Indian Air Force’s Sarang helicopter aerobatics team is working hard to put up a good show with their daring manoeuvres over the weekend at the Singapore Airshow to showcase a spectacular display of flying skills and aerobatics, a senior official said on Friday. The five-day Singapore Airshow is being held from February 20-25 at the Changi Exhibition Centre and has over 1,000 participating companies from more than 50 countries and regions, according to organisers.