Search found 169 matches

by mi7d1
Nov 04 2008 1:31am
Forum: E-Bike General Discussion
Topic: Extreme efficiency?
Replies: 54
Views: 4368

Re: Extreme efficiency?

"My question is how much can some very basic aerodynamic structures improve efficiency at say 30mph with zero wind? ... Anyone have a ballpark estimate of how much efficiency can be gained for a 30mph speed with minimal fairing structure? Could it be as much as 20-30% benefit." <snip> Overall, aero...
by mi7d1
Nov 03 2008 9:34am
Forum: E-Bike General Discussion
Topic: Extreme efficiency?
Replies: 54
Views: 4368

Re: Extreme efficiency?

I did pedal during the race. How much I can't say but I don't have the strength nor stamina to compete otherwise, I'm by no means an athlete. The results I posted were not normal. Using the velo for commuting I get around 18Wh/mi in city ridding. It was fun to see how much impact stop and go ridding...
by mi7d1
Nov 03 2008 8:44am
Forum: E-Bike General Discussion
Topic: Extreme efficiency?
Replies: 54
Views: 4368

Re: Extreme efficiency?

Fascinating, Bill. How much does your battery weigh? I'd love to see you repeat that with some Lithium on board. I'd lay money on there being a big improvement in Wh/mile. 77 lbs (35 kg) velomobile 48 lbs (22 kg) batteries 15 lbs (7 kg) Crystalyte 406 motor 220 lbs (100 kg) my weight 360 lbs (163 k...
by mi7d1
Nov 02 2008 8:11pm
Forum: E-Bike General Discussion
Topic: Extreme efficiency?
Replies: 54
Views: 4368

Re: Extreme efficiency?

I am not trying to set any records. I am curious more than anything. I would love, however, to push my own efficiency as far as I possibly can. For me, the best efficiency I have ever achieved without any pedalling what-so-ever, is 13.4WH per mile at 18 miles per hour. I have heard numbers from guy...
by mi7d1
Jul 14 2008 6:38pm
Forum: E-Bike General Discussion
Topic: kbarrett's ebike
Replies: 8
Views: 960

Re: kbarrett's ebike

I used a c'lyte 406 at the e-bike races running 48v 18Ah AGM pack. IIRC it would run around 27mph on it's own with no pedaling. I'm not sure of the range without pedaling. I use the velo for commuting a distance of 25mph. Remember this is using lead batteries and not lithium's. Are you aware of the ...
by mi7d1
Jul 11 2008 8:25pm
Forum: E-Bike General Discussion
Topic: Strangest Ebay Auction
Replies: 34
Views: 3085

Re: Strangest Ebay Auction

Yes, all four of my bike are posted, some more than others. It's my velomobile that brings me to E-S forums. That's the one that has e-assist on it. I use it for commuting to work. I'm getting ready to add e-assist to my Cruzbike next. I purchased a c'lyte 405 that needs repairs. As soon as that's t...
by mi7d1
Jul 11 2008 12:06pm
Forum: E-Bike General Discussion
Topic: Strangest Ebay Auction
Replies: 34
Views: 3085

Re: Strangest Ebay Auction

I must admit that I hadn't read Justin's article, till now. I still stand by the yard stick that I'm using in my statement. That includes total energy in vs out. As Justin wrote: Only the consumables of both transportation modes will be considered in the comparison. Electric bikes have the same comp...
by mi7d1
Jul 10 2008 5:10pm
Forum: E-Bike General Discussion
Topic: Strangest Ebay Auction
Replies: 34
Views: 3085

Re: Strangest Ebay Auction

So are you trying to tell me that you don't eat when you use your ebike? :D It would take an awful lot of data to convince me that an ebike and it's user has a smaller carbon foot print to own and operate than a pedal bike and it's user. After all aren't you referring to the carbon foot print when y...
by mi7d1
Jul 09 2008 5:36pm
Forum: E-Bike Technical
Topic: how many 4 series crystalyte motors are there?
Replies: 8
Views: 985

Re: how many 4 series crystalyte motors are there?

I just shop elsewhere where I'm not confused. If you go to the electricrider.com parts page you'll see the naming matrix below the images and can translate roadrunner=408 etc. etc. Having said that.. yeah.. that's just dumb marketing with such a tiny demographic. If it walks like a duck and talks l...
by mi7d1
Jul 09 2008 4:17pm
Forum: E-Bike General Discussion
Topic: Strangest Ebay Auction
Replies: 34
Views: 3085

Re: Strangest Ebay Auction

andys wrote:At some point, people need to tell their states to kiss their a** If they won't allow the most efficient means of transportation that exist in their stupid state.
A pedal bike is much more efficient than an ebike. No need for flaming me :lol: , I do understand the point that you're making.
by mi7d1
Jul 09 2008 4:11pm
Forum: E-Bike General Discussion
Topic: One sided hubs
Replies: 11
Views: 1380

Re: One sided hubs

For your trike build you might want to look on over at the bentrideronline forums. There is both a trike and a homebuilders sub forum. Lot of friendly folks there.
by mi7d1
Jul 09 2008 3:36pm
Forum: E-Bike Technical
Topic: how many 4 series crystalyte motors are there?
Replies: 8
Views: 985

Re: how many 4 series crystalyte motors are there?

electricrider.com confuse me with their renaming of the motors. It appears to me that they are trying to separate themselves from the group. I don't know what a sparrow, or roadrunner is. I do know the difference between a 405 and a 406. I just shop elsewhere where I'm not confused. http://www.ebike...
by mi7d1
Jul 09 2008 2:46pm
Forum: E-Vehicles General Discussion
Topic: What can a Crystalite Motor Take ?
Replies: 7
Views: 1092

Re: What can a Crystalite Motor Take ?

<snip> but the main complaintt seems to be that the glue holding the magnets melts and the magnets spin in the rim instead of driveing forwards! Amazing service from a motor so small! This sounds like what happened to me. I spun the magnets. It makes a rather "unique" growling sound :D I also broke...
by mi7d1
Jul 08 2008 11:58pm
Forum: E-Bike General Discussion
Topic: kbarrett's ebike
Replies: 8
Views: 960

Re: kbarrett's ebike

kbarrett had a 405 rear hub motor last he told me. This was back in May.
by mi7d1
Jun 25 2008 5:41pm
Forum: E-Bike Technical
Topic: Crystalyte trouble shooting help requested
Replies: 45
Views: 2662

Re: Crystalyte trouble shooting help requested

I never put two and two together. Makes sense now about the ring of magnets spinning. Here I was thinking that they were just vibrating and causing the growling. :D Well I'm dead in the water till I can either work with the two cracked magnets or relace the wheel to the other hub. Thanks for pointin...
by mi7d1
Jun 25 2008 2:19pm
Forum: E-Bike Technical
Topic: Crystalyte trouble shooting help requested
Replies: 45
Views: 2662

Re: Crystalyte trouble shooting help requested

go for it you don't have much else to lose :lol: what else could possibly go wrong? maybe there are magnets available that are the same size. That's one idea and I had thought of it also. What stopped and cause me to ask first is that as it is now I still have a good hub that could be used if I wer...
by mi7d1
Jun 25 2008 1:39pm
Forum: E-Bike Technical
Topic: Crystalyte trouble shooting help requested
Replies: 45
Views: 2662

Re: Crystalyte trouble shooting help requested

How screwed am I now? There were no broken magnets... till I was picking up a pair to clean and they got away from me, hit each other and now I have two that are broken. :( Can these just be bonded in their respective place since the magnetic field poles are on the inside and outside radius and not ...
by mi7d1
Jun 25 2008 1:11pm
Forum: E-Bike Technical
Topic: Crystalyte trouble shooting help requested
Replies: 45
Views: 2662

Re: Crystalyte trouble shooting help requested

Hi Looks like the magnets have moved, I have seen a whole rotor full do this!! The whole ring of magnet are loose are not bonded. None are broken. I'm able to slide them up the rotor easily to remove them. I've purchased some epoxy that has a temp rating of -60°F-300°F After removing the stator, ...
by mi7d1
Jun 23 2008 6:40pm
Forum: E-Bike Technical
Topic: Crystalyte trouble shooting help requested
Replies: 45
Views: 2662

Re: Crystalyte trouble shooting help requested

Here's a good one for you, I was running a search for +epoxy +magnets and I came across your post. Looked at it for a moment and said to myself that was my thread. I hadn't received notice yet about a thread update. Hi <snip> Looks like the magnets have moved, I have seen a whole rotor full do this!...
by mi7d1
Jun 23 2008 5:50pm
Forum: E-Bike Technical
Topic: Crystalyte trouble shooting help requested
Replies: 45
Views: 2662

Re: Crystalyte trouble shooting help requested

I'll have to look into and research about the different types of epoxy. I have no doubt the motor has gotten hot. A few days prior to this problem my on/off switch broke while away from home. I took off the tail fairing and the motor was very warm to hot to the touch. I ask a lot from my velomobile ...
by mi7d1
Jun 23 2008 5:38pm
Forum: E-Bike Technical
Topic: Crystalyte trouble shooting help requested
Replies: 45
Views: 2662

Re: Crystalyte trouble shooting help requested

I guess this is good news then since the source of the noise has been found. As I understand now since the magnets were vibrating at stall speed this would prohibit the overload from kicking in and shutting down the power to the phase wires. I'm on vacation again in a week and a half. This will give...
by mi7d1
Jun 23 2008 3:47pm
Forum: E-Bike Technical
Topic: Crystalyte trouble shooting help requested
Replies: 45
Views: 2662

Re: Crystalyte trouble shooting help requested

Oh No, Mr. Bill is out of the frying pan and into the fire. I was attempting a stator swap. I've removed the stators twice now in the past with no problem. As before I was turning the nut on the gear puller by hand. The stator was coming out, but I couldn't pull it free. Flipped the wheel over to ge...
by mi7d1
Jun 23 2008 2:51pm
Forum: E-Bike Technical
Topic: Crystalyte trouble shooting help requested
Replies: 45
Views: 2662

Re: Crystalyte trouble shooting help requested

I think it was mostly me that was the cause. I sort of recall a gap being there and I didn't put any washers on. It's like trying to recall a dream. When I put the motor back on it was a day before the race. I probably wasn't pay attention. The wheel was difficult to install due to the axle diameter...
by mi7d1
Jun 23 2008 2:48pm
Forum: E-Bike Technical
Topic: Crystalyte trouble shooting help requested
Replies: 45
Views: 2662

Re: Crystalyte trouble shooting help requested

The threads on the axle were ripped off. The axle has two flat on it to allow it to slot into the dropout. This weakens the threads. Also they are cut and not rolled again weaker. Add me and my ham fisted installation and you see the results. The axle never spun and the other side is holding like it...
by mi7d1
Jun 22 2008 6:42pm
Forum: E-Bike Technical
Topic: Crystalyte trouble shooting help requested
Replies: 45
Views: 2662

Re: Crystalyte trouble shooting help requested

Well I took of the tail fairing and what I found wasn't pretty. I have one broken spoke and the axle is stripped. There is what I consider a major gap between the dropout and where the motor attaches. A larger photo can be seen here: http://flickr.com/photos/wmbates/2602462008/sizes/l/ Besides repla...