BVE: Help: Smooth Curves Problem

[Simon_G]

RE: Help: Smooth Curves Problem

Hi James

Is this what you're after? The green line shows the curve you want to give an offset of 3.8m after 25 m. The formula is

   dx = L²/(2*r) where r is the radius of the curve

so r = L²/(2*dx)

Plugging in dx=3.8m and L=25 gives

   r = 625/(2*3.8) = 82.23m

Trying L=50m gives

   r = 2500/(2*3.8) = ~330m :-)

Hope this is of use
Simon

[jsdickinson]

RE: Help: Smooth Curves Problem

Hmmm... Didn't work. See below. I might just leave it non-smooth, Orpington is starting to get annoying .

====================
James Dickinson
www.brj.rr.nu - BVE from around the UK.

[Simon_G]

RE: Help: Smooth Curves Problem

>.... I might just leave it non-smooth, ...

Noooooo!!! Anything but that.

Ok. Have a look at the attached. Rail 2 is the one we're interested in (your labels may differ) and the distances are just for convenience. Lets assume that at 100m, Rail 2 is 8m to the right of Rail 0.

Your route should look something like this:

25m Rail 2: x = 8.00-3.80 =4.20; curve = -330
50m Rail 2: x = 8.00-0.95 =7.05; curve = -330
75m Rail 2: x = 8.00; curve = 0 (straight)
100m Rail 2: x = 8.00; cuvre = 0

Notice that the curve occupies two 25m blocks, but it ends at 75m and the block from 75m to 100m (adjacent to the points on Rail 3) is straight.

(Alternatively, end the curve at 100m and make a curved turnout object for Rail 3 )

> ...Orpington is starting to get annoying

Can't wait for those three-way points at the south end :7

[jsdickinson]

RE: Help: Smooth Curves Problem

Progress just need to mirror it . See below, tried changing the radius to a minus but it went across my tracks and tried changing radius of curve object and got zig-zags! Hmm... please say that I am not back to square one.

====================
James Dickinson
www.brj.rr.nu - BVE from around the UK.

[jsdickinson]

RE: Help: Smooth Curves Problem

Sorry to bring this up but I am really strugeling with this problem.

Simon if you see this can you please contact me through the PM system here, and we can have a chat.

Ciao for now, oh and I may not be around here for the next few weeks due to GCSE Mocks, I hate revising and then exams, ugh!

====================
James Dickinson
www.brj.rr.nu - BVE from around the UK.