"Dan Thomas" wrote

A fan is more weight and complexity and another failure point.

Weight, I doubt it, if you calculated the trade off in extra weight of the
exhaust system. Complexity? A Fan is complex compared to a unknown system
using exhaust to get good airflow for ground operations? Pleeze. Failure
point. If the damn fan does not work, you overheat while you are on the
ground, and don't take to the air. How often do those fans fail? The
junkyards are full of working ones on wrecked cars, that have not failed.

None of those are welcome in a light airplane, especially with all the
propeller blast that can be employed with minimal drag if enough
informed thought goes into the design.

Exzacary. Using airspeed and prop blast while at high power settings, with
the design optimized for minimal drag at flight speeds, means something else
for ground operations. Corky favors exhaust augmentations, while I think a
fan is a better idea. No covincing me that it is any more complex than
that.

--
Jim in NC