See this:
http://news.yahoo.com/s/ap/20060318/...ot/mowers_smog
Guess they wouldn't like our smoke systems much.
I can see it now,
"Super X R/C Plane, only 10 lbs." (catalytic converter may add up to 6 pounds) or,
"Whatchamacallit R/C's new carbon fiber catalytic converter, only 4 pounds (without brackets)."
GRRRR...
AV8TOR