▁Between ▁ 1 9 6 4 ▁and ▁ 1 9 9 5 ▁the ▁field ▁was ▁used ▁by ▁various ▁l ighter ▁aircraft , ▁such ▁as ▁the ▁de ▁Hav ill and ▁Canada ▁D HC - 2 ▁Be aver , ▁Pi per ▁J - 3 , ▁H iller ▁O H - 2 3 ▁R aven , ▁A éro sp at iale ▁Al ou ette ▁II ▁/ ▁Al ou ette ▁III ▁and ▁B öl kow ▁ 1 0 5 . ▁In ▁June ▁ 1 9 9 5 ▁De elen ▁was ▁used ▁for ▁the ▁world ▁premi ere ▁of ▁Karl hein z ▁Stock hausen ' s ▁Hel ik opter - St reich qu art ett . ▁ ▁There ▁was ▁less ▁need ▁for ▁the ▁air ▁base ▁after ▁the ▁end ▁of ▁the ▁cold ▁war ▁and ▁in ▁ 1 9 9 5 ▁it ▁was ▁closed ▁as ▁such . ▁The ▁top ▁layer ▁of ▁the ▁run way ▁was ▁removed ▁making ▁it ▁no ▁longer ▁suitable ▁for ▁land ings ▁by ▁heavy ▁aircraft . ▁Its ▁design ation ▁was ▁down grad ed ▁to ▁Military ▁A viation ▁Site ▁De elen ▁( D utch : ▁Milit air ▁L ucht va art ▁Ter re in ▁De elen ). ▁However , ▁it ▁has ▁remained ▁in ▁use ▁as ▁a ▁military ▁site ▁for ▁hel ic opter ▁training ▁and ▁for ▁that ▁reason ▁is ▁frequently ▁visited ▁by ▁various ▁military ▁hel ic op ters , ▁such ▁as ▁the ▁Bo eing ▁A H - 6 4 ▁Apache , ▁Bo eing ▁CH - 4 7 ▁Ch ino ok ▁and ▁Euro cop ter ▁AS 5 3 2 ▁C oug ar