Hub Dynamos in Australia

[Baalzamon]

Tested the Sunup Eco with a digital multimeter last night.
I recorded upto 10V with this and my light was consistently going dim around the 27kph mark. At this stage the multimeter was still reading over 7V so there may be an issue with my light now. I will be testing it with another dynamo

[Baalzamon]

So I just got back from a little ride with my Son 28 hub. Light was working properly. Put it back onto the Sunup and it wasn't working properly. Something is up between the 2 devices.

[Baalzamon]

A little quick clip showing the voltage this Sunup Eco is putting out. From 14.6kph down to 7.2kph it is a consistent 7.1 volts. I have measured .44A as well
Voltage is too high and ampage is too low which is what I think the issue is
For 6V 3W at 15kph I should be recording .5A and 6V not 7.1V with .44A which is giving me 3.124W

[il padrone]

So vote 1 for ze German reliability!!

[Aushiker]

A little quick clip showing the voltage this Sunup Eco is putting out. From 14.6kph down to 7.2kph it is a consistent 7.1 volts. I have measured .44A as well
Voltage is too high and ampage is too low which is what I think the issue is
For 6V 3W at 15kph I should be recording .5A and 6V not 7.1V with .44A which is giving me 3.124W

I hope you post this over at BROL if not already. There was some interest in this setup I believe.

Andrew

[rifraf]

A little quick clip showing the voltage this Sunup Eco is putting out. From 14.6kph down to 7.2kph it is a consistent 7.1 volts. I have measured .44A as well
Voltage is too high and ampage is too low which is what I think the issue is
For 6V 3W at 15kph I should be recording .5A and 6V not 7.1V with .44A which is giving me 3.124W

I hope you post this over at BROL if not already. There was some interest in this setup I believe.

Andrew

BROL? Hmmmmmmmmm
Considering your new affinity for all things bent might it be a safe assumption that your referring to http://www.bentrideronline.com/ ?
Have you mapped out your ideal electrics on your wishlist Andrew? What are the options for a Sinner Mango (trike?) with regards to a dynamo hub?

[Baalzamon]

A little quick clip showing the voltage this Sunup Eco is putting out. From 14.6kph down to 7.2kph it is a consistent 7.1 volts. I have measured .44A as well
Voltage is too high and ampage is too low which is what I think the issue is
For 6V 3W at 15kph I should be recording .5A and 6V not 7.1V with .44A which is giving me 3.124W

I hope you post this over at BROL if not already. There was some interest in this setup I believe.

Andrew

BROL? Hmmmmmmmmm
Considering your new affinity for all things bent might it be a safe assumption that your referring to http://www.bentrideronline.com/ ?
Have you mapped out your ideal electrics on your wishlist Andrew? What are the options for a Sinner Mango (trike?) with regards to a dynamo hub?

Yep posted over at BROL. Sinner Mango are providing I believe I spotted a son dynamo mounted mid drive

[il padrone]

What are the options for a Sinner Mango (trike?) with regards to a dynamo hub?

External - front wheel


Internal - mid-stage drivetrain (with Nuvinci, but could equally be done on a Rohloff)



Dynamo spins to charge up the batteries I believe (one charging, one in use)

[Aushiker]

Yep posted over at BROL. Sinner Mango are providing I believe I spotted a son dynamo mounted mid drive

The option in the current price list is for a mid-drive mounted Shimano dynamo.

Andrew

[Baalzamon]

There is a trike rider here in Perth that has the sunup eco. I think his is the model prior to mine, I am going to offer him to test it on a ride together and see if it behaves with his current setup or not.

[rifraf]

What are the options for a Sinner Mango (trike?) with regards to a dynamo hub?

External - front wheel

Internal - mid-stage drivetrain (with Nuvinci, but could equally be done on a Rohloff)

Dynamo spins to charge up the batteries I believe (one charging, one in use)

Thus endith the lesson - very well done.
Thank you IP

[Baalzamon]

Sorry for the delay. I referred the issue that you mentioned regarding the Supernova E3 lamp. the long and the short of it is that at low speeds the DS1-R probably wont generate enough power to service that model of lamp. However, the good news is that we will be bringing out a newer version that is aimed at addressing this very issue in time for the Taipei Cycle Show in March.

Interesting that they say that.... 27kph to get 3 LEDS up but they are no way bright compared to Son 28. At 27kph the lights are full on by Son 28

[rifraf]

Interesting that they say that.... 27kph to get 3 LEDS up but they are no way bright compared to Son 28. At 27kph the lights are full on by Son 28

So, aimed at the Cadel Evans end of the market I might hit that sort of speed going downhill but sounds way too energetic for my tastes My sondelux manages to wake up the edelux at a walking pace which as it happens is when I require the output. Nothing worse I can imagine spinning up large and creeping slowly up a incline and my lights going out My language would cause the wombats to flee

[Aushiker]

For those interested in dynamos Dave McCraw takes a look at the hub dynamo friction.

Dave concluded ...

When the difference between ‘good’ and ‘bad’ chain lube and two superficially similar tyres is around 30x more than the difference between an ordinary hub and a dynamo (daylight hours) and 4x more than the difference between an ordinary hub and a dynamo (at night), you’d better start asking hard questions about your chain cleaning products/routine and whether or not you should be splashing out on new tyres!

Most people, of course, can’t tell the difference between different brands of chain lube and perhaps not even between comparable models of tyre. Certainly it’s a popular comment by dynamo users that they can’t tell whether their lights are on or off (in daylight!)

Even sample variation between production runs of any particular tyre probably exceeds the drag of a hub dynamo with the lights on… but how many of us spend as much effort making sure to buy just the right examples of a particular model of tyre as we do avoiding dynamos?

For no-holds-barred maximum efficiency, obviously you want to bring your power with you in the form of batteries; but for 99.9% of us, there’s little real reason to avoid all the goodness of a fully self-powered bike…

Andrew

[just4tehhalibut]

Exposure, the lights people are getting into the dynamo market with a new repackaged dynamo and a new light.

Wiggle are now selling the Exposure light and rebadged SP dynamo hub. Sadly they sell the light for much $$$ separately but for $90 more you get the package with either a red or black dynamo hub. Only 28H or 32H available. If Wiggle have these maybe the market wasn't so good for an MTB dynamo headlight?
http://www.wiggle.co.uk/exposure-revo-mk1-dynamo-bike-light-with-use-hub-pack/

Wiggle are also about to sell (or resell) the Shimano dynamo hubs DH-3N72 but for about double what I can get them for in Germany, and they're old school designs. Prices are similar at SJS Cycles in the UK but at least they also sell the SP hubs and for not much more than current Ebay prices.

[il padrone]

I think Wiggle's problem is that xxcycle sells the same Shimano 3N72 dynamo built up in a wheel for not much more than Wiggle sell it alone. I have received one for $130 including shipping.

[Aushiker]

Another possibility to add to the mix ... The Siva Cycle Atom, a Kictstarter project. There is also a Gizmodo posting on it.

Personally I will be sticking to hub dynamos but this may appeal to some.

Andrew

[Aushiker]

Another option on the market it seems is the Velogical rim dynamo ...



The link to the manufacturer's page (translation) can be found here.

Andrew