Hi Brian I am a 73 year old from North Wales, Great Britain. I had a similar dynamo, (different shape) on my bike when I was a youngster in the 1950s. So the principle is not new. There was also magnetic resistance on mine when spinning it's rotor, it's quite normal and necessary! Been watching your videos for about two years. They are great. Love your enthusiasm. You have galvanised me into retrieving my late wife's 50 year old Hawk folder from the garage and rebuilding it. I now use it in preference to my 26" Raleigh Spirit. I am really enjoying the technical and logistical aspects of your preparations for your trip. Looking forward to coming on the trip with you, (from the comfort of my armchair) Have a safe and enjoyable adventure! Thanks again for all the hard work in producing such an entertaining and informative channel. Good luck!
I remember those too Maxton. My memory is of the knurled spindle end of the dynamo being turned by contact with the tyre, not the rim. There was a characteristic 'hum' and the resistance was noticeable if minor on the short journeys I used to undertake.
I think I still have the original bottle shaped dynamo in my garage attached to the remnants of a WWII paratroop (FOLDING!) bike frame made by the BSA (Birmingham Small Arms) factory between 1943 & 1945. My dad bought two of them, one for himself and one for me, for the princely sum of £1.65 ($1.95 USD) each in 1957. So the British and Canadian Paratroops we're riding their "bikes unfolded" a long time ago! Here are three links to information about "The Airborne" as it was called. The first link shows a pristine, unaltered, fully restored Airborne. th-cam.com/video/91TRqYIpAeY/w-d-xo.html The second link shows how to fold the Airborne: th-cam.com/video/cXTNCe5e2YE/w-d-xo.html The third link shows an interesting modification:, a forerunner of the ebike perhaps? (The video contains some interesting facts and diagrams about the unaltered Airborne in its folded and unfolded positions) th-cam.com/video/8qDbUlwiat4/w-d-xo.html There are more TH-cam videos on the Airborne out there, but I'll leave you to search for them!
Yes Brian, this is the way this device should be working. It is exactly the same as the old dynamo's from the early days. But this one connects to the rim and not to your tyre.
Notchy rotation is fully normal. It arises as a consequence of the multi-segment MAGNETIC nature of a generator ... analagous to a commutator in an electric motor.. basically an electric motor in reverse. Nearly all rotational generators are like this, including dyno-hubs. Try turning the axel/spindle in the middle of a dyno-hub when the wheel is off... same thing! Plug is tight? Good! Keeps rain out!
That was interesting, I never knew why the hub dynamos were 'crap', but as you explained it, it made sense. Still, it's disappointing with all the advancements they aren't a lot better. The Pedalcell looks like the same idea as the old "generators" that were around back when I was a kid in the 70s, they looked like little metal cans with a friction gear that you would 'snap' into place against the rear tire on the 10-speed and power the headlight and brake light. I never had one, too $$$ for me, plus I didn't ride at night...But yeah you could disengage it when not needed so the extra drag wasn't an issue...
Great video. I really enjoy watching your videos. I have a Dahon Mu and I make use of a lot of your advice about folding bikes. Regarding the product you used today, that is not new tech at all. I was a kid in the 70s and my Raleigh bike had a dynamo similar in design and worked on the same principal to provide electricity to the front and rear lights. It worked pretty well and outlasted the lifetime of my Raleigh.
Great Video. I have one on a full rigid salsa Fargo and have been mountain biking with it for about 4 months now. Ive taken it down many trails in the boise area that are too rough for full rigid just to see if it will hold up, never had an issue yet, even charging on rocky rutted downhills. So far so good for durability here, good luck with yours, they seem to charge devices quickly!
This is neat but not new tech, it’s an update to very old tech, i had a dynamo on my bike in 1981 which was driven off the tyre in a similar fashion & it powered my lights. Who knew that 41 years later it would charge a mobile phone!
@@ibikeunfolded I can’t believe it’s taken someone so long to do this. I’d like to see a really high quality and much smaller version that would keep a head unit charged. 🤞ps love the vids and looking forward to seeing your trip. Pps i ride a 2004 Dahon speed pro with the sram 21 speed dual drive! In mango!!
@@ibikeunfolded Nothing new about it. Bottle style bike dynamos have been around since 1890s. Hubs came along in 1930s, when Alnico magnets made them practical. Latest Neodymium magnets might transform output, so I am pretty sure they are working on it.
As someone saidbelow it is similar to old style dynamo used to power lights. The old style dynamo were metal so really solid. Notchiness is probably due to magnets in which could have to pass in order to generate electricity. I hated them as they cause drag and friction on the side of the tire as well as noise. But for your purposes it maybe quite good.
Love the video, Brian. I think that it’s okay to have this small resistance evenly placed over the whole rotation . I hope that there is not an extra resistance at any point of a single rotation. The resistance should also be a mild one without any sharp resistance I believe.
From that packaging it looked like a return. Pedalcell was marketing on TH-cam. They did not look like a company with big turnover. I also had problems with bottle dynamos in the rain. The one advantage I see for bike tourers is the dry weather charging. Keep up the great videos!
Well, it depends what you want. If it's "only" a reliable, drag-free, care-free light system for everyday use, no matter the weather, one cant go wrong with a dynamo hub from SON or (the more expensive of the two) from Shimano. They last for decades and, coupled with modern LED-lamps, are more than sufficient for a commuter.
I tried using a bottle dynamo with a rubber ring on the wheel rim. Despite numerous adjustments it always stopped spinning in rain, so no output. Most likely will happen on the Pedal Cell.
This one is spring loaded so no adjustment needed. As far as rain……I haven’t tested it in those conditions yet. I’m going to make in update video in a couple of months..
If you can connect it with lights that would be awesome because you will have a much more lumens out of this thing and never think about changing. See if you can do that or if there is a specific types of light that would go with it ?? Keep it up 👍🏻
I see they have going out of business I bought one before the end of the year and I just installed it I can't get it to work and I tried to contact them but s*** out of luck now so yeah
I wasn’t recommending…. I am out of luck myself.. I was trying it out to see if it would be a viable option. It had potential so this development sucks I have to agree.
The inner magnets are not too well glued to the spindle apparently, it's a good idea let down by a poor glue choice, which is rather a shame. Happily it is possible to repair by a competent electronics engineer - even the polarity is marked on the alternating magnets to keep you right, just add decent epoxy - a thin layer evenly, if you want it to perform again.
Your comment about the rim going around faster than the hub violates the laws of physics. However, the circumference of the rim is much greater than the hub. The green dot on the rim travels a greater distance than the green dot on the hub on every rotation of the wheel. More distance = more work = more energy. Every revolution of the wheel turns the rim generator more times than the hub generator thus producing more electricity. Does this make sense to you?
Maybe I did not articulate what I was trying to say properly. The rim doesn’t turn faster than the hub- the fixed point on the rim travels further faster in relation to a fixed point on the hub as it spins- or maybe is should have used gear ratios as an example…
@@ibikeunfolded - It might turn the generator faster, it might not, but it definitely turns it more times per wheel revolution at the same speed. The faster you pedal, the faster both hub & rim generator turns.
@@ziggarillo I didn't know what I meant, that's precisely why I commented. I quote "You'll notice that the green dot on the hub turns slower than the dot on the hub. This dot on the rim, in order to stay inline w. the dot on the hub has to obviously spin faster." Sorry, but putting incorrect information onto the internet serves no one. The internet is chock full of misinformation and it's detrimental to society. My middle school teacher wouldn't let that slide. It's worth getting things right for everyone's benefit. Brian isn't your child, you don't have to protect him. We can all be adults, hold each other accountable and aspire to get things right without getting feelings hurt.
Looking forward to more testing of this. You did not mention how much this costs? Wow looked it up 299 + 29.99 for usb cable. That is a lot it better work. Could you carry a small portable charger and charge your phone with one of these, just recharge the small portable charger at night while you sleep. This means you need electrical outlet at night. These things are not that expensive $20-$30. They can charge 2 to 4 phones. Depends on power needs and access to electrical. Weight is not real bad on these.
You must know this...this is not "thinking outside the box." In the 40s, 50s, and 60s, all bike generators operated exactly this way. A screw on chrome generator attached to the firm and could be pressed on to the wheel rim. This was how the lights on most bike light systems worked. The difference in all likelihood was resistance-which was significant. It felt like the bike slowed down by about 20-30% which the generator rubbed against the rim. So, the basis of this is in fact, very old technology.
Yes I know😃👍. Nothing is new under the sun…. I just meant I like companies that don’t follow the current trends. All companies are doing the “hub” dynamo and it seems nobody is improving the old school bottle dynamo. It’s a good idea and technology that needs to be improved on….not forgotten.😃👍
Brian, first, I appreciate and closely follow all your posts here. Secondly, I've had my current Brompton with the Shimano Dynamo light system (front and rear) since 2017 - 6-years now. I feel the Brompton provided set-up works awfully darn well: I find the front light strong enough, the rear as well, with the capacitor feature keeping it on for 90-seconds after stopping. It has taken a lot of pounding and keeps on "ticking." I don't expect that set up to charge my iPhone. You biked 10-miles and went up to 16%-doesn't seem very effective. Thanks.
Interesting. It would have definitely charged more if the phone were completely shut off (not practical in real world use but if you were in a real bind, you could do that). Thanks for sharing!
Man I hate hub dynamos for the same reason. They don't really generate enough juice to power anything but front/rear lights. It seems like a lot of money to just be lazy about remembering to charge our front/rear lights lol. You could get super nice detachable lights for cheaper than a hub dynamo and take it on any bike. I'm looking forward to your long term review of this, because I like the idea. I know these aren't new but I didn't know anyone was still making them lol.
...and Brian's intended use is not to power lights but a powerbank, so I too am interested in his longer term conclusions. I wonder if he'll get fed up of the resistance and the humming noise as I did many years ago on a different device utilising the same method of operation.
As an owner of the former Top, and now extra light, SuperlightM6LXBrompton, it is a - horrible bike with those small wheels and with a constantly braking the wheel, Dynamo Hub as an extra hindrance, it must be - absurdly horrible! I have bought a lot of extra titanium parts for mine and I love to be able to bring it anywhere, but as a bike it isn't really something!
Wow, you did 9.63 miles in 30 minutes, that is impressive! 😉 Have used this type of dynamos when they came with my childhood bikes, but back then they were only used for the lights. Who would have thought that some day they may be used for charging some sort of smart devices 😁 I guess in your case it will be a little bit less efficient when installed on the smaller rim brompton...
No, it'll be the same! The circumference of the brompton's wheel is shorter than a 20" wheel, and therefore it will revolve more times per mile. Therefore the tyre/contact distance will be the same and therefore the number of revolutions of the dynamo's rotor will be the same per mile. (Fewer rotations of the dynamo per wheel rotation, but exactly compensated by the increased number of rotations of the brompton's wheel per mile) Also, although the rim speed of the Brompton's wheel's rotational speed will be faster for a given road speed than that of a larger wheel, the number of rotations of the dymamo's rotor per wheel rotation will be proportionally less and the rotor speed will remain the same irrespective of wheel diameter. Therefore: 1. The number of rotations of the dymamo's rotor per mile will remain the same. 2. And therefore since the time taken to travel the mile remains the same irrespective of wheel size, the the speed of the rotor will also remain the same for the same distance. 3. If power output is a function of rotor speed, then the same power output will be obtained irrespective of wheel size. That should reassure Brian that he is not losing out on power generation using the Brompton's small wheel.
I like the frictionless magnetic ones. Some aren't that bright but some some are. The ones with a tiny magnet the size or a coin aren't worth your time. The magnets the size of standard size spoke reflectors work out better. Relight do both kinds.
They abuse their packages--I've witnessed (Amazon) how they SLAM-DROP (not drop as in an accident) but slam-drop packages to the floor and against other boxes--that's how much they hate their job, hate Amazon, and their customers. Can we see Bean to say "hello" in your vds?
This is a bottle dynamo. I stopped using them decades ago. They're inefficient and don't generate much power. Their only advantages are that you can move them from bike to bike and fully disengage them. Otherwise I'll take a hub Dynamo every time. Just because the dynamo is spinning fast doesn't mean it's generating more power. The number and size of the coils and strength of the magnets is more important
The magnets are causing the odd spin of generator, stop freakn out... there is a capacitor in black box, causing a minute wait before power...I'm more worried of your folding bronton..
honestly pretty concerning that you make a video claiming to know why one device is better than another, but dont have any basic understanding of how these alternators work beyond "they turn mechanical energy into electrical energy"
How do you know I have no basic understanding of how alternators work? It’s hard communicating in such a way as to allow everyone to have some sort of basic understanding so I give a childish explanation of the operation to give the most people a general somewhat basic understanding. I never claimed one device is “better than another!” I said “it charged better than a standard hub.” Perhaps you could come down off your pretentious high horse and cut people some slack before you accuse them of ignorance? Just a thought…🤨
@@ibikeunfolded because as soon as you see some creases on the box, you immediately start whining about how "ohhh, i dont like that" which is pretty insufferable and annoying. it was literally magnets. the fact that you didn't know why it would be snapping at set intervals show that you dont know how they work. why would a shot bearing snap at the same interval like that? how would a side impact even damage a bearing like that? it just shows you dont have a basic understanding of how they work, which is perfectly okay. 👍 there's a lot i don't know as well
@@dylan5048 *THANKS Brian* for making the great effort you did, taking time from your day, paying for the dynamo and making the video. IGNORE the non-positive and not helpful comments.
Hey friend, love your channel. I really wanted to refer you to GRIN TECHNOLOGIES in Toronto, they are the power problem solving geniuses of the bike world. Give them a call
Hi Brian
I am a 73 year old from North Wales, Great Britain.
I had a similar dynamo, (different shape) on my bike when I was a youngster in the 1950s. So the principle is not new. There was also magnetic resistance on mine when spinning it's rotor, it's quite normal and necessary!
Been watching your videos for about two years. They are great. Love your enthusiasm.
You have galvanised me into retrieving my late wife's 50 year old Hawk folder from the garage and rebuilding it. I now use it in preference to my 26" Raleigh Spirit.
I am really enjoying the technical and logistical aspects of your preparations for your trip.
Looking forward to coming on the trip with you, (from the comfort of my armchair)
Have a safe and enjoyable adventure!
Thanks again for all the hard work in producing such an entertaining and informative channel. Good luck!
I remember those too Maxton. My memory is of the knurled spindle end of the dynamo being turned by contact with the tyre, not the rim. There was a characteristic 'hum' and the resistance was noticeable if minor on the short journeys I used to undertake.
I think I still have the original bottle shaped dynamo in my garage attached to the remnants of a WWII paratroop (FOLDING!) bike frame made by the BSA (Birmingham Small Arms) factory between 1943 & 1945.
My dad bought two of them, one for himself and one for me, for the princely sum of £1.65 ($1.95 USD) each in 1957.
So the British and Canadian Paratroops we're riding their "bikes unfolded" a long time ago!
Here are three links to information about "The Airborne" as it was called.
The first link shows a pristine, unaltered, fully restored Airborne.
th-cam.com/video/91TRqYIpAeY/w-d-xo.html
The second link shows how to fold the Airborne:
th-cam.com/video/cXTNCe5e2YE/w-d-xo.html
The third link shows an interesting modification:, a forerunner of the ebike perhaps? (The video contains some interesting facts and diagrams about the unaltered Airborne in its folded and unfolded positions)
th-cam.com/video/8qDbUlwiat4/w-d-xo.html
There are more TH-cam videos on the Airborne out there, but I'll leave you to search for them!
That notchiness is normal for brushless generators, guy not lying. Hope it still works well.
A 6 month review would be spectacular
Yes Brian, this is the way this device should be working. It is exactly the same as the old dynamo's from the early days. But this one connects to the rim and not to your tyre.
Excellent in depth review. No punches pulled.
Thank you😃👍
Great review! Looking forward to updates on how it holds up in the long term
I’m hoping it hold up….🙏😬
Keep up the work Brian. Your videos inspired me. Just got myself a C Line last week. I use it for work commute, absolutely loving it!
Notchy rotation is fully normal. It arises as a consequence of the multi-segment MAGNETIC nature of a generator ... analagous to a commutator in an electric motor.. basically an electric motor in reverse. Nearly all rotational generators are like this, including dyno-hubs. Try turning the axel/spindle in the middle of a dyno-hub when the wheel is off... same thing!
Plug is tight? Good! Keeps rain out!
I wonder how well your pedalcell is performing after a year. I'm actually looking to buy one soon.
That was interesting, I never knew why the hub dynamos were 'crap', but as you explained it, it made sense. Still, it's disappointing with all the advancements they aren't a lot better. The Pedalcell looks like the same idea as the old "generators" that were around back when I was a kid in the 70s, they looked like little metal cans with a friction gear that you would 'snap' into place against the rear tire on the 10-speed and power the headlight and brake light. I never had one, too $$$ for me, plus I didn't ride at night...But yeah you could disengage it when not needed so the extra drag wasn't an issue...
Great video. I really enjoy watching your videos. I have a Dahon Mu and I make use of a lot of your advice about folding bikes. Regarding the product you used today, that is not new tech at all. I was a kid in the 70s and my Raleigh bike had a dynamo similar in design and worked on the same principal to provide electricity to the front and rear lights. It worked pretty well and outlasted the lifetime of my Raleigh.
Great Video. I have one on a full rigid salsa Fargo and have been mountain biking with it for about 4 months now. Ive taken it down many trails in the boise area that are too rough for full rigid just to see if it will hold up, never had an issue yet, even charging on rocky rutted downhills. So far so good for durability here, good luck with yours, they seem to charge devices quickly!
another great informative video exceptionally edited. great job 👏 👍 👌
Thank you, I appreciate that.😃👍
Lol, it's a rehash of the VINTAGE H. MILLER wheel dynamo I rode 50 years ago, great to see it back, just lacking the chrome, check it out online ;-)
The pricing is a concern...especially for material and longevity of this investment
This is neat but not new tech, it’s an update to very old tech, i had a dynamo on my bike in 1981 which was driven off the tyre in a similar fashion & it powered my lights. Who knew that 41 years later it would charge a mobile phone!
I know it’s not totally new- nothing under the sun is new- I just meant that it’s not as common as hub dynamos these days.😀👍
I had one around the same time that powered my lights, too. Nice to see it being repurposed for the electronic age! 📲
@@ibikeunfolded I can’t believe it’s taken someone so long to do this. I’d like to see a really high quality and much smaller version that would keep a head unit charged. 🤞ps love the vids and looking forward to seeing your trip. Pps i ride a 2004 Dahon speed pro with the sram 21 speed dual drive! In mango!!
@@ibikeunfolded Nothing new about it. Bottle style bike dynamos have been around since 1890s. Hubs came along in 1930s, when Alnico magnets made them practical. Latest Neodymium magnets might transform output, so I am pretty sure they are working on it.
Nice review, love the gadgets!
Great info.. do you plan to also run lights from it ?
As someone saidbelow it is similar to old style dynamo used to power lights. The old style dynamo were metal so really solid. Notchiness is probably due to magnets in which could have to pass in order to generate electricity. I hated them as they cause drag and friction on the side of the tire as well as noise. But for your purposes it maybe quite good.
Brian,thanks,this video was great 👍
Bonjour bryan ,tes video toujours au Top!bonjour for thé Belgium ♡
Do you feel like it adds resistance while pedaling? To be plain and simple: is it any harder to pedal?
Love the video, Brian.
I think that it’s okay to have this small resistance evenly placed over the whole rotation . I hope that there is not an extra resistance at any point of a single rotation. The resistance should also be a mild one without any sharp resistance I believe.
Has the PedalCell held up or has it broken? Thanks
From that packaging it looked like a return. Pedalcell was marketing on TH-cam. They did not look like a company with big turnover. I also had problems with bottle dynamos in the rain. The one advantage I see for bike tourers is the dry weather charging. Keep up the great videos!
Well, it depends what you want. If it's "only" a reliable, drag-free, care-free light system for everyday use, no matter the weather, one cant go wrong with a dynamo hub from SON or (the more expensive of the two) from Shimano. They last for decades and, coupled with modern LED-lamps, are more than sufficient for a commuter.
On the subject of the supposedly knackered bearings: all the bottle- and BB-dynamos I used for decades showed said "notchiness".
I tried using a bottle dynamo with a rubber ring on the wheel rim. Despite numerous adjustments it always stopped spinning in rain, so no output. Most likely will happen on the Pedal Cell.
This one is spring loaded so no adjustment needed. As far as rain……I haven’t tested it in those conditions yet. I’m going to make in update video in a couple of months..
Exellent review! Thanks a lot!
Great informative video!
Looks great mate. Sounds right with magnetic resistance.
If you can connect it with lights that would be awesome because you will have a much more lumens out of this thing and never think about changing.
See if you can do that or if there is a specific types of light that would go with it ??
Keep it up 👍🏻
Is it so noisy as I've heard in the video? And.. can you feel resistance as the standard dynamo?
🤔😁Brian - watch 1st few mins - bring back memory of my first Dynamo Hub. Same technology new design.
I see they have going out of business I bought one before the end of the year and I just installed it I can't get it to work and I tried to contact them but s*** out of luck now so yeah
I wasn’t recommending…. I am out of luck myself.. I was trying it out to see if it would be a viable option. It had potential so this development sucks I have to agree.
@@ibikeunfolded I got it going. I dont know what I did right . But it works great now @ibikeunfolded
I got it going. I dont know what I did right . But it works great now
The inner magnets are not too well glued to the spindle apparently, it's a good idea let down by a poor glue choice, which is rather a shame. Happily it is possible to repair by a competent electronics engineer - even the polarity is marked on the alternating magnets to keep you right, just add decent epoxy - a thin layer evenly, if you want it to perform again.
Your comment about the rim going around faster than the hub violates the laws of physics.
However, the circumference of the rim is much greater than the hub. The green dot on the rim travels a greater distance than the green dot on the hub on every rotation of the wheel. More distance = more work = more energy.
Every revolution of the wheel turns the rim generator more times than the hub generator thus producing more electricity. Does this make sense to you?
Maybe I did not articulate what I was trying to say properly. The rim
doesn’t turn faster than the hub- the fixed point on the rim travels further faster in relation to a fixed point on the hub as it spins- or maybe is should have used gear ratios as an example…
@@ibikeunfolded - It might turn the generator faster, it might not, but it definitely turns it more times per wheel revolution at the same speed. The faster you pedal, the faster both hub & rim generator turns.
@@ibikeunfolded You articulated it fine Brian - I understood clearly the point you were making.
You know what he meant, more revolutions of the dynamo per revolution of the wheel.
@@ziggarillo I didn't know what I meant, that's precisely why I commented.
I quote "You'll notice that the green dot on the hub turns slower than the dot on the hub. This dot on the rim, in order to stay inline w. the dot on the hub has to obviously spin faster."
Sorry, but putting incorrect information onto the internet serves no one. The internet is chock full of misinformation and it's detrimental to society. My middle school teacher wouldn't let that slide. It's worth getting things right for everyone's benefit.
Brian isn't your child, you don't have to protect him. We can all be adults, hold each other accountable and aspire to get things right without getting feelings hurt.
Hi Brian, great video, just a thought why don't you put a dynamo on both wheels. Just kidding.
Yeah bottle dynamos are often notchy
Looking forward to more testing of this.
You did not mention how much this costs? Wow looked it up 299 + 29.99 for usb cable. That is a lot it better work.
Could you carry a small portable charger and charge your phone with one of these, just recharge the small portable charger at night while you sleep. This means you need electrical outlet at night. These things are not that expensive $20-$30. They can charge 2 to 4 phones.
Depends on power needs and access to electrical. Weight is not real bad on these.
You must know this...this is not "thinking outside the box." In the 40s, 50s, and 60s, all bike generators operated exactly this way. A screw on chrome generator attached to the firm and could be pressed on to the wheel rim. This was how the lights on most bike light systems worked. The difference in all likelihood was resistance-which was significant. It felt like the bike slowed down by about 20-30% which the generator rubbed against the rim. So, the basis of this is in fact, very old technology.
Yes I know😃👍. Nothing is new under the sun…. I just meant I like companies that don’t follow the current trends. All companies are doing the “hub” dynamo and it seems nobody is improving the old school bottle dynamo. It’s a good idea and technology that needs to be improved on….not forgotten.😃👍
Brian, first, I appreciate and closely follow all your posts here. Secondly, I've had my current Brompton with the Shimano Dynamo light system (front and rear) since 2017 - 6-years now. I feel the Brompton provided set-up works awfully darn well: I find the front light strong enough, the rear as well, with the capacitor feature keeping it on for 90-seconds after stopping. It has taken a lot of pounding and keeps on "ticking." I don't expect that set up to charge my iPhone. You biked 10-miles and went up to 16%-doesn't seem very effective. Thanks.
Interesting. It would have definitely charged more if the phone were completely shut off (not practical in real world use but if you were in a real bind, you could do that). Thanks for sharing!
Man I hate hub dynamos for the same reason.
They don't really generate enough juice to power anything but front/rear lights. It seems like a lot of money to just be lazy about remembering to charge our front/rear lights lol. You could get super nice detachable lights for cheaper than a hub dynamo and take it on any bike.
I'm looking forward to your long term review of this, because I like the idea. I know these aren't new but I didn't know anyone was still making them lol.
...and Brian's intended use is not to power lights but a powerbank, so I too am interested in his longer term conclusions. I wonder if he'll get fed up of the resistance and the humming noise as I did many years ago on a different device utilising the same method of operation.
As an owner of the former Top, and now extra light, SuperlightM6LXBrompton, it is a - horrible bike with those small wheels and with a constantly braking the wheel, Dynamo Hub as an extra hindrance, it must be - absurdly horrible!
I have bought a lot of extra titanium parts for mine and I love to be able to bring it anywhere, but as a bike it isn't really something!
Wow, you did 9.63 miles in 30 minutes, that is impressive! 😉
Have used this type of dynamos when they came with my childhood bikes, but back then they were only used for the lights. Who would have thought that some day they may be used for charging some sort of smart devices 😁
I guess in your case it will be a little bit less efficient when installed on the smaller rim brompton...
No, it'll be the same!
The circumference of the brompton's wheel is shorter than a 20" wheel, and therefore it will revolve more times per mile. Therefore the tyre/contact distance will be the same and therefore the number of revolutions of the dynamo's rotor will be the same per mile.
(Fewer rotations of the dynamo per wheel rotation, but exactly compensated by the increased number of rotations of the brompton's wheel per mile)
Also, although the rim speed of the Brompton's wheel's rotational speed will be faster for a given road speed than that of a larger wheel, the number of rotations of the dymamo's rotor per wheel rotation will be proportionally less and the rotor speed will remain the same irrespective of wheel diameter. Therefore:
1. The number of rotations of the dymamo's rotor per mile will remain the same.
2. And therefore since the time taken to travel the mile remains the same irrespective of wheel size, the the speed of the rotor will also remain the same for the same distance.
3. If power output is a function of rotor speed, then the same power output will be obtained irrespective of wheel size.
That should reassure Brian that he is not losing out on power generation using the Brompton's small wheel.
I like the frictionless magnetic ones. Some aren't that bright but some some are. The ones with a tiny magnet the size or a coin aren't worth your time. The magnets the size of standard size spoke reflectors work out better. Relight do both kinds.
They abuse their packages--I've witnessed (Amazon) how they SLAM-DROP (not drop as in an accident) but slam-drop packages to the floor and against other boxes--that's how much they hate their job, hate Amazon, and their customers. Can we see Bean to say "hello" in your vds?
This is a bottle dynamo. I stopped using them decades ago. They're inefficient and don't generate much power. Their only advantages are that you can move them from bike to bike and fully disengage them. Otherwise I'll take a hub Dynamo every time. Just because the dynamo is spinning fast doesn't mean it's generating more power. The number and size of the coils and strength of the magnets is more important
The magnets are causing the odd spin of generator, stop freakn out... there is a capacitor in black box, causing a minute wait before power...I'm more worried of your folding bronton..
Well, instead of fixing the problem, pedalcell is shutting down...as of 2024
Figures
honestly pretty concerning that you make a video claiming to know why one device is better than another, but dont have any basic understanding of how these alternators work beyond "they turn mechanical energy into electrical energy"
How do you know I have no basic understanding of how alternators work? It’s hard communicating in such a way as to allow everyone to have some sort of basic understanding so I give a childish explanation of the operation to give the most people a general somewhat basic understanding. I never claimed one device is “better than another!” I said “it charged better than a standard hub.” Perhaps you could come down off your pretentious high horse and cut people some slack before you accuse them of ignorance? Just a thought…🤨
@@ibikeunfolded because as soon as you see some creases on the box, you immediately start whining about how "ohhh, i dont like that" which is pretty insufferable and annoying. it was literally magnets. the fact that you didn't know why it would be snapping at set intervals show that you dont know how they work. why would a shot bearing snap at the same interval like that? how would a side impact even damage a bearing like that? it just shows you dont have a basic understanding of how they work, which is perfectly okay. 👍 there's a lot i don't know as well
@@dylan5048 *THANKS Brian* for making the great effort you did, taking time from your day, paying for the dynamo and making the video. IGNORE the non-positive and not helpful comments.
Hey friend, love your channel. I really wanted to refer you to GRIN TECHNOLOGIES in Toronto, they are the power problem solving geniuses of the bike world. Give them a call