Tony wrote in news:1186363629.396826.234140
@k79g2000hse.googlegroups.com:

If one uses the Cessna 377 Skymaster as an example, it's pretty clear
a pusher prop is more efficient than one pulling.


No, it isn#t actually. After Cessna sorted out the cooling drag on the
front engine, the performance was identical on either engine. The legend
lives on though!


The data seems mixed
though on q tip props -- any leads as to where there may be quantative
data? What I found suggested the extra length of the prop might just
as well go to increasing its radius as in decreasing end vortix
effects.


I flew a few q tip mooneys as well as standard equipped airplanes. The q-
tip airplanes all performed worse.


Bertie