On Sunday, April 12, 2020 at 1:00:05 PM UTC+1, Dave Walsh wrote:
A couple of points: -
(i) On the Antares 20E the pylon is in front of the prop.
(ii) "Bricks" have various glide angles: The Antares20E is 30:1
with the engine up and the prop windmilling so better than
many basic two seat trainers.

Why would the pylon being in front or behind the prop make a meaningful difference? Whichever way, you're either sucking or blowing air through it at a speed proportional to the thrust you're trying to make?