Thrust reverse on the Cessna CJ1

[maestrogn]

Does anyone have experience setting up the thrust attenuators (not reverse) on the Cessna CJ1? I've found this operational note: "Note the Cessna Citationjet, which has no reversers but clearly visible "thrust attenuators" which deflect about 45 degrees into the exhaust, producing no reverse but negating the idle thrust by defecting it sideways."

So the question is, is there a way to simulate this using FSUIPC4?

Also, I saw that the aircraft.cfg file has the following:

[TurbineEngineData]

fuel_flow_gain=0.0040 // was 0.0020

inlet_area=2.1 //1.7

rated_N2_rpm=29920

static_thrust=2283 // was 2383 nominal value is ignored per engine. This param is superceded elsewhere

afterburner_available=0

reverser_available=0

bypass ratio = 3.3

[jet_engine]

thrust_scalar=1.0

//0 Class

//1 Longitudinal Position (feet)

//2 Lateral Position (feet)

//3 Vertical Position (feet)

//4 Impact Damage Threshold (Feet Per Minute)

//5 Brake Map (0=None, 1=Left, 2=Right)

//6 Wheel Radius (feet)

//7 Steer Angle (degrees)

//8 Static Compression (feet) (0 if rigid)

//9 Max/Static Compression Ratio

//10 Damping Ratio (0=Undamped, 1=Critically Damped)

//11 Extension Time (seconds)

//12 Retraction Time (seconds)

//13 Sound Type

[contact_points]

point.0=1, 16.00, 0.00, -2.88, 1181.1, 0, 0.7549, 43.0, 0.2350, 2.2, 0.4500, 10.0, 10.0, 0, 0.0, 0.0

point.1=1, -3.20, -6.02, -2.92, 1574.8, 1, 0.8549, 0.0, 0.2700, 2.2, 0.4800, 9.0, 9.0, 2, 0.0, 0.0

point.2=1, -3.20, 6.02, -2.92, 1574.8, 2, 0.8549, 0.0, 0.2700, 2.2, 0.4800, 9.0, 9.0, 3, 0.0, 0.0

point.3=2, -8.55, -22.00, -0.60, 787.4, 0, 0.0000, 0.0, 0.0000, 0.0, 0.0000, 0.0, 0.0, 5, 0.0, 0.0

point.4=2, -8.55, 22.00, -0.60, 787.4, 0, 0.0000, 0.0, 0.0000, 0.0, 0.0000, 0.0, 0.0, 6, 0.0, 0.0

point.5=2, -22.00, 0.00, 0.00, 787.4, 0, 0.0000, 0.0, 0.0000, 0.0, 0.0000, 0.0, 0.0, 9, 0.0, 0.0

point.6=2, 0.00, 0.00, - 1.50, 787.4, 0, 0.0000, 0.0, 0.0000, 0.0, 0.0000, 0.0, 0.0, 4, 0.0, 0.0

static_pitch=0.55

static_cg_height=3.22

gear_system_type=0

Is there anything to be gained with a change in "reverser_available=0"?

Finally, because, in FSX, this airplane will roll forward with idle thrust set, this might be contributing to the unrealistic stopping distances using brakes alone. This leads to the question, how do we increase the braking efficiency?).

Merry Christmas to all

[herve_sors]

I don't think you will be able to do that with FSUIPC, as far as it implies some changes you have to make to the aircraft configuration. The best I see to "simulate" thrust attenuation is:

- to enable reverser: [TurbineEngineData] -> reverser_available=1

- to determine using a monitoring program the fraction of max reverse throttle position that will cancel iddle thrust (should be around 0.10-0.12): [GeneralEngineData] -> min_throttle_limit = -0.12

- so as to avoid reverser "sound" you could also have to make some changes to the sound.cfg file

Braking efficiency can be increased at [brakes]-> toe_brakes_scale=x (>1)

Regards

Edited December 25, 2011 by herve_sors