andrewjoseph wrote:The general concession from the people i contacted (can't remember exactly who), was: "there is a danger of the hub unscrewing due to precession if spun in the opposite direction while loaded."
I believe this is true of all hubs that are screwed together.
So no evidence of this actually ever happening or Shimano (or any big name brands) sending you an email to say the hub would unscrew? That's probably a good thing for me as the Dynamo hub I bought is a hub recommended by Shimano for disc brakes and further endorsed by my reputable LBS. http://www.rosebikes.co.uk/article/shim ... aid:515917
I've had my Dynamo hub on my disc brake wheel for 8 months now and I'm yet to see any evidence of it showing any signs that it is unsuitable for the task. I am also yet to hear or read on the Internet of anyone who has suffered any failure from using recommended centre lock products. I stand to be corrected and will post any actual eventualities should it happen to me.
I have heard that swans can break a man's arm but in the same vein I'm yet to meet anyone who has suffered this fate. [emoji6]
how many other people do you know have a rotor on the right fork blade? to use a hub dynamo i was told by staff at spa that it would have to use the hub 'reversed'. this could lead to the problems i mentioned.
-- Burls Ti Tourer for tarmac Saracen aluminium full suss for trails.
andrewjoseph wrote:how many other people do you know have a rotor on the right fork blade? to use a hub dynamo i was told by staff at spa that it would have to use the hub 'reversed'. this could lead to the problems i mentioned.
You'll only get honest answers from me: I've only had an interest in touring bikes with disc breaks and dyno-hubs for 8 months, so I haven't been particularly looking or researching it for long. Spa Cycles is a good outfit but I'd rather hedge my bets with Shimano and Surly. Your obs are a bit heresy and circumspect as there is no evidence to back up your (or these emails) theory. The best I can offer is I'll be the guinea pig and if my wheel explodes I'll be the first to hold my hands up. In the meantime: can't you swap yours out to the left somehow? You are much more mechanically savvy than I am so I'm just surmising. Or perhaps consider a Surly DT where the rotor is on the left [emoji6]
Thread drift to the extreme. [emoji57]Partly my fault. The Powertraveller R&D department are playing about with a smaller 'crank' and a wind turbine for the Explorer 2. I'm feeling all mushy and 'Heath Robinson' in this 5 minutes.
You're not getting it are you. I'm not saying ALL dyno disk hubs will have these problems, I'm saying MY setup would be risky to use, as the brakes and rotor are the RIGHT fork. Every other set up I've seen is on the left, as yours is. This is the way the dyno hubs are designed to work.
For my set up the hub would have to be reversed.
If you rode your setup with the wheel in the wrong way it would be reversed. This might cause problems. Possibly to the internal electronics, probably to the hub shell with screws together on all hubs i've looked at. If you really want to be a guinea pig, try it. Put your forks in back to front and go for a ride.
I don't have the emails as it was over 4 years ago. I delete most things over two years old.
As for swapping my brakes to the left, i can only assume you don't know what your talking about.
-- Burls Ti Tourer for tarmac Saracen aluminium full suss for trails.
It is a fact that running a dynamohub the wrong way round can* lead to its unscrewing the internals and I would never knowingly ride with it like that.
When I first used it I did put it in the wrong way (I work with the bike upside down and wasnt thinking about what I was doing when I wired it up). I think I did almost a hundred miles before I realised (with horror) what I had done, yet no harm done.
As a bit of a bike geek I look at things like that and have come across more than one bike with the dynamo in the wrong way and they had been ridden like that for quite a long time.
I recall Brucey who has pointed out this possible error has also pointed out how difficult it is to unscrew those same internals when you want to do so. So I wouldnt risk it again but I wonder has it ever actually happened in real life?
andrewjoseph wrote:You're not getting it are you. ... i can only assume you don't know what your talking about.
Wow AJ! By my own admission I am lacking the relevant knowledge hence my post/thread-tennis to get the facts straight in my mind. Take a look on this forum and you'll see there are loads of other things that are new or unnatural to me and I'd have no idea what I'd be talking about, but in the past you haven't insulted me about my ignorance so I'm surprised by your post. I'm a pragmatist and like to know that there are facts to back up anything I want to learn about. Your impatience doesn't get your point across well but perhaps you were having a bad start this morning. Evening Primrose could be a useful supplement to have with your breakfast. Although I don't have any personal experience to back this up.
This is a great forum and I've learned loads from it and I'm hoping to be a little more receptive to the knowledge you have AJ if only explained slightly differently.........b
meic wrote:It is a fact that running a dynamohub the wrong way round can* lead to its unscrewing the internals and I would never knowingly ride with it like that.
When I first used it I did put it in the wrong way (I work with the bike upside down and wasnt thinking about what I was doing when I wired it up). I think I did almost a hundred miles before I realised (with horror) what I had done, yet no harm done.
As a bit of a bike geek I look at things like that and have come across more than one bike with the dynamo in the wrong way and they had been ridden like that for quite a long time.
I recall Brucey who has pointed out this possible error has also pointed out how difficult it is to unscrew those same internals when you want to do so. So I wouldnt risk it again but I wonder has it ever actually happened in real life?
*Theoretically at least.
Thanks meic. I'm happy with the theory now. Hopefully we won't have to read about it actually happening I like your analogy of the upside-down bike. How teachers get to demonstrate things to a class full of kids by swapping left and right is beyond my intellectual agility........b
andrewjoseph wrote:You're not getting it are you. ... i can only assume you don't know what your talking about.
Wow AJ! By my own admission I am lacking the relevant knowledge hence my post/thread-tennis to get the facts straight in my mind. Take a look on this forum and you'll see there are loads of other things that are new or unnatural to me and I'd have no idea what I'd be talking about, but in the past you haven't insulted me about my ignorance so I'm surprised by your post. I'm a pragmatist and like to know that there are facts to back up anything I want to learn about. Your impatience doesn't get your point across well but perhaps you were having a bad start this morning. Evening Primrose could be a useful supplement to have with your breakfast. Although I don't have any personal experience to back this up.
This is a great forum and I've learned loads from it and I'm hoping to be a little more receptive to the knowledge you have AJ if only explained slightly differently.........b
I'm more than happy to to help people learn, as I learn from others myself. However, how many times did i say the brakes on my bike was on the right? Then you come back with '... happy to be a guinea pig...' Sarky comments about ' no actual evidence' "swans breaking arms...' 'heresy and circumspect' .
In short, practically calling me a liar or not knowing what I'm talking about, then admitting your own 'lack of knowledge'. Ignorance/lack of knowledge is one thing, but not believing what others are saying because you don't want to believe it, is quite another.
-- Burls Ti Tourer for tarmac Saracen aluminium full suss for trails.
andrewjoseph wrote:You're not getting it are you. ... i can only assume you don't know what your talking about.
Wow AJ! By my own admission I am lacking the relevant knowledge hence my post/thread-tennis to get the facts straight in my mind. Take a look on this forum and you'll see there are loads of other things that are new or unnatural to me and I'd have no idea what I'd be talking about, but in the past you haven't insulted me about my ignorance so I'm surprised by your post. I'm a pragmatist and like to know that there are facts to back up anything I want to learn about. Your impatience doesn't get your point across well but perhaps you were having a bad start this morning. Evening Primrose could be a useful supplement to have with your breakfast. Although I don't have any personal experience to back this up.
This is a great forum and I've learned loads from it and I'm hoping to be a little more receptive to the knowledge you have AJ if only explained slightly differently.........b
I'm more than happy to to help people learn, as I learn from others myself. However, how many times did i say the brakes on my bike was on the right? Then you come back with '... happy to be a guinea pig...' Sarky comments about ' no actual evidence' "swans breaking arms...' 'heresy and circumspect' .
In short, practically calling me a liar or not knowing what I'm talking about, then admitting your own 'lack of knowledge'. Ignorance/lack of knowledge is one thing, but not believing what others are saying because you don't want to believe it, is quite another.
No AJ. I think you are twisting everything and it's a shame you've taken it so personally. I wouldn't call anyone a liar or not believe them if it was a subject new to me. Without igniting your passion again: I get the theory, but being a pragmatist I was after examples of anything actually happening to demonstrate the discussed conundrum which was actually thread drift. I still haven't found any real-life examples. You? That said I'm happy with the theory so I'll save you the effort explaining further. Thanks.
My handbags are put away. Can you contribute anymore to the original post discussion?
Heltor, why are you happy to accept meic's explanation without proof? without asking for evidence of emails? without anything else other than his say so?
I'm not getting at meic, it's just he said pretty much what i said that you weren't happy with and wanted further evidence for. you consistently missed the point for several posts that i was talking about my setup only.
you started the sarcasm and then questioned my experience and integrity by practically demanding evidence.
you accepted meic's view without question. why?
-- Burls Ti Tourer for tarmac Saracen aluminium full suss for trails.
I'm mildly delighted with this little solar panel that came with the battery. I've been working in a greenhouse this morning and plugged my iPhone directly into the solar panel. In about an hour the phone got about 20% charge. It was reasonably sunny but with about 30% white cloud cover. I didn't set the panel up to face directly at the sun. I don't know anything about solar power but I wonder if the short wave rays in the greenhouse make a difference. I think I am seeing that there is some benefit to this little gadget. I managed not to fry my phone in the GH which is a good thing. (Or water it)
+ 1 for not impressed by my power monkey. Just not enough juice for iPads and iPhones and the solar did very little. I certainly can see a use for it on more pared down tours with limited access to electrics and modest use of gizmos but I'd prefer to get a decent hub charger if I was doing that. Just my opinion of course- I was travelling with the family and enough electronics to do a trip to the moon.
Finally the Sun is doing it's thing. Mowing and listening to Podcasts at work for 6 hours almost drained my iPhone. It got max charge on the school run and in a playground / picnic whilst sat on the back of my bike. I'm happy with that.
I'm still yet to give the battery which is an Explorer 2 the full shake-down. Dead useful for my job and sunny tours. There's something a little ethereal about getting something direct from the Sun.
The larger solar panel looks like an obviously more serious option for bigger/more devices...b
I like your analogy of the upside-down bike. How teachers get to demonstrate things to a class full of kids by swapping left and right is beyond my intellectual agility........b