Alan sent these screen images along with a cool shadow border, so our post gets a slightly different look.
Shown above in green is the proposed morphing seat. Actually, there is the boxy (just for layout...not the real design) seat sub-frame. The end of the morph arm, along with the little tab that moves (how?) adjusts the seat angle to be correct in both low rider and high rider positions.
Side view in high rider. The 74 inch rider isn't there.
Mid morph. The seat morphing mechanism is beginning to tilt the seat backwards.
Now the seat is tilting back more to correct for the morphing down, and to move the rider to the correct low-rider tilted-back position.
All the way down, in low-rider mode.
Issues to think about:
1. How do we support the seat back? Needs to be very rigid as you power the pedals. Looks like it would be hard to put a strut between the morphng frame and the seat back, because dimensions are changing
2. Need a foot rest that lets the rider rest their feet in both low-rider and high rider positions.
Here is the e-Drawings file for the SolidWorks model: You'll need the free e-Drawings Viewer (for Mac or PC)
The best way to visualize the design is to use this 3D viewer and change the configuration pull down to move the bike through its morphing range.