Increase the range of motion...

Hi Gents,

Apologies for my first post in some time, actually being a question

I've been crazy busy at work and unable to do much on the sim. I'm hoping to change that this weekend.

I'm happy with the motion of my sim, but I want to get a bit more pitch from it, so I am going to change the 45mm arms to 55/60mm arms and raise the motors a touch to accommodate the new lever arm lengths. (so at full down they clear the sim base)

My question is, do I then need to raise the pivot level or just cut the motor arms to suit? I just can't figure it out in my head, as each time I think of raising the motors by 10cm (as an example) and then cutting off 10cm from the motor arms (to level out the sim) the net result is 0 gain. (in my mind!)

Likely a stupid question, but rather than start at things with an angle grinder I figured I'd ask our resident genius members

Thanks @noorbeast - You know for the life of me I could not get that right in my head!

Once you see it you go "DOH!" *facepalm*

I know what you mean @Archie - once you start doubting yourself, it can be very hard to figure things out. Until you get some visual representation of what you thought of in the first place....but as always, @noorbeast is on the case right away!

Happy grinding!

Just remember, I recall you are using 25:1 boxes and you will reduce the torque you currently have for larger wanted movement. It should work, but the motors may struggle a bit to pull up from a big side shift lean. If that happens, buy some 50:1 boxes and fit them to the motors.
As you are using JRKS, you can make the motion a bit snappier to help.

Thanks @bsft - I've tuned the JRK to within an inch of their lives, it's more the throw I am looking for.

I will likely re-tune them to keep the sway/roll throw similar to what I have now (axis limit it), but will up the pitch a bit. I am using the full 180 degrees at the moment and really don't have all that much pitch to show for it. It's the one sensation I love in the sim. I am happy with the amount of Roll/Sway I currently get.

I notice in DIRT Rally, the pitch is not great (for me) and that is what I want to update it for. Freakin love that game!!

@GIB SimRacing - Yeah! Fully agree mate . I was looking at the sim, doing some measurements and I just could not figure it out. I think I was forgetting that the arm will be longer and of course the arc/throw would also be longer. (Penny drop thanks to the awesome diagram from @noorbeast ) I just could not get past having to lower the arms once the motors were raised, and confused me old 'noggin.

Try working the pitch only in Dirt Rally and see what you can come up with.