According to Wikipedia:
In 1977, a single standard BN-2 was refitted with Dowty Rotol ducted fans. The ducted fan produced less noise than conventional propeller propulsion. Some structural strengthening of the main wing spar at the root was required due to the extra weight. This aircraft was subject to 18 months of flying trials to test the suitability of the ducted fan as a means of reducing aircraft noise; these tests reportedly demonstrated a 20 decibel noise reduction as well as increased thrust and reduced pollution.
Both are for sale (not by me, just saw them on airplane sale sites).
Ooh That one !
As seen yesterday in BIRK. Oh well, you get the idea
He puts her down with graze …
Took this today at EGKA
One for the electronics nerds: D-IODE
Another remarkable D-reg…
Seen at LKLT this morning:
There was also
OK-HEL (an EC120)
OK-VFR (a presumably VFR-only C172)