Water cooled or air cooled motor?

[Podbuilder]

Pic with frame and wheels.

 
With the 72v 10kw motor and 72 headway 10Ah batteries.  I think I'll do a 24s3p arrangment as they seem to fit.

 

I'll gear the bike so it has a lower top speed and more "grunt" from a stationary position.

Brad.

[Podbuilder]

Does anyone here use headway cells to power their vehicles?

Brad.

[Morgen 3Eman]

Hi Pod,


Hey, there is a green tie rod? drawn under the spring/shock.   What is the purpose?  To take the shock loads out of the chassis/batterybox?  Is the silver cylinder the motor? 

By the way, please wear a helmet and leathers when you test this thing.  It looks dangerous as hell!  Keep the drawings coming, please.

TTFN,
Dennis

[e-lmer]

Dennis,
The tie you are talking about looks like a tenson bar.
It would force there to be a relationship between the angles
of the two spring arms at rest.

I would have to do some sketches to get the exact mechanics,
but it looks like the rod stays in tension and supports the
entire weight of the vehicle.  Since the torque arms are shorter
at the rod, it takes less tension to balance the compression of
the spring.

The setup would force the rear arm forward when the shock
gets compressed, reducing the amount of lowering as the front wheel
rotates up.

It seems that is the weakest point in the design, the entire suspension
depends on those two pivots at the end of the rod.  I would double it up.

[Morgen 3Eman]

Hi El-mer

I came to the same conclusion, but my question really should have been why?   Whenever I see levers with differing ratios coupled with levers that have geometric differences, I get snoopy.  I have made a tilting trike that has the inner swing arm pivot swing thru a smaller angle than the outer swing arm, so it is self righting, but it is a bit bulky.   Pods layout multiplies the forces on the shock,  while reducing the movement, doesn't it?  At any rate, please educate me, Pod.

TTFN,
Dennis

[Podbuilder]

Honestly, I've not idea fellas.  I'm simply drawing up a bike based on pictures I've found on the net.  Yes, it's a swing arm and yes it will multiple the forces of the shock.  I can only presume they had room for one shock on the bike and doubling the compression ratio solved their problem.  Whether or not it's going to work is anyone's guess.


I take it you guys don't use Headway cells?

Brad.

[Morgen 3Eman]

Hi Folks,

Well, I sat down with pencil, paper, and my 3D CAD program (Cardboard Aided Design), and figured out that the combinations of levers and spring/shock /tierod function as a mechanical equivalent of a rising rate spring.  As the wheel is forced up farther, the displacement of the shock length  is increased for a given wheel deflection distance.  The amount of increase is modulated by the lengths and angular positioning of the levers on the front suspension and the ratios of the pivot  points on the chassis mounted lever.  The distance from one set of levers to the other has a smaller but very noticeable effect. 

TTFN,
Dennis   

[Podbuilder]

Yep.  That's the conclusion I can too also.   


Well time to move on.....  this forum is just too quiet.   Thanks for the replies.    out!!


Brad.