Search found 118 matches

by fuzzy-hair-man
Mon, 11 May 2009, 19:49
Forum: Batteries, charging, management and monitoring
Topic: 100 fold improvement of LiPO discharge rates
Replies: 14
Views: 2765

100 fold improvement of LiPO discharge rates

Quote taken from this thread (same topic) in an effort to get the topic all in the one place again. I believe that this is based on the same Nature article that this thread is: /forums/forum_posts.asp?TID=1011&PID=10411#10411 The consensus was I think that 1) this isn't all that much of a breakthrou...
by fuzzy-hair-man
Fri, 08 May 2009, 17:37
Forum: Electric motors and controllers
Topic: Model Aircraft Motor idea
Replies: 17
Views: 3424

Model Aircraft Motor idea

It's 20 poles running at 6300 rpm. A 2-pole running at 6000 rpm would be 100 Hz, so a 20-pole at 6300 rpm is 1050 Hz. It's a bit like transformers. The higher the frequency, the smaller and lighter they can be for the same power throughput. If you can transfer a fixed amount of energy per cycle the...
by fuzzy-hair-man
Thu, 07 May 2009, 20:50
Forum: Electric motors and controllers
Topic: Model Aircraft Motor idea
Replies: 17
Views: 3424

Model Aircraft Motor idea

That little thing has more power than my mini's original 998 engine! I'd guess it's less than 1/20 the size possibly 1/30th the weight!!! it all seems rather strange... http://forums.aeva.asn.au/smileys/smiley29.gif Put a 200W sticker on it and put that in your bicycle http://forums.aeva.asn.au/smil...
by fuzzy-hair-man
Wed, 06 May 2009, 17:25
Forum: General EV Discussion
Topic: 4WD EV
Replies: 18
Views: 2836

4WD EV

Juk you have me confused, 4wds don't drive around (the whole time) with locked centre differentials they are either free/standard (and lockable) centre diffs or limited slip centre diffs, if you lock the centre differential and leave it on you will have either or both of scrubbing tyres or trouble s...
by fuzzy-hair-man
Thu, 30 Apr 2009, 20:22
Forum: General EV Discussion
Topic: EV Sera
Replies: 22
Views: 3202

EV Sera

Nope I hadn't seen it, Cheers, after reading the thread I hadn't seen the Lightning either Image Image
Lightning Homepage
by fuzzy-hair-man
Thu, 30 Apr 2009, 17:14
Forum: Technical and conversion discussion
Topic: Accelerator Pedal Sensors
Replies: 41
Views: 5143

Accelerator Pedal Sensors

I figure as a worst case you could wrap cable around the twist grip, but then your car doesn't use a cable throttle does it. http://forums.aeva.asn.au/smileys/smiley36.gif Some sort of lever arrangement should be able to work? throttle linkages always seem like cobbled together bits of meccano that ...
by fuzzy-hair-man
Thu, 23 Apr 2009, 20:07
Forum: EV Motoring
Topic: EVme $70K
Replies: 48
Views: 12535

EVme $70K

doubling your speed doubles the energy needed per km to push the air out of the way. It also increases 4 fold the power needed to hold present speed. Doubling your speed quadruples the energy per km needed to overcome air drag, and increases the power requirement 8-fold. http://en.wikipedia.org/wik...
by fuzzy-hair-man
Thu, 23 Apr 2009, 20:06
Forum: EV Motoring
Topic: EVme $70K
Replies: 48
Views: 12535

EVme $70K

doubling your speed doubles the energy needed per km to push the air out of the way. It also increases 4 fold the power needed to hold present speed. Doubling your speed quadruples the energy per km needed to overcome air drag, and increases the power requirement 8-fold. http://en.wikipedia.org/wik...
by fuzzy-hair-man
Tue, 07 Apr 2009, 16:34
Forum: General EV Discussion
Topic: Free rego for EV's- is this happening here?
Replies: 12
Views: 939

Free rego for EV's- is this happening here?

Yeah I know the practicalities are probably a bit out there, I would just prefer to see Australian companies getting the support to build in Australia and I think it would be neat to see an Australian car company rather than paying to overseas companies to build here. Now would be one of the best ti...
by fuzzy-hair-man
Mon, 06 Apr 2009, 21:03
Forum: General EV Discussion
Topic: Free rego for EV's- is this happening here?
Replies: 12
Views: 939

Free rego for EV's- is this happening here?

I have that hybrid shudder again. http://forums.aeva.asn.au/smileys/smiley21.gif Have you driven a prius on emotor only ? US govt. would get even more value for future dollar if they paid 50% subsidy on teslas (the present US$7,500 is a great start though) Anyway. If Oz govt was cleaver they would ...
by fuzzy-hair-man
Thu, 02 Apr 2009, 21:46
Forum: EV Motoring
Topic: New Tesla family sedan
Replies: 9
Views: 1464

New Tesla family sedan

It says the 6th and 7th seats are rear facing child seats under the hatch. Almost my perfect car, just needs 4WD and variable height suspension, and a 90% price drop. Well the webpage says "All Wheel Drive is available" http://forums.aeva.asn.au/smileys/smiley17.gif http://forums.aeva.asn.au/smiley...
by fuzzy-hair-man
Wed, 01 Apr 2009, 22:31
Forum: General EV Discussion
Topic: 2 Speed Gearbox
Replies: 309
Views: 48739

2 Speed Gearbox

Oh sorry I wasn't dissing it they look quite cool and useful I just went looking for more info and if they would take the torque and RPM required and just posting back what I found, they do look a neater and smaller way of making drives do 90 degree bends than belts or chains. http://forums.aeva.asn...
by fuzzy-hair-man
Wed, 01 Apr 2009, 21:45
Forum: General EV Discussion
Topic: 2 Speed Gearbox
Replies: 309
Views: 48739

2 Speed Gearbox

Not quite what I had in mind, but this might come in handy for anyone wanting to step up or down their gearing / change drive direction http://www.tolomatic.com/products/product_detail.cfm?tree_id=141&CATEGORY=gearboxes-gear-boxes That is the simplistic design I am talking about. If we could keep t...
by fuzzy-hair-man
Wed, 01 Apr 2009, 19:01
Forum: General EV Discussion
Topic: 2 Speed Gearbox
Replies: 309
Views: 48739

2 Speed Gearbox

each car uses a different diff though, while the gearbox could be the same. I think there's a point where the extra efficiency is outweighed by the project being too specific, making it hard to be commercially viable. I was inclined to agree but then I though that Azure's gearbox is a gearbox / dif...
by fuzzy-hair-man
Wed, 01 Apr 2009, 16:59
Forum: EV Motoring
Topic: EVme $70K
Replies: 48
Views: 12535

EVme $70K

I was watching Today this morning and they had a bit on the iMiEV and they weren't sure what the price would be but their best guess seemed to be $64,000, they said it was ~$40,000 (I'm guessing in Aus $) in Japan but this included subsidies. If this is the case the EVme is starting to look pretty g...
by fuzzy-hair-man
Thu, 26 Mar 2009, 20:01
Forum: General EV Discussion
Topic: Factory backed EV to hit NZ
Replies: 8
Views: 823

Factory backed EV to hit NZ

Japanese Mitsutbishi iMiev site

A fair bit of good info if you can wait for the flash player to load. Image
by fuzzy-hair-man
Wed, 25 Mar 2009, 19:58
Forum: General EV Discussion
Topic: 2 Speed Gearbox
Replies: 309
Views: 48739

2 Speed Gearbox

I reckon a single stage planetary 2:1 reduction would be good. You could switch between direct and 2:1 easily and have no losses in direct mode. Do you mean these things? http://upload.wikimedia.org/wikipedia/commons/archive/d/d5/20060620161413%21Epicyclic_gear_ratios.png Looking at they they would...
by fuzzy-hair-man
Tue, 24 Mar 2009, 18:40
Forum: EV Motoring
Topic: EVme $70K
Replies: 48
Views: 12535

EVme $70K

Well I'm biased because the eVme is being built in Armidale my home town, http://forums.aeva.asn.au/smileys/smiley16.gif http://forums.aeva.asn.au/smileys/smiley27.gif but I think the engine and controller (assuming it's similarly specced) are some pretty high end stuff and I'd be pretty sure that t...
by fuzzy-hair-man
Mon, 23 Mar 2009, 22:32
Forum: EV Motoring
Topic: EVme $70K
Replies: 48
Views: 12535

EVme $70K

I also wonder if we can just glue a strong magnet to the rotor of a standard industrial machine, balance it well, put in better bearings, and get improved high speed performance. http://forums.aeva.asn.au/smileys/smiley4.gif They do sound kinda funky Quote from Metric Mind: BRUSA HSM6.17.12 hybrid ...
by fuzzy-hair-man
Mon, 23 Mar 2009, 21:55
Forum: EV Motoring
Topic: EVme $70K
Replies: 48
Views: 12535

EVme $70K

I want to know how they manage this this torque / power curve . The torque seems to only decay at 1/f, so the power is relatively steady at 70-80 kW. That efficiency is good, >100% between 2000 and 7000 rpm. http://forums.aeva.asn.au/smileys/smiley32.gif http://forums.aeva.asn.au/smileys/smiley36.g...
by fuzzy-hair-man
Mon, 23 Mar 2009, 20:23
Forum: Members Machines
Topic: Weber and Coulomb's MX-5
Replies: 1698
Views: 330691

Weber and Coulomb's MX-5

weber wrote: I think we'll just replace the spare tyre with a can of emergency inflater-sealer. Is that legal?
I've heard that it is not a registration requirement to have a spare but if you do have a spare it must have legal tread. This may have been NSW, not sure about Qld.
by fuzzy-hair-man
Mon, 23 Mar 2009, 19:48
Forum: EV Motoring
Topic: EVme $70K
Replies: 48
Views: 12535

EVme $70K

Reading between the lines and motor specs and the fact that they state they use a Swiss motor I think the motor is the BRUSA HSM 6.17.12 which is available here Metric Mind:Motors the price listed is $21,976.00 US for the motor only!! which goes a fair way to explaining the 70,000 price tag!! Thier ...
by fuzzy-hair-man
Tue, 17 Mar 2009, 20:58
Forum: Members Machines
Topic: First drive of industrial ac hilux
Replies: 60
Views: 8115

First drive of industrial ac hilux

I still need to do a wheel allignment for 0deg toe in I've driven a car with 0 degree toe in and it wasn't an enjoyable experience, of course yours is probably completely different but I'd be expecting to be adjusting it back again soon. I'd just put on disk brakes and set toe as 0 degrees until I ...
by fuzzy-hair-man
Thu, 12 Mar 2009, 22:26
Forum: Batteries, charging, management and monitoring
Topic: 100 fold improvement of LiPO discharge rates
Replies: 14
Views: 2765

100 fold improvement of LiPO discharge rates

Wow!!! If that's true and can be as easily applied as the article suggests the high discharge Li Ion battery producers are probably in for a hard time (unless they license the technology) as well as the ultracap producers (as noted in the article) and fuel cell proponents, if your EV pack takes minu...
by fuzzy-hair-man
Thu, 12 Mar 2009, 19:54
Forum: Members Machines
Topic: Weber and Coulomb's MX-5
Replies: 1698
Views: 330691

Weber and Coulomb's MX-5

The tie rod end IS a ball joint. Yep, have done both steering arm/rods and the ball joints at the top of the suspension with the whack it on the side of the taper method and this was recommended to me by my father who is also a mechanic after I got half way to stuffing it by whacking it on top http...