 The aircraft's nosewheel is free-castoring and directional control while taxiing is by mainwheel differential braking.DA40s are produced at Diamond's aircraft factories in Wiener Neustadt, Austria and in London, Ontario, Canada.A joint venture has also been set up in China with Shandong Bin Ao Aircraft Industries for production of the DA40 TDI (Diesel) in Shandong Province.