"Montblack" wrote in message
...
High Performance Aircraft out of Germany - HPA TT62
http://www.hp-aircraft.de/edoc/tech.html

Two Thielert Centurion 4.0 V8-Diesels - turbocharged and liquid cooled.
The engines are positioned side-by-side inside the aft fuselage. Each
engine drives a five bladed prop mounted on a pylon.


....

Wonder if for all the trade-offs and compromises, you gain anything with
one engine and two pylon props?


Maybe this quote on another page from that site tells it all:

quote:
The first flight has been done successfully but the anticipitations (sic)
in the performance dates [sic... probably meant "anticipated performance
data"] of the TT62 could not be shown satisfactorily. The engineers were not
satisfied totally. Now the evaluation has started and that will be a lot of
work.
:unquote