I was out on a drive today for the first time in a long while and where else to go but an airport to hope to see an aircraft or two more closely than I normally would. I started at Billund Airport (EKBI) and I saw a landing plane which I at the time thought might be a Piper Saratoga for some reason (as you know I'm not good with Piper names) what struck me was that it almost sounded like a turboprop, I could clearly hear a fair sized turbo spinning over the drone of the low-revving piston engine. After searching for pictures to confirm it was a Saratoga I found out that with a T-Tail it seems to go under the name Lance but otherwise looked pretty much like the plane I saw. Is it really true the turbo on a turbo-normalized piston aircraft engine can be heard so loud or was it perhaps a gasturbine (turboprop) conversion? Btw, to clarify then I was at a stop at the side of the ring-road going around north of the airport and planes landing come in just a few hundred meters above the surface going diagonally across to land so it was fairly close, but I still think that turbine-sound was unusually noticeable.
Frank