Dear:

1. Runway Excursion: The PC-12 veers out of the runway during take off roll. Also after landing, goes out of the runway. It is almost impossible to maintain the PC-12 on the runway! Any suggestion please?

2. Vertical Path Guidance during RNP approach: Can PC-12 maintain vertical path during RNP approach with AP?

Haseen Ahmad.

 

I have the same problem, some kind of force majeure takes the plane off the runway both during takeoff and landing and at different airfields and in all kinds of weather.

I have several dozen of planes in the simulator mostly shareware planes and these planes do not deviate from the runway, they behave normally, therefore something is wrong with this PC12.

 

 

Felix

Make sure rudder trim is neutral or 1 click left of neutral on approach....  Autopilot will move rudder trim a lot.

                                                         

Edited December 9, 20232 yr by jwhak

Regarding yaw control, as in real life the rudder and ailerons are connected in the PC12 so this causes problems when transitioning from ground to air given how MSFS deals with this. IRL pilots rotate and land at about 80 knots and if you do the same you should avoid the problem - faster than that and you get the nasty behaviour. I’ve managed to avoid the problem in my last couple of flights, and it’s good to know that I’ve done it by flying correctly. There’s more about the issue in this thread: 

 

 

12 hours ago, haseen said:

Dear:

1. Runway Excursion: The PC-12 veers out of the runway during take off roll. Also after landing, goes out of the runway. It is almost impossible to maintain the PC-12 on the runway! Any suggestion please?

2. Vertical Path Guidance during RNP approach: Can PC-12 maintain vertical path during RNP approach with AP?

Haseen Ahmad.

 

Hello,

For takeoff:

1) Hold brakes

2) Throttle up to 15psi -no need to do it slowly

3) When engine reaches 1700rpm, throttle up to 44.3psi. Again, don't do it slowly

4) Brakes off

5) Rotate at 70kts (flaps 30), 83kts flaps 40. Give it left pedal as the plane will crab when it lifts off

6)  Gear up, yaw damper on

Landing: check the manual for correct settings

We have a fix in progress for the skidding.

VP guidance: it depends on the GPS unit. We discovered different problems with the AP and each different GPS. Working with PMS and TDS to improve things.

20 minutes ago, A320_SX ALX said:

5) Rotate at 70kts (flaps 30), 83kts flaps 40. Give it left pedal as the plane will crab when it lifts off

This instruction is confusing. Standard flap setting for takeoff is 15. After takteoff you will certainly retract the flaps rather than extend them.

The main thing is to honk it off the runway at about 80-90 knots with flaps set at 15 percent. Faster than that and it starts cartwheeling.

The problem I have is the floating on landing. I think the flight model might needs some adjustments. But, what do I know? I've never flow a PC-12.

I've tried a few flights with the weight near 10,000 lbs. and even with the throttle closed and full flaps, it just doesn't want to quit flying.

3 hours ago, Flyfox said:

This instruction is confusing. Standard flap setting for takeoff is 15. After takteoff you will certainly retract the flaps rather than extend them.

You are right, flaps I should have written 15 instead of 40.

@RichieFly the plane does float on landing if your speed is high. Flaring at 80kts with full flaps can keep you airborne for a while. The trick is to burn that speed as you are crossing the fence and be idle and 10kts below your approach speed over the numbers. A short list for an 85kt approach, flaps 40:

1) Approach: 9psi, 85kts

2) Fence: start pulling back to idle while applying left rudder because the nose will come right from torque reduction. Desktop yoke slightly right to counter the interconnect and keep virtual yoke centered.

3) Numbers: idle and 75kts, start flaring. You don't flare much before in order to dart through ground effect.

4) Touchdown: 65kts. Let the nose down and gain control of the steering

5) Reverse. Get out of it at 40-50kts and apply brakes

6) Ground idle

 

Edited December 10, 20232 yr by A320_SX ALX