Revolutionary Li-Po cells of 5 Amps @ 2.11 ounce only !!!  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       

All Forums >> RC Airplanes >> RC Jets >> Revolutionary Li-Po cells of 5 Amps @ 2.11 ounce only !!!
Page: [1]

Login
Message << Older Topic   Newer Topic >>
Revolutionary Li-Po cells of 5 Amps @ 2.11 ounce only !!! - 3/22/2005 10:20:00 AM   
SpiderJets



Posts: 852
Joined: 12/26/2001
From: .., BELGIUM
Status: offline 		Dear Friends,

I just happened to return from Seoul, Korea, where I had dinner with some RC friends affiliated to Kokam, the leading manufacturer of Li-Po cells (and other stuff).
Mr. B.J. Park, who is their factory pilot and the current Korean F3A champ, told me Kokam has just developed a new type of Li-Po cell with the following astonishing characteristics :

Cell : 3.7 V
Capacity : 5 Amps (!!!)
Weight : 60 grams (!!!!) (2,11 ounces)
Discharge : max 20C (but 40 C is now in developement and will be soon tested in R/C)
Charge rate : 1,5 C max
Life span : 500 cycles

He states to fly his new electric F3A plane with an 8S cell pack, can make 3 (three !!!) full pattern F3A flights without recharging, and the batteries do not really get warm.

Someone in Japan experimented with these cells too, and used them in a Byron F-16 with a brushless motor with modified D/F. Take-off weight with batteries etc was 6 kgrs (13.22 lbs)... and he had a static thrust of an unbelievable 6,5 kgrs (14,33 lbs) !!!!!!! during a full throttle time span of 4 minutes. Plane was said to be very fast and sounded like a real turbine jet (large fan revving at 23000 RPM).

I am sure, with this kind of figures, electric flight with these new Li-Po cells might become a real substitute for combustion engines, if not even for gas turbines.

The researchers of Kokam said they are not even by far at the limits of technology in this new field of LiPo yet, and expect to be able to make much better performing cells in the next coming years.

The cells used by Mr. Park should be available in the trade somewhere in 2006, as they are now testing with his help the stability etc of these, but all results so far look excellent.

Unfortunately, I had to return home the very next early morning, otherwise they would have shown me these cells and allowed me to witness some flights at the field.

I really hope they will allow me to take home some next time, for me to try in some of my fun electric indoor models !

Best Regards,
Nicolas GODDEERIS,
SpiderJets.



       Post #: 1

RE: Revolutionary Li-Po cells of 5 Amps @ 2.11 ounce on... - 3/22/2005 1:26:53 PM   
Silver182



Posts: 966
Joined: 12/6/2001
From: Denver, CO, USA
Status: offline 		Wow someday an electric turbo Jet unit suppling 30 + pounds of thrust...... almost no throttle lag, realistic sound... the total power package including fuel / LiPo's might weigh as little as 5 lbs the only thing missing would be the heat...times they are changing!
Thanks for the report
Lee

(in reply to SpiderJets)
       Post #: 2

RE: Revolutionary Li-Po cells of 5 Amps @ 2.11 ounce o... - 3/22/2005 1:32:55 PM   
SJN



Posts: 4387
Joined: 9/28/2002
From: Copenhagen, DENMARK
Status: offline 		There is just something more to it ,flying a controled inferno in the sky, than wizzing around on a battery pack

_____________________________

Sonnich Johannesen

(in reply to Silver182)
       Post #: 3

RE: Revolutionary Li-Po cells of 5 Amps @ 2.11 ounce o... - 3/22/2005 2:20:07 PM   
EASYTIGER


 

Posts: 7676
Joined: 12/7/2001
From: nyc, NY, USA
Status: offline
quote:

ORIGINAL: SJN

There is just something more to it ,flying a controled inferno in the sky, than wizzing around on a battery pack


BINGO!

Electric may someday SURPASS internal cumbustion in performance.
But it AIN'T the same thing.
I had been dorking around with electric s for a LOOONG time. I have the original Kyosho AP35, and Aristo motors that used saltwater batteries, hectoperms, early astro ferrites, yadda yadda yadda... electric is okay...but it's not the same as glow, diesel, or turbine.

Engines is engines, and they are part of the fun for many, many modellers. Be it a Ceccarelli .005 diesel or a Jetcat P80, if it turns dead dinosaurs into smoke and noise, I LIKE IT.
And electric s are missing part of the buzz. To each his own!

(in reply to SJN)
       Post #: 4

RE: Revolutionary Li-Po cells of 5 Amps @ 2.11 ounce o... - 3/22/2005 3:40:18 PM   
EddieWeeks



Posts: 1132
Joined: 12/27/2001
From: Baton Rouge, LA, USA
Status: offline 		Do you mean 5 A hour... ?.. or maybe 5000 mah.. ?

Eddie Weeks

(in reply to EASYTIGER)
       Post #: 5

RE: Revolutionary Li-Po cells of 5 Amps @ 2.11 ounce o... - 3/22/2005 4:15:24 PM   
Vincent



Posts: 2648
Joined: 12/7/2001
From: Phoenix, AZ, USA
Status: offline 		Good question Eddie, i was wondering the same thing. Must be 5000ma
Jet noise from an elec?? nah, nothing like a turbine but would much rather listen to an elec prop plane than those 2c bangers.
V..

(in reply to EddieWeeks)
       Post #: 6

RE: Revolutionary Li-Po cells of 5 Amps @ 2.11 ounce o... - 3/23/2005 8:23:53 AM   
SpiderJets



Posts: 852
Joined: 12/26/2001
From: .., BELGIUM
Status: offline
Sorry for not mentioning correctly : yes it is 5000 MAh !

Best Regards,
Nicolas.

(in reply to Vincent)
       Post #: 7

RE: Revolutionary Li-Po cells of 5 Amps @ 2.11 ounce o... - 3/23/2005 1:31:32 PM   
Silver182



Posts: 966
Joined: 12/6/2001
From: Denver, CO, USA
Status: offline
quote:

ORIGINAL: SJN

There is just something more to it ,flying a controled inferno in the sky, than wizzing around on a battery pack


Yep, I agree I like our blow torches to be sure.... but I also welcome new technology. Shoot I still will fly a kite from time to time.
Lee

(in reply to SJN)
       Post #: 8

RE: Revolutionary Li-Po cells of 5 Amps @ 2.11 ounce o... - 3/23/2005 1:42:18 PM   
bcovish



Posts: 1935
Joined: 2/3/2002
From: Austin, TX, USA
Status: offline
quote:

ORIGINAL: Vincent


Jet noise from an elec?? nah, nothing like a turbine .



Also, maybe someone would make air freshner strips that smell like jet-a and we could hang them around our neck.

_____________________________

Bob-O Austin TX
Sticks and stones may break our bones, but words will break our hearts

(in reply to Vincent)
       Post #: 9

RE: Revolutionary Li-Po cells of 5 Amps @ 2.11 ounce o... - 3/23/2005 4:36:04 PM   
Vincent



Posts: 2648
Joined: 12/7/2001
From: Phoenix, AZ, USA
Status: offline 		If there was some way to get a little jet noise out of those DS-51`s i would build another elec AW ME-262 in a second. You can`t beat the dependability of an elec twin.
V..

(in reply to bcovish)
       Post #: 10

Page:   [1]
All Forums >> RC Airplanes >> RC Jets >> Revolutionary Li-Po cells of 5 Amps @ 2.11 ounce only !!!
Page: [1]





Jump to:


Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Member Video Posts | RCU Video Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

© 2001 - 2007 24-7 RC, LLC, all rights reserved.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America

Kaango.com Classifieds

0.625RCU1