Luke's commuter bicycle. What Non-hub is all about.

[maydaverave]

HAHA what is that? A 40 pound bike with 40 horsepower? I am surprised everybody kept it rubber side down.

[parabellum]

Now I want to be "reasonable man" when I grow up.

[ZOMGVTEK]

Think it might be possible to accurately log the power consumption on a few mile trip, at something like 16-18 MPH average? Yes, thats terribly slow, but it would be interesting to see real life efficiency at more common bicycle speeds.

What would really make those little frock bikes look dumb, is to have substantially more power and speed, along with comparable or higher efficiency to something like a 24V POS.

[Whiplash]

Agreed! I would like to see power consumption at normal speeds, you know, less than the speed if light! Lol!

[grindz145]

Jesus. H. Christ.

Is there a build thread for this? Missed it. Want to see the gore...

Edit: or should I say, which motor is in there now....

[RWP]

OK now, I like reliability, I like speed, I like yr' bikercycle

What is a sine/cosine rotor position encoder?
How does it work? Can a mere mortal make one?
I like pictures

[jmygann]

specs and pics ?

[Byte]

specs and pics ?

+1

Topspeed?

[nicobie]

No halls!

Paul D better watch out.

(that is if you get a REAL rear wheel and tire)

Did you ever get that shimmy out of the front fork?

Looks good Luke

[nicobie]

specs and pics ?

+1

Topspeed?

Radar gun had him at 67 mph on the short straight at the Grange race. I wouldn't be surprised if the damn thing goes 80+ mph on a long enough straight.

[Thud]

motor chart:
hmnnn CAN'T link some how'....here is the main page.
its the 10kw golden motor:
http://www.goldenmotor.com/

a little gearing will get 100mph easy.

[Byte]

Wow! That's fast on a bike!

@Thud: How does this motor compare to an Astro 3220? They cost about the same. The only difference is the power (the golden has 4kw more power) and the HUGE difference in weight. About 2kg vs 17kg? How can it be the golden weighs about 9 times as much as the astro but only has about twice the power?

[Whiplash]

R.P.M.

[Arlo1]

Wow! That's fast on a bike!

@Thud: How does this motor compare to an Astro 3220? They cost about the same. The only difference is the power (the golden has 4kw more power) and the HUGE difference in weight. About 2kg vs 17kg? How can it be the golden weighs about 9 times as much as the astro but only has about twice the power?

Yup rpm and thats part of why the astros fry so easy at low rpm.

[fechter]

No wheelies this time? Nice setup.
10 miles per tire could be an issue though. The battery probably lasts longer than that.

[Thud]

@Thud: How does this motor compare to an Astro 3220?

they compair like a red ryder BB gun to a .50 BMG (not at all )

If golden rated this motor in RC terms it would be a 40kw motor.

That golden will run a continuous 7kw without breaking a sweat. (loaded to 18kw input that motor is still showing 83% efficancy delivering 15kw to the output shaft)

Thats 3 times the deliverd power the best set up astro can deliver running at its ragged edge.

just a physical comparison should be enough to show the folly RC marketing #s are. I would be curious to know the exact %s of copper & magnetic energy in a straight up comparison between the 2.

[liveforphysics]

After spending a number of hours dyno'ing various motors, i don't believe that 8 of the 3220 astros running at full tilt could do the same power this motor makes. (Just my own wild guess)

The other difference, is that this motor makes its power at an RPM that lets you just connect it with a chain the the rear wheel.

[Ypedal]

exactly what a certain hawaiian has been preaching for years ...

[grindz145]

Your not water cooling that thing are you? I imagine the water cooled version could be Brutal...

[liveforphysics]

Your not water cooling that thing are you? I imagine the water cooled version could be Brutal...

I have the WC version on a shelf.
This is brutal enough for me. We are only running at like 60% controller settings.

[Bazaki]

Very very nice ! I love these extreme projects !!
Can you share the specs with us ??

[liveforphysics]

Very very nice ! I love these extreme projects !!
Can you share the specs with us ??

Sure, it's a simple parts list.

Scratch built cro-mo frame

White brothers groove 200 fork, shortened to 3" of travel by my buddy in like 15mins.

Motorcycle brake with floating rotor adapted to a bicycle hub

25S 25Ah of Nano's

This controller:

http://www.electricmotorsport.com/store ... 80_550.php


This motor fitted with external sine/cosine rotor position encoder:

http://www.goldenmotor.com/HPM-10KW%203D.jpg


Combine these parts with hours of a Sevcon controller tuning experts time on a motorcycle dyno (thank you Ryan), and you're set.


I took it to lunch today, riding with a friend on his motorcycle. A motorcycle cop had somebody pulled over on the side of the road. I slowed down to 25'ish, and made a show of turning the pedals as we passed by. No trouble. For around town, I think it's faster than being on a superbike, and WAY more fun to be able to get in the bike lane or sidewalk whenever you like. I really enjoy it. It's just a nice comfortable, quiet, clean, and reliable machine, that has never left me disappointed in the acceleration department. It's fun to ride up stair cases as well, it's just effortless, you can just torque up them as slow or fast as you want, never worry about stalling or something. Nice to get great parking in bike racks too.

I think it's my favorite 2 wheel'd transportation option right now, and this is coming a guy with 4 motorcycles, including the best possible dirt machine and the meanest superbike.

[Tom Tom]

You gotta ride it up Pikes Peak.

[Whiplash]

Lol they wouldn't have a clue, they would think he was in a motorcycle! Lol!

[neptronix]

You gotta ride it up Pikes Peak.

+1 +1 +1 +1
Please come out here and embarass whatever i've thrown together. But most importantly, embarass optibike.

They paved ALL of pike's peak this year, BTW.