In article ,
says...


On Mon, 19 Oct 2009 22:20:49 +0200, -b- wrote:

One question beginning pilots frequently ask, and rightly so, is given the
obvious performance effect of two functioning spark plugs per cylinder, why
do
automobile engines not adopt this?

The failure of an auto engine is an apple compared to the failure of an
aircraft engine, the orange. Why don't planes have ABS? And side impact
airbags? And special fittings per fuel types at fuel feeds?


Except that we were talking about performance, not failures, which brings us
back to oranges and oranges.