The Duke flight model has all the ingredients of the usual RealAir attention to detail, but with new innovations to ensure that manual handling has the predictable and harmonised controls the Duke is renowned for. In normal operations the controls are slick, smooth and a delight to fly. Stalls are programmed to range from a gentle loss of lift to deeper stalls and if the pilot really pushes the envelope, wing drops, slow spins from elevator only, more pronounced spins with added rudder and of course side slips, for which the Duke is cleared for a duration of 30 seconds. Yet in normal flying conditions the Duke is designed to be stable and a pleasure to fly, with excellent handling in patterns and approaches, finely tuned autopilot functions, excellent ILS capture and with our new free castoring nosewheel option for those with rudder pedals and pedal brakes, superb ground manoeuvring.
The Duke fully simulates one-engine operation after a user-controlled practice engine-failure. Propeller controls can feather the props exactly as in the real Duke. A simulated engine-failure can therefore be practised with all the expected outcomes: Substantial rudder is required to eliminate fuselage yaw and drag, and to keep the turn and slip indicator centred. The correct specification of 300-350 feet per minute single engine climb at gross weight is accurately simulated, with blue line speed critical to maintaining a positive climb rate.
Within Flight Simulator X limitations we have simulated accurate performance variations based on outside air temperature and pressure. Fuel Flow and mixture control is much more realistic than is usually found on the default FSX aircraft and the usual FSX requirement for immediate leaning of mixture with altitude has been adjusted to be more realistic within the constraints of FSX's core programming. The turbocharged engines retain much of their sea level power until critical altitude is reached, and this is reflected in the Duke's ability to maintain high climb rates right up to and beyond 15,000 feet.