Propeller Torque
Posted: Mon Jan 06, 2020 1:12 pm
In the latest version, there is a CG offset that essentially adds 3000+ lbs-ft of roll torque. I believe this was a work around, due to the lack of torque effect in the sim. After some testing, I've discovered the reason for the lack of propeller torque.
First, in the [weight and balance] section, restore the CG
//empty_weight_CG_position = 2.6, -0.321, -0.5
empty_weight_CG_position = 2.6, 0, -0.5
Then, in the [reference speeds] section, set the stall speed to a large value
flaps_up_stall_speed =999999 //98.24250
Note, this will also cause the stall warning to disappear, but it's a worthwhile tradeoff
The reason for this is because torque goes to 0 at 1.5 times this speed. Makes no sense, I know....
Finally, the sim only applies engine torque and not propeller torque, so for airplanes where the reduction ratio is greater than 1, you are not getting the full effect. So, the scalar needs to be increased to match the reduction ratio in the [flight tuning] section,
torque_on_roll =2 //1.00000
You will probably need to do this for every piston airplane in your collection, certainly all the WW2 types.
First, in the [weight and balance] section, restore the CG
//empty_weight_CG_position = 2.6, -0.321, -0.5
empty_weight_CG_position = 2.6, 0, -0.5
Then, in the [reference speeds] section, set the stall speed to a large value
flaps_up_stall_speed =999999 //98.24250
Note, this will also cause the stall warning to disappear, but it's a worthwhile tradeoff
The reason for this is because torque goes to 0 at 1.5 times this speed. Makes no sense, I know....
Finally, the sim only applies engine torque and not propeller torque, so for airplanes where the reduction ratio is greater than 1, you are not getting the full effect. So, the scalar needs to be increased to match the reduction ratio in the [flight tuning] section,
torque_on_roll =2 //1.00000
You will probably need to do this for every piston airplane in your collection, certainly all the WW2 types.