Yes, I was thinking of the none pumped carbs (Non Diaphragms). But they might make a good side bar.

I'm thinking like the merit of the airbleed carb verses the automatic mixture control (AMC). How does changing the placement of the discharge port effect fuel draw enabling some midrange adjustment (i.e., Super Tiger or OS) Also what are the limitation of the twin needle , verses the tube over slot or even the slotted disk (i.e., Perry and Enya), be them manufacturing, theory or operation. I'm even willing to go as far back as Ernie Kratzhet's Bramco carb on how it work and what were the nuances one needed to extract the finer point. I'd like to explore some of the unpopular carbs like the Fox butterfly. (by the way I had great success with then).

I'd even like to get into model specific issues. Basically if it is carb related I think it is fair game for this thread. One of my concerns is that so many sport fliers really don't know a thing about their carbs. Looking at what has died in the market place because of the ignorance of us the modeling public has me very concerned that in the end all we will have on the shelves is mediocrity. I point to the loss of so many 3 mixture carbs and the inflight mixture adjustment. With the fact that the piece part cost of many carbs is often just as high as the cost for the entire engine system I think a dedicated discussion is warranted.

All the best.

Konrad