Do cyclone motors really eat up gears?

[John in CR]

if your battery is 48v 12a, total desity is 576watts right?

No, that's 576 watt-hours if your math is right.

edit; 576 watt-hours is equal to 2,073,600 watts...

If you really want to use watts/km, you can, but the numbers should look a lot different. If you use 20 watt-hours/km then you could also say that's 72,000 watts/km. :wink:

That's 2 million watt-seconds, not 2 million watts. FYI 1 watt-second = 1 joule = 1 newton-meter. The joule is the proper unit of energy for most situations, though the calorie (4.1868 joules) is fairly common too, but the watt-second/joule/newton-meter interchangeability is far better to make sense of things. Too bad they screwed the pooch regarding time. If a minute was 100 seconds and an hour 100 minutes, then things would really be easy as long as you didn't work an 8 hour day, since the day would be only 8.6 hours instead of 24.

 

[REdiculous]

A 100w light bulb is not a 100 watt-second light bulb because it'd be redundant. Wikipedia redirects "watt-second" to "Joule".

For our purposes the real difference between power and energy isn't that important...if you get 25 wh/mi then you use 90,000 watts/mi.

 

[boostjuice]

I saw that adapter and was looking at it again just the other day. However from what I can tell, the 16T gear ends up useless and you need to mount another larger gear back there for the motor. This works out well if you're using RC gear, but the cyclone motor already has reduction, and it just needs a second sprocket of about the same size as the pedal driven sprocket. I saw an adapter for nuvinci hubs, but nothing like that for plain old 3 prong styles.

Well if your happy to maintain a single chain to the rear hub then Sturmey Archer make a 14T and even 13T 3 prong sprockets, but only in 1/8", so you would have to change to BMX chain, a small cost to bear, and an upgraded chain life (if dead straight chainline). As you know the smallest 3/32" 3 prong sprocket Shimano makes is a 16T. I take it you understand there is an inbuilt freewheel within IGHs so there is no advantage to running a second 14T bmx freewheel at the hub input unless you are wanting to combine motor and pedal power at the rear wheel.

14T
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170507097052
http://bike.com/sturmey-archer-8th-...opZilla&utm_medium=CSE&utm_campaign=ShopZilla
http://www.hykehamwholesale.co.uk/store/prodView.asp?idproduct=2459
http://www.daycockscycles.co.uk/product/Sprockets_HSL714
http://abbotsfordcycles.com.au/public/content/view/53/73/
13T
http://www.sjscycles.co.uk/product-...cher-13T-Sprocket--1-8-Flat--HSL854-19322.htm
http://www.bikepartsexpress.com/C991/FW2200.html
http://bike.com/sturmey-archer-8th-...opZilla&utm_medium=CSE&utm_campaign=ShopZilla
http://www.amazon.com/dp/B003RLNLJ6...e=395261&creativeASIN=B003RLNLJ6&linkCode=asn

 

[Dingo2024]

I saw that adapter and was looking at it again just the other day. However from what I can tell, the 16T gear ends up useless and you need to mount another larger gear back there for the motor. This works out well if you're using RC gear, but the cyclone motor already has reduction, and it just needs a second sprocket of about the same size as the pedal driven sprocket. I saw an adapter for nuvinci hubs, but nothing like that for plain old 3 prong styles.

Well if your happy to maintain a single chain to the rear hub then Sturmey Archer make a 14T and even 13T 3 prong sprockets, but only in 1/8", so you would have to change to BMX chain, a small cost to bear, and an upgraded chain life (if dead straight chainline). As you know the smallest 3/32" 3 prong sprocket Shimano makes is a 16T. I take it you understand there is an inbuilt freewheel within IGHs so there is no advantage to running a second 14T bmx freewheel at the hub input unless you are wanting to combine motor and pedal power at the rear wheel.

14T
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170507097052
http://bike.com/sturmey-archer-8th-...opZilla&utm_medium=CSE&utm_campaign=ShopZilla
http://www.hykehamwholesale.co.uk/store/prodView.asp?idproduct=2459
http://www.daycockscycles.co.uk/product/Sprockets_HSL714
http://abbotsfordcycles.com.au/public/content/view/53/73/
13T
http://www.sjscycles.co.uk/product-...cher-13T-Sprocket--1-8-Flat--HSL854-19322.htm
http://www.bikepartsexpress.com/C991/FW2200.html
http://bike.com/sturmey-archer-8th-...opZilla&utm_medium=CSE&utm_campaign=ShopZilla
http://www.amazon.com/dp/B003RLNLJ6...e=395261&creativeASIN=B003RLNLJ6&linkCode=asn

the SA sprockets are available in 3/32" to fit Brompton folding bike here in the UK; I have a 13t 3/32" (thin chain) sprocket on my bike (it runs an 8 speed Nexus hubs)

this is where mine came from

http://www.simpsoncycles.co.uk/section.php?xSec=627

Ian

 

[geekybiker]

I saw that adapter and was looking at it again just the other day. However from what I can tell, the 16T gear ends up useless and you need to mount another larger gear back there for the motor. This works out well if you're using RC gear, but the cyclone motor already has reduction, and it just needs a second sprocket of about the same size as the pedal driven sprocket. I saw an adapter for nuvinci hubs, but nothing like that for plain old 3 prong styles.

Well if your happy to maintain a single chain to the rear hub then Sturmey Archer make a 14T and even 13T 3 prong sprockets, but only in 1/8", so you would have to change to BMX chain, a small cost to bear, and an upgraded chain life (if dead straight chainline). As you know the smallest 3/32" 3 prong sprocket Shimano makes is a 16T. I take it you understand there is an inbuilt freewheel within IGHs so there is no advantage to running a second 14T bmx freewheel at the hub input unless you are wanting to combine motor and pedal power at the rear wheel.

The second freewheel was so I could potentially ditch the crank freewheel. My next thought was if I can run two sprockets on the hub. 16T and higher are dished, so maybe if I go lucky two on them back to back would allow for two chains. I'd have to keep the current freewheel setup, but It's make it easier to balance the motor vs crank cadence. Plus it'd open up the possibility of moving the motor elsewhere in the future. I just wish I could get my hands on physical piece before I put an order in. More than likely I'll just end up buying a 14T sprocket, 1/8" chain, and a 48T ring from sickbikeparts since I know that'll work for sure.

 

[Miles]

My next thought was if I can run two sprockets on the hub. 16T and higher are dished, so maybe if I go lucky two on them back to back would allow for two chains. I'd have to keep the current freewheel setup, but It's make it easier to balance the motor vs crank cadence

Have you seen this thread? http://www.endless-sphere.com/forums/viewtopic.php?f=28&t=13532 ........... resulting in -> http://www.endless-sphere.com/forums/viewtopic.php?f=28&t=17602
Also: http://endless-sphere.com/forums/viewtopic.php?f=28&t=12449