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  1. Tiberius

    Tiberius checking in

    Hello everyone, I haven't been on ES for a while. Sorry about that but I just got snowed under with projects. But even though I really did have too many projects on the go, along came one that I couldn't say no to. I was recruited onto one of the teams for this...
  2. Tiberius

    Bike rental in USA - more than a SUV?

    Hi Everyone, I just got a text message from my son. He's touring the USA with a friend and he says it cost more to hire two bicycles than one car. Maybe that's just his way of explaining why they are driving round in a 4WD SUV. Actually, I suppose it could be the same over here. Car hire (auto...
  3. Tiberius

    Jeremy Harris - news

    There have been a few threads recently asking about Jeremy. He was active on E-S and helped quite a few people as well as building lots of impressive stuff, and then he seemed to have disappeared around March. I had lunch with him yesterday and can report that he is alive and well and happy and...
  4. Tiberius

    Please ask questions on the forum instead of PMs

    Following discussion recently with a much respected member, I'd like to make a plea. This is mainly to newbies, but we could all take notice. If you have a question to ask, it is almost always better to ask it on one of the forums than to PM a specific person. 1. You will get a better chance...
  5. Tiberius

    British / European competitions?

    After the Death Race and the San Fransisco hill climb, it seem that the cousins have caught the e-bike competition bug. How many people in Britain or Europe would be interested in similar events? If there is enough interest we can get something organised. We need to show them how to do it with...
  6. Tiberius

    Finally going to US - Pennsylvania, Florida

    Hi everyone, Finally got my act together to go to the US, after all the drama about whether I would actually be admitted. I've got a couple of days near Coopersburg, PA next week before I go down to Lakeland, FL. Unfortunately I then have to fly back across the Atlantic and can't stay for the...
  7. Tiberius

    Rebel Electric Racer ?????

    This has been getting a lot of coverage in the UK aviation magazines recently http://rebelelectricracer.com/home Now, I'm very wary of saying things won't work when I haven't tried them myself, but I can't help feeling the reporters and editors are just publishing press releases without asking...
  8. Tiberius

    Segway law clear as mud...

    ...following clarification by Judge. I always thought the legal side of these was clear - you can't use them on the road in the UK. But read this report: http://www.bbc.co.uk/news/uk-england-south-yorkshire-12215326 US readers should note that here in England, "pavement" means "sidewalk". I...
  9. Tiberius

    Governments will tax electricity for vehicles

    My day job is electronics and particularly short range communications. I'm currently in a European capital city for a committee meeting and some interesting discussions came out over dinner last night. We're doing a lot of work in industry preparing for the Smart Grid. An intelligent power...
  10. Tiberius

    Unbelievable crap from US immigration

    I have been trying to renew my visa to visit the USA, and I am getting the most unimaginable nonsense. You have to understand that I am your average international desperado and scumbag. I used to live and work in Massachusetts; my daughter went to Chicago Uni; some of my clients are US...
  11. Tiberius

    Captain Beefheart 1941-2010

    Sad news that Don Vliet, aka Captain Beefheart, has just died. Even the normally staid BBC Radio 4 channel ran an obituary on its early morning news programme today. http://www.bbc.co.uk/news/world-us-canada-12024652 http://www.bbc.co.uk/news/entertainment-arts-11811289 There will be many more...
  12. Tiberius

    107mph....bike broke in half...nearly died

    A little article in the UK press about speeds achieved on (non-electric) bicycles. http://www.independent.co.uk/environment/green-living/simon-usborne-eric-barone-hit-107mph-on-the-slopes-of-cerro-negro-before-his-bike-broke-in-half-and-he-nearly-died-2124430.html Thanks to the UK CTC...
  13. Tiberius

    What news on the Rialto? Cycling in Venice

    Tiberius is working in northern Italy for a while. On Saturday a couple of us decided to try out the hotel bicycles and ride to Padova, some 15 km or so away. The exercise did not disprove my theory that almost every used bicycle in the world is in need of basic maintenance. Two things really...
  14. Tiberius

    Hydrogen fuel cell taxi

    for the London 2012 Olympics... http://www.bbc.co.uk/news/business-10836132 The BBC report is only 2 months behind the press releases.... http://www.grouplotus.com/engineering/home.html http://www.intelligent-energy.com/index_article.asp?SecID=8&secondlevel=25&artid=4115 Nick
  15. Tiberius

    What electronics do we need?

    I don't mean what are the minimum electronics needed to make an e-bike. What I mean is "what electronics device/box/gadget do we need to make EVs work better?" What are we missing? What should the development engineers be working on? Nick
  16. Tiberius

    E-Bike Racing: 2011 World Challenge

    OK Guys, I'm impressed with the things that have gone on with the Spooky Tooth Death Race and the Ohio race. It seems that e-bike racing may be catching on. And what better way to keep the momentum up than an international challenge. So here it is: I've been speaking to some airline pilot...
  17. Tiberius

    The exact meaning of Kv

    OK, some of you may already know the answer to these questions, in which case this post will tell you more about me than about motors. Kv is the rpm per Volt. I'm talking about Permanent Magnet Brushless DC motors, but the principle applies to other types. Ie, Kv tells you how fast the motor...
  18. Tiberius

    Airline chaos in Europe - Rethink?

    We are now in the 5th day of a complete shutdown of air travel in the UK and most of Europe because of the volcanic ash cloud. I was supposed to be on my way to Turkey today for a business meeting; I was going to meet up with Michaelplogue while out there too. At least I had some warning so I'm...
  19. Tiberius

    KERS System-LiPo, LiFePo or supercap

    I'm looking at a special application, that is probably best described as a mini KERS system (Kinetic Energy Recovery System as allegedly used in F1). It has to deliver a short intense burst of power and then spend a slightly longer time recharging. Assume the voltage is around 100 (that's not...
  20. Tiberius

    ESC vs Bike Controller

    Gentlemen, Your comments and advice is sought. I'm doing a project and I have a choice between RC style ESCs and E-bike type controllers. Initially I was entirely set on the bike type controllers on grounds of cost and the fact that they would take higher voltage. But now I'm not so sure; the...
  21. Tiberius

    How big are the caps on a controller?

    What value of capacitance is there typically on a controller? I'm trying to do some calculations on the inrush current and sparking when the controller is connected to the battery. Or for that matter, a similar package of electronics is connected to a similar power source. What's the worst...
  22. Tiberius

    A question about Kv

    Kv - rpm per Volt - is one of the important parameters for a motor (or an alternator). But a PMBLDC motor is a 3 phase device; run it as a generator and you get 3 sine waves at 120 degree spacing. So is Kv based on the rms or the peak or the average Voltage? Is it based on assuming a true 3...
  23. Tiberius

    RC motors & Non-RC controllers - Commutation Rate

    I remember that we once had a problem with a controller not being able to keep up with the commutation rate of a geared hub motor. IIRC it ran into trouble at about 300 or 400 Hz, and one of the solutions was to up the clock rate on the processor in the controller. People have reported using...
  24. Tiberius

    Turnigy HXT 80-100 Motor - data, real world results?

    The HXT 80-100 motor seems to be one of the highest powered ones, and not too pricey. Eg: http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=5142 I think a few people on here (Greyborg, KiM, Luke, Dan...) have worked with them. How are you getting on? Does anyone have a link to...
  25. Tiberius

    Nine Continent Rear Wheel Dishing

    I've been reading comments about the problems of getting the dishing right on the 9C rear motors. AFAIUI, the basic problem is that the geometry puts the rim too far to the left once you have a gear cluster on the axle. The right hand spoke holes on the hub are too far to the left. I've also...
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