HobbyKing.com New Products Flash Sale
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Old Oct 29, 2008, 12:35 PM
Electric flyer
fly time's Avatar
Renton, WA, US
Joined Oct 2007
1,291 Posts
Quote:
Originally Posted by bz1mcr
I have not tried them, but the shipping charge is outrageous, and they only discount shipping 20% for combined shipments. That indicates 80% of the shipping charge is really just part of the price and profit.

On a total cost basis I think Hobby city is a better source.
I don't think $9.99 to ship a battery overseas is necessarily outrageous. That is actually about what it costs. If you are buying just one, it's not a bad way to go. If you are buying a bunch of stuff, then Hobby City is clearly the smart choice.
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Old Nov 22, 2008, 01:57 PM
Registered User
Boston, MA
Joined Jan 2007
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whoever created progressiverc site is genius! good job guys!
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Old Nov 22, 2008, 03:52 PM
ProgressiveRC
write2dgray's Avatar
Seattle, WA
Joined Dec 2006
1,997 Posts
Lists Updated 11/22

The RC product lists have received a long overdue update with tons of added products and updated prices. Here are just a few of the products now listed:
  • Many new motors including Reaper Brushless and new stuff from Scorpion
  • Batteries: Added Thunder Power "Pro Power" and "ProLite V2," new CellPro Red Label, updated LiFE pricing and links
  • Added FMA Direct Quazar ESCs
  • 74 new chargers including new iChargers, Graupner, Bantam, and MegaPower
There is now a column added for the 2,000+ batteries which shows the max. continuous recommended current draw (Cont. A) for any given battery.

A column has also been added to many of the pages for product manuals and many links are now populated.

Attached is an updated recap of the information listed by product type.
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Old Nov 22, 2008, 04:28 PM
Registered User
Melbourne, Australia
Joined May 2006
6,407 Posts
Some charger update info FYI:

Graupner Ultra Duo Plus 50 - http://www.racingfactory.fi/shop2/ca...ils.php?p=2301
Quote:
Operating voltage: 11-15 V / 40 A DC or 100-240 V AC mains supply
Charge capacity per output:
- 1-18 NiMH / NiCd cells
- 1-7 LiPo / LiIo / LiMn / LiFe cells
- 1-6, 12 lead-acid cells

Charge current:
- 2 x 0.1 A-10 A with mains PSU (total max. 120 W)
- 2 x 0.1 A-10 A with 11-15 V with DC supply (max. 2 x 180 W or 1 x 250 W)

Discharge current approx. 0.1-10 A (2 x max. 80 W)
Balancer socket: 2 x 1-7 NiMH / NiCd / LiPo / LiIo / LiFe cells
Max. balancer current approx. NiMH / NiCd: 0.1A, LiPo / LiIo / LiFe: 0.3A
Dimensions approx. 230 x 225 x 83 mm
Weight excl. mains lead approx. 2200 g
Bantam BC8DX = USD$360, manual here: http://www.rcaccessory.com/pdf/BC8DX-Manual.pdf
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Old Nov 22, 2008, 05:45 PM
Registered User
Boston, MA
Joined Jan 2007
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write2dgray, are you looking for people to help you with this project, e.g. look up prices, sort out the chart, add more models, etc.
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Old Nov 22, 2008, 06:02 PM
ProgressiveRC
write2dgray's Avatar
Seattle, WA
Joined Dec 2006
1,997 Posts
Quote:
Originally Posted by kgfly
Some charger update info FYI:
Thanks Kenneth!
Quote:
Originally Posted by HoaRC
write2dgray, are you looking for people to help you with this project, e.g. look up prices, sort out the chart, add more models, etc.
Yes, but currently it's difficult to update info to the website quickly and efficiently. If you have some time to help out please shoot me a pm or email. What I *really* need is a software guru to help out with the whiz-bang database stuff on the backend. A fellow RCGroup member offered up some help, but just before the project was to go live, there were personal/health reasons that arose preventing the completion.

Ultimately, it would be nice to have a system that is easy to update and that users can offer feedback, like star ratings on projects, and also update and add products; lightly moderated. But this takes programming skillz far beyond my own...

- David
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Old Nov 23, 2008, 10:04 AM
Loves Learning
master g's Avatar
Joined Oct 2007
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Quote:
Originally Posted by Joel K. Scholz
You Sir, are a gentleman and a scholar. Thanks for the great info
Totally agree
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Old Dec 05, 2008, 11:39 PM
Registered User
Joined Aug 2008
18 Posts
battery comparison

Hi everyone,
I just purchased a Blade CX2 Heli, still skiding it on the office desk, no lift off yet.
Looking at the li-po battery 800 mah, 7.4v it weighs 43 grams. I have a lot of duracell 2650 mah ni-mh batteries and the weight of 6 is 179 grams @ 7.2v

The li-po battery charges in about an hour, and replacment cost is 25-30 dollars US.

The AA duracells cost a little over 2 dollars ea, and 15minute chargers (4 batteries at a time) cost 29 dollars. Also they are fan cooled and cut off at full charge.
The duracell weight is 4.16 times more, but the capacity is 3.31 times greater.

The question I have is, knowing that the extra weight will tax the motors, will the duracell batteries give up enough current, and in the long run be more cost effective ?

Thanks for any comments

RonLL
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Old Dec 05, 2008, 11:48 PM
swede
denial15's Avatar
United States, UT, Vineyard
Joined Aug 2005
3,840 Posts
Quote:
Originally Posted by RonLL
and in the long run be more cost effective ?
no. You can find some pretty inexpensive and worthwhile LiPo's.
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Old Dec 05, 2008, 11:56 PM
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Joined Aug 2008
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Quote:
Originally Posted by denial15
no. You can find some pretty inexpensive and worthwhile LiPo's.
Thanks, just what I needed to find.

Ron
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Old Dec 06, 2008, 08:35 AM
AKA Don
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United States, MI, Houghton Lake
Joined Dec 2002
7,574 Posts
RonLL,
Without LiPo's these heli's were pretty much impossible. Adding over 100 g to one of these helis is pretty much out of the relm of practicality. You would not like the way it flys. If it flys at all with that weight, the stock motor life would be very short.
Don
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Old Dec 06, 2008, 09:32 AM
What's that button do?
Shpook's Avatar
Hollywood, FL
Joined Feb 2008
1,347 Posts
The CX2 in it's stock form will never take off with that much weight. Might get an inch or two off the ground due to the extra lift from ground effect.
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Old Jan 16, 2009, 09:34 AM
Newton and I are good friends
United States, NC, Asheville
Joined Jan 2009
2,050 Posts
David tks for all the hard work, your site has helped this newbie to electric flight out tremendously...after around 40 yrs of nitro rc i thought i new alot lol yeah then getting into electrics just recently and wow!!! tks again DJ
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Old Jan 16, 2009, 11:46 AM
ProgressiveRC
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Seattle, WA
Joined Dec 2006
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You're welcome DJ - glad to help out! And welcome back to the hobby.

Cheers,
David
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Old Jan 17, 2009, 12:29 AM
QPower 18650
madhun1's Avatar
Sunshine Coast
Joined Jun 2006
1,495 Posts
Quote:
Originally Posted by write2dgray
You're welcome DJ - glad to help out! And welcome back to the hobby.

Cheers,
David
Hi David,

Have you had any experience with the Falcon EV LifePo4 cells (Advanced Lithium)? They look very interesting. It would an interesting comparison to the A123 Cells. I was reading a little while ago somewhere, but cant for the life of me find it, a forum where (of all things) they were discussing modifying MagLite torches with Lifepo4 packs and LED light clusters. Was pretty interesting.

Also the lithium cobalt oxide cells, what is your experience with those? Are they charged with a usual Lifepo4 charger?
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