CAD Design (April 2020)
CAD Assembly
Master Sketch
Changes from Spring/Fall 2019
Removed clevis to make manufacturing easier.
Created connections(mounts) to chassis.
Found new rack in bay (unknown PN) approx. 130mm of travel.
Design geometry has been subjected to FEA.
Detailed design of all components.
Converted design into master driven.
Most fasteners are various lengths of M6/M8.
Steering Geometry
It was found the most optimal way to achieve perfect Ackerman is to align the steering arm at the same angle as the line that connects the intersection of the track and wheelbase to the middle of the back wheelbase line.
Model of Ackerman can be found: GrabCAD\MSXIV\Development\Dynamics\Steering
In the file “Ackerman 2D model” or “Overlay”.
Overlay contains the master sketch with the Ackerman model.
Overlay model with wheels turned at 26 degrees.
Steering Column
Collapse occurs in the upper column, with min ~3in of travel.
Includes u-joint to allow the unit to tilt, unknown if this will be pursued.
Tie Rod
Design similar to push rod.
VR3 tube used in the middle with threaded components welded on the sides.
Welded components are machined and give greater freedom in thread sizes (vs VR3 tube ID).
