If I understand the renderings correctly, it's a tadpole trike where the
crank-seat-rearwheel assembly tilts, and the pivot is set up so that tilting
causes the front axle (sort of a cart axle that runs all the way across with
the wheels fixed to either end) to turn in the direction of the lean. Or,
conversely, the trike has to lean into the corner as you turn.
I knew someone with a similar trike - a tadpole with the front cross set up to
pivot at an angle so it would lean as it turned. It was, effectively, a
tilt-steer trike. I don't have photos, but you can see a couple pictures of
something very similar here:
http://tiltingvehicles.blogspot.com/2010/07/zepher-tilt-steer-tadpole.html
It was simple, elegant, and great fun to ride, but had two major problems:
1) the ratio of tilt to steer was fixed by the pivot angle, so it only worked
well within a certain range of speeds
2) on crowned roads (or any other uneven surface) the rider had to keep the
seat perpendicular to the surface to go straight, which meant leaning at an odd
angle
He concluded that, if at all possible, you should keep the tilting and steering
mechanisms independent.
-Darin
---- On Mon, 04 Dec 2017 12:19:13 -0800 Kenneth Stewart
<kenny.stewart@xxxxxxxxxx> wrote ----
Hi Jurgen,
I am aware of tilting trikes with lean steer, but my design does not
work like that.
The front axle is rigid, there is no Ackerman steering, the wheels do
not pivot. The axle pivots at 65 degrees to horizontal at the front of
the body.
The body, chassis, transmission, seat, and rear wheel are one unit
As the front axle is turned the body leans by means of the geometry
into the bend. There are no extra levers to control the lean.
Regards
Ken
On 4 Dec 2017, at 19:45, Jürgen Mages wrote:
Thanks Ken, this makes the steering principle more clearer to me. The
design reminds me of Greg Kolodziejzyk's lean steer trike (see similar
concept in the attached gif).
The steering pivot seems to be behind the rider and the rider plus the
whole front part is one single unit that tilts - correct?
If so I would consider it to be rearwheel steered (RWS) and not python-
ish ;-)
Regards,
Jürgen.
On 04.12.2017 19:40, Kenneth Stewart wrote:
> Hi Jurgen,
>
> I have just published the section concerning Python geometry on my
> website. Please have a look and see if it makes sense.
>
> Regards
>
> Ken Stewart
>
> http://kenstewartartist.com/ ;
>
>
>
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