My pie is fatter than your pie!

[Morgen 3Eman]

I 'm finally at a point where I have to have the rear wheel on my Morgen 3Eman, so I mounted the tire on my widened 20" MP3.  This is just for unpowered testing of steering and suspension right now, but I'm getting close to bringing power to the Pie.  The unmounted tire is a normal 20" tire, just for comparison.  I think it looks pretty good.



TTFN,
Dennis

[Bikemad]

It's looking very good Dennis, but why is the wheel fitted the wrong way around?

The wiring and brake disc mounting should be on the left hand side.

Alan
 

[Morgen 3Eman]

Well, it's because I'm a damn fool!

I actually made no thought at all about the orientation, only about the dimensions for the mechanical fitment.  I guess I should look at installation and wiring information after I test the steering and suspension.  I haven't even thought about the details of wiring the Pie, only the major system requirements, like getting 12V for the lights, and high current circuit breakers and power switches.   I wonder what else I've got to learn about this thing!

Thanks for the heads up about the mistake, Alan.  Keep up the good work.

Sincerely,
Dennis

[Leslie]

http://stores.ebay.com/Renton-Company-LLC/Single-Output-/_i.html?_fsub=2020207015&_sid=77121515&_trksid=p4634.c0.m322

Monkey put me onto these DC to DC controllers.  We figured out how to adjust them withing .5v range on my 3.3v model.  Mine has lasted amazingly.  You could even stack these up parallel inputs and series the outputs, and use them for BMS as the inputs are well isolated from the outputs..  An awesome little device and pretty idiot proof too..

[Leslie]

I wonder what else I've got to learn about this thing!

Sincerely,
Dennis

Looking Sweeeeeeeeeeeeeeeeeeeeeeeet  Ooops wrong way.  Like an American driving in europe.  Happens all the time. 

Youre inspiring my welding learning just the same.  Ive been slack on doing any work of late.

Now.  You want some paranoia put on your really awesome looking trike?  I can find plenty.  I can even make it up.  LOL just incase something may go wrong.

Serously though read on.

How is the ventilation around the hub, these hubs cool very well due to airflow, take this away, and I am not so sure. 

I have melted a HBS hub going up a steep hill carying weight ina trailer.. 

Slow on high load, lots of power and little air flow.

[Morgen 3Eman]

Hi Les,
Thanks for the heads up on the heating problem.  When I get it running I'll do some thermal analysis.  It looks like it would be easy to incorporate a fan into the covers.  On the other hand, if heating is a problem with load, and loading slows the wheel and the fan,  maybe I'll look into a dc fan and thermal switch....Hmmm, prototyping is such fun. 

TTFN,
Dennis

[Leslie]

If there is any thermal problem, it is never a problem always an opportunity.



^^^I was thinking huba buba nice.^^^

Some back pressure side vents will create some decent air flow withou causing too much resistance.

[Morgen 3Eman]

Hi Les

Nice car!  The nose reminds me of a 1950's Ferrari, but the backend and roof line just don't bring anything to mind.  What is it?  Is it yours?  If it is, congratulations on owning a real beauty.  That shape is what made me fall in love with painting cars a long time ago.

Heat can be a good thing, but most of the time control of it has been more of a problem to me.  I used to be in the semiconductor business, and temperature non-uniformity caused us interesting yield variations.  Solving those did present us with more opportunities , tho. 

TTFN,
Dennis

[Leslie]

No way, I wont drive a polution beast, stinky.  Never

Im full ebike and solar powered 100% at that.  To be honest I suspected your thermals should be fine unless your pulling looooots of weight up hills.  I was just looking for an excuse to see you put some cool grills on the side of your beast.

I was looking for this car.

[Leslie]

Can I ask you some questions.

Is that wheel only on two droput arms?

How would this compare to a rigid structure like a triangle steel bike dropout?

How much would your motor weigh with thick MP wheel and thick tyre, compared to a standard MTB wheel with no motor?

Is that a standard MTB shock?

[Morgen 3Eman]

Hi Les,

The shock is unknown brand, I bought a junked bike and stripped it off of that.   My vendor has my intended spring/shock on back order.  So when I get the right one, I have to rebuild the swing arm and shock mount bit to fit that shock.  This is a prototype, so there have been a lot opportunities for change.  Pretty ugly at this point, isn't it?  Most of the welds are actually tack welds just for that reason.

I don't know what a drop out is, but yes, the swing arm is not a triangle.  It is two pieces of .08? oval steel tube with 3/16" plate for actual mounting the wheel.  Is that the drop out?  Yeah, I know about triangles being strong, but one of my professors taught me that if your only tool is a hammer, you tend to see every problem as a nail.  Most of the load bearing structure of the chassis is made from triangular steel tube-like structures.  (Made from .029 sheet steel.)

I have no idea what the wide pie wheel and tire weighs, but it is surely more than a normal bike wheel.....And I have no idea what a "MTB" is.  I'm not a bike guy, I'm a hot rodder building toys for my grandkids.

I hope to kluge power and control to the hub in the next few days, just to see the damn thing spin.

TTFN,
Dennis

[Leslie]

So have you actually owned a working Ebike? Or is this your first?

[Morgen 3Eman]

This will be my first electric vehicle.   

TTFN,
Dennis