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  1. footloose

    saved money = earned money = bike parts...

    Think it was Ben Franklin who said "a penny saved is a penny earned". When I was a kid I never understood what the heck he meant. Somewhere along the line I figured it out. So this week a 25 year old Record vise on my workbench crapped out suddenly. You could spin the handle all you wanted, but...
  2. footloose

    Recall: SRAM Avid SD7 bicycle mechanical rim brake

    FYI, in hopes this info helps others: Single Digit 7 brakes ("Avid SD7 bicycle mechanical rim brake") manufactured from June 2014 to May 2017 have been recalled. Date code is printed inside brake arm. If you have a set, you can return them to SRAM for exchange. Talked with an SRAM rep this...
  3. footloose

    Baltimore Electric Bike Share Program

    Thumbs up to Baltimore! She surprised me. I grew up near here, and frankly never associated Baltimore with much beyond bad politicians (remember Spiro Agnew?) and good crab cakes. But I'm here right now on business. When I was walking around yesterday, saw some of those 'ride share' bikes...
  4. footloose

    Candidate for worst 'bike' design of 2016?

    A neighbor was thinking about buying one of these, and I received this link. When I opened it and saw this thing, my first thought was “oh no” and my gut got queasy. The original penny-farthing bikes had a problem: their tendency to kill or maim riders through over-the-handlebars accidents...
  5. footloose

    Extremely basic charging questions

    Logic tells me that answer to these questions is "yes, obviously". But my logic has been wrong before, so it doesn't hurt to ask. Assume a 1s4p battery built of 3Ah cells, each capable of 6A (2c) continuous discharge. Because capability of paralleled cells is multiplicative the battery would...
  6. footloose

    Bamboo / BBS02 / Nexus IGH

    Have begun a project to build a bamboo-framed mid-tail bike with BBS02 750W and Nexus 8 IGH. Wanted to build a bamboo frame for several years. Got the necessary bamboo for tubes back in 2013. It’s been air drying since then. My gut instinct is that bamboo has ample strength for a mid-tail...
  7. footloose

    Q100 / INR18650-20R NCA 48V 6Ah Battery / 20” Wheel / Gener

    About a year ago –dg and I talked about a pretty cool project to evaluate several small front-wheel drive motors, and thoroughly document their relative characteristics. But I flaked out and took way too long on my parts of the project, so it kind of died. But recently I did end up getting a...
  8. footloose

    Went to fixed-ratio gearing today

    No big deal, but I went to a fixed-ratio today and am pretty happy with result. Bike is 26" MTB with MAC 10T motor, 9FET controller, '48V' EM3ev NCM battery. My environment: lots of steep hills, with stops signs and busy intersections at top of some. Had been running 7-speed setup, but...
  9. footloose

    What crashed E-S ?

    Got up this morning, brewed coffee, sat by fireplace, fired up iPad and took a look at E-S. Message "SQL query can't read index table" or some such. Uh oh, cold turkey time. Jeez, left me me with no alternatives but to do something in "real" world :wink: Took a bike ride (pedal bike), fixed...
  10. footloose

    Creating a battery that can be used as 5s or 6s?

    Need advice, please. Is what I'm proposing reasonable, or is it not? Currently I have 3 hand-built battery packs, each consisting of 6 A123 cells in series yielding a nominal 19.8V / 2.3Ah. They are then connected in parallel, creating a larger pack that yields 19.8V / 6.9Ah (6s3p config) I use...
  11. footloose

    9 Lives? (Re: Porsche Crash)

    I think I'm a pretty 'normal' e-bike enthusiast. And I think most e-bike enthusiasts probably... take some risks in life. They say cats have 9 lives. How many do we have? I'm ~60 years old. In my life, at least 5 events could have killed me. In fact, a couple of them should have. Should...
  12. footloose

    Glorious day for a ride / Time to swap continents

    Glorious day for a ride here in California! Caught up on work kind of, and decided to go for a ride. (~20 mph, ~20 Wh/m, just a nice cruise.) Going to start raining and getting wintery here soon :-( Anyone in AU / NZ / Argentina / Southern hemisphere have a nice place for me and spouse to stay...
  13. footloose

    Down Haleakala on 1.26 Million Foot Pounds Stored Energy

    Greetings friends, I'm a lucky guy, I'm in Maui and meeting 3 friends tomorrow to ride down Haleakala (the big volcano) from ~6,000 feet to a bit above sea level. Riding the way I like it best: there are pedals on the bike, but only for emergency use. I did this ride about 10 years ago, and...
  14. footloose

    CA2.3 / 'Regen' Ah

    Recently my system has begun doing something strange. Motor = Mac 10T Controller = Infineon 9FET from EM3EV CA V2.3 Battery is hot off the charger, ~58v In past, I saw only minor Regen, typically when coasting downhill. Today, noticed for first time something strange. When bike is sitting...
  15. footloose

    Farmer's market

    No big deal, but interesting. Beautiful spring morning here in coastal suburban California. Decided to ride my bike to Saturday farmer's market at local community college campus couple miles away, check out the peaches / basil / tomatoes / etc (which were GREAT). This is Prius territory, and...
  16. footloose

    Config options: small-motor / front / 20" / existing battery

    Would appreciate advice of others with expertise in small motor builds. I’m considering a build using either a Q100 or Bafang SWXU. Would be front wheel drive, in an old Raleigh 20 folder (extensively modified, it rides very well, a favorite bike). Don’t need brute strength or rocket speed in...
  17. footloose

    Test ride: MAC 10T / 48V setup

    This spring I built a second electric bike, designed mostly to deal with the fairly extreme hills where I live. Design is not cutting edge at all – the bike isn’t powered with recycled phaser cannon batteries or anything like that. Instead I studied ES until I had a pretty good idea about a...
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