RunRyder RC
 6  Topic Subscribe
WATCH
 1 page 1056 views POST REPLY
HomeAircraftHelicopterRadio - Futaba FASST › Using Lipo in Tx?
12-29-2010 01:26 AM  7 years agoPost 1
bustedmp

rrVeteran

Shamokin, PA

My Posts: All  Forum  Topic

I was browsing a few budget online shops and ran across a 2600mah 3s lipo that will fit in place of standard sq 9.6v nicd pack. My question is how many volts can a futaba 7c 2.4ghz tx handle. A fully charged 3s lipo would have 12.6v, would that hurt the tx? I full charged nicd would bein the 11 to 12v range.

The world is yours!

PM  EMAIL  GALLERY  Attn:RR  Quote
12-29-2010 02:18 AM  7 years agoPost 2
Zaneman007

rrElite Veteran

Texas - USA

My Posts: All  Forum  Topic

Just run two diodes in line with the lipo, that will drop the voltage from 12.6 to 11.2.

I find that unless the battery is brand spanking new. The Max voltage from the lipo is more like 12.4 drop that with two diodes and you have 11 volts.

My radio reads a max of 11.1v using two diodes and quickly drops to 11.0 volts.

Old Guys Rule!

PM  EMAIL  GALLERY  Attn:RR  Quote
12-29-2010 02:22 AM  7 years agoPost 3
Steff Giguere

rrProfessor

St-Eustache, Quebec, Canada

My Posts: All  Forum  Topic

I used a 3S lipo in my 10C for almost 2 years, no problems.

Team Synergy, Rail blades, Team Scorpion, V-Team

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-29-2010 02:31 AM  7 years agoPost 4
bustedmp

rrVeteran

Shamokin, PA

My Posts: All  Forum  Topic

I found a lifepo that has a pretty good mah rating also, i think that would be better anyway.

The world is yours!

PM  EMAIL  GALLERY  Attn:RR  Quote
12-29-2010 07:30 PM  7 years agoPost 5
Alpine

rrVeteran

Lexington, Ky

My Posts: All  Forum  Topic

Like Steff , I have used a 3cell Lipo in my Futaba 10C for three years.

Roberto Munoz
IRCHA #344

PM  EMAIL  GALLERY  Attn:RR  Quote
12-30-2010 06:51 AM  7 years agoPost 6
bustedmp

rrVeteran

Shamokin, PA

My Posts: All  Forum  Topic

Well, I have a 3s 2600mah lipo that will be here friday. What is the point of using tiny 600mah packs in computer radios anyway. I can see it in a std 4ch non comp unit, but in anything 6ch and up theu really should supply a higher capacity battery. I have just over 6hrs of use on my 7c and have charged the battery 7 times now. WTH?

The world is yours!

PM  EMAIL  GALLERY  Attn:RR  Quote
12-30-2010 01:49 PM  7 years agoPost 7
kcordell

rrElite Veteran

O Fallon, MO

My Posts: All  Forum  Topic

One of the issues (actually non issue) not discussed is the fact that 2.4 TX's use less power than 72mhz TX's. I was worried about he same charging issue when I got my first 2.4 system, Futaba 6EX, and after the initial dropdown from 11 to about 10 volts, it seemed to last quite a while after that.

Team Futaba, Team Synergy/Rail, Team Scorpion, Team Castle Creations, YS Engines, VelTye

PM  EMAIL  GALLERY  Attn:RR  Quote
12-30-2010 03:52 PM  7 years agoPost 8
Four Stroker

rrElite Veteran

Atlanta

My Posts: All  Forum  Topic

Looks like the 9.9V LiFe batteries are ideal as replacements for NiCD.

PM  EMAIL  GALLERY  Attn:RR  Quote
12-30-2010 10:50 PM  7 years agoPost 9
JeffKollin

rrKey Veteran

Jenison, MI

My Posts: All  Forum  Topic

I use a 2500mah lipo pack in my 7C and it does not affect the radio at all, well at least not after running for the last 2 years. The voltage will drop down after a few minuts and stable out to around 11.1v

PM  EMAIL  GALLERY  Attn:RR  Quote
12-31-2010 02:03 PM  7 years agoPost 10
Blademan

rrVeteran

Morehead, KY

My Posts: All  Forum  Topic

I use a 2600 mah lipo in my 10C. No dieodes, has worked great for over 2 years now. At full charge the meeter reads 12.6 volts, but drops quickly to 12.4.

CHP

PM  EMAIL  GALLERY  Attn:RR  Quote
12-31-2010 05:57 PM  7 years agoPost 11
bustedmp

rrVeteran

Shamokin, PA

My Posts: All  Forum  Topic

After charging my nicd pack the meter reads 11.8v. Even a storage charge on the lipo would be plenty to run the radio for a few hours.

The world is yours!

PM  EMAIL  GALLERY  Attn:RR  Quote
01-01-2011 04:14 PM  7 years agoPost 12
iskoos

rrKey Veteran

Orlando, FL

My Posts: All  Forum  Topic

The voltage will drop down after a few minuts and stable out to around 11.1v
Are you really serious? What 3s lipo are you using that stables out at 11.1v after a few minutes????

11.1v reading 3s lipo in a Tx shows nearly depleted pack...

Okay it is under a load when in a Tx but the load from a Tx is very minimal. There is no way it will bring the 3s lipo down to its minimal voltage in a few minutes unless the lipo pack is long gone or not charged at all...

My 3s pack gets down to 11.1 after several hours of use...

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 1056 views POST REPLY
HomeAircraftHelicopterRadio - Futaba FASST › Using Lipo in Tx?
 Print TOPIC  Make Suggestion 

 6  Topic Subscribe

Saturday, June 23 - 5:26 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online