Search found 961 matches

by Malcolm
Jan 20, 2012 4:44 am
Forum: General Discussion
Topic: I found it! The Hat Song!
Replies: 2
Views: 330

Re: I found it! The Hat Song!

Thanks for that DJ, that really got me giggling :D The Swedish "translation" is brilliant: "glue a piece of ham, cool-ish" ???


http://en.wikipedia.org/wiki/Hatten_ar_din
by Malcolm
Jan 18, 2012 4:05 am
Forum: E-Scooter and Motorcycle General Discussion
Topic: jonescg's NEW electric racebike BUILD thread!
Replies: 1248
Views: 154801

Re: jonescg's NEW electric racebike pre-build thread!

We have used that nylon rod for many years to prevent electrolysis on fishing gear, mounting 200 lb pullers with them. The gear never comes loose. That's good to hear. I'm not trying to knock this method Gordo, I think it's very neat. Just pointing out that thermoplastics like nylon do creep with t...
by Malcolm
Jan 17, 2012 2:42 pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: jonescg's NEW electric racebike BUILD thread!
Replies: 1248
Views: 154801

Re: jonescg's NEW electric racebike pre-build thread!

I nearly posted that video myself, but if I've understood right it means that all the clamping force has to come from a pair of threaded plastic rods. Plastics tend to creep under load, so the clamping force will gradually decrease with time. One possibility would be to use steel threaded rod with a...
by Malcolm
Aug 26, 2011 7:55 am
Forum: Battery Technology
Topic: 100a PSI fuse
Replies: 7
Views: 572

Re: 100a PSI fuse

oatnet wrote:Each 'supercell' is (5) headway paralleled with copper strap on each end.
So one question keeps nagging me: how do you protect against one of the cells in such a 'supercell' shorting out internally? Or does that never happen?
by Malcolm
Aug 11, 2011 12:25 pm
Forum: Large EV General Discussion
Topic: Golf Cart
Replies: 50
Views: 6415

Re: Golf Cart

Most big series motors are fine running at 12V. Brush friction is enough to prevent them from overspeeding, but like TD said you don't want to use higher voltage. The series motors I'm using in my mini will run happily run at 12V all day without any load. It's hard to tell from the photo, but that l...
by Malcolm
Aug 10, 2011 9:30 am
Forum: General Discussion
Topic: Re: London And England Rioting
Replies: 42
Views: 3144

Re: London And England Rioting

It crossed my mind that social networking media could also be used by decent people to gather and face down these thugs en masse. I think this has started to happen already. I remember seeing a report about a group of 100 that had gathered to protect their area. http://www.bbc.co.uk/news/uk-england...
by Malcolm
Aug 09, 2011 4:00 pm
Forum: General Discussion
Topic: Re: London And England Rioting
Replies: 42
Views: 3144

Re: London And England Rioting

Talking with friends about the rioting, someone mentioned that one of the brighter notes is local people using Twitter to get together and help clear up the mess afterwards. The police seem to be taking a softly, softly approach, trying to avoid further provocation or excuse for further rioting. It ...
by Malcolm
Aug 05, 2011 11:09 am
Forum: Large EV General Discussion
Topic: Austin Mini
Replies: 9
Views: 1537

Re: Austin Mini

Hi Paul Thanks for the offer, but I recently got hold of a 80V/600A forklift controller that will do for initial testing. I know someone local who may be interested in the Curtis controller though. I'll pass the information on. I gave up on the idea of building a small trike for the same reason a wh...
by Malcolm
Jul 13, 2011 9:43 am
Forum: Battery Technology
Topic: Convert your 48V charger into 100V for 24s for CHEAP !
Replies: 42
Views: 6001

Re: Convert your 48V charger into 100V for 24s for CHEAP !

Doc, I wonder if you could give me a little newbie advice about choosing a suitable blocking diode for DC converters? I'm building a charging system using 48V to 3.6V DC/DC converters for a LiFe pack. The converters are rated at 20A output. Do I just need a diode rated at better than 3.6V/20A? It lo...
by Malcolm
Jul 13, 2011 5:42 am
Forum: Battery Technology
Topic: HP 3kW PSU - charging solution
Replies: 62
Views: 4731

Re: HP 3kW PSU - charging solution

Nuts&Volts wrote: I am having a ton of trouble trying to use the DC/DC converter idea of Docs.
I'm starting to put together the same sort of system. What sort of problems are you having?
by Malcolm
Jul 11, 2011 9:49 am
Forum: Battery Technology
Topic: Terminating the 15Ah and 20Ah Cell-Man cells
Replies: 281
Views: 34291

Re: Terminating the 15Ah and 20Ah Cell-Man cells

The countersunk nuts would work just as well and be cheaper/easier to install, but if I was building the pack I'm sure one of them would fall right into the middle of the pack just as I was finishing it. You could minimise that risk by making the nuts a push-fit into the recesses though. Just lookin...
by Malcolm
Jul 11, 2011 9:22 am
Forum: Battery Technology
Topic: Terminating the 15Ah and 20Ah Cell-Man cells
Replies: 281
Views: 34291

Re: Terminating the 15Ah and 20Ah Cell-Man cells

I was looking at Ripperton's pack yesterday, trying to work out how those tabs were joined http://www.diyelectriccar.com/forums/showthread.php/ripperton-electric-track-bike-41173p35.html It looks as if those screws go through the tabs straight into the acetal block. I'm sure it would take a thread e...
by Malcolm
Jul 10, 2011 3:46 am
Forum: E-Bike Non-hub Motor Drives
Topic: Hub motor BB drive
Replies: 27
Views: 6683

Re: Hub motor BB drive

No updates, sorry, I've been busy with another project. The drive is proving very reliable so far. What would you like to see in a video?
by Malcolm
Jul 09, 2011 2:17 am
Forum: Large EV General Discussion
Topic: Honda Accord build - starting now
Replies: 52
Views: 5414

Re: Honda Accord build - starting now

I know McDesign's original truck plans were for lead acid, but according to the first post here this one will be lithium. I added 300 lbs to the stock weight to round it up to 3000. I doubt you could get enough lead in the Honda to get the desired range without needing serious upgrades to brakes, su...
by Malcolm
Jul 08, 2011 6:17 pm
Forum: Large EV General Discussion
Topic: Honda Accord build - starting now
Replies: 52
Views: 5414

Re: Honda Accord build - starting now

If you plug the numbers for your car into the Ecomodder calculator: http://ecomodder.com/forum/tool-aero-rolling-resistance.php it'll give a pretty good idea of energy use. Taking a CdA of 0.65 and a weight of 3000 lbs it gives a power requirement of around 15 kW at 70 mph, so taking into account el...
by Malcolm
Jul 08, 2011 4:04 am
Forum: Large EV General Discussion
Topic: Honda Accord build - starting now
Replies: 52
Views: 5414

Re: Honda Accord build - starting now

That Motenergy motor has a tail shaft, so the cheap way to provide AC, vacuum and 12V would be to drive the original pumps and alternator using a belt pulley on the tail shaft. If you don't like that approach you could run a Meanwell 12V power supply straight off your traction pack and use it to dri...
by Malcolm
Jul 07, 2011 11:41 am
Forum: Large EV General Discussion
Topic: Austin Mini
Replies: 9
Views: 1537

Re: Austin Mini

I don't know about liposuction, but I could definitely use a lipo infusion. I've just started working on this after a long break. Just dropped the original engine and subframe and I've got a few mates coming round to help me lift the shell off and roll her back. She'll get a good scrub down and then...
by Malcolm
Jul 07, 2011 7:56 am
Forum: E-vents
Topic: TTXGP Australia July 1st - 3rd
Replies: 57
Views: 5470

Re: TTXGP Australia July 1st - 3rd

I've been watching Daniel's build from the start over on DIY Electric Car. He just keeps ploughing on regardless of setbacks, and that seems to be the common factor to everyone involved in the racing scene. I really like the pioneer spirit that comes over in your video. I think this is a period that...
by Malcolm
Jul 07, 2011 5:22 am
Forum: E-vents
Topic: TTXGP Australia July 1st - 3rd
Replies: 57
Views: 5470

Re: TTXGP Australia July 1st - 3rd

Hey Andy!

Just wanted to say what a cracking job you did on the video. It was the next best thing to being there :)
by Malcolm
Jul 04, 2011 4:45 am
Forum: E-vents
Topic: TTXGP Australia July 1st - 3rd
Replies: 57
Views: 5470

Re: TTXGP Australia July 1st - 3rd

Glad to hear your bike showed so much promise Chris, but sorry to hear about the motor problems, especially as I was one of the people who suggested running paralleled motors at the start of your build :oops: It makes sense that any differences in motor resistance will diverge under heavy load, but ...
by Malcolm
Jul 02, 2011 6:24 pm
Forum: E-Bike Photos & Video
Topic: Custom elektric bike build
Replies: 46
Views: 9113

Re: Custom elektric bike build

Very nice work Linukas! I've just been talking about building a stainless frame with another member, so it's great to see this. Do you know how much the bare frame weighs? A concentric swingarm pivot and bottom bracket is also on my wish list. I'm curious about your design. I can't see any bearing i...
by Malcolm
Jul 02, 2011 6:08 pm
Forum: E-Bike Non-hub Motor Drives
Topic: D's RC Drive Kona DC1
Replies: 1170
Views: 85574

Re: D's RC Drive Kona DC1

Sounds like you had a great day chaps. It's good to see the photos and put faces to names. But where's the pic with Miss Moneypenny? :)

The Prilly looks great in black, but I thought she was sold long ago?
by Malcolm
Jun 30, 2011 11:15 am
Forum: Items for Sale - New
Topic: ebike frame
Replies: 559
Views: 29955

Re: The worlds best E-bike frame,taking deposits!!!

in the meantime dont be afraid to place deposits All my alarm bells just went off at once. The only way to reset them would be to see a real-life frame :P Edit: Maxwell, I realise you've earned a good reputation here for selling motors at reasonable prices. It's just that phrases like that get me w...
by Malcolm
Jun 29, 2011 4:39 pm
Forum: General Discussion
Topic: eBike Photo Caption Contest
Replies: 9
Views: 589

Re: eBike Photo Caption Contest

'You're gonna need better camouflage than that when I get out of this wheelchair!'
by Malcolm
Jun 29, 2011 2:42 pm
Forum: Battery Technology
Topic: HP 3kW PSU - charging solution
Replies: 62
Views: 4731

Re: HP 3kW PSU - charging solution

Just a note of caution, the PSU in the data sheet looks identical to the photos I've found of the model you have, but the pin arrangement for the small connectors may be different. I'd suggest using a 5k resistor rather than a jumper to test the enable connections first.