On Aug 12, 3:25*pm, Winston wrote:
Ed Huntress wrote:
Maybe everyone knows about this engine but me, but if not, this is a very
cool little piece of machinery worth looking into. It's the rotary-valve
4-stroke used in the Honeywell hovering drone that's being prepared for
field use by the US Army:

http://www.nytimes.com/2009/08/12/bu...l?ref=business

Wow! That *is* cool!
I wonder if the rotating cylinder is prepared with
a cross-hatch or an axial hone pattern?

--Winston


And this is to be "almost" as cheap as a 2-stroke engine???

In whose dreams? Somebody got paid off.

Wolfgang