We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember Bruce saying something like:
Exactly so. I used one to put in a floor from scratch where the level was fairly important because of a floor-level window at one end. At the time laser levels were still fairly pricey and this cost about 3 quid for the aquarium air tubing. Worked a treat, and I suppose it's possible there might be up to 3mm error, in practice it's certainly not noticeable.
Bob Minchin explained :
I agree, it limited ability to even be able to read it with any accuracy - makes it nothing more than a gimmick.
A dash of liquid soap mixed with the water overcomes the surface tension and I don't recall ever having a problem with viscosity.
True. A 3mm error across a floor - of almost any size - shouldn't present a problem.
I doubt you would get any better accuracy with a laser level.
Several years ago I tried a domestic laser level - Black and Decker - and found it was about 10mm out over 7 metres. To make matters worse, it was sealed and therefore non-adjustable. Annoying!
We came across this when I was working in the aerospace industry. 8 hangars were built for the US airforce for WWII and development moved into one.
We had to do a test called symmetry and alignment which consisted screwing balls into designated points on the aircraft and using two theodolights and a telescope, along with a rule to hook, or hang from the balls to measure the straightness, or not of the aircraft. This was done so that if it suffered exccess G or had a heavy landing, it could be determined what had got bent, if anything.
With the hangar being fairly close to a tidal river, the concrete floor rafts would rise and fall with the tides.
Dave
In message , "dennis@home" writes
Dennis, the common consensus here is that you are the group idiot
I know you are arrogant but do you really think you and a couple of other idiots represents the group consensus. I don't as they are almost certainly more intelligent than you.
In message , "dennis@home" writes
Not possible dennis
Arrogant and ignorant could possibly be suitable descriptive words.
I have recently had an accident according to the guy who wears the funny clothes in this village. I competently avoided one with forward planning.
Some of VI's recent comments have been most interesting. In his capacity as the local jester, I'm sure that he has worn a plantpot or two.
Oh yes I forgot you intended to hit the kerb.
On Feb 20, 12:18 am, "Andrew Mawson"
We've got loads of mercury:
fringes
spirit
something more exotic?
AWEM
Yes a mercury arc rectifier. There's a few litres of mercury in each of four. The power cable between the two main island of NZ uses them also, plus the Wellington trolley bus system.
I'm confused. I see why viscosity would make it _slow_ but why would the levels not settle down in the end? It's not as if it was grease.
This is why I use a Cowley. It was my grandfather's.
Andy
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