"Brian Gaff (Sofa 2)" wrote in message
...
I'm sure we have all heard of the sacrificial lamb, but I don't think that
is what Bill means.

How about those shotgun cartridges in some seat belts that go bang and
lock the belt. I was in a vehicle when one of those went off.
Then there are air bags in cars, You wont get them back in for a second
use will you? Other parts of a car that crumple to avoid passing on the
energy to the occupants. Lower stages of conventional rockets that are not
retrieved. Heat shields on the capsules.

Spray booth paiint that you can just peel off and re apply.

Vacuum cleaner bags?

Candle wax on candles.

Those last few are more consumables.

"Rod Speed" wrote in message
...
Bill Wright wrote
I was trying to think of all the sacrificial things. Sacrificial anodes
on ships, yes. But... how about the face of a wooden mallet? Because the
reason it's wood is because steel would be too hard. Because the wood is
softer it's more likely to get damaged.

Stretching a point?

Yep, particularly with plastic headed mallets etc.
A wooden gramophone needle, which wears out quickly but doesn't damage
the shellac?

Lots of stuff wears out, like car tyres.
Can anyone think of sacrificial things?

Human sacrifice.