HB-YNG —

Super photo.

Given the "Y" as the first letter in the Swiss registration, this is an experimental/amateur build aircraft.

Great shot!

Little WACO?? where is it? Vevey??

Thank you all... :-)

@serge LOTH: It is over the Lake Neuchatel (between Neuchatel and Cudrefin)

Not a Waco but a highly modified Skybolt called the Culp Special designed by Steve Culp in Shreveport LA KDTN.
Using the basic Skybolt design and extending the gear and lengthening the fuselage, but most of all, mounting a Russian Vedeneyev M14P 9 cylinder 360 HP engine.

I would assume the name on the side is the builders name.
Very nice photo and plane.

Superb Shot................