The Queensland businessmen building their own privately-funded public airport have a simple message for Sydneysiders debating the need for a second airport – ‘‘just get on and do the thing’’.

John Wagner and his three brothers are building a $100 million airport west of Brisbane at Toowoomba. It will be opened in October sporting a 2870-metre runway and terminal, just 18 months after construction began.

Joe and Dennis Wagner at their airport construction site at Toowoomba. Their brother John says there is no 'rocket science' in getting an airport built. Credit:Glenn Hunt

‘‘You see governments do report after report [on the need for a second airport in Sydney], and spend millions and millions of dollars on consultants. But there is no rocket science in it,’’ John Wagner said on Monday.

The Wagners are one of Queensland’s richest families, having built their wealth from a construction company which bears their name. Its primary work is on oil and gas projects in Australia and parts of Asia, but it has been involved in airport redevelopments such as that at Canberra Airport.