MechJeb2

MechJeb2

4M Downloads

Landing point of Aircraft approach and autoland is too close to the center of a runway

morphelianus opened this issue ยท 0 comments

commented

MechJeb Version (DEV RELEASE)

2.10.0.0-1001

KSP Version

Stock 1.10.0.2917 de-de
Making History 1.10.0
Breaking Ground 1.5.0

Description

It seems that the landing point has moved toward the center of the runway. Which is fine for the runway of KSC and small airplanes at low landing speed. But for the island runway or airplanes coming in with 80m/s or even greater have issues as they could overshot the runway. https://youtu.be/E4EQSC6VtHc

I am aware of this behavior. There's something in the code called "waiting for flare" that makes the aircraft steer towards the end of the runway. It basically sets the v/s target to 0.8m/s or something like that. At some point, the aircraft is low enough and eventually flares and lands. I already reduced that "waiting for flare" altitude from 10m to 5m to reduce that effect but I admit that it still looks odd. Also, the flare maneuver could be better. Right now, I don't have a good solution for that.

This behavior changed with the recent changes, e.g. the landing point for Island runway 09 was right at the beginning of the runway at 70 meters. It even sometimes seemed that the airplane will crash into the hill but it was just fine. Could it be somehow related to the changes you did to adjust the approch pattern and glide slope of Desert runway 18?

Originally posted by @morphelianus in #1322 (comment)