Recent content by Tiberius

eddio, I'm surprised no-one has recommended a physiotherapist. I'd rate that as even better than a chiropractor and way above an osteopath. It is almost exactly 10 years ago that I put my lower back out. My GP said take aspirins and rest for 2 weeks, so I decided to exercise my health...

Hi Dan, Until the UK law is aligned, it would be an interesting debate as to whether the new EN EPAC standard applied here. I don't think its called up, either specifically or by default, but I imagine courts would take note of it if there were no other guidance. I'm interested in these...

In one way I'm disappointed that there isn't going to be racing, but I can understand the reasons. I think it has got to the stage where racing would require a significantly increased level of organisation, with scrutineering, grid positions, race director. Maybe even a safety officer. And I...

Hi Nick, Throwaway comment or not, you may have hit the nail on the head. I always say the best jokes work because they have an element of truth in them. Like John, I have no interest in winding anyone up. But I am concerned by some goings-on on a forum that I like, that has been very...

I don't think you were being upbraided. John just pointed out a mistake. And this is a thread with technical content. Its not fair to then shift the ground and argue that we're in a place where technical accuracy is neither helpful nor wanted. I agree there are threads on here where technical...

Well, it would help someone who was trying to get their head around the way electric motors work. On the other hand, in what way did it harm anyone? Wouldn't it have been better to just say "Good point, what I meant to say was......"? Nick

Gentlemen, please. What is going on here? I go out for a day and come back to this. I was beginning to wonder if the start of the thread was a wind up, but there's no excuse for this. John is right; flecc is wrong. That should be the end of it. John pointed out a minor inaccuracy in one of...

Not necessarily. You need to understand that there is more than one way the top speed can be limited. One way is to match the Kv of the motor to the battery voltage, so that it naturally reaches a speed of just over 15 mph with no load. On the flat it will then do 15 mph, and as the slope...

Lemmy, I think your inches are a factor of 3.14 too high. AFAIUI, the convention is the diameter of the equivalent penny-farthing wheel rather than the circumference. Your bottom gear is very low. I guess that's a triple chainring with a bottle top for the inner ring. Nick

Some of that may be bragging. Or it may be the difference between a peak velocity downhill and a sustainable speed on the level. The US rules are generally 750 W and 20 mph compared to our 250 W and 15 mph. 70 kph, however, not that difficult. I have done it on an electric bike. I even did...

OK, What does the battery voltage do afterwards? Does it recover when the controller is disconnected? Possible causes: A short or something else wrong in the controller and the battery protection circuit tripping. High impedance or a poor connection in the battery or battery leads. It...

Can you keep the voltmeter connected to monitor the battery voltage as you do this? That would be a better indication of what's going on than the LEDs. Nick

Nice work, Cirrus. I wonder if there is a way of getting the battery weight right onto the trailer wheel, maybe by having two batteries mounted either side of the axle. That would help a bit with the traction. Another thought, and flecc may be able to help here. What is the legal position...

I just love this bit. I think we've posted on here before about it. But basically there is a 1984 Act and a 1988 Act which talk about speed limits and traffic regulations. One Act refers to motor vehicles and the other to vehicles. The upshot is that all vehicles have to obey stop signs, traffic...

You need to think about what speed you are planning on doing. The Crystalite 400 series are direct drive, and they don't start to get efficient until you are doing more than about 15 mph - obviously it depends on wheel size, but I'm assuming you're likely to be on 26". To do 15 mph+ off...