it is looking like, it is who can make the....
---2 tracks
---wheels for tracks
---2 hyd cylinders
---1 hydrostatic transmission or electrical motor
---3 spots on bottom to connect 360 joint.
---360 joint have a motor on it to help spin the 360 joint and to lock the 360 joint in a single spot
---the final drive with ability to reverse one wheels (for when wheels turn 360)
---2 hyd lines (1 pressurized 1 not pressurized)
---1 wire bundle. if electrical motors, 2 wire bundles)
structural support... thinking about....
---tracks as low as possible (without touching wheels)
---hyd cylinders as high as possible or rather above everything.
---thinking is, the tracks and tracks for wheels... will help keep the bottom from "spreading out" the wheels for the tracks and axles/pins on them. hold the tracks together...
---placing hyd cylinders in the top say above each track. would help add support kinda like an EYE beam. were tracks are bottom portion of eye beam and hyd cylinders are top portion of eye beam. and everything else is the vertical portion of the eye beam.
--- i am going to assume main supports for the entire STB. would attach at the very top and run across the STB.
dimensions.... ((see rough diagram that is attached...))
---if wheels are 2 feet diameter, and needing say 6" space to keep mud from building up above them. then you have another 2.5 to 3.5 feet above the rims per say.
---limited to 3.5 in length. (distance from edge to inside edge *near center of STB along the short end*))
---limited to i would like to keep it under 4 wide. preferably 3 feet
other doings...
---hyd cylinders... i don't know, if it would be possibly to say make a thin walled sleeve. that fits into say a cast iron mold or if it would be better to just have standard hyd cylinders, that you see on current age tractors. (FEL, TNT for 3pt hitch, and like)
---if using a metal rod through drive shaft that goes down to the wheels through the 360 joint or a pipe around the drive shaft. i would imagine there would be some sort of "linkage" adjustment? if running wires down to the axles... then metal connections going through 360 joint, would need to be accessible and replaceable...
---360 joint. needs different locations were it can be placed on the bottom side. i do not know why. it just does... i would imagine some bolts go straight up and connect to things. there should be no pressure at this connection. and considered atmospheric pressure. though i would imagine some sort of seal. not a gasket like an engine. but perhaps some sort of 0 ring. that someone could take a roll of rubber from a roll and cut to fit. and place into a grove. purpose would be just keeping dirt, water, and other crud from getting into the joint.
---there should be some sort of "drain holes" to let hyd oil or transmission oil or like oil out of everything. for when a repair needs to be made.
---anything that requires some sort of servo or sensor or like. the sensor or server. needs to be easily replaced, without having to removing anything, more so anything that may require a special gasket, beyond a generic 0-ring.
---wear and tear should be considered, and if need be some sort of wear plates used.
---ability to lock the wheels up as in like emergency brakes. if wheels are not moving then a pin or latch might be used. if using hydrostatic transmission or like. valving might be used. to lock things as long as there is a backup, like extra check valve with extra seals. or another valve with seals on it... if wheels are moving, then hydrostatic transmission can be relied upon. if electrical motors... there should be some sort of "brake pads" placed on a shaft that will goto the wheels or brakes on the final drive shaft going to the rims... ((would really hate changing brake pads or like on multi wheels... not to mention dust collecting up in them, and causing problems))
---there needs to be a way to allow up to 2 feet min tracks that extend out, up to a max of 3.5 feet. the extension that fold out do not need to be considered in dimensions earlier up in this post.
hhmmsss.... *looks scared* talk about tall order...! oh and keep weight as low as possible... *laughs* thinking about a solid mass of metal and oil it would all be...