AIRCRAFT BUILDERS EUROPE - Key Persons


Johan Koekkoek

Job Titles:
  • Sling Owner
Johan owns the Sling TSi with callsign PH-KJZ. In cooperation with Paul, he was involved in the building process of that fantastic aircraft during 2021 where he experienced first hand the magic of building your own aircraft. Within Aircraft Builders Europe Johan is responsible for sales and company management. As an enthusiastic Sling owner Johan travels to customers around Europe for promotion and demo flights.

Paul Versteeg

Job Titles:
  • Workshop Manager
He is a pilot since 1986, owning his own Kappa. His experience with Sling: building the PH-KJZ, the present demo TSi of Aircraft Builders Europe. Both mechanical and avionical technologies in the Sling Aircraft are part of his experience. Within his position as manager of the Aircraft Builders Europe workshop, Paul assists buyers of quickbuild Sling aircraft in our Aircraft Builders Europe workshop. As experienced pilot, Paul is as well involved in demoflights from Airfield Middenmeer or Airfield Texel.

Wilmer Koonstra

Job Titles:
  • Sling Aircraft Engineer
Since 4 years he personally assisted Sling buyers during the building of 4 SlingTSi aircraft. Both mechanical and avionical technologies in the Sling Aircraft are part of his experience. In the past he was involved in the building of other experimental aircraft. Within his position as Sling Aircraft engineer, Wilmer assists buyers of quickbuild Sling aircraft in our Aircraft Builders Europe workshop. Besides he manages the test flight process at Airfield Drachten.