HK 4540 prototype winding

[Heli G]

One-of-a-kind collection indeed. If you ever run out of space there's plenty in my house Ralph.


Please keep us updated on the 4020, I think it will be a great lightweight powerhouse.

[powercroco]

Please keep us updated on the 4020, I think it will be a great lightweight powerhouse.

Gerard,

I think, you mean 4520 - not 4020 ?
tests in voodoo run very well, tests in banshee will follow soon.

[Heli G]

Originally Posted by powercroco

Gerard,

I think, you mean 4520 - not 4020 ?
tests in voodoo run very well, tests in banshee will follow soon.

Yep Ralph you're correct, I made a typo.

Can you tell us what winding you have used on the 4520?

[HeliFX]

Ralph,

Always wondered if engraving the motor can causes any balancing issues.
Have you found any noticeable vibrations ?

I suppose etching the metal would help with that problem. I'm guessing .

Personalizing the motors sure does add a nice touch.

Originally Posted by powercroco

3 pcs. HK 4540 engraved by werner.
as far as I know, they all will work into banshees.

[powercroco]

the mass of the removed material is over all about 0.1-0.2 g!
and the distribution is about symmetrical. (you need only one axis symmetry)

the only asymmetrical thing is the name.
this ia about 0.01g. may be, a fly -shit is heavier.......

never seen or heard about problems caused by such engraving.

btw:
also such very strong rebuilt speedcan runs smooth without vibrations.

[Vinger]

Originally Posted by powercroco

this ia about 0.01g. may be, a fly -shit is heavier.......

[HeliFX]

[powercroco]

the newest member into my privat 45xx collection in the "joint-venture-design"
it was milled by my friend werner.

[kevinbj]

Is this a lightweight motor for 700 class with the power of the 4525?

[powercroco]

my (privat) prototype is a shortened 4525 and has the same power as the serial 4525 but not as much as my 4525 prototype motors.

[kevinbj]

Originally Posted by powercroco

my (privat) prototype is a shortened 4525 and has the same power as the serial 4525 but not as much as my 4525 prototype motors.

Wow!! Looks awesome

[Heli G]

Originally Posted by powercroco

the newest member into my privat 45xx collection in the "joint-venture-design"
it was milled by my friend werner.

Awesome, have been waiting for this one Ralph.

Do you have some pics of the winding?

[powercroco]

Gerard,

also thisone looks like every other winding....

[Stolla]

Originally Posted by powercroco

my (privat) prototype is a shortened 4525 and has the same power as the serial 4525 but not as much as my 4525 prototype motors.

Ralph im curious how u got 25 power out of the 20. 1mm plates? My personal preference is lighter for better pwr to weight so im listening!

[powercroco]

for best power and weight ratio decrease the airgap and use thinner magnets, use an 8/6mm shaft in 16/8/5 bearings and turn away the heavy rips on the backiron.
and so on. and don't make the winding to fat - up to 200A peak 1,5 is absolutely enough.

so you can reduce the weight, almost without reducing the power in the normally used range.

[jamin_00]

Powercroco, do you do work for anyone? I have a motor I would like a price on the be rewound

[powercroco]

no.

pls. ask bert (_dekker) or mauro (GMauro)

[strokermtr]

Originally Posted by powercroco

no.

pls. ask bert (_dekker) or mauro (GMauro)

Not even a Pyro 800 ?

[powercroco]

for the first pyro 800 I will make an exeption as promised some time ago.

[strokermtr]

Pm me