75-5 & 75-7 Motors - Looking for Test Engineers

Electric Motors and Controllers
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methods
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Re: 75-5 & 75-7 Motors - Looking for Test Engineers

Post by methods » Aug 17, 2016 1:02 pm

I would like to reiterate what Luke said about Craig...

Craig is an inspiring guy to work with. He shines brightest at that point in a project where things look impossibly difficult or complex. On more than one occasion I have walked away for a few days... come back... and he is just smiling with the solution.... built out in hardware... concept proven.

Its always an incredibly simple and obvious solution too - the one nobody thought of - and designed for manufacture-ability.
(Because he is a guy that actually manufactures things)

He is a bad-ass.

-methods



liveforphysics wrote:I can vouch Craig Calfee is the real deal, has exactly what he is offering, and is an amazing human being who has been a friend for many years.

ATB,
-Luke
"One test is worth a thousand opinions"
(of course... that is fechter's signature... and .... too important not to repeat)

John in CR
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Re: 75-5 & 75-7 Motors - Looking for Test Engineers

Post by John in CR » Aug 20, 2016 3:34 pm

You guys still need some testers? Other than desert riding I can provide just about any kind of real world testing needed, whether it's continuous load like with a boat, or extreme intermittent loads like up a mountain with a continuous 20% grade with low speed switchbacks.

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Re: 75-5 & 75-7 Motors - Looking for Test Engineers

Post by liveforphysics » Aug 20, 2016 7:22 pm

methods wrote:I would like to reiterate what Luke said about Craig...

Craig is an inspiring guy to work with. He shines brightest at that point in a project where things look impossibly difficult or complex. On more than one occasion I have walked away for a few days... come back... and he is just smiling with the solution.... built out in hardware... concept proven.

Its always an incredibly simple and obvious solution too - the one nobody thought of - and designed for manufacture-ability.
(Because he is a guy that actually manufactures things)

He is a bad-ass.

-methods



liveforphysics wrote:I can vouch Craig Calfee is the real deal, has exactly what he is offering, and is an amazing human being who has been a friend for many years.

ATB,
-Luke

I am enjoying one of his clever carbon wrapped rotors in my DSR now. Craig is an incredible mechanical genius craftsman, and really awesomely kind and driven person.
Each carcinogen vapor exposure includes a dice roll for cancer.

Each mutagen vapor exposure includes a dice roll for reproductive genetic defects in your children.

Each engine start sprays them into a shared atmosphere which includes beings not offered an opportunity to consent accepting these cancer experiences and defective genetics life experiences.

Every post is a free gift to the collective of minds composing the living bleeding edge of LEV development on our spaceship.

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Re: 75-5 & 75-7 Motors - Looking for Test Engineers

Post by Pajda » Aug 23, 2016 1:06 pm

Craig, Methods please check PM... I am still interested in.

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Re: 75-5 & 75-7 Motors - Looking for Test Engineers

Post by Pajda » Sep 21, 2016 4:10 am

Can someone tell me what is the 75-7 shaft diameter and keyseat dimensions? Thx.

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Re: 75-5 & 75-7 Motors - Looking for Test Engineers

Post by craigcalfee » Nov 15, 2016 9:43 am

Pajda wrote:Can someone tell me what is the 75-7 shaft diameter and keyseat dimensions? Thx.
Been traveling and neglected this thread.
Shaft is 1" and key is 1/4".
Craig Calfee

Calfee Design
Bicycles, E Bikes, E Motorcycles, Gyrocycles, Prototyping and Consulting
calfeedesign.com

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Re: 75-5 & 75-7 Motors - Looking for Test Engineers

Post by maeyhim » Jan 04, 2018 9:14 pm

Is this motor the 75-5R as used by motostudent? If so would you happen to have the torque vs rpm curve?

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methods
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Re: 75-5 & 75-7 Motors - Looking for Test Engineers

Post by methods » Apr 14, 2018 9:49 am

The motors have been out in some (safe) test vehicles now for some time now.

We have destroyed more than a few in high stress testing (thanks Craig, for absorbing the cost of validation...)

Ultimately...
We strive to find a motor which has no failure mode at high RPM.

This motor DOES have a high RPM failure mode (obviously) in the same way that every early model Zero has a failure mode.
Its boundaries MUST be respected... like... one respects a Series Wound Forklift Motor

That said
There are motors on the Dyno, on the commissioning station, and on the shelf...

That to the best of my ability -
Appear to perform as well or better...
Than the original Zero motors of 13', 14' etc.

If you are on the screaming edge of high RPM motorcycle performance - PLEASE - go with a late model Zero where the high RPM failure modes are properly addressed.

If you are instead looking to ... work with a genius like Craig Calfee... and ... to venture out on the R&D adventure we are on...

Then buy one.
(and please do not be a cheap-ass. Craig and I and many others busted ass to get a non-proprietary Sevcon system up and running)

Craig has, at his shop... the "fixings needed"... to build the equivalent of ... a Zero Motorcycle -
But with no black box

It is very complicated and easy to screw up.
It exists ONLY due to the support of people who have MUCH more time into it than I do

Tell you this...

If you are looking to build something out of this world ->

Craig is a guy who can make that happen.

....


The Batteries are not where I want to see them yet.
I have the "good" BMS's sitting on my bench
Craig has the "Good" pouches sitting on his bench

The Sevcon is dialed for the most part
The harnesses are dialed
The motors are dialed

We literally cover our time on this by selling lawn clippings to the dump, collecting cans, and polishing shoes at the Airport
(ok - not literally... but you gotta understand... this is EXPENSIVE R&D...)

In the end
In the BIG PICTURE
Its about laying groundwork for projects like Formula

We melted down the lego's into the core elements and cast them in new shapes.

Thanks Craig - for the lessons and time together.
I learned a ton

-methods
"One test is worth a thousand opinions"
(of course... that is fechter's signature... and .... too important not to repeat)

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