Once again you are completely wrong. OS recommends the #8 for most of their engines in the .25-.61 size range and this in a standard LONG plug.
http://www2.towerhobbies.com/cgi-bin...?&I=LXCB27&P=M

Please get your info correct prior to posting.

the A3 is a hotter version of this plug. It is also a LONG plug. They also tend to burn out a bit faster for the obvious reasons.

http://www.osengines.com/accys/glowplugs.html