Lowell's X503 hub motor and wheel info

L

Lowell

100 kW
Joined
Jan 12, 2007
Messages
1,695
Location
Vancouver
Crystalyte X503 hub motor

DT spokes, unknown type, I just grabbed whatever the LBS had since I was in a rush

Arrow Racing DH rim, 37mm

Maximum tested input power, 7430W. Yes that's seven thousand four hundred.

Balanced each side cover off the hub, then balanced the whole assembly. Runs perfectly smooth at 124km/h free spin.

Maximum road speed as of May 22, 2007: 59mph.

0-100ft 4.5 seconds @ 28mph

4.25% hill, 49mph (May 22, new record)
 
Lowell, Thanks for the pics. I'm wonderding how this wheel is holding up as the 5X Crysatalytes either always or sometimes (to be determined) have wheel problems.

-- How many miles are on this wheel and how hard is the riding?

-- Do you have locktite in the nipples?

-- Is your 59mph down a big hill?

-- What is your flat, no wind no peddaling speed?

Thanks,
Al
 
Nimbuzz said:
Lowell, Thanks for the pics. I'm wonderding how this wheel is holding up as the 5X Crysatalytes either always or sometimes (to be determined) have wheel problems.

-- How many miles are on this wheel and how hard is the riding?

-- Do you have locktite in the nipples?

-- Is your 59mph down a big hill?

-- What is your flat, no wind no peddaling speed?

Thanks,
Al
Click to expand...

2213km now, but I'm not sure exactly when I changed the rim. I'm going to guess somewhere around 700km. I have a sport riding style and definitely do not baby it. Burnouts, wheelies, up and down curbs and the occasional trail. I have not had to adjust the spokes and the wheel has stayed perfectly balanced.

No loctite.

59mph one way speed on a relatively flat section of highway, with a tailwind. That was with my work backpack on, so there's no way it would pull that speed normally. Around 56mph is my best 2 way average on flat ground.
 
Nice one, I wouldn't get away with that much power here in the UK.

I think the slightly 'bent' nipples/spokes help in keeping the spokes tight by giving some lock force to the nipples and the bend in the spoke giving a spring effect.
 
Up curbs...

Somehow I'm guessing you have to slow down to <5kph to go up a curb with that motorbike...
 
Mathurin said:
Up curbs...

Somehow I'm guessing you have to slow down to <5kph to go up a curb with that motorbike...
Click to expand...

Up curbs is no different than any other hard tail bike, except I can use motor torque to lift the front wheel up 8)
Being able to go with the flow of traffic means sticking to the roadways for the most part.
 
I'll need a video to believe you can really hop a curb with that thing. I really can't even imagine that massive rear end getting even curb-height off the ground...
 
Lowell,

I too would be most interested in a video of a bunny hop (up a curb?) - because, franky, I can't see how you can get that thing off the ground either!

How much does that motor weigh anyway?

Scott
 
X5 hubs weigh a tad over 20lbs, plus spokes and wheel.

And I never mentioned anything about bunny hopping, although it might be possible since I have SPD pedals.
 
Lowell, hope you're planning a thread for that emoli pack.... :D

Let me guess.... 23S 10P ?

From the beginning I wanted to use emoli's, still too expensive though.
 
xyster said:
Lowell, hope you're planning a thread for that emoli pack.... :D

Let me guess.... 23S 10P ?

From the beginning I wanted to use emoli's, still too expensive though.
Click to expand...

25s booster pack to start with, and then if I like the cells, I'll keep adding more. Also, I might bump things up to 35s if I do the 5304/20" wheel setup on the new bike.
 
So your controller has the 150 volt FETS? I thought you had the 100 volt FETs...
 
xyster said:
So your controller has the 150 volt FETS? I thought you had the 100 volt FETs...
Click to expand...

I have a second 72v/35a controller here with the FETs off it already. :twisted:

It's a toss up between bolt on 150V FETs or something better.

I'm leaning towards the Innova 20x4.25" rear tire:
http://www.biketiresdirect.com/productdetail.asp?p=IKFC4
 
Hey Lowell ,if I am correct your present set up is 105v off the charger with the 100v fets. Is this o.k. ? . If have the same fets as you and I am debating adding a 4s or 5s emoli pack to my 37v x 2 nimh packs. Don't want to blow anymore fets .
 
greasypants said:
Hey Lowell ,if I am correct your present set up is 105v off the charger with the 100v fets. Is this o.k. ? . If have the same fets as you and I am debating adding a 4s or 5s emoli pack to my 37v x 2 nimh packs. Don't want to blow anymore fets .
Click to expand...

You're correct on the voltage. DrainBrain usually shows 104v when I plug the packs into the speed controller, and it falls below 100v fairly quickly. For anyone else, I would recommend 100v max, as that's what the FETs are spec'd for.
 
NiMH 2D cells, tested at 19.5Ah. 76 in series for 91.2v nominal, 105v hot off the charger. Range can vary from 40km to over 68km (longest I've tried riding it) depending on speed and current setting. If I slow down to 50km/h, range should be 80km based on my Wh/km, although I don't have patience to go that slow for any length of time, and certainly not for 1.5+hrs.
My normal trip is 33km, and I can cover that in 32.5 minutes on a good day.
 
Lowell said:
NiMH 2D cells, tested at 19.5Ah.
Click to expand...

Are these the Nexcell 2Ds?
How much did you pay per cell, where did you buy them?
How many cycles do you have on them, and how are they holding up?

-JD
 
Normal Crystalyte controllers limit the sustained current to 20, 35, or 40 amps, depending on the controller. Lowell modified his 35-amp controller to have a user-adjustable current (amperage) limit.
 
oatnet said:
Lowell said:
NiMH 2D cells, tested at 19.5Ah.
Click to expand...

Are these the Nexcell 2Ds?
How much did you pay per cell, where did you buy them?
How many cycles do you have on them, and how are they holding up?

-JD
Click to expand...

They're Nexcells from Ebikes.ca, pricing as per the website. I have 90 cycles on them and 2900km so far, and they're doing well.

The controller current limiting is done as Fechter describes in his controller mod thread. I use an external knob so I can adjust while riding.
 
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