Loco Tilt Issue causing loco to fly

[MallardFan]

Hi

I am trying to figure out how to get my loco to join up with the bogies and not start flying due to "Consist Tilt"

I have tried numerous values for the collision boxes pivots etc, all giving the same response. I have even tried the Values from the Class 76, but still same. I have just tried starting with them separated, and they won;t get close enough - they stop with the loco only about half over the bogie.

Trouble is I can't start testing out the Electrodiesel methods now until its sorted, so I am stuck :/

Any ideas?

[MallardFan]

OK Small update,

done some more fiddling with the numbers, and now I get a slightly smaller jump and the bogies come together more. One thing is the error has changed now to "Player train derailed"

Any ideas how to fix it?

Edit: Could it be that the mesh height is a issue - the Class 76 has a flat bottom, whereas I have the bufferbeam and engines underneath?

[MallardFan]

OK some different testing:

I tried the Class 76 Bogie with the Class 73 body, and the Class 76 Body with the class 73 Bogie

The 73 Body with 76 Bogie did the usual skyjump

the 76 Body with 76 Bogie didn't

Does this imply the issue is with the body and not the bogie?

Many thanks

[DaveDewhurst]

What are the collision box values in your loco body blueprint?

Dave

[MallardFan]

Current values are:

Front Pivot X: 2.246
Front Pivot Y: 0
Back Pivot X: -2.246
Back Pivot Y: 0
Collision Centre X: 0
Collision Centre Y: 2
Collision Width: 2.54
Collision Height: 3.8
Collision Length: 1

[DaveDewhurst]

My maths could be off this early in the morning but
your collision centre Y (height from ground) is 2
you collision box height is 3.8
That means your collision box base is 10cm off the ground?
Is it being intersected by the bogie engine collision box?

Dave

[MallardFan]

What wold be the best way to find out?

My bogie numbers are:

Front Pivot X: 2.3
Front Pivot Y: 0
Back Pivot X: -2.3
Back Pivot Y: 0
Collision Centre X: 0
Collision Centre Y: 0.629
Collision Width: 2.54
Collision Height: 1.058
Collision Length: 4.04
(and front is towards the body)

[DaveDewhurst]

Using your co-ordinates you should be able to make two boxes in blender/sketchup/insert 3d package here
which will visually show you if there is any overlap

Dave

[MallardFan]

OK can't see any overlap:



The box are the collision box, and the flat planes the Pivot X location

Left is the bogie, right the body

[DaveDewhurst]

One last thing and then Im out of ideas,
Does the fake bogie position of the main body fall inside the collision box for the front (separate) bogie?

Dave

[MallardFan]

Yeah its essentially the same bogie, with the references to boxx and whxx removed

[DaveDewhurst]

Try, as a test moving it so the fake one doesn't exist in the same space as the other (real one)

Dave

[MallardFan]

I tried that, and reduced the wheel radius to 0.005 (as in Woodhead) and it works!

Thanks!

[MallardFan]

OK the dreaded tilt fly issue is back except now its on a single locomotive.

It is related to my invisible bogie - remove the bogie, and it goes

I've shrunk the wheels, moved it back, forwards, and same general result.

Currently. I am getting "Player Train derailed" with these values, so slightly better then when I started:

Front Pivot X: 2.41
Back Pivot X: -2.75
Collision Centre X: -0.17
Collision Length: 4.6

Bogie Pivot X (Full Bogie): 0.2
Bogie Pivot X (invisible Bogie): -2.6

Invisible Bogie Horizontal Offset of each axel: +/- 0.005
Wheel radius: 0.0005

I tried

Bogie Pivot X (Full Bogie): 0.3
Bogie Pivot X (invisible Bogie): -2.6

And this gave the consist tilt, not sure whats better, derail or tilt?

[spontin]

Not sure if you are describing same problem we had with NG stock tilting around sharp curves but the trick was to put the Y axis as 0 (zero) so that the was at ground level.

See http://forums.uktrainsim.com/viewtopic. ... 7&t=130980