GNG, 1000W 48V BB-drive, $400

[t3sla]

Have a look at these guys for an alternative fan blade setup for the new big motor
http://item.taobao.com/item.htm?spm...-4089-bb7f-7179497d2dcf&jlogid=p101351443dd59

 

[bzhwindtalker]

LR, Do you have some avaiable for sell? I will design my next freeride frame around this motor

 

[spinningmagnets]

Without an angled blade, what part of the motor would those paddles actually be cooling?

The design could have easily been improved, however it is a conventional industrial fan design for inrunner induction motors. Air is pulled into the center of the fan, and flung outwards. The sheetmetal housing re-directs the airflow to exit the housing blowing down the length of the short fins on the sides of the motor-case.

It's true that angled vanes would flow more air, but straight vanes allow the fan to work even when the motor is reversed.

 

[ferret]

Got the motor I ordered from Mister Tao today.

The total case width is 74mm.
The motor plate is approximately 12mm thick.
The back plate is 7mm thick.
The body width is 55mm like the one LR showed.

I believe the stock GNG motor is 68mm wide. Maybe the front and/or rear endplates are different?

Can anyone post their respective thicknesses?

This motor will not fit without modifications.

 

[kfong]

Nice Mike, I like it. With all that mass and since we are reaching the limits of the drive train. I'm thinking the fan might not be needed. This will keep it compact as well. Can't wait to get started!

The long awaited Big Block finally arrived from China today.

It's the exact same diameter as the GNG motor with the same end cases. The sucker weighs FIVE KILOGRAMS and most of that additional weight is magnets and copper windings. The stock GNG is about 2.7 kilograms. So we're talking about nearly twice the motor.

When I got the plastic fan cover off I was pretty disappointed. The motor case is not ported and the 'fan' blades are really just paddles. This pretty much looks like put a real fan on the shaft or cut the shaft short and put a closed case on it.

Look at the difference in those phase wires! That tells you something about power output.

It took me four weeks and three tries to get the order to go through. Shipping took almost two weeks after spending about $140. These are hard to get but it looks like it's going to be amazing. This one is going on a one-off FS bike with 100mm BB that Kin Fong and I are building.

 

[gknowes]

I believe this fan design is for an electric lawnmower

 

[christerljung]

The long awaited Big Block finally arrived from China today.

I can´t imagine what i would do with more power than i allready got from the GNG 1.0 But still... I want one of these

 

[spinningmagnets]

Bear in mind that LightningRods made certain to mention that the current custom project for this motor uses a 100mm wide BB-tube (as opposed to the common 68mm / 73mm).

I can also see this motor being used as an affordable high-amp left-side drive for a "longtail" bike such as the Yuba Mundo, set-up similarly to the LFP Death-Bike racer. Also for a fat-tire sand/snow bike?

Perhaps 1/8-inch wide BMX chain at a minimum, and even possibly #415H chain? (depending on availability of off-the-shelf [OTS] sprockets?). LFP used #428, but I don't think that will be necessary for the Big-Block...

edit: found a list of current fat-bikes...somebody is buying them. Advertised for sand and snow.

http://fat-bike.com/

Surly Pugsley
Surly Moonlander
Salsa Mukluk
Salsa Beargrease
Kona WO
9:zero:7
Moots Frosti
Origin-8 Crawler
Black Sheep Eon

 

[Denisesewa]

A good inexpencive canidate for this motor might be the Walgoose Beast , I purchased one just as a project and to use up some higher end parts I had laying around , It comes as a single speed with 4" wide tires and a coaster brake,frame is made of steel so fabrication work is easy, cost under $200.00 delivered when on sale. So far I have changed the hubs to a disc brake front and IG 3 speed disc brake rear, Drilled the rims , changed the bars, cranks, stem, seat and post , the BB is 100mm, There is a 24 page thread on these bikes here >>>

http://forums.mtbr.com/fat-bikes/mongoose-beast-modifications-846664-19.html


If I had the money I'd throw a big block in it, its kinda heavy but will be a blast in the snow.

 

[bee]

The long awaited Big Block finally arrived from China today.
It took me four weeks and three tries to get the order to go through. Shipping took almost two weeks after spending about $140. These are hard to get but it looks like it's going to be amazing. This one is going on a one-off FS bike with 100mm BB that Kin Fong and I are building.

I'd be interested in making a similar build, any chance you could get an extra motor shaft and attachment plates machined for me? I would go with 10ga or thicker steel for mounting a motor like this. Any plans on using a jackshaft, or will this be a direct drive on the left side?

 

[christerljung]

This motor is almost plug'n play on my Scott Gambler with BB-jackshaft. Maybe just upgrade chains. #219 in first red. and BMX half-link in final drive. Is BMX halflink possible to derallieure?
-Deinses, those red Dots are awesome!!

 

[ferret]

Sorry if I'm nagging, but could someone measure the thickness of the kit motor endplates so I can compare with the motor I got?

Thanks,
Avner.

 

[speedmd]

Hi Ferret

Your motor look identical minus 2 mm on drive side and about 1 -1.5 mm on fan side compared to mine. What did the motor cost with the shipping to your location. Let us know what the item number is with fan.

cheers

 

[ferret]

So are these the kit motor measurements?

Drive side plate - 10mm
Back plate - 6mm
Center - 55mm
Total - 71mm

I thought the the kit motor width was 68mm same as a BB shell.

The reason I am so anxious about this is that in my build I'm trying to fit the motor, 2 stage planetary reduction, 2 frewheels and various carrier plates and adapters within the 157mm space between the crank arms. literally every millimeter makes a difference and I was counting on the motor only taking up 68mm.

Details for the motor:

Item ID: 12456995329 Taobao Store: chinafyb

The motor cost $30
Domestic china shipping $3
Service and shipping fee (to Israel) $104

Total $137

 

[speedmd]

Your correct the center case is a touch (3mm) wider on your motor also. How wide is the stator /rotor. This may be a true 500 or 550 watt drop in with just a touch of turning work if you need to make clearance.

 

[ferret]

So the kit center case is only 52mm?

etching on the case reads 48V500W

Rotor thickness is 25mm.
Total stator laminations thickness 25mm.

End plates had no sealant and separated without tools.

Some more pictures:

 

[speedmd]

Where you are taking overall measurement mine varies a bit due to cover ribbing but mine is 70 -72 mm. Lot depends of how they machine the covers. You should be able to bolt it right up. Worst case you file the mounting tabs a touch.

Lamination stacks are identical. Not sure if the magnets are the same spec or wiring / gauges can handle more power but would bet they are a exact match.

 

[ferret]

I am measuring from the large flat face of the drive side plate to the large flat face of the fan side plate (as you can see from the pictures it has no external ribs).

I checked out a picture of the kit motor, it seems that while the width between the mounting plates may be 68mm, the actual width of the motor is more than that because there is a "bulge" in the rear plate that is "higher" than the surface the mounting plate bolts to.

I would guess that the motor specs are the same but there might be small differences because these motors are probably being manufactured at many different places.

 

[LightningRods]

Damn, I picked a bad time to get busy at work! I'll go back through the posts more carefully later and try to answer all of the questions. I have a minute and wanted to say a few things real quick.

If people are interested in this motor contact me and I'll put together a group buy to see if we can save anything on shipping. I won't mark anything up. Any savings we get as a group will be shared. If nothing else we can consolidate the major PITA that getting this motor seems to be. It took me a month to get it shipped and I had to order a total of three times. The cost to Kin and myself for this one motor was just under $200 all in. The motor was $55 and shipping it's gigantic eleven pound azz from China was about $140.

If people want a 'Gen 3' kit utilizing this motor I will do that. The case width is pretty much right at 100mm without fan so it's perfect for lucky people like Kin with high end DH bikes with 100mm BBs. It will be possible for 73mm BBs and dicey for the 68s. This motor should only go on beefy, overbuilt bikes. It will fold your Huffy like a taco.

Ferret, most of the motors you buy that look close to the GNG case width are a few mm wider. Luckily, my standard 68mm adjustable sheets have a motor bracket that is 73mm wide inside. I use two 2.5mm spacers inside of the motor sheets to space the 68mm GNG motor to fit. So with my 68mm sheet set you just leave the spacers out and it fits perfectly. I have a motor with exactly the same dimensions as yours.

I will build anything that you folks support. Let me know what you want and I'll get started!

 

[1KW]

Yep, go ahead and start making these kits! Wonder how Much more power it has.

Also curious to running it directly to a sprocket. What's the kv? Would be an amp chugger on a dd setup I feel.

 

[speedmd]

My Motor is more than 68mm, even at the mounting points. Closer to 70 mm by the ruler. Will get the calipers out later and measure a bit closer. Don't think there is much control on this dimension.

 

[LightningRods]

Spinningmagnets reminded me that Fat Bikes also have 100mm width BBs. How awesome would the Big Block be on this fatty?

http://616fab.com/frame/fat-2/

 

[Denisesewa]

Spinningmagnets reminded me that Fat Bikes also have 100mm width BBs. How awesome would the Big Block be on this fatty?

http://616fab.com/frame/fat-2/

$1800 for frame and fork ??? I think I like the idea of putting a bigblock in my Walgoose fatty better

 

[LightningRods]

$1800 for frame and fork ??? I think I like the idea of putting a bigblock in my Walgoose fatty better

The frame and fork is about all you have left of the original Mall Wart bike. I really like your upgrades. A single rear coaster brake on a two wheeler with over 10 horsepower on board seems like a very bad idea.

 

[2020freerider]

Damn, I picked a bad time to get busy at work! I'll go back through the posts more carefully later and try to answer all of the questions. I have a minute and wanted to say a few things real quick.

If people are interested in this motor contact me and I'll put together a group buy to see if we can save anything on shipping. I won't mark anything up. Any savings we get as a group will be shared. If nothing else we can consolidate the major PITA that getting this motor seems to be. It took me a month to get it shipped and I had to order a total of three times. The cost to Kin and myself for this one motor was just under $200 all in. The motor was $55 and shipping it's gigantic eleven pound azz from China was about $140.

If people want a 'Gen 3' kit utilizing this motor I will do that. The case width is pretty much right at 100mm without fan so it's perfect for lucky people like Kin with high end DH bikes with 100mm BBs. It will be possible for 73mm BBs and dicey for the 68s. This motor should only go on beefy, overbuilt bikes. It will fold your Huffy like a taco.

Ferret, most of the motors you buy that look close to the GNG case width are a few mm wider. Luckily, my standard 68mm adjustable sheets have a motor bracket that is 73mm wide inside. I use two 2.5mm spacers inside of the motor sheets to space the 68mm GNG motor to fit. So with my 68mm sheet set you just leave the spacers out and it fits perfectly. I have a motor with exactly the same dimensions as yours.

I will build anything that you folks support. Let me know what you want and I'll get started!

lR,

I'd be in on a group buy. How do you think this motor would be on my Specialized Demo that you've been designing for? It has an 83mm BB.


Cheers,
Joe