay fully comp insurance. Someone ran into the back of wifey's car. I called her insurer and they took care of the whole thing. They also waived the excess and told us there would be no effect on the future premium (and there doesn't seem to have been).

Edited by Deva Link on Wednesday 29th February 21:08
Yes it was really that windy (Outer Isles, Scotland) and I'm sure I don't need to support that, but if I do I work for the local harbour authoriy and we have met instruments all around so can easy back it up but thanks for your concern.
That's exactly the case with our insurer as stated above in your post. The only come back will be if they find that the uni doesn't have Public Liability insurance then we have to claim off our own and they try to reclaim from them.

KevinA3DSG32

11,635 posts

280 months

Thursday 1st March 2012
quotequote all
CarbonXKR said:
Yes it was really that windy (Outer Isles, Scotland) and I'm sure I don't need to support that, but if I do I work for the local harbour authoriy and we have met instruments all around so can easy back it up but thanks for your concern.
That's exactly the case with our insurer as stated above in your post. The only come back will be if they find that the uni doesn't have Public Liability insurance then we have to claim off our own and they try to reclaim from them.
I am under the impression (or is it illusion) that 3rd party insurance is compulsory?

Marlin45

1,327 posts

164 months

Thursday 1st March 2012
quotequote all
CarbonXKR said:
Yes, he has a Phd!
A post grad let loose with tools! cry

voyds9

8,488 posts

283 months

Thursday 1st March 2012
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daz3210 said:
RYH64E said:
daz3210 said:
Yes I would go so far as to say it is possible that you can't tell the difference. I had to be told by my optician that my lenses weren't actually glass! (when I scratched them I said I thought you need a diamond to scratch glass, only to be told they aren't actually glass 'these days')
So you can't tell the difference between modern glass and plastic lenses, why do you assume that I don't know the difference? And why 'these days'? The incident I referred to was 20 years ago, when glass was glass and the properties of grinding particles was the same as today.

As my old boss used to say, don't assume anything, it makes an ASS of U and ME.
Whatever.

For reference, the optician said glass lenses were phased out in the early eighties.
Plastic spectacle lenses are generally CR-39 (allyl diglycol carbonate) or derivative of.

Polycarbonate lenses are generally used for high impact safety spectacles, some childrens glasses and some rimless. Polycarbonate has a high impact resistance but is surface soft (scratches easily).

Glass spectacle lenses often called crown glass is a borosilicate compound. These are about twice as heavy as the equivalent CR39 lenses, slightly thinner, they have a greater scratch resistance than normal CR39, but are more prone to chipping and breaking with an impact.

CR39 lenses became popular in the 80's due to larger frames available at that time. The larger frames often made the lenses that heavy they became unwearable. CR39 now generally come with a hard coat which iirc is silica, this increases the surface hardness by about a factor of 6.

Glass is is still available and indeed for high prescriptions high index glass (thinner lenses) may well be thinner and lighter than a normal CR39.

Deva Link

26,934 posts

245 months

Thursday 1st March 2012
quotequote all
voyds9 said:
Glass is is still available and indeed for high prescriptions high index glass (thinner lenses) may well be thinner and lighter than a normal CR39.
One of my girls has to have glass lenses.

Whatever they're made of, they're almost always coated now (often with multiple things) and the coating damages pretty easily.

voyds9

8,488 posts

283 months

Thursday 1st March 2012
quotequote all
Deva Link said:
voyds9 said:
Glass is is still available and indeed for high prescriptions high index glass (thinner lenses) may well be thinner and lighter than a normal CR39.
One of my girls has to have glass lenses.

Whatever they're made of, they're almost always coated now (often with multiple things) and the coating damages pretty easily.
It's probably an anti reflection coating (iirc again silica) but only about 1/4 of wavelength of light in thickness (approx 190nm in thickness), reasonably easy to scratch should be cleaned with a lint free cloth (try a camera lens cloth) and if it has dirt on it rinse it under cold water before cleaning. Most scratches as either particles being ground into surface or an abrasive cleaning cloth (ie a jumper or a tissue).

The coatings are generally worth having as they make the lenses look thinner (AR coat), reduce need for cleaning (oleophobic/hydrophobic coat) and increase durability (hard coat).

She may also wish to discuss with her optician contact lenses.

daz3210

5,000 posts

240 months

Thursday 1st March 2012
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Is there any kind of coating that makes them more resistant to steaming up then?

When playing sport this becomes a problem for me.

Deva Link

26,934 posts

245 months

Thursday 1st March 2012
quotequote all
voyds9 said:
She may also wish to discuss with her optician contact lenses.
I'm not quite sure how to respond to that.

voyds9

8,488 posts

283 months

Thursday 1st March 2012
quotequote all
Deva Link said:
I'm not quite sure how to respond to that.
I assumed that the reason she has high index glass is because of the prescription, then contact lenses would give her the ability to play sport, go on nights out etc without worrying about looking after her glasses.

Deva Link

26,934 posts

245 months

Thursday 1st March 2012
quotequote all
voyds9 said:
I assumed that the reason she has high index glass is because of the prescription, then contact lenses would give her the ability to play sport, go on nights out etc without worrying about looking after her glasses.
It's the way you wrote it as if that would never have occured to us.

She wears contact lenses, but has glasses too. I think most contact lens wearers also have a pair of glasses (although probably often not to their current prescription).