Search found 1709 matches

by woody
Tue, 02 Jul 2013, 19:51
Forum: EV Racing
Topic: Electric Karts
Replies: 19
Views: 2465

Electric Karts

There is a track in Auckland (Formula E) which has electric karts only.

They are quiet, fast, not smoky or stinky. Made in Italy, ~NZ$18K each. 4 optima yellow tops are in the pods and charged at ~100Amps.
by woody
Mon, 01 Jul 2013, 15:19
Forum: Batteries, charging, management and monitoring
Topic: cable curling
Replies: 40
Views: 5710

cable curling

I loop up my cables (network/power/audio) + ropes this way. gjdYpyGh3zM Not shown in the video, you can hold one end and throw the loop, and it uncoils no twists or tangles or anything (provided the cable has not been abused up). Each loop twists the cable the alternate way, meaning the tension even...
by woody
Tue, 25 Jun 2013, 21:21
Forum: The Lounge
Topic: Wanting to convert a 2 ton Yank Tank to electric
Replies: 9
Views: 1125

Wanting to convert a 2 ton Yank Tank to electric

Richo wrote: Dates have ~541kJ/100g.
As far as I know, this is "dietry kilojoules" which is only an approximation, taking into account the average efficiency of human consumption...
by woody
Thu, 13 Jun 2013, 22:51
Forum: Technical and conversion discussion
Topic: Pedal box as an alternative to brake vacuum pump.
Replies: 17
Views: 2249

Pedal box as an alternative to brake vacuum pump.

Has anyone done any regen tests to see if lockup is possible? e.g. 1. adjust regen to maximum torque 2. drive down wet road 3. apply maximum regen under a Jacaranda tree Probably applicable to Johny and other old^H^H^H^H classic car drivers, I recently replaced my turn of the century tyres with new ...
by woody
Mon, 03 Jun 2013, 23:39
Forum: Technical and conversion discussion
Topic: Vacuum brake connection
Replies: 6
Views: 1065

Vacuum brake connection

Test how many smashes of the pedal you get assistance with after turning off the engine, and change the size of your custom reservoirs accordingly.
by woody
Tue, 28 May 2013, 13:03
Forum: EV Motoring
Topic: Better Place Australia Closes.
Replies: 30
Views: 3537

Better Place Australia Closes.

Don't be sad, they've gone to a better place... Image
by woody
Tue, 21 May 2013, 03:04
Forum: Members Machines
Topic: Johny's Electric Vogue
Replies: 287
Views: 39836

Johny's Electric Vogue

More thoughts - if it's just at certain speeds, then the tail shaft lack of stiffness can't be causing it, maybe just amplifying it. If the tail shaft was eccentric badly, it would shake the car more and more violently, as the speed got higher. For a stroboscope, 50Hz is readily available (incandesc...
by woody
Tue, 21 May 2013, 02:54
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 27870

Renard's BMW

Great work Renard!

Edit: you need to work on your "EV Grin" though...
by woody
Mon, 20 May 2013, 22:29
Forum: Members Machines
Topic: Johny's Electric Vogue
Replies: 287
Views: 39836

Johny's Electric Vogue

At the time I had the tailshaft made I wanted to loose some weight on it so went from a 3" to 2 1/2" diameter tube. The tube section is 1193mm long and I figured that the guys would balk if that was unreasonable. Perhaps a mistake there. It's counter-intuitive (to me, at least), but you get better ...
by woody
Fri, 17 May 2013, 15:35
Forum: Electric motors and controllers
Topic: Siemens 1PV5138-4WS24
Replies: 43
Views: 6386

Siemens 1PV5138-4WS24

Depending on what you are doing, a final drive of 8.28:1 or thereabouts may be hard to arrange in a car, with most final drive ratios around 3:1 and maybe 5:1 (Hilux/Hiace) being the upper limit of cheaply available, 6.5:1 the highest I've seen in aftermarket (Ford 9 inch). Maybe a Hilux 5:1 behind ...
by woody
Wed, 15 May 2013, 20:18
Forum: Electric motors and controllers
Topic: Siemens 1PV5138-4WS24
Replies: 43
Views: 6386

Siemens 1PV5138-4WS24

I think they are going to run the two 360V packs in parallel to make a 360V system.
by woody
Wed, 15 May 2013, 15:35
Forum: Members Machines
Topic: Weber and Coulomb's MX-5
Replies: 1698
Views: 333983

Weber and Coulomb's MX-5

possibly a simpler and almost as good measure is comparing the sum of the battery internal resistances to the motor controller internal resistance. When a link goes bad this difference should get wider, the problem then is to find out which link... Could be used with your system as a "only check for...
by woody
Sat, 27 Apr 2013, 01:50
Forum: Scooters, mopeds and electric toys
Topic: Faster than a speeding car
Replies: 8
Views: 2353

Faster than a speeding car

"If you want an electric motorbike, get an electric motorbike."

Discuss
by woody
Mon, 22 Apr 2013, 16:58
Forum: Scooters, mopeds and electric toys
Topic: Scooter Dreams
Replies: 11
Views: 3760

Scooter Dreams

Looks like a great way to get around town or to/from the train. Silly that NSW laws don't allow this kind of thing...
by woody
Tue, 16 Apr 2013, 23:51
Forum: General EV Discussion
Topic: EV Segment on the ABC's Checkout program
Replies: 46
Views: 3649

EV Segment on the ABC's Checkout program

17% might be estimated average across all users. If you had a common trip across a big hill or valley, regen would be a much bigger advantage than if you lived on the flats. But you'd still get better overall economy on the flats. Regen captures some (most?) of the wasted energy, but better not to w...
by woody
Tue, 16 Apr 2013, 23:46
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 27870

Renard's BMW

Ha, I thought ABS and Polycarbonate were the same thing, I was wrong

Renard - looking great!
by woody
Mon, 15 Apr 2013, 11:57
Forum: Electric motors and controllers
Topic: how to combine torque control and speed control
Replies: 24
Views: 3082

how to combine torque control and speed control

An ICE pedal isn't pure torque control, there is a speed factor complicated by the gearbox - the throttle has a different effect at high revs vs low revs because the air volume intake is very different.
by woody
Sat, 13 Apr 2013, 22:06
Forum: General EV Discussion
Topic: EV Segment on the ABC's Checkout program
Replies: 46
Views: 3649

EV Segment on the ABC's Checkout program

I've heard from Renault? via Robert Llewelyn that petrol takes approximately the same amount of electricity to mine,refine,deliver as could be used to drive an EV the same distance? So Mr Checkout wasn't entirely fair, in that the CO2 emissions only include the burning of petrol (tank to wheel), not...
by woody
Tue, 02 Apr 2013, 22:00
Forum: Members Machines
Topic: seligtype3 1969 Volkswagen Type 3
Replies: 194
Views: 39751

seligtype3 1969 Volkswagen Type 3

manufacturer webpage says input is AC, so I think it wouldn't matter.

But I'd wait for someone who has one to pipe in :-)

Pics look great!
by woody
Mon, 01 Apr 2013, 03:22
Forum: The Lounge
Topic: electric big foot
Replies: 1
Views: 416

electric big foot

It's good to hear the crushing of the soulless Tauruses, but I'm not sure this is the right target market...
by woody
Fri, 22 Mar 2013, 21:58
Forum: Admin Notices
Topic: Forum Emails
Replies: 5
Views: 1234

Forum Emails

Hi,

I subscribe to most of this forum via email, but I haven't received any since Tuesday (9:58 am "Holden volt release").
Has this feature been turned off or is there a problem with the email in general?
by woody
Thu, 21 Mar 2013, 12:36
Forum: General EV Discussion
Topic: Le' Electric Bike Design Competition
Replies: 2
Views: 1124

Le' Electric Bike Design Competition

I voted!
by woody
Tue, 12 Mar 2013, 04:13
Forum: The Lounge
Topic: Wood is not an insulator
Replies: 2
Views: 543

Wood is not an insulator

Slightly on-topic, artistic video of 15000 volts vs Plywood.

Vimeo
by woody
Wed, 06 Mar 2013, 04:15
Forum: Members Machines
Topic: Johny's Electric Vogue
Replies: 287
Views: 39836

Johny's Electric Vogue

Also - how much travel is there in the sliding spline (or whatever expansion you are using)? Are you at the limit?