This makes the aircraft easy to fly. The rudder set-up requires the pilot to use the rudder pedals, similar to larger aircraft. Direct linkage from the rudder pedals to the nosewheel provides very effective ground handling capability. 640 is provided by an air heater installed on the exhaust manifold. The windshield is kept clear of frost by a defroster system which operates from the heater.
Fresh air is supplied to the cabin through two individual and orientable air inlet vents.