Hello again. Here I am with another basic question. What is the differance in using an R/C carb as opposed to one with a CL venturi? If an R/C carb performs o.k. on an aerobatic R/C plane, what is the advantage of a CL venturi on a stunter? I'm not talking world class compitition, just sunday flying. Thanx.......Dan

One advantage is the C/L venturi/needle is simple and reliable, fewer parts, less chance of air leaks, etc.

Simplicate and add lightness - can't remember who said it ... but it works!

Just remember to wire the carb open.  If the thing is closed it will be very hard to start.  I worked for quite a while one afternoon trying to start one. 

Dan,

I'm working through the same issue as we speak.  I've returned to C/L after 30 years of R/C and have several nice .45 sized R/C engines.  I'm in the middle of an engine set up process now, having been grounded by the endless rain/mud.  I found the timing to be too fast on the O.S. 45 and the lap times were crazy fast.  I richened the mixture and went to a 4 pitch prop which made the lap times comfortable.  But...the fuel burn was too much.  I now have the carb linkage rigged so I can adjust the barrel opening to a reduced setting.  When it stops raining, I plan to start over with the leaner setting and gradually close the barrel to get the launch RPM's down to a lower number.  After I find a good flight RPM, I'll lock the barrel in that position.  If that doesn't work, I'll consider the ventura, but I can't see anything wrong with this plan.  Anyone have any thoughts?

Paul