Search found 3045 matches

by veloman
Mar 24 2010 12:41am
Forum: EBike Technical
Topic: Eliminating the blue spark upon connecting wires
Replies: 16
Views: 1678

Eliminating the blue spark upon connecting wires

Will an on/off toggle switch on the battery loop eliminate that blue spark that I keep getting whenever I complete the circuit? It happens at either the batter connection, motor, or charger plug. Scares the crap out of me each time :shock: I have a homemade SLA battery setup btw. I think a toggle sw...
by veloman
Mar 23 2010 11:33am
Forum: EBike Build Threads
Topic: GT i-drive 2.0 Build
Replies: 3002
Views: 392695

Re: GT i-drive 2.0 Build

Most motorcycle cops would have a hard time keeping up with you at 40mph on a bike trail because their bikes are normally heavy and difficult to handle... (not including their large selves)... -Mike I highly doubt any cop would chase you rebel ebikers at 40mph on a pedestrian/bike trail for more th...
by veloman
Mar 23 2010 11:30am
Forum: EBike Build Threads
Topic: GT i-drive 2.0 Build
Replies: 3002
Views: 392695

Re: GT i-drive 2.0 Build

Why would you take your ebike and go 25-40mph on a bike trail, which also has pedestrians? 20mph is about the limit, IMO, for such trails. When I take my road bike (pedal-power) and I'm wearing my lycra, I also slow down to below 20 if I'm passing people, and if there are little kids I go wicked slo...
by veloman
Mar 23 2010 12:55am
Forum: EBike Build Threads
Topic: Giant ATX 450watt - budget build
Replies: 8
Views: 3786

Giant ATX 450watt - budget build

(go to 2nd post for first test run and pics) This is my second ebike build. My first used a 24v system and 600w Currie scooter motor mounted near the back wheel, driving the left side spokes on a single speed road bike. I'll attach a picture of that as well. Lesson's learned on first build: 1) Motor...
by veloman
Mar 20 2010 1:55pm
Forum: EBike Build Threads
Topic: Mongoose and cheap brushed Currie motor setup
Replies: 22
Views: 7394

Re: Mongoose and cheap brushed Currie motor setup

Your idea is very similar to what I'm building right now. I did go with the 1018 motor, the 36v 450watt geared one. Running it with no load in my room - was unbearable, the noise, like nails on a chalkboard. TNC scooters said it won't be as bad with load on it. And so that is my only concern with th...
by veloman
Mar 18 2010 12:29am
Forum: EBike Technical
Topic: Basic battery build idea?
Replies: 13
Views: 1529

Re: Basic battery build idea?

36 x 12 = 432 watt hours 24 x 17 - 408 watt hours So yup. They are about 6" long, and 3.9" wide and tall. I am making some final adjustments to the motor mount and fixing this crappy bike I'm using, hopefully tomorrow i can do some 1-2 mile laps around here to get an idea of range before i...
by veloman
Mar 16 2010 3:46pm
Forum: EBike Technical
Topic: Basic battery build idea?
Replies: 13
Views: 1529

Re: Basic battery build idea?

The ebay ad mentioned use for ebikes, ev's, scooters, and so on. I'm using a small 450watt motor, so I shouldn't have any problem. I'm interested to see the range though. But yeh, they seem TOO light. They are clearly marked 12v 12ah each.
by veloman
Mar 15 2010 5:56pm
Forum: EBike Technical
Topic: Basic battery build idea?
Replies: 13
Views: 1529

Re: Basic battery build idea?

I just got my 3 12v 12ah SLA batteries. Total weight for all 3 is 21.8lbs That's 432 watt hours. (I know I will probably only get 60% of that). But how is it possible that these 'marketed as' SLA 12v 12ah batteries weigh less than, and have more watt hours than my old 24v 17ah setup? That was 26lbs ...
by veloman
Mar 10 2010 9:58pm
Forum: EBike Technical
Topic: Basic battery build idea?
Replies: 13
Views: 1529

Re: Basic battery build idea?

Thanks for the replies. I actually have done a lot of searches on this site, over many topics (maybe not enough on dewalt batteries). I learned through google (bikeforums actually) that the dewalt 36v pack is 2.4ah. I've already put endless hours into researching my ebike build, and I'm getting to t...
by veloman
Mar 09 2010 7:42pm
Forum: EBike Technical
Topic: Basic battery build idea?
Replies: 13
Views: 1529

Basic battery build idea?

Can I effectively and safely do this? Buy 4 36v Bosch Fatpack Litheon battery packs, wire them in parallel to add up the amp hours (should be close to 9-10ah) at 36v. Keep them connected as one "battery" and use for powering my 36v motor, AND simply connect to a Bosch 36v charger when it c...
by veloman
Mar 02 2010 9:08pm
Forum: EBike Non-hub Motor Drives
Topic: What throttle for this controller?(RC)
Replies: 13
Views: 1282

Re: What throttle for this controller?(RC)

This may be getting to be too much for my interests. My whole idea was to keep it simple, and easy to put together. I think I'm playing in the wrong field here. My last ebike was so simple. I had a basic Currie 24v scooter motor, a matching controller, matching throttle and my basic SLA batteries. C...
by veloman
Mar 01 2010 6:00pm
Forum: EBike Non-hub Motor Drives
Topic: An Advanced Friction Drive System
Replies: 445
Views: 64486

Re: An Advanced Friction Drive System

That's an amazing design. Ever think of building and sell these units on here?
by veloman
Mar 01 2010 5:47pm
Forum: EBike Non-hub Motor Drives
Topic: Friction rim drive
Replies: 8
Views: 1225

Re: Friction rim drive

You guys read my mind. I had thought of this idea a few months ago and just started to piece my parts together.
by veloman
Mar 01 2010 5:39pm
Forum: EBike Non-hub Motor Drives
Topic: What throttle for this controller?(RC)
Replies: 13
Views: 1282

Re: What throttle for this controller?(RC)

My design takes into account the 10000rpm motor. There is no reduction unit or drivetrain. That controller is 25A, which is what is recommended for that motor. Maybe I'll go to a 40A to be safe. I only plan on drawing 100-200watts max. Is there a thread on this site that can better explain the throt...
by veloman
Mar 01 2010 5:15pm
Forum: EBike Non-hub Motor Drives
Topic: What throttle for this controller?(RC)
Replies: 13
Views: 1282

What throttle for this controller?(RC)

I have nearly all the parts in my cart at hobby king, but now I need to figure out what throttle to use in my system. I really just want something SIMPLE. My knowledge with electronics and RC stuff is pretty limited. I prefer a thumb throttle if possible. So what do I use with this controller? http:...
by veloman
Feb 21 2010 11:41pm
Forum: EBike General Discussion
Topic: The catch-22 of ebikes...
Replies: 24
Views: 2192

Re: The catch-22 of ebikes...

Coming from a road cyclist - riding any bike, or vehicle for that matter in hilly terrain is enormously more energy expensive. I can cruise at 20mph on flat roads (little or no wind) at about 200watts. If I start adding in 200ft climbs of 10-15% every mile, then it takes easily 3-4 times as much ene...
by veloman
Feb 19 2010 12:00pm
Forum: EBike Non-hub Motor Drives
Topic: RC motor with Shift Kit?
Replies: 9
Views: 1583

Re: RC motor with Shift Kit?

I just got the kit in today. It seems the biggest drawback is going to be weight - adding 7-8 lbs additional weight to the bike. I knew it was designed for those gas engines, but you guys have to understand, it's still very workable compared to what I have available. I don't have a machine shop, or ...
by veloman
Feb 15 2010 12:27pm
Forum: EBike Non-hub Motor Drives
Topic: RC motor with Shift Kit?
Replies: 9
Views: 1583

RC motor with Shift Kit?

Has anyone tried mating an RC motor with Sick Bike Parts Shift Kit? Seems like a good way to gear down the motor, AND get the crank freewheel setup, AND have multiple gear choices. I know it will require some retrofitting and some extra mount work, but it seems like a great idea. Any expert opinions...
by veloman
Sep 16 2009 2:33am
Forum: EBike Non-hub Motor Drives
Topic: High power RC motor and drive unit production
Replies: 1181
Views: 143462

Re: High power RC motor and drive unit production

I'm not sure if you guys know this, but if you really wanted to see the exact wattage going into your wheel, you could look into a Powertap hub. The most basic model is pretty cheap at around $600 on ebay. (They are designed to monitor a cyclists power output). Just build up your super beefy wheel a...
by veloman
Sep 14 2009 1:17am
Forum: EBike Non-hub Motor Drives
Topic: LiPoly powered 18HP Twin Motor Brushless MONSTER build!
Replies: 325
Views: 61279

Re: LiPoly powered 18HP Twin Motor Brushless MONSTER build!

To the OP, this sounds like a sick bike you're building. :lol: Just be careful when you're ripping 100mph on it, since it's so light, the slightest inconsistencies of the road will reduce your grip and contact area on the pavement. I've done 70mph (drafting) down a less than perfect road on my road ...