Search found 82 matches

by AmpEater
Jun 21 2010 9:03pm
Forum: General Discussion
Topic: NEW 445nm 1W real BLUE laser for cheap!!!
Replies: 26
Views: 4105

Re: NEW 445nm 1W real BLUE laser for cheap!!!

I've read a lot about this particular laser, and really guys, please don't buy one. Apparently it carries more of a blindness risk than you can even comprehend. Besides that, it's incredibly cool. Just the fact that we can concentrate that much power in such a small space with solid state electronic...
by AmpEater
Jun 21 2010 1:08pm
Forum: Battery Technology
Topic: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)
Replies: 281
Views: 30151

Re: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)

Anything that gives 1000 "full" use cycles with less than 90% drop of capacity pretty much means it will most likely live through the battery technology advances to the point that it's price will probably drop because of more advanced tech being cheaper per kWh with better qualities than the fact t...
by AmpEater
Jun 21 2010 12:31pm
Forum: Battery Technology
Topic: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)
Replies: 281
Views: 30151

Re: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)

I'm becoming more and more interested in the 10C+ cyclic life. Problem is....cycle testing a 5.8ah cell at 10c requires 58A of current, and the most any of the cycle chargers can dish out right now is 30A. So I'm thinking about buying some 2200mah cells and putting them through Charge 4.1v -> 3.3v a...
by AmpEater
Jun 21 2010 12:57am
Forum: Battery Technology
Topic: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)
Replies: 281
Views: 30151

Re: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)

Someone here (I won't name names) actually lances their puffy packs to release the built up gasses at the edge folds. I've done it and not caused a fire, but those cells are very much lower capacity about 1/5th lost. These things will drop like stones (seems to be a common thread amongst everyone's...
by AmpEater
Jun 21 2010 12:52am
Forum: Battery Technology
Topic: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)
Replies: 281
Views: 30151

Re: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)

There are handful of manufacture graphs for LiCoO2 LiPoly batteries (same as RC lipo) that show a massive improvement of 10x the number of cycles by switching from a 4.25 HVC to a 4.125HVC. I know it's hard to imagine 0.125 difference could matter so much, but I would LOVE to get some real world da...
by AmpEater
Jun 21 2010 12:39am
Forum: Battery Technology
Topic: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)
Replies: 281
Views: 30151

Re: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)

1C charging is probably more representative of how most are used (in reality most are probably charging at less) but again for the sake of completeness it'd be interesting to charge at 1C and 2C and see how it affects the life. I for one would be happy to contribute towards the cost of another pack...
by AmpEater
Jun 20 2010 11:54pm
Forum: Battery Technology
Topic: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)
Replies: 281
Views: 30151

Re: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)

Ampeater could you add or substitute one of the tests for a charge to 4.15v and discharge to 3v ? That's how many of us are using ours, although most of us rarely take them to the 3v LVC - maybe 3.3 would be more realistic? You could probably do away with with the 4.3 or 4.0v, I don't think any of ...
by AmpEater
Jun 20 2010 11:17pm
Forum: Battery Technology
Topic: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)
Replies: 281
Views: 30151

Re: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)

I was just thinking about that...and I do think I know All together I had 3 packs with cells below 2v, 2 of them I charged super slowly at like 50mah (it took days) and are cycling and testing 100%. The 3rd one I was getting cocky about recovering the others so I just threw it on the charger and hit...
by AmpEater
Jun 20 2010 11:06pm
Forum: Battery Technology
Topic: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)
Replies: 281
Views: 30151

Re: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)

I broke down my 8s 5.8ah 25c turnigy pack with a slightly puffy cell. Ended up dropping one on the concrete floor, so that leaves me with 6 good cells to cycle test. I'm thinking of a new set of tests Cell 1 - 4.3v -> 3.0v at 4c Cell 2 - 4.2v -> 3.0v at 4c Cell 3 - 4.1v -> 3.0v at 4c Cell 4 - 4.0v -...
by AmpEater
Jun 20 2010 10:02pm
Forum: Electric Watercraft
Topic: So I want to build an electric kayak
Replies: 14
Views: 10670

Re: So I want to build an electric kayak

Wow, thanks for the detailed reply. I never would have thought to try an airplane prop on a trolling motor! I remember years ago trying to cut down a geared RC setup so it wouldn't bog down so much, but obviously that didn't work or I wouldn't be asking this. I'm definitely going to look into that, ...
by AmpEater
Jun 20 2010 1:10pm
Forum: Electric Watercraft
Topic: So I want to build an electric kayak
Replies: 14
Views: 10670

Re: So I want to build an electric kayak

GREAT IDEA .......r/c motor in hull. prop or jet drive. Aircraft prop style way way to noisy and annoying in what would be a silent journey IMO. Any info on setting one up? It would be the ideal system, IMHO. But there just doesn't seem to be alot of into out there (maybe I am just searching for th...
by AmpEater
Jun 20 2010 10:51am
Forum: Electric Watercraft
Topic: So I want to build an electric kayak
Replies: 14
Views: 10670

So I want to build an electric kayak

Kayaking is awesome. Its a simple fact. But, like most things in life, I find myself wanting to incorporate electricity. Tragically I lost my (crappy) kayak in a big flood about 2 years ago, and I've been wanting a new one ever since. I've got some money set aside, but I haven't made any decisions y...
by AmpEater
Jun 20 2010 10:07am
Forum: Battery Technology
Topic: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)
Replies: 281
Views: 30151

Re: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)

"That might be an option for you ampeater considering you're looking at buying such a large quantity. They sound like some serious packs you're constructing! If anything ever goes wrong with your packs you won't have to worry about return shipping to china, with that quantity of lipo in your garage ...
by AmpEater
Jun 20 2010 9:59am
Forum: Battery Technology
Topic: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)
Replies: 281
Views: 30151

Re: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)

I had my batteries shipped back to them, and then shipped back to me via alternative couriers and arrive before they even updated the system with the second tracking number. It seems like they are much better about getting stuff out the door than updating their system.
by AmpEater
Jun 19 2010 6:09pm
Forum: Battery Technology
Topic: iCharger3010B $40 Discount ($190 vs $230)GENERAL DISCOUNT?!
Replies: 3
Views: 499

Re: iCharger3010B $40 Discount ($190 vs $230)

$165?

I paid like $176 around a week ago
by AmpEater
Jun 19 2010 3:59pm
Forum: Battery Technology
Topic: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)
Replies: 281
Views: 30151

Re: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)

Only thing is, I need to build a 150v lawnmower now. I've bought a new zero turn specifically for converting, as I am going to be testing the waters for an electric lawn care company. The original plan was an etek motor (I have a 15+ yr old john deere that I've converted too with an etek)....but I'...
by AmpEater
Jun 19 2010 12:20pm
Forum: Battery Technology
Topic: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)
Replies: 281
Views: 30151

Re: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)

*sniff sniff.... what's that i smell ?... Insanity !!!.. yep.. that's it alright... :o :P How else do you rationalize a purchase with no warranty from a chinese company known to have customer service issues for a pack of batteries with an unknown cycle life or quality control standard when even a s...
by AmpEater
Jun 19 2010 11:09am
Forum: Motor Technology
Topic: 12 kw rc motor
Replies: 1876
Views: 219772

Re: 12 kw rc motor

It looks like interest has already been established, but in case it matters put me down for 4 of these (for now...)
by AmpEater
Jun 19 2010 10:34am
Forum: Battery Technology
Topic: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)
Replies: 281
Views: 30151

Re: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)

Wow, thats a big ol' pile of LiPo there... :shock: How are you thinking of configuring your modular packs, in 8s chunks, or something larger? The 8s-5800 "long" packs are on flash sale right now, for $97. I heard from HobbyPartz that their big shipment is now scheduled to arrive "early to mid-July....
by AmpEater
Jun 19 2010 10:06am
Forum: E-Bike General Discussion
Topic: A new form of ebike propulsion
Replies: 20
Views: 2759

Re: A new form of ebike propulsion

OK....so I want to do this (on a boat) Does anyone know of a good motor and prop combination for pushing big stuff at relatively low speeds? Direct drive for simplicity. Just go with a monster turnigy and a 18" prop? Its got to be more complicated than that I'm going to be putting it on a kayak. Sol...
by AmpEater
Jun 19 2010 9:00am
Forum: E-Bike General Discussion
Topic: A new form of ebike propulsion
Replies: 20
Views: 2759

Re: A new form of ebike propulsion

johnrobholmes wrote:That doesn't look dangerous at all! Great for clearing off pedestrian paths :P
Not one bit

As a bonus it automatically trims the hedges
by AmpEater
Jun 19 2010 8:56am
Forum: Battery Technology
Topic: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)
Replies: 281
Views: 30151

Re: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)

I have one 3010b and a dud 6S 5ah pack, maybe we can combine our efforts in the test variations.. What "premise" are you interested in? I am obviously curious about overall cycle life, and based on different peak voltages. But I also want to do a set of 120* f tests because I've read that it is at ...
by AmpEater
Jun 19 2010 8:35am
Forum: E-Bike General Discussion
Topic: A new form of ebike propulsion
Replies: 20
Views: 2759

Re: A new form of ebike propulsion

Wow.....awesome. I have thought about doing something very similar but on a kayak to avoid all the complexity of a common submerged propeller. I always have a hard time imagining that it would have enough "push"....but it doesn't look like thats a problem with these monster motors. Very interesting ...
by AmpEater
Jun 19 2010 1:58am
Forum: Battery Technology
Topic: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)
Replies: 281
Views: 30151

Re: Zippy/ Flightmax / Turnigy/ Blue lipo testing (pt 2)

If it's not all under wraps, I would love to know what sort of super monster setup you're building with 5kwhrs of high performance LiPo. :) I noticed in another thread he's just picked up 2 of lyens 132v 18 fet controllers. I don't think it'll be a slouch! Someone is paying attention :D That was a ...