Malcolm
10 kW
Me tooi'd like to see an etek on it.
Me tooi'd like to see an etek on it.
approx 500 bucksEbikeMaui said:How much does the Da Vinci Cost ?
EbikeMaui said:The perk is that with the free hub is a grat place to mount 2 freewheels and sprockets for two INDEPENDENT chain drives both sharing the 3 hub gears in common with total freewheeling!
EbikeMaui said:Another option is the 5 speed Sparc. hub motor.
Lowell said:So the power transmission ability is a function of the size and number of balls... :lol:
First you have a die maker make a die to spec then use a broaching machine. OR for anyone with a lathe or a drill press the freewheel threads can be ground down to a press fit onto the freehub and captive pin hole drilled with 1/8" titanium Drill bit if you know what you are doing.A pn is then inserted holding each freewheel securly from spinning on the freehub. Not as hard as anyone may think espically if the freewheel company will do it all for you.Just like sliding on a cassette! or two.TylerDurden said:approx 500 bucksEbikeMaui said:How much does the Da Vinci Cost ?
EbikeMaui said:The perk is that with the free hub is a grat place to mount 2 freewheels and sprockets for two INDEPENDENT chain drives both sharing the 3 hub gears in common with total freewheeling!
That's cool. (how do you "broach" the clutch bearing for spline-mount?)
EbikeMaui said:Another option is the 5 speed Sparc. hub motor.
That's cool too. Price?
2 Two size D flashlight batteries. Options options are somethings we must all love to like! pick and choose... more $ the more fun!Lowell said:$500 to make? What kind of battery power?
It is much more important to run a motor through a adjustable ratio than JUST having a whimpy addition of 75 watts of human power use such a expensive hub.Espicaly when a Sram DD hub works perfect for both pedaling and motor power going through the 3 speed hub.And it only cost 60 bucks whosale.Go figure. :lol:TylerDurden said:At the wholesale level, the NuVinci might add 200-300 bucks to the price of your bike. It could also add some additional brand-strength to the total concept.
The tricky part is not the branding or the titanium balls, it's the legal hurdles in the islands. That situation will take real lubrication.
If you can demonstrate marketability in the contiguous 48, you might get some VC attention.
:?
Thinking and doing are quite different! It depends who is doing the rating opposed to REAL WORLD testing.Ask Bike Friday Bike and Tandem owners if they have had any Sram Dual Drive Hub failures.Lowell said:I think the NuVinci was rated for a bunch more power than could safely be put through an Sram hub.
EbikeMaui said:Everyones in dreamland with a variable that has not been well tested while Sachs has been making millions of quality motorcycle and bicycle gearboxes for a long time,,.. :lol:
That works both ways. Who else has tried out the latest Sram DD Hub WITH a 200 to 2000 watts of motor power through the gears ? let alone pedal power at the same time using the 3 speeds?Toorbough ULL-Zeveigh said:EbikeMaui said:Everyones in dreamland with a variable that has not been well tested while Sachs has been making millions of quality motorcycle and bicycle gearboxes for a long time,,.. :lol:
Right.
so let's throw out the baby with the bathwater & not even give baby a chance to crawl, let alone run.
EbikeMaui said:That works both ways. Who else has tried out the latest Sram DD Hub WITH a 200 to 2000 watts of motor power through the gears ? let alone pedal power at the same time using the 3 speeds?Toorbough ULL-Zeveigh said:EbikeMaui said:Everyones in dreamland with a variable that has not been well tested while Sachs has been making millions of quality motorcycle and bicycle gearboxes for a long time,,.. :lol:
Right.
so let's throw out the baby with the bathwater & not even give baby a chance to crawl, let alone run.
A arguement won;t change the facts.keep on testing! The baby you speak of has a lot longer to to go before it makes any grades..
EbikeMaui said:Thinking and doing are quite different! It depends who is doing the rating opposed to REAL WORLD testing.Ask Bike Friday Bike and Tandem owners if they have had any Sram Dual Drive Hub failures.Lowell said:I think the NuVinci was rated for a bunch more power than could safely be put through an Sram hub.
How would you hook up a Da vinci to be used with both the Motor and pedals with a direct drive motor to the hub trans as well as a muli speeds for pedaling? without a derailer ? for under 60 bucks ? A statton hub alone cost over twice that for a 1 speed hub.If you wanted to use a 1 motor speed the disc brake mount a Sram DD hub can support the motor Drive sprocket and utilize the 3 speeds foe pedaling and would still be hundreds less than a D Vin and much stronger. 2000 watts of power will NOT break the Sram/Sachs hub if put together right. Everyones in dreamland with a variable that has not been well tested while Sachs has been making millions of quality motorcycle and bicycle gearboxes for a long time,,.. :lol: Sorry but I have to laugh the irony of paying more for less because a hub has a Da Vinci sticker...
EbikeMaui said:Thinking and doing are quite different! It depends who is doing the rating opposed to REAL WORLD testing.Ask Bike Friday Bike and Tandem owners if they have had any Sram Dual Drive Hub failures.Lowell said:I think the NuVinci was rated for a bunch more power than could safely be put through an Sram hub.
How would you hook up a Da vinci to be used with both the Motor and pedals with a direct drive motor to the hub trans as well as a muli speeds for pedaling? without a derailer ? for under 60 bucks ? A statton hub alone cost over twice that for a 1 speed hub.If you wanted to use a 1 motor speed the disc brake mount a Sram DD hub can support the motor Drive sprocket and utilize the 3 speeds foe pedaling and would still be hundreds less than a D Vin and much stronger. 2000 watts of power will NOT break the Sram/Sachs hub if put together right. Everyones in dreamland with a variable that has not been well tested while Sachs has been making millions of quality motorcycle and bicycle gearboxes for a long time,,.. :lol: Sorry but I have to laugh the irony of paying more for less because a hub has a Da Vinci sticker...
What Market Place is that? And who has a prototype of a hub motor driving a da vinci in the wheel ? Dreams ! :lol:Lowell said:EbikeMaui said:Thinking and doing are quite different! It depends who is doing the rating opposed to REAL WORLD testing.Ask Bike Friday Bike and Tandem owners if they have had any Sram Dual Drive Hub failures.Lowell said:I think the NuVinci was rated for a bunch more power than could safely be put through an Sram hub.
How would you hook up a Da vinci to be used with both the Motor and pedals with a direct drive motor to the hub trans as well as a muli speeds for pedaling? without a derailer ? for under 60 bucks ? A statton hub alone cost over twice that for a 1 speed hub.If you wanted to use a 1 motor speed the disc brake mount a Sram DD hub can support the motor Drive sprocket and utilize the 3 speeds foe pedaling and would still be hundreds less than a D Vin and much stronger. 2000 watts of power will NOT break the Sram/Sachs hub if put together right. Everyones in dreamland with a variable that has not been well tested while Sachs has been making millions of quality motorcycle and bicycle gearboxes for a long time,,.. :lol: Sorry but I have to laugh the irony of paying more for less because a hub has a Da Vinci sticker...
The pedal chain would work the same way as a Crystalyte hub, and the hub motor drive would be integrated with the NuVinci CVT. Since sales of your drive system are about the same as NuVinci (Zero) I don't think the price matters much at this point.
The only people in dreamland are the ones that dream about more efficient motors and changing the marketplace.
Lowell said:Why isn't your setup for sale anywhere if it's so good? If it was truly worthwhile, someone would have made knock offs on a production scale, since the info has been around on the internet for quite some time.
The NuVinci hub has no real availability yet, but at least it's a real product with real support.