Bill's Canberras

[burcham8]

Guys,

I think I remember a cure for Bill Holker's B-57's shaking above a certain speed, but I don't remember where I saw it. Is it on our site?

Marc

[Rich]

Was this with Force Feedback ???

[nazca_steve]

What kind of speed are you looking to get them past? I believe the max speed on the B-57 was something in the region of 582 mph. What are Bill's shaking at?

[Rich]

Steve, from experience most if not all shakes at certain speeds were down to the force feed back settings in the air file but only force feedback users suffered elevator, aileron and rudder flutter which could be felt in the joy stick, often quite strong.

I fixed a fair few via the air file, people without force feed back sticks would have no problems.

I used to set them at just over never exceed speeds.

[burcham8]

Starts around 400 knots. Disappears if you chop throttle and deploy speedbrakes or climb.

Marc

[nazca_steve]

Perhaps you could test it out with my B-57A FDE files and see if that sorts it. The A and B were extremely close in handling, in fact Roland Beamont reported the B felt no different from any other UK Canberra he'd flown, so I would give that a try. At the very least you could copy over the force feedback section from mine and see if that helps, as per Rich's suggestion:


[forcefeedback]
gear_bump_nose_magnitude = 1000
gear_bump_nose_direction = 18000
gear_bump_nose_duration = 250000
gear_bump_left_magnitude = 2000
gear_bump_left_direction = 35500
gear_bump_left_duration = 250000
gear_bump_right_magnitude = 2000
gear_bump_right_direction = 500
gear_bump_right_duration = 250000
ground_bumps_magnitude1 = 1250
ground_bumps_angle1 = 8900
ground_bumps_intercept1 = 5
ground_bumps_slope1 = 0.48
ground_bumps_magnitude2 = 450
ground_bumps_angle2 = 9100
ground_bumps_intercept2 = 0.075
ground_bumps_slope2 = 1
crash_magnitude1 = 2000
crash_direction1 = 1000
crash_magnitude2 = 2000
crash_direction2 = 9000
crash_period2 = 7500
crash_duration2 = 2500000
stick_shaker_magnitude = 2000
stick_shaker_direction = 0
stick_shaker_period = 111111

[Rich]

Trying again typed up a lengthy explanation clicked to send and got the dreaded SOH is down for maintenance, hopefully this will go this time.

Starts around 400 knots. Disappears if you chop throttle and deploy speedbrakes or climb.

Marc

Marc that would happen when speed is reduced below that magic 400 kts and is typical for a force feedback stick if the airfile section for force feedback is not right.

Are you using a force feedback stick ????

There are 2 ways of fixing it, one is to correct the force feedback section in the airfile or more drastically removing that section from the air file which removes force feedback altogether with no feel of dynamics and no stick centralizing.

Steve, the force feedback settings in the aircraft.cfg only covers bumps and ground feel not force feed back flight dynamics felt in the stick, you could remove that section and it would have no effect on flight feel and would give a very rough ride while taxiing as Fs 9 will use its default.

If you are not using a force feed back stick/yoke or whatever you will know nothing about any of this it is confined to force feed back