Belphegor is here...
Very good Gaston … you are correct, well done !!!
The PLZ M-15 was a jet-powered biplane manufactured by WSK PZL-Mielec in Poland for Soviet agricultural aviation. For its strange looks and noisy engine it was nicknamed Belphegor, after the noisy demon.
The aircraft was designed in Poland in response to a Soviet requirement for a new agricultural plane, for use above the very large areas of Soviet farms, the kolkhoz collectives, and state-owned sovkhoz. A requirement was that the new aircraft was to be more modern and efficient than the Antonov An-2SKh and An-2R.
The aircraft was a metal twin-boom sesquiplane, with a jet engine over the crew cabin. Part of lower wings and chemicals tanks were made of a laminate to avoid corrosion. The upper and lower wings were connected with two thick columns which housed the chemical tanks, 1450 L (377 US gal) each. The tricycle landing gear was fixed. The crew was a single pilot; two technicians could be carried if necessary. The M-15 was fitted with spraying and dusting gear, powered with compressed air.
Your turn Gaston