Good! Someone finally oil cooled a hubbie!! HS3540

[hjns]

On my other motor I run regen braking so I don't use a back brake caliper so no worries about clearance there.

Hmm. I use regen AND a disc brake. I find that my regen braking just does not cut it in case of an emergency brake. In such a case, I want both my front and rear hydraulic calipers to be fully engaged in providing the maximum braking without blocking.

[amberwolf]

AW,
I hope I can count on you for the needed test info pervasively lacking, which is with and without oil no-load current and no-load speed. It will be important for determining optimum fill levels. I think the warmish covers is good in your test so far, but that's as long as much of the heat isn't new.

That's part of what I was going to start doing last night, but all the little issues ate up my time and I didn't get teh chance. So these will be done next chance I get to work on this project, when I have the sealant for the axle and the temperature sensor to install.

I can say that no load current appeared normal, from what I can remember of previous testing, but I need actual numbers at specific speeds to be sure, and to see any small differences that come up, which will affect efficiency (and thus heat).

[amberwolf]

FWIW, I did a little test overnight: I took some of the dried-up rubber cement off the outside of the lid and bottle, and left it soaking in a capful of ATF. Today before I left for work, about 13 hours after doing that, there was only liquid in the cap. ATF most definitely completely dissolves rubber cement, even if it's been dry for months!

So don't use it to seal an ATF-filled motor.

[Xanda2260]

Now that's cool. Eagerly awaiting further results AW,

Cheers

[dfar]

On my other motor I run regen braking so I don't use a back brake caliper so no worries about clearance there.

Hmm. I use regen AND a disc brake. I find that my regen braking just does not cut it in case of an emergency brake. In such a case, I want both my front and rear hydraulic calipers to be fully engaged in providing the maximum braking without blocking.

kids this is good advice,

[John in CR]

On my other motor I run regen braking so I don't use a back brake caliper so no worries about clearance there.

Hmm. I use regen AND a disc brake. I find that my regen braking just does not cut it in case of an emergency brake. In such a case, I want both my front and rear hydraulic calipers to be fully engaged in providing the maximum braking without blocking.

kids this is good advice,

It depends on the rig. I run regen as the only rear brake on my SuperV, and at 5.5kw peak braking it test the limits of traction. The only time I miss a rear mechanical brake on that bike is at very low speeds where there is no regen braking. On my cargo bike I run throttle activated regen with a very gentle stopping force, so yes that bike requires a rear brake.

John

[Andje]

I feel like skidding my rear tire in an emergency does not compare to instant full regen of about 5000w. I doubt my calipers can absorb 5000w as efficiently as my motor.

[hjns]

I feel like skidding my rear tire in an emergency does not compare to instant full regen of about 5000w. I doubt my calipers can absorb 5000w as efficiently as my motor.

Agreed. However, in an emergency stop, I use both regen AND calipers. The regen will bring me back to 20kmh only. Also, adding the brake force of my hydraulics to the regen allows for an even better controlled stop. And yes, of the 6kW power, 5kW may be produced by the regen, and another 1kW by my calipers, which is very nice.

[The Stig]

Well it sounds like the NZ geeks are having some luck with this oil cooling thing
http://www.ev.geek.nz/viewtopic.php?f=32&t=162&sid=7c6fe6e8b7a1a2f8e8879728ce4247fd&start=150

Anyone tried this with a 9C or MAC?