boostjuice
10 kW
Miles said:Meanwhile...... this looks interesting: http://www.pinion.eu/en/index.html
-rubs hands together and licks lips in anticipation - ....only to be rudely shocked at the price i bet
Miles said:Meanwhile...... this looks interesting: http://www.pinion.eu/en/index.html
...comprising an input shaft (30) which can be connected to cranks (16, 16') on opposite sides for driving the vehicle, comprising a first partial transmission, wherein the first partial transmission comprises a countershaft, wherein a plurality of driving gear wheels is mounted on the input shaft (30), and wherein a corresponding plurality of driven gear wheels of the first partial transmission is mounted on the partial transmission shaft, wherein the driven gear wheels of the first partial transmission are designed as idler gears that can be connected to the countershaft by means of shifting means in a rotationally rigid manner, wherein the countershaft forms an input shaft of a second partial transmission, a plurality of second drive wheels being mounted on said output shaft, wherein the second partial transmission comprises an output shaft (32), on which a corresponding plurality of second driven gear wheels are housed, wherein the second drive wheels of the second partial transmission are designed as idler gears which can be connected in a rotationally rigid manner to the input shaft (60) by means of shifting means, and wherein the output shaft (32) of the second partial transmission is designed as hollow shaft that is arranged coaxially to the input shaft (30).
http://epo.worldlingo.com/wl/epo/epo.html?ACTION=description-retrieval&OPS=ops.epo.org&LOCALE=en_EP&FORMAT=docdb&COUNTRY=WO&NUMBER=2010072397&KIND=A1&T=1Hillhater said:... its that simple then ??? :?
If you're referring to the patent, the priority is to be completely unambiguous, not easily understandable.Hillhater said:PS .. a really cleaver person should be able to communicate his ideas in an easily understandable way !
Miles said:If you're referring to the patent, the priority is to be completely unambiguous, not easily understandable.Hillhater said:PS .. a really cleaver person should be able to communicate his ideas in an easily understandable way !
greenspark said:We have the Bafang BBS01 on the following bike hubs:
NuVinci N360 - Note that the warranty is good only for 250W (Eurospec). We find it shifts well with moderate power, but with full throttle, it feels stiff
Nexus 3 - The motor must be stopped to shift. If not, it makes a loud bang when pressure is sufficiently reduced to allow shifting. Because there is a delay this is a problem for riders who do not plan when going up hills. We plan to rig a button spliced into the ebrake to function like an electric clutch
SA 3 speed - Same issue as the Nexus, seems to work fine
SA 5 speed - Same as above, A bit tighter, a bit more worrisome
7-speed derailleur - Designed to be shifted when pedalling, but we note some loud noises when under full power.
None of these experiences report durability, only the impact of shifting. Bottom line is that the chain takes the sort of power a Lance Armstrong pumps in going up a hill. Logic suggests that this puts more strain on moving parts, but the bigger issue is shifting under power. The NuVinci is designed to solve that problem, but we will have to see if it holds up. For now, the person who can afford it should go the NuVinci N360.
We also find that with a motor, one needs fewer gears. A three-speed is usually sufficient. Up hills in 1st or 2nd, then cruise in 3rd. A wide range gear setting is best.
eMax said:Has anyone tried the SRAM G8?
https://www.sram.com/sram/urban/products/g8
Interestingly it can be shifted under load which might make it ideal for mid-drives. I havent seen any around apart from a few factory Focus Bikes with a belt drive.
Looks like a very clean IGH. Looking to pair with Bafang BBS02 on a Cannondale Bad Boy.
eMax said:Has anyone tried the SRAM G8?
https://www.sram.com/sram/urban/products/g8
Interestingly it can be shifted under load which might make it ideal for mid-drives. I havent seen any around apart from a few factory Focus Bikes with a belt drive.
Looks like a very clean IGH. Looking to pair with Bafang BBS02 on a Cannondale Bad Boy.
mjoets said:I have been using a Alfine 11 speed with a stock BBS-02. Though not recommended by the manufacturers it has performed flawlessly. I make every effort to shift with no power to the chain so anticipatory shifting is a must. I use it mainly on the road with lots of hills and I am heavy so it meets my needs.
I have a 300W BBS01 (that reads out 600W on full throttle) with a Nuvinci N360. It works. Period. No problems, it just changes the gear ratio.Supertux1 said:so what's needed is some sort of electronic clutch to reduce the strain during shifting.
So what to do? Would the most practical approach to be sticking with a quality cassette/shifter/chain and just laying off the throttle (boo) when switching gears?
greenspark said:I have a 300W BBS01 (that reads out 600W on full throttle) with a Nuvinci N360. It works. Period. No problems, it just changes the gear ratio.Supertux1 said:so what's needed is some sort of electronic clutch to reduce the strain during shifting.
So what to do? Would the most practical approach to be sticking with a quality cassette/shifter/chain and just laying off the throttle (boo) when switching gears?
Not sure what the effect would be of a 750W BBS02, but note that N360 warranty is not voided if used with a 250W Euro BBS01.
However an electronic clutch is a DIY job. Just splice an instant switch into the ebrake cable. An ebrake handle immediately cuts power, but it is an art to feather it just enough to cut power without applying brakes. So a switch that does the same thing but is not attached to the brakes is an electric clutch.
I also have a BBS01 on a 3 speed 1951 Raleigh DL-1 and I do feather the brake when downshifting up a steep hill. I find that going the other way (upshifting when going down hill) does not require a power cut.
greenspark said:Supertux1 said:I also have a BBS01 on a 3 speed 1951 Raleigh DL-1 and I do feather the brake when downshifting up a steep hill. I find that going the other way (upshifting when going down hill) does not require a power cut.