Funny thing,
I was just installing a new set of spark plugs and noticed that there is a
set of installation pictures on the stock NGT spark plug..  the last
picture is a big red X through a picture of an airplane.  Specifically, we
should apparently not use these spark plugs with motor gliders or
ultralights.  So I think regular experimental airplanes should be OK.  :-)

--
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net

What is that some web sites say?  "Things our lawyers make us say."

I wager this is something the legal department invented to head off a
class of lawsuits.
sdorr