[python] Re: Arm-assist pedalling
- From: Vi Vuong <vi_vuong@xxxxxxxxx>
- To: "python@xxxxxxxxxxxxx" <python@xxxxxxxxxxxxx>
- Date: Sat, 11 Jan 2014 21:28:10 -0800 (PST)
I also tried moving my arms together in pedalling motion, and got a strange
feeling that the bike is slowing down and speeding up with the upper body
motion, like rowing? The article mentioned that pedalling out of phase (180
deg) is most efficient, perhaps on a stationary bike, not sure if there is side
effect on python...
Vi
>________________________________
> From: bepb <bepb@xxxxxx>
>To: python@xxxxxxxxxxxxx
>Sent: Saturday, January 11, 2014 3:22 PM
>Subject: [python] Re: Arm-assist pedalling
>
>
>Hi Marek,
>guess I was coming from my python which uses a geared hub. Adding a
>second sprocket should be possible and you could still build like this.
>But you are right, considering a dérailleur configuration, two separate
>chains toward the hub are not possible without losing the gearing.
>The tandem-drive would solve this.
>
>Gerald
>
>Am 11.01.2014 15:36, schrieb bnmm@xxxxxxx:
>> ...so a new tube would be needed, see tandem-drive2.png-
>> Marek
>>
>> On 11.01.2014 15:14, bnmm@xxxxxxx wrote:
>>> Hi Gerald,
>>>
>>>
>>>> Besides the option off pressing on your thighs, obviously you cold
>>>> add an additional crank set for the hands like this:
>>>> Python_with_add_hand_drive
>>> Wouldn't that require two synchronized gears? How about
>>> tandem-drive.png? The additional gear train (green) would be a direct
>>> transmission on the left side, so a tandem drive chain would be needed.
>>>
>>>
>>> Best regards,
>>> Marek
>>>
>>
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