Boy,all of a sudden I'm getting nothing on the list - banishment or weekend?

 

Ed

 

Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC

No, but I thought of something else.

 

The larger the TB, the greater the cross section per degree of shaft rotation. So if all is equal save diameter, the stumble from over-lean surge will always be greater from the larger TB. It will open to a larger cross section than any smaller TB in a smaller movement of the throttle. Conversely, the smaller TB amounts to opening the throttle more slowly for a similar amount of throttle movement. And since slower movement of the throttle is one strategy for avoiding the stumble problem, the smaller TB is already doing that without any thought from the pilot. The same thinking for the progressive 4 barrel carb. Two small holes to start, and as flow increases, two larger holes to get to top power.

 

Lynn E. Hanover