Combustion chamber & twin plugs

[RABBITT_Andrew at mv8.orbeng.com.au]

>Does anyone have any references to any work dealing with multiple
>spark plugs per cylinder?

I have seen papers by Alfa Romeo describing development of twin plug 
versions of both their 2-V and 4-V versions of the 2-litre 4.  See 

"SECOND INTERNATIONAL CONFERENCE ON NEW DEVELOPMENTS IN POWERTRAIN AND 
CHASSIS ENGINEERING AT THE PALAIS DES CONGRES STRASBOURG 14-16 JUNE 
1989/1989" - Institution of Mechanical Engineers - UK