I'm also noticing that the thrust vector is also a large contributor of the issue. It's raised up above the CG. Meaning it's not inline of the CG. It being off set above the CG and it also being angled is causing a lot of downward force causing a pitching of the nose with any slight amount of thrust.

Trying to make adjustments to see if I can get it to work. Not having a lot of luck.

PP

Could be a personal problem. Still having a lot of fun though! Learning a lot from working with your model Krautrengen.

bot

njgf

@BeatU4Klondike
Thank you for the nice words and detailed feedback! I've ben taking your points in regard and tried improving on a few of those, mainly the pitching down and takeoff difficulties.
Although the CG of the plane was placed near middle and causes pitching and yaw instabilities if moved further back I found some problems with the center of lift and center of thrust as you further mentioned.
I adjusted the centerline of thrust to improve on the linear pitching moment. I also redid the landing gear and added front steering on the ground. Lastly, I adjusted internal flaps to adjust to the CG shift of the landing gear retraction and react to the airspeed slightly. The system is not perfect but it should help keep the plane straight with less player imput.

It'd be great if you could take a peek at this updated version and comment what you think should be improved further:
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2131647514
(cause of a steam bug I had to reupload the bot instead of directly updating this one)

I'd be happy to have a look.

It's flying much better now with your new updates. I just need to add a tiny bit of corrective pitch trim in order to retain straight flight. I can now thread the stone arches and most of the bridges around the Norrland sandbox map.
I am finding though that the jet constantly wants to slip in the yaw axis once the landing gear fold in. I speculated that it is due to rear wheels touching and pressing together when folded in, causing an unintended sideways (yaw direction) force in the back.
Out of curiosity, I found when printing the Horten high in the air without it's rear wheels, it no longer constantly slips on it's path on the yaw axis once the gear are folded in. I also later noticed that the rear wheels are bolted directly to the gear frame without rotation ability. And that you have a little hidden length of frame that touched the ground just barely below the rear tires. (A little bur of frame being used as a hidden ski.)
I tried removing the ski bur, as well as using small motors between the gear frame and the wheel to allow weight support and rotation from the rear wheels. I could then roll slowly on the ground with enough control to taxi from the hanger to runway without the the jet rolling over and hitting the wings on the ground. Before it was not possible to taxi, even with roll tipping and wing tip ground contact. Once I was in the air, I found the weight was all off again causing a heavy need to trim for pitch. This wasn't to hard to correct.
With my adjustments I also found that when folding in the gear, the wheel would hit into the top of the air frame from inside and damage the jet. As well as causing forces from the hinge and wheel pressing up in the back of the air frame. (unintended constant pitching force) I found that I was able to fix this with using barrings instead of small motors. Barrings do not poke out as much and allow rotation. They were lighter as well. I also tried to use smaller wheels. All in all, it worked out really well. But it does look a bit silly without the original bigger more balloon like tires.

Glad you like the changes I made.
The rear landing gear was indeed the main reason for unintended yaw motions, hence I redid the rear landing gear on the new version, as I said. the old one was built back in december, back then I couldn't quite figure out how to make the reat gear retract completly with the wheels as another sub-assembly, hence I "faked" them in that way. The wheels on the new updated version should be free spinning and more stable on the ground now.