It's not unusual for a discussion regarding a flight simulator's flight model fidelity to start when a simulator, modelling older aeroplanes for which flight characteristics are known, is published. This was the case with the IL- 2: Sturmovik simulator and Cliffs of Dover is no exception. After the simulator was published, critique was perceived on the Internet regarding sustained performance modelling, first and foremost regarding high altitude flight. This problem was remedied to a certain degree by official patches and Team Fusion continued working on flight models in order to accord sustained performance of simulated aeroplanes with sustained performance charts dating back to the time when these aeroplanes were used operationally. Goals were set high concerning the flight model as well, and Cliffs of Dover leaves a pretty good impression in this regard. Currently, the user has an advanced flight model at one's disposal which provides for applying real life air combat tactics, which represents quite a rigorous test when flight modelling is in question, and furthermore, a number of aerobatic maneuvers the simmer may wish to perform will look true to life. Since, in most cases, control devices available off the shelf are used with PC flight simulators, lacking dimensions , force and deflection angles of their real life counterparts, response curves in the sim can be adjusted in an effort to remove the effects caused by the aforementioned differences, and corrections made to stability and control derivatives introduced by Team Fusion apear to have helped with this. Same team corrected ground handling and wheel brake models and, the expectation may not be unrealistic, there will be further improvements.
Since piston engines are the only type of engine present on simulated aeroplanes, and in accordance with the goals set while the simulator was in development, engine models on different types are very detailed. One can perceive the difference between the variable pitch propellers and constant speed propellers coupled with Merlin engines on British fighters as well as the difference between the functioning of DB- 601 engines which are not equipped with the Komandogerrat device on German fighters Bf- 109 E1 and E3 and the Bf- 109 E4 fighter which comes equipped with this device. The automatic boost control is modelled on British fighters. This device can be switched off in order to get more power out of the engine, but with running the risk of damaging it. Team Fusion, in addition to other corrections of the engine model, added a few aeroplane model variants which differ from those that were present, first and foremost, in the usage of 100 octane fuel with regard to British fighters, and a war emergency power device modelled for the German Bf- 109 E4N fighter. Gyroscopic and torque moments, especially important while modelling the spin, depend on engine RPM and propeller spinning direction, and the simmer will feel their influence under certain conditions and find oneself compelled to compensate with aerodynamic controls. Influence of prop wash on an aeroplane that flies through it was present when the simulator was published, but it was switched off in order to save up on processor cycles.
Damage model is elaborate with regard to individual system failures and the influence damage has on flight characteristics as well as with regard to displaying the damage graphically. Holes in the wings or in the fuselage, as well as detaching of ailerons, elevators, complete vertical stabiliser or the wing represent just several among many effects simmers were well used to back when IL- 2 Sturmovik was setting the standards in damage modelling. IL- 2 Sturmovik: Cliffs of Dover adds a more elaborate engine damage model, thanking to it's more elaborate engine model first and foremost, while the odd simmer will be able to perceive pieces of skin or the engine cowling falling off an aeroplane exposed to gunfire, or the landing gear being lowered as a consequence of damage suffered by it's retraction mechanism. Someone may find a reason to wonder whether things have been modelled truly to the last detail: a Hurricane from which a segment of the wing containing the aileron detached, for instance, which is a bit less than a quarter of the wigspan, will remain flyable provided that the appropriate corrections are made by the rudder and the remaining aileron under certain conditions. The author of this article can not presume to know whether this was the case in real life though it is well known that an Israeli F- 15 landed with only one wing, but on the opther hand, for the sake of keeping things in perspective, one should bear in mind that the IL- 2 Sturmovik simulator, since the moment it was published, underwent many corrections for it's damage model to become what it is today. IL- 2 Sturmovik: 1946 also has structural failures induced by excessive G- load modelled which isn't yet the case with IL- 2 Cliffs of Dover.