Search found 528 matches

by theRealFury
Dec 19 2011 9:39am
Forum: Battery Technology
Topic: leaderhobby LiPo packs? Has anyone experience with?
Replies: 127
Views: 9917

Re: leaderhobby LiPo packs? Has anyone experience with?

Well i think that concludes this thread then.

Dont give Leaderhobby any of your $$$ as its throwing it away.

I must admit im not surprised given the insane prices they are charging for stuff, but i guess you never know until someone / or some people play guinneypig and order a sample.
by theRealFury
Dec 09 2011 6:36am
Forum: E-Bike Technical
Topic: New Crystalyte Motor series (HT35 / HS35 and HT24 / HS24)
Replies: 1395
Views: 178549

Re: New Crystalyte Motor series (HT35 / HS35 and HT24 / HS24

Does 8 speed freewheel will fit crystalyte HS3540 or 7 speed freewheel is max :?: I have an 8 speed freewheel on my HS3540, i didnt have to stretch the frame (it first but perfectly, no free space at all on my stock 135mm dropouts), i did need an aditional washer but thats it. Been working for abou...
by theRealFury
Dec 07 2011 9:24am
Forum: Battery Technology
Topic: Did I get Thundersky or GBS cells?
Replies: 7
Views: 595

Re: Did I get Thundersky or GBS cells?

Hmm, being yellow i would of thought they were TS, GBS cells are usually a light blue/green colour. What is the weight of the 12V 60AH pack without any cabling. is it 9.2KG? If its closer to 10KG then its TS... i think GBS has about a 10% better energy density than TS.
by theRealFury
Dec 06 2011 6:59am
Forum: Battery Technology
Topic: iCharger 3010b regenerative discharge setup advice anyone?
Replies: 23
Views: 2454

Re: iCharger 3010b regenerative discharge setup advice anyon

Thats not regen mode, thats just Discharge+ mode which used an external load such as a resistor to increase discharge power. The regen discharge specifically means discharging one battery to directly charge another. Basically a storage battery takes the place of the power supply in a normal RC charg...
by theRealFury
Dec 06 2011 6:52am
Forum: E-Vehicles General Discussion
Topic: CRODRIVER and the 2012 RIMAC... AMAZING WORK !!!
Replies: 59
Views: 6147

Re: CRODRIVER and the 2012 RIMAC... AMAZING WORK !!!

Really nice work, te car looks amazing. Just a shame its got $300,000-$500,000 written all over it, which basically puts it in the bracket of fantacy car in my mind. I dont doubt that 92KWH can do 600KM... these claims are usually backed by a small print stating driven on flat ground at an average o...
by theRealFury
Dec 05 2011 7:07am
Forum: Battery Technology
Topic: Voltage sag graph & "ArduWattmeter"
Replies: 8
Views: 2574

Re: Voltage sag graph & "ArduWattmeter"

Hey, @ 2.75c discharge 10v of sag i would say is very normal. As for the cycle life. they are reated for 3000 cycles at 0.5c discharge.. or 20amps discharge. You are discharging 5x that fast at peak.. i would immagine therefore that your predicted cycle life would be somewhere in the 500-800 region,...
by theRealFury
Dec 05 2011 5:57am
Forum: Battery Technology
Topic: Voltage sag graph & "ArduWattmeter"
Replies: 8
Views: 2574

Re: Voltage sag graph & "ArduWattmeter"

Hello, your ~10v of sag is not that bad really, during the summer with my old 36v LI-MN battery i used to get ~3V of sag @ 2C but in the winter that voltage sag was going up to 4-5v @2C. I would immagine what you are seeing is about normal for a TS pack that is run @~2C discharge. Unfortunately they...
by theRealFury
Dec 02 2011 6:22am
Forum: Battery Technology
Topic: A123 20ah PRISMATIC CELL from A123rc (Solar Charger)
Replies: 19
Views: 2893

Re: A123 20ah PRISMATIC CELL from A123rc

Yea, Nichcrome wire is something that can be used, dont know why i didnt think of it at the time as i use it myself lol, but like you say, to get a decent current you need a lot of it, i only have about 2 foot of it from a hairdryer i butchered. on my 2 cell tests at about 8V i could only pull 5 amp...
by theRealFury
Dec 02 2011 5:54am
Forum: Battery Technology
Topic: A123 20ah PRISMATIC CELL from A123rc (Solar Charger)
Replies: 19
Views: 2893

Re: A123 20ah PRISMATIC CELL from A123rc

It's easy to discharge at stupidly high rates. Jumper leads coiled inside a bucket of water to keep them cool. Clamp them on, read the current from a current clamp and wait. I did this for my Turnigy pack without the water cooling: Thats true, but that is the equivelent of a dead short, which will ...
by theRealFury
Dec 02 2011 5:26am
Forum: Battery Technology
Topic: Nano-tech 6s 8000mah (USA)
Replies: 19
Views: 3522

Re: Nano-tech 6s 8000mah (USA)

apart from a higher volatage throughout the discharge curve leading to slightly more w/h coming out compared to say a 20-30C normal lipo, i have also not seen any evidence that they are any better in cycle life than any other lipo. What also remains to be seen is how many cycles the average lipo can...
by theRealFury
Dec 02 2011 2:58am
Forum: Battery Technology
Topic: A123 20ah PRISMATIC CELL from A123rc (Solar Charger)
Replies: 19
Views: 2893

Re: A123 20ah PRISMATIC CELL from A123rc

Discharging a single cell is not as easy as it would seem, well discharging it quickly at least. You could easily discharge one with a cheap lipo charger that also has a LiFe setting but they usually only discharge at 20-25W unless you pay $100+ for a decent one with either regenerative discharge or...
by theRealFury
Dec 01 2011 3:34am
Forum: Battery Technology
Topic: Cleancarb of Luxembourg offering Kokam,Yuntong,Thundersky
Replies: 9
Views: 1293

Re: Cleancarb of Luxembourg offering Kokam,Yuntong,Thundersk

i dont know why, but the Kokam cell 55205130H @ 11AH and 55amp continuous, 110amp peak seems like a really nice cell for a mid range Ebike. I know they would suite me with my current power requirements IF the specs were legit. 12 of these would be 44v nominal and 11AH at ~7.9lbs. Now, if you could r...
by theRealFury
Nov 29 2011 6:11am
Forum: Battery Technology
Topic: messing around with the icharger 208b
Replies: 9
Views: 884

Re: messing around with the icharger 208b

couldnt you just hook up a DC/DC converter such as the one Lyen sells to the solar pannels and set output voltage to 16V or something of the like. They are rated for 3amps so 1.6amps of solar should be fine for it and it would ramp the current supplied to the charger down as the solar wattage droppe...
by theRealFury
Nov 22 2011 8:33am
Forum: E-Bike Technical
Topic: New Crystalyte Motor series (HT35 / HS35 and HT24 / HS24)
Replies: 1395
Views: 178549

Re: New Crystalyte Motor series (HT35 / HS35 and HT24 / HS24

please excuse me for the question...but what's the maximum KW that HT3525 can handle? I'm planning to use 100V battery and 50A controller... I have read that the saturation point of the stator is around 10KW but anything over 2-3KW (depending on ambient temps) will need to be thermally monitored to...
by theRealFury
Nov 21 2011 11:27am
Forum: E-Vehicles General Discussion
Topic: Tiny Car Gets 350 MPG
Replies: 21
Views: 2033

Re: Tiny Car Gets 350 MPG

Excellent, thanks for the links, im still reading them now. I had no idea this was happening. Nice to see school children being enducated in EV's and especially efficiency, these children are the car designers of tomorrow and the more of this type of thing they do the better the cars are likely to b...
by theRealFury
Nov 21 2011 8:02am
Forum: E-Vehicles General Discussion
Topic: Tiny Car Gets 350 MPG
Replies: 21
Views: 2033

Re: Tiny Car Gets 350 MPG

) Big deal ;^) Our greenpower race car, made by 15 yr old schoolgirls (+ me & a teacher) travelled 108 miles in 4 hrs on 6 35Ah 12V lead acid batteries. That is the energy equivalent of 0.6litres of petrol or 3100mpg. Thats at nearly 30mph. The formula rules prevent us being properly efficient or ae...
by theRealFury
Nov 18 2011 10:01am
Forum: E-Bike Technical
Topic: Impossible to connect an alarm system?
Replies: 21
Views: 1343

Re: Impossible to connect an alarm system?

I dont see how you can overcome this... you want to wire up a 12V alarm to your ebike system but dont want to run it off a DC/DC converter because it will use too much power?? only thing else you could do is use a highly efficient buck converter but the difference between your alarm drain and the dc...
by theRealFury
Nov 18 2011 8:18am
Forum: E-Vehicles General Discussion
Topic: Efficiency
Replies: 14
Views: 1492

Re: Efficiency

I could not agree more, i use the Schwalbe land cruiser and i have to say that they are the best tyres i have ever had on my bike. Excellent rolling at 50-60psi and good grip offroad as well. I realy worry about goning up to 80-100PSI as i dont want to damage the tyre or tube that are rated for 60PS...
by theRealFury
Nov 17 2011 10:23am
Forum: E-Bike Technical
Topic: New Crystalyte Motor series (HT35 / HS35 and HT24 / HS24)
Replies: 1395
Views: 178549

Re: New Crystalyte Motor series (HT35 / HS35 and HT24 / HS24

No its not just dry weather riding. The motor its self can run totally submerged under water... only problem you have with a motor is that the repeated wetness and then drying out can cause the insides to rust over time. If you live in Europe or just want to be able to go out in the rain when ever y...
by theRealFury
Nov 16 2011 10:26am
Forum: E-Vehicles General Discussion
Topic: DeLorean
Replies: 3
Views: 577

Re: DeLorean

As long as its top speed is over 88miles per hour and it comes complete with flux capacitor ill have one :)
by theRealFury
Nov 16 2011 10:20am
Forum: E-Vehicles General Discussion
Topic: Newbee Competition help
Replies: 10
Views: 692

Re: Newbee Competition help

If you absolutely have to go with an ICE then so be it, but it sounds like you have a choice and you are wanting to choose to run an ICE and an electric motor. If this is the case then as soon as you start the ICE motor then you have effectively lost the competition to an all electric motor vehicle....
by theRealFury
Nov 16 2011 9:44am
Forum: E-Vehicles General Discussion
Topic: Tiny Car Gets 350 MPG
Replies: 21
Views: 2033

Re: Tiny Car Gets 350 MPG

The problem that most people get hung up on (and i just want to beat most of them round the face with a wet salmon!!!) is that same old cherry! "My car goes 600miles on a tank of fuel, until electric can match this im sticking with the planet killer" Well, for the 1-2% of the world population that t...
by theRealFury
Nov 16 2011 9:12am
Forum: E-Vehicles General Discussion
Topic: Efficiency
Replies: 14
Views: 1492

Re: Efficiency

Hey, I fully believe the difference in effieciency. I used to run on 26x2.1 knobbly tyres pumped up to 60PSI, but last month i upgraded to 26x1.9 schwalbe land cruiser tyres with low rolling resistance center tread pumped up to same 60PSI. My average consumption on the 10 mile trip i do every saturd...
by theRealFury
Nov 16 2011 8:28am
Forum: Alternative Energy
Topic: Bad News for Solar Panel Industry
Replies: 23
Views: 3394

Re: Bad News for Solar Panel Industry

Australia's last Solar panel manufacturer closed down operations this week ! :cry: The industry has been destroyed by farcical government policy's which offered huge rebates to stimulate the industry ( but also encouraged huge amounts of Chinese made imports), then cut the rebates, leaving containe...
by theRealFury
Nov 16 2011 7:10am
Forum: Battery Technology
Topic: lead in the uk
Replies: 24
Views: 1222

Re: lead in the uk

For £189 including delivery you could buy a 36V 15Ah cheap ass lithium. Not something I would buy but between that and lead I would buy this. Voltage: 36 V Lifecycle: >1000 times 85% capacity after Capacity: 15 AH Charging Voltage: <45 V Charging Current: 0~1.5C Rated Discharging Amperage:15A Max C...