this piston, tie rod etc - graphics only to fill the space. the animation i made in around 40 min, and i had take the points i had to make it easy.DerivePi wrote:I'm no expert (as will be made clear ), but I've wanted to model the steam piston wheel assembly from old locomotives for some time. Some things that I think will help your model:
- The eccentric rod should only have one pivot other than it's attachment to the wheel and should be attached to the wheel at 90 degrees from the piston attachment - correction: my sketch oversimplified this - http://trumpetb.net/loco/rodsr.html - its still attached at 90 degrees (and phased at 90 degrees, not 180) but the eccentric rod needs to account for the vertical translation to the valve box - nevermind, carry on
- the tie rod should be connected directly to the piston wheel attachment (no reason to transfer all that stress through the first wheel)
- the piston assembly should have a guide. Otherwise, the cylinder would need to keep the piston rod from shifting vertically at it's first pivot which would cause a huge maintenance issue.
I don't have anything for the reversing rod or shifting mechanism, but those are detail items that would be hard to see at this scale anyhow.
if i had planed to animate from begin i had set/modell some things complete different.
after i had rendered this animation i delete this by mistake - so i need to make a new one, if needed. and this time i promise i make it correct and fixing all the floating points.
if have somewhere on my harddrive a better/correct animation of cylinders. if i found i post a sample