After three years of record jetliner orders, planemakers are bracing for a slowdown in new commitments at the Dubai Airshow which opens on Sunday under the shadow of recently falling oil prices and conflicts in the Middle East. Barring traditional show surprises, delegates attending the biennial Nov 8-12 event predicted a drop in major commercial order announcements as Gulf airlines take stock after expansion. “A lot of airlines have bought aircraft to capture the same growth,” said Ben Moores, senior analyst at IHS Aerospace, Defence & Security.