Hey guys, my passion is to "fly" BF2 helicopters in the Oculus Rift and therefore to prepare them as to behave more realistic in terms of flight dynamics. Since I´m using SAITEK pedals, vertically installed thrust lever (for collective pitch) and joystick (=cyclic), the Oculus Rift gives me complete immersion in the cockpit.It´s a phantastic experience - and it all started with bf2freelook and TrackIR. Now, with the Rift, it´s a totally new dimension-you feel like sitting in the cockpit and the HUD is moving with your head like a helmet mounted display. Using also a razer hydra for lateral tracking I´ve got full 6DOF head tracking - simply gorgeous! Turreted gun and guided missiles can be slaved to this "helmet mounted display", too! ATM, I´m preparing BF2 helicopter models which have a nice detailed cockpit for the flight in my Rift. To give them more realistic flight dynamics, I added torque effect, translating tendency and weather vane effect (except the KAMOVs)+new weapons.

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bluehawk112 Creator

AH64A pilot´s seat:

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bluehawk112 Creator

Hey there, I think I succeeded in adding some more "realistic" flight dynamics to most BF2 helicopters. There are some funny effects in real life helicopter flying: to describe it easy:

When you throttle up (which would be pulling the collective pitch lever), the helo should make a yaw movement (yaw momentum) to the right - at least during the phase of throttling up. Same vice versa: having no torque anymore (collective full down), the main rotor turbine bearing friction causes the helicopter to yaw into the same direction the rotor goes (counterclockwise= yaw momentum to the left). This happens if the rotor blades are rotating counterclockwise (looking on top of the helicopter)- which is the case at nearly all US helicopters. Of course it´s possible to counteract with the pedals (rudder/yaw). The counteracting pedal -when pulling the collective lever- is the left pedal. It´s called the "power pedal". This "torque induced yaw" is also present at hovering and at slow airspeeds - but weaker than during the pulling phase of the collective lever. It´s because the tail rotor is "trimmed" for cruising speed, not for slow speed/hover. You don´t want to give pedal input the whole time during cruise flight...


(scroll down and read:Helicopter Dynamics & Helicopter Control Inputs)


Summing up, there are clockwise yaw effects due to torque of the main rotor, especially during takeoff and hover but also in opposite direction when decelerating with collective lever full down (bearing friction). Also lowering the collective lever a little bit during hover without reducing the use of power pedal accordingly can give a momentum in the same direction the power pedal shows (too much power pedal input now).

Next effect that´s simulated in the helicopters I edited is the translating tendency during hovering: Since the pilot makes use of his "power pedal" to counteract yaw, the whole fuselage is now getting a sideward drift, caused by the tail rotor (due to the use of the "power pedal"). This can be counteracted by tilting the whole fuselage to the left (roll to left with cyclic stick).
To see what I tried to achieve, visit :

The required steering inputs to counteract translating tendancy and torque during takeoff
can be seen in this video at 2min:25sec: Youtube.com

Next what´s simulated:
With higher airspeed the sourrounding airflow presses the tail into the line of the flightpath (streamlining). So: with rising airspeed the fuselage aligns with the flightpath and the use of tailrotor becomes more and more ineffective.

What I also needed to consider: French and Russian built helicopters have clockwise turning rotors. Hence the torque forces need to be applied in opposite direction. Furthermore: the Kamov helicopters (with 2 mainrotors) don´t have these torque effects at all.

IV. Since I´m using a throttle (vertically fixed to a chair), I removed the "autohover" function in the bf2 helicopters (it can easily be switched on again)
Helicopters ready for Oculus Rift are now:

Littlebird MH6, UH-1D Bushranger, UH-1N with rockets, Kiowa, Viper, Apache AH64A and AH64D, UH-1Y Venom, EC 635, SR-70 Battlehawk, Dauphin/Z-9, Fennec/WZ-11, Havoc Mi-28, Mi-8 (armed), Mi-24, Ka-50, Ka-52

Soon I will be finished with Lynx, Ka-60, Bell 212 (armed Griffon) and the Dauphin/ Panther. Later on I will work on the WZ-10 and the WZ-19. That should be enough then ;-)

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