On Thu, 23 Jul 2009 11:42:28 -0400, "Eisboch"
wrote:


"Frogwatch" wrote in message
...


I am sure somebody has done work on piezo-ignition but I have never
seen it.
A lawn mower was featured in Popular Mechanics about forty years ago.

You'd think it could be set to fire at some specific level of compression.
Piezo crystals emit a voltage when a rapid pressure is
applied, they are the things used in cig lighters that do not have
"flints".

Many of the throwaway lighters are in fact, refillable, and in many
cases, see through, so you know when. Too bad the sparkers fail early
and often. Always just after you put in a full four grams of butane.

Casady