[robair]

Gday Steve

Interesting idea, shame it did not work out to your satisfaction, the extra weight would have certainly added to the wing loading, also the propwash would have been taking a most unusual and undesirable path over that big delta wing, all the disturbed airflow would have created your up and down fun as the elevons would have had some pretty weird airflows over them quite different from the undisturbed (and significantly slower) airflow when the prop is behind them. When you think about it having the prop located centrally at the rear would be pulling a nice fast and smooth layer of air over the delta root and fuselage and would give heaps of stability. Having said that I wonder if you could have a motor on the front and back contrarotating?
That'd rip for sure and also probably sound quite unique.

Cheers
Rob Byrnes