Cutting and drilling lead

[John Rumm]

I have certainly watched someone cut lead with a hardpoint jacksaw.

[John Rumm]

Some folks block stuff with gmail reply to addresses in the erroneous assumption that means the post was from GG.

[tony sayer]

In article , dennis@home scribeth thus

So you'd presume that its safe to use out in the open as it were...

[Chris Wilson]

Roger Mills wrote in news:92l62cFbh3U1 @mid.individual.net:

It won't "not" work, what you might want to do is once you've stated and a hole begins to form is fill it with talcum powder. I do a lot of work with white metals (lead alloys for making models) - using talcum powder saves a lot of files and whilst it'll still stick it will stick less

[dennis]

I expect its quite safe as long as you keep it wrapped in something suitable.

[Andy Wade]

IME, yes. Use an ordinary twist drill - preferably a really sharp one.

[Gib Bogle]

Lead ;-)

[Chris Wilson]

Gib Bogle wrote in news:iq4h0p$p0h$2 @speranza.aioe.org:

Iraqi tank crews?

[dennis]

I was thinking of paper bags.

[Cash]

_______________________________________________

[Andy Webber]

Citation? How about

?

Depleted uranium typically has around 0.3% to 0.2% 235U by mass, although the Nuclear Regulatory Commission in the US defines DU as uranium in which the percentage of 235U is less than 0.711% (NRC, 2000)

Depleted uranium Sources, Exposure and Health Effects Department of Protection of the Human Environment World Health Organization Geneva April 2001

[Andy Webber]

Not only, but also DC-10 (and none of them fell out of the sky or burst into flames, did they [2]), TriStar and various helicopters [1]. And, no doubt, endless military aircraft.

[1]

[Andy Webber]

According to the World Heath Organisation [1] they are normally plated with Nickel or Cadmium (oh, so that's all right then!) or sheathed in aluminium alloy. Which is OK for ordinary handling, but in the event of a crash and fire it could still cause problems [2].

[1]

[DerbyBoy]

With full dust collection faciliites. Highly toxic material.

What about a long cylinder full of Mercury (see other posts about mercury container!)

[tony sayer]

In article , dennis@home scribeth thus

No its not wrapped in anything special just some thin ally...

[The Natural Philosopher]

its so weakly radioactive that it wont generate any measaurable activity above background.

[Roger Mills]

Yes, I'm perfectly aware of what I'm doing, without needing to see the headers. I set up the gmail address explicitly for this purpose. News.individual.net prefer you to use a real return address, so I created a throw-away one which I could dispose of if it became too spam-laden. As it happens, Gmail has very good built-in spam filers, so very little spam makes it to my inbox - and people *can* reply off list if they really want to.

It's important to realise that using a gmail return address is *not* synonymous with posting via Google Groups. Maybe you need to refine your filters?

[Perhaps someone other than 'Cash' could reply to this so that Cash can see it if he/she is still blocking gmail].

[Chris Wilson]

Roger Mills wrote in news: [e-mail]:

No :-)

[Dave Liquorice]

B-)

Mercury is only 2g/cm^3 denser than Lead so the added agro is probably not worth it. Hg 13.5g/cm^3, Pb 11.3g/cm^3.

Gold would be better 19.3g/cm^3 that's higher (just) than uranium.

[Dave]

Spent uranium is used extensively in the aerospace industry, mainly as ballast, I don't know why it was used on the tail of a jumbo though.

The ballast is used to ensure that the center of lift from the wings coincides with center of gravity, otherwise you can end up with an unstable aircraft.

All aircraft have to be accurately weighed as one of the last phases before its first flight. The aircraft is de-fueled at its correct flight attitude and this information is fed into the flight computers.

HTH

Dave