diesel addict has it
. It is the Hollandair H.A.001 'Libel'
Single-seat Agricultural Aircraft. One 135 HP Lycoming O-290-D2, Four Cylinder horizontally-opposed engine.
In 1957 Hoekstra designed together with JG Velberg of the NMS an agricultural aircraft the 'Hollandair HA-001 Libel' which had been commissioned by the First Groningen Agriculture Sproeibedrijf, whose previous aircraft had crashed. The HA-001 "Libel" made its first flight on July 19, 1957. From 1960 tests were carried out at Zestienhoven Airport. Unfortunately they showed that the aircraft did not comply with the requirements.
It was sold in 1960 to Skylight for Banner towing. With a change of engine the aircraft was ideally suited for this purpose. In 1965 the aircraft hit a tree and was damaged beyond repair.
As diesel addict says - Open House.
Mel