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Recumbent tadpole trike: Posts on velomobilforum p.7

Recumbent tadpole trike: Posts on velomobilforum p.7

Hello!
I have been doing some fast prototyping in plywood. I glued up a strip of 3/4" plywood and  1/4" plywood (they are actually metric ply close to those measurements) to get a small sheet of 1" thick plywood. So I then cut this to made some 1" square plywood dowels about 8 foot long.  From these dowels , some wood screws, and a couple of bolts I put together a proof of concept tilting trike frame. I want to play with it a bit and will buy more hardware to hopefully put on some wheels.  Nothing I built is usable for riding. This is literally just a full scale model and a poor one at that. Mostly I want to see the full size geometry and how the machine functions. So here are my pictures from shortly after the sun was up so forgive the shadows.


Now tilting
Right
Now Tilting 
Left






































Now a couple of close ups of the middle.



I will post more as I build some more of the model. I am using a "standard" n55 geometry though I doubt that will be what I build to ride but so far it is looking good. I wonder about bearings and how to stop wear on the inside surface of the moving members. I was thinking a solid core with a bearing cup bored into it for support of the bearing might work as a way of eliminating the wear. Several schemes come to mind for making this type of thing work.  I think that the bearings might be to big on the outside diameter for 1" square tube so this might not work.  If anyone has an idea please post.

Till later,
Ceeann

 

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