On Jan 8, 2:34*pm, " wrote:
All of that is out there, already available. *But the truth is, it's
not needed; not in the immediate sense.

What IS needed are aluminum head-castings having twice as much fin-
area as what's presently available. *This won't fit on a bug or bus so
there is no start-up money. *Coming up with the cores should have been
done by the EAA -- about fifty years ago. *The fact it wasn't *is good
evidence that it won't.

Bob...don't Jabiru use heads machined from billet stock?