 However, inclement weather and other factors prevented the group from jumping onto the Weston-on-the-Green drop zone.Following a quick refresher course conducted by the school's chief parachute jumping instructor, the paratroopers embarked on the twin engine Britten Norman aircraft and a giant biplane—the Antonov AN-2 Colt.Despite marginal weather and high winds, the mass parachute drop was made without casualties onto the airfield using round G-Q military type parachutes.