Search found 169 matches

by mi7d1
Aug 02 2007 7:03pm
Forum: E-Bike Technical
Topic: Mysterious power loss/motor bearing update
Replies: 9
Views: 1514

If they are isolated, then only one terminal of the 24v charger connects to one terminal of the 12v charger. I'm not totally clear on this answer. The situation prima facie "sounded" to me like a short circuit. Hopefully someone else smarter about these things can chime in. Well it looks like my we...
by mi7d1
Aug 02 2007 2:55pm
Forum: E-Bike Technical
Topic: Mysterious power loss/motor bearing update
Replies: 9
Views: 1514

...use the 12v charger to occasionally rebalance each of your SLAs (just don't do it while simultaneously charging with the 36v charger, http://endless-sphere.com/forums/files/img_2396_137.jpg Ok, time for a scary/stupid question, first preceded by my admission to having done that only once in an "...
by mi7d1
Jul 29 2007 2:15pm
Forum: E-Bike Technical
Topic: Using Reverse as an Electric Brake?
Replies: 30
Views: 4777

Very interresting read. Most is beyond my understanding and ability at this time. I think that my velomobile maybe vulnerable to high back emf due to its extreme aerodynamics. I have a 5% downhill grade for about a half a mile that I can coast from a standing start and be doing 40mph at the bottom w...
by mi7d1
Jul 28 2007 1:59pm
Forum: E-Bike Technical
Topic: bob mcree is back online!
Replies: 7
Views: 1356

A big hello from Portland, ORYgun and welcome back. :D
by mi7d1
Jul 24 2007 2:33am
Forum: E-Bike General Discussion
Topic: Fully eclosed E-Bike
Replies: 12
Views: 2254

My WAW was 35kg to start and then I added about 77lbs of motor and lead batteries for a rolling weight of 144 lbs Now it isn't much lighter than the AeroRider without batteries. My bike needs to go on a diet. I need to get rid of that lead and get some lighter batteries. Or you could spend hundreds...
by mi7d1
Jul 23 2007 2:46am
Forum: E-Bike Technical
Topic: Free Wheeling or Not in ebike?
Replies: 23
Views: 3268

A gal in Portland recently got a ticket for no brakes and was fighting the ticket by trying to prove she could stop quicker with leg power then with brakes. I'll remember that, since I ride around Portland. :) Do you know why she was stopped? Did she convince the judge? I don't want to hijack the t...
by mi7d1
Jul 22 2007 12:27pm
Forum: E-Bike Technical
Topic: Using Reverse as an Electric Brake?
Replies: 30
Views: 4777

Hi mi7d1. On an earlier project I added a power trailer to a cheap mtb with poor brakes. Since I live on a steep hill, I had to creep down at about 5MPH, using the brakes all the way, to avoid any disaster. So I came up with a version of regenerative braking that has worked out pretty good, and I s...
by mi7d1
Jul 22 2007 11:01am
Forum: E-Bike Technical
Topic: Using Reverse as an Electric Brake?
Replies: 30
Views: 4777

Thanks guys, I hadn't thought about heat. I was only thinking about the electrical side of the idea. As far as "pulse the reverse switch t at high frequency" is not only beyond my abilities at the moment, but I can barely grasp the idea. I'm glad I only tried my experiment at the speed of walking. O...
by mi7d1
Jul 22 2007 4:10am
Forum: E-Bike Technical
Topic: Using Reverse as an Electric Brake?
Replies: 30
Views: 4777

Using Reverse as an Electric Brake?

I have a 20a 36-72v clyte controller with a reverse switch. After reading several times about the hub motors having a higher rolling resistance rolling backwards with the controller turned on, I decided to try a little experiment while rolling into my parking spot at work. I flipped the switch into ...
by mi7d1
Jul 18 2007 4:47pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Electric assist Velomobile
Replies: 20
Views: 4905

Have you thought about how you want to charge the DeWalts? I had originally planed to have one charger per battery pack connected at all times and tap off below the BMS as you mentioned before then have all chargers plugged into a multi outlet and have one extension cable to power all the chargers ...
by mi7d1
Jul 18 2007 4:07pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Electric assist Velomobile
Replies: 20
Views: 4905

that bike looks like it is going fast at a standstill. I am already thinking of paint schemes. The reduced friction, from aerodynamics played a huge part in your extended range, also reducing the wieght would help as well. You pointed out that going down a bike path got the speed up to the 40+ mph ...
by mi7d1
Jul 18 2007 3:22pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Electric assist Velomobile
Replies: 20
Views: 4905

48 volts worth of the Dewalt powertool batteries you're interested in, and a 35 or 40 amp controller, would really lighten the load, more than double your Mt. Tabor hill-climbing power, and almost double your top assist speed. Since the dewalt packs are 33 volts, that would take some intra-pack mod...
by mi7d1
Jul 18 2007 1:55pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Electric assist Velomobile
Replies: 20
Views: 4905

I want one, cant imagine what the gf would say though, I am surprised it doesnt go faster, all that wieght might be a factor. I predict 40 mph in your very near future. I think that the weight has a lot to do with it however the voltage I'm running is also a factor in the speed. One thing I know is...
by mi7d1
Jul 18 2007 5:54am
Forum: E-Bike General Discussion
Topic: Fully eclosed E-Bike
Replies: 12
Views: 2254

In my previous live as a peddle only velomobilist I thought the AeroRider at more than 60kg to be an over weight bike and unable to be powered by peddles only. Now that I've electrified my WAW I wonder about the AeroRider. My WAW was 35kg to start and then I added about 77lbs of motor and lead batte...
by mi7d1
Jul 18 2007 5:31am
Forum: E-Bike Build Threads / Photos & Video
Topic: Electric assist Velomobile
Replies: 20
Views: 4905

Bill, welcome to the forum. Like xyster, I would expect to get stopped occasionally, since it looks so much like a car, (with no tags), instead of a bike (trike). How fast does it go on the level? I am sure you will get lots of help selecting new batteries from all the experts here. The WAW along w...
by mi7d1
Jul 17 2007 10:53pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Electric assist Velomobile
Replies: 20
Views: 4905

My favorite velomobile drool, drool. If you can loose all of the lead it would be a big help. How do you find the drag of the c\lyte when unpowered? How are you finding the velomobile over all? IMHO the WAW is the most sexy velomobile being manufactured. It looks fast sitting still. Believe me the ...
by mi7d1
Jul 17 2007 10:36pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Electric assist Velomobile
Replies: 20
Views: 4905

Hey, that's great -- the first e-velomobile rider I've met around here. How's riding in the PDX weather? Can you make it up the West Hills if you wanted to (to OHSU, etc)? Any problems with Portland police, or Multnomah/Clackamas/Washington Counties or Oregon State police? I bought the velomobile s...
by mi7d1
Jul 17 2007 7:27pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Electric assist Velomobile
Replies: 20
Views: 4905

I did manage to see the bike by copy / pasting the link. Looks good. You might want to move this thread to the "Photos and Videos" area though. Webmaster! Sorry, please forgive a 1 µW newbie. I was trying to decide where to post because I did have some questions to ask about the DeWalt batter...
by mi7d1
Jul 17 2007 4:32pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Electric assist Velomobile
Replies: 20
Views: 4905

Electric assist Velomobile

I have a WAW velomobile that has a 20a 36-72v controller and a clyte 406-411 mounted in a 26" rear wheel motor with 48v of 18Ah lead acid and one additional 18Ah battery to run the lighting system. My lighting system is composed of four led running/turn signals and a tail/brake light combo, two 35w ...