9c hub in 26" rim super slow wind with temp sensor

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DanGT86   10 kW

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9c hub in 26" rim super slow wind with temp sensor

Post by DanGT86 » May 23 2020 11:10am

Hello

This has been sitting around too long so I should probably sell it. Its in awesome condition and has very little use on it. Its always been stored inside. Its the slowest winding that I know of at 12 turns. Its perfect for a cargo bike or a low speed cruiser. If you have a high voltage setup like 20s you can get respectable power from this with a very cheap low amp controller. I had it paired with a 9Fet Lyen at 30amps and it always stayed nice and cool.

9 continent motor. I believe its from around 2012-2014
12x6 winding. Super slow approx 4.5kv. In the 26" wheel it will do 25mph on 80v
insides have been sprayed with boeshield corrosion inhibitor
10k ntc temp sensor added to the windings for temp monitoring
Rim is a sun rhyno lite 26"
spokes are Sapim 13/14g single butted with Sapim polyax brass nipples from Holmes hobbies
I built the wheel myself and have put at most 500miles on it. I used a park tool tension gauge and the spokes were re-tensioned after the first few rides so the wheel has been properly stressed and will need no attention unless you hit something. I'm a machinist and am super particular about things like this so lots of care was taken when building the wheel.

I'd like $150+shipping which would be about $30-40 within the US. With a used Maxxis hookworm 2.5" wide tire I'd like to get $175+shipping.

It's in Saint Louis Missouri.
9c front view.jpg
9c front view.jpg (179.98 KiB) Viewed 1373 times
9c connector view.jpg
9c connector view.jpg (136.6 KiB) Viewed 1373 times
9c rim.jpg
9c rim.jpg (164.03 KiB) Viewed 1373 times
Last edited by DanGT86 on Oct 25 2020 11:06am, edited 5 times in total.

unklegrumpknee   100 mW

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by unklegrumpknee » May 30 2020 8:43am

Is it front or rear?

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DanGT86   10 kW

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by DanGT86 » May 30 2020 9:01am

Rear.

Cant believe I forgot to say that in there. Sorry.

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by torker » May 30 2020 10:16am

I have 2 of these winds. Older ones. Love them . My 20 inch build runs 15 mph at 48 v. The 26 inches runs the same at 36v :bigthumb:
Dave When I die I want to slide in sideways yelling WooHoo what a ride !

Giant Rincon w rear 9C 6*10 36 v x 20 amps
Specialized FSR Comp 9C 6*10 48v x 30 amps

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DanGT86   10 kW

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by DanGT86 » May 30 2020 12:35pm

Its from the old days when controller choices were more limited and all the hubs had small phase wires. Over volting was the easiest way to get big power with little money. As long as you are not trying to go 35mph I still think this is the best way to have a powerful bike with a $40 controller smaller battery and small wires.

I just dont need it in my fleet and there are other odds and ends I'd like to buy.
Last edited by DanGT86 on Sep 10 2020 10:37pm, edited 1 time in total.

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DanGT86   10 kW

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by DanGT86 » Sep 09 2020 4:33pm

Price drop
$180 plus shipping
$205 plus shipping with tire

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Chrisheuer   1 mW

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by Chrisheuer » Sep 15 2020 2:51am

Hi you’ve got my interest here in Columbia mo. The problem is I’m kInd of a newbie but have been getting up to speed on the forum and grin videos. I’ve got 2 potential builds I’m thinking this might work for one is a front load trike the other is a lugged Nashbar 80’s mt bike. The situation is I’m a big guy 6’3” 290 and older 65 with a lot of bike riding experience. I’ve got a fair amount of bike mechanic skill. What caught my attention is the slow and the powerful. The Nashbar bike I’m looking to just cruise the Columbia rural roads and bike trails. I would need help picking a controller ,charger etc do you think this motor could work for my situation??

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DanGT86   10 kW

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by DanGT86 » Sep 15 2020 12:10pm

Possibly a good fit depending on how fast you want to go. Being a direct drive slow motor it will run with pretty much any controller on the market. With the more common 52v battery packs available right off the shelf you'd be looking at a top speed of about 15-18mph. If you run a higher voltage pack like 75v you can get into the 25mph range which seems much more common for ebikes. Cruising at 15 on flat ground would feel a bit slow in my opinion. Being new at ebikes I cant really recommend you jump right into custom batteries but I don't know your technical background.

If you matched this to a cheap $50-100 9Fet controller using a 20s pack and a CA3 to monitor temps you could get short peaks of around 2500-3000watts and have an efficient setup for 20ish mph cruising. To me that sounds like the perfect bike for a heavier rider or a cargo bike.

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Chrisheuer   1 mW

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by Chrisheuer » Sep 15 2020 9:39pm

So 20s pack refers to a higher volt battery like 72 volt. Is that what you ran it with.


Sent from my iPhone using Tapatalk

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DanGT86   10 kW

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by DanGT86 » Sep 15 2020 10:27pm

Yes. By 20s I mean 20 cells in series. Since almost everyone is using li-ion cells that are fully charged at 4.2v each then 20s is 84v full and about 74v avg.

Thats what I was using this motor with. When ebiking I prefer to cruise at around 20-25mph. Any slower than that and I'll just take a non electric bike. For me its more like light motorcycling.

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DanGT86   10 kW

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by DanGT86 » Oct 09 2020 4:03pm

Price drop

$160+shipping for the motor
$185+shipping with the tire

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DanGT86   10 kW

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by DanGT86 » Oct 25 2020 11:07am

Price drop
$150+shipping for the motor
$175+shipping with tire

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methods   10 GW

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by methods » Nov 14 2020 1:11am

Dont drop the price anymore.
I will buy it.

Sunday (day after tomorrow) I can paypal funds.

-methods
Increasing battery voltage and controller current limit will result in a non linear experience

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DanGT86   10 kW

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by DanGT86 » Nov 14 2020 9:50am

Awesome! This hub motor will have gone full circle in the universe. It originated from your premium 9c group buy so its only fitting that it ends up back in your hands.

Do you want the tire as well?

Also, the best shipping rate I can find is $50. Is that going to be a deal breaker?

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methods   10 GW

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by methods » Nov 14 2020 10:13am

I am happy to pay your original asking price. Shipping rate is fine and yes I want the tire - I like those.

For shipping, I always::

* weight the setup on a standard bathroom scale
* measured the LxWxH of the finished box in inches
* printed up a UPS Ground label from PayPal

I had a UPS account at the time, and prices have gone up, so shipping sounds reasonable to me. Just FYI, anybody can get a UPS account and I am (pretty sure) it affords you a discount. If not a discount, at the corners of pricing, some things are more reasonable (Where Volume crosses Weight). Just FYI - worth a minute of your time.

Failure Modes of Shipping
* Rainy Day
* Axle thru the side of the box

UPS hates boxes, so assume that you are going to roll it down half a flight of stairs. If you need to spend $10 extra on some foam or something for shipping, happy to pay it. If the box weighs a bit more because you double the cardboard over the axle, sweet.

...

As for the Universe...
Thank YOU sir for supporting the early efforts. Getting Temperature out of the motors was a core requirement for solving "The Last Mile". Smart controllers can now integrate riding style and (ride to ride) taper your burst current profile to get you the best tradeoff between off the line torque and back to back runs.

The Tesla Community has been figuring this out for the last 5 years....

...

You can invoice MethodsTechnology@gmail.com

...

FYI
PayPal has a good shipping system (or used to). My address is provided, then you can just punch out a shipping label in plain paper. Tape that down with "clear tape" (the kind from the "tape gun") and you can just drop the box at UPS instead of having to wait in line!!!! Prices are better and waiting in line at UPS ---> S U C K S. They always rip you. Super-Better to just show up with a box and drop it.

EH
No doubt my shipping address is incorrect - so lets talk about that before you ship. I will fix it on that dusty old PayPal account. I am squatting down by the beach in Santa Cruz, so I will need to get you a good address.

...
Thanks man!
Super stoked to work with an ultra-low KV motor again. I totally realize that the industry has taken off with fancy motor controllers but I want to play around with reverse engineering (a reverse engineered) Chinese unit. They are only 2 layer PCB with like 30 components on the board. Should be easy enough.

I am going to counter the (SUPER COMPLICATED) current trend by making the lamest Arduino controller imaginable. :mrgreen:

-methods
Increasing battery voltage and controller current limit will result in a non linear experience

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DanGT86   10 kW

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by DanGT86 » Nov 14 2020 12:15pm

Have you ever shipped with bikeflights.com? I was able to ship 2 hubs in a box for $40. They were 22" wheels but the box was huge. You buy the label from them and just drop it at UPS. They are the absolute cheapest I have found. I guess they must have negotiated some killer volume deal with UPS.

I'll get it packed up and then talk to you about shipping when we know more. Just give me a few days because its hard to find boxes this big.

I bought some thin teflon jacketed wire for this motor that I was going to pull through the axle years ago. I opened the motor and chickened out so I only ran the temp sensor wire and sprayed it with the rust inhibitor.

I can throw in the teflon wire and 4ml of Grin's Statorade ferrofluid if you think you will use it.

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by john61ct » Nov 15 2020 3:28pm


DanGT86 wrote:Have you ever shipped with bikeflights.com?
What about a batt pack included with other parts?


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DanGT86   10 kW

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by DanGT86 » Nov 15 2020 8:14pm

Not sure what you mean by that.

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by john61ct » Nov 16 2020 2:14am

Given the usual restrictions when trying to ship LI packs, is there an advantage besides cost savings using bikeflights, as opposed to UPS directly?

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DanGT86   10 kW

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by DanGT86 » Nov 16 2020 10:19am

Oh. I get it. They have complete ebike as one of the options on their pulldown menus but you have to be a certified hazmat shipper for lithium batteries.

Certification costs $200 and is good for 2 years. They recommend getting your cert through this place:
https://www.labelmaster.com/shop/traini ... -shipping/

You can also look for a certified lithium shipper through their bike shop finder:
https://www.bikeflights.com/bicycleshops

The shops that can ship ebike batteries have a lightning bolt icon next to them.

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by john61ct » Nov 16 2020 6:57pm

very helpful thanks

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methods   10 GW

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by methods » Nov 17 2020 8:23am

I got sucked back into the machine.
Deal is still on.

-methods
Increasing battery voltage and controller current limit will result in a non linear experience

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DanGT86   10 kW

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by DanGT86 » Nov 17 2020 10:09am

Cool. I found a suitable box yesterday. I'll try and pack it all up tonight to get a final size and weight to buy the shipping label and then I'll get you a final price. It looks like its going to be about $30-$40 for shipping. Seems reasonable to me.

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DanGT86   10 kW

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Re: 9c hub in 26" rim super slow wind with temp sensor

Post by DanGT86 » Nov 20 2020 11:34pm

Methods,

I sent you a PM. I finally got this all packed up and ready to ship.

Also, do you want me to send that 4ml of ferrofluid. My only other hub motor already has it so I'll likely never use this leftover fluid.

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