RunRyder RC
 4  Topic Subscribe
WATCH
 1 page 464 views
Helicopter
e-
Blade
Other › Lipo Noob
01-26-2007 04:04 AM  10 years agoPost 1
jmc67

rrApprentice

Dutchess County, NY

My Posts: All  Forum  Topic

Hello all,

I just recently got 2 3-cell 800mah eflite lipos for my bcp. After running one of the batteries on my bcp, the battery was warmer to the touch. Now I only ran the heli for about 1-2 minutes. Is this normal for the pack to get this warm after 1-2 minutes? This was mostly hovering. I also am running a brushless setup on the main with a dd tail motor and all separates. The main is the eflite 370 4100kv and the esc is the cc thunderbird-18. Blades are syms.

PM  EMAIL  Attn:RR  Quote
01-26-2007 04:36 AM  10 years agoPost 2
Gino CP

rrKey Veteran

Philippines

My Posts: All  Forum  Topic

What pinion are you using?

PM  EMAIL  Attn:RR  Quote
01-26-2007 04:47 AM  10 years agoPost 3
Stealth_T-REX

rrNovice

USA

My Posts: All  Forum  Topic

Any batttery pack will get warm to the touch after discharging.

If its gets to hot then you have a problem.

I'm not sure what the max temp is on those packs.

Is there any way you can read temp of the packs, do you have a temp gun?

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-26-2007 04:59 AM  10 years agoPost 4
Gino CP

rrKey Veteran

Philippines

My Posts: All  Forum  Topic

For the batteries, if it is too hot to touch, something is wrong.

PM  EMAIL  Attn:RR  Quote
01-26-2007 06:27 AM  10 years agoPost 5
jmc67

rrApprentice

Dutchess County, NY

My Posts: All  Forum  Topic

Don't have a temp gun but will use the temp probe from my other charger after flight. The pinion I am using is a 9t

PM  EMAIL  Attn:RR  Quote
01-26-2007 02:12 PM  10 years agoPost 6
astroflyer

rrApprentice

Milford, Nova Scotia, Canada

My Posts: All  Forum  Topic

There are lipos and then there are lipos.

what C rating is that efite pack? for that hot a motor your 800 mah packs should be 15C at least. probably the eflite packs are not.

I have not seen a 3 cell eflite 800, but the 2 cell 800's used in the CX heli are not a very high C rating and would not handle current needs of that hot a motor.

so if it's getting hot in a couple of minutes it's working pretty hard. it would be normal to get hot after a 6-8 minute flight, but not two minutes.

The people at FMA direct have done studies and note that for every degree over 140, a lipo loses one life cycle. so for instance if a pack ended at 150 degrees, that'd be 10 less times it'd be able to hold a charge.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-26-2007 03:27 PM  10 years agoPost 7
Stealth_T-REX

rrNovice

USA

My Posts: All  Forum  Topic

the e-flite pack is rated at
Maximum Continuous Discharge : 10C
Maximum Burst Discharge : 12.5C
You also might want to check your gear mesh, make sure there not to tight together. This also will put alot of strain on the pack and motor.

I think you are fine as long as there not getting overly hot.
You should invest in a temp gun though, trying to read the temparture on probe isn't going to give you that accurate of a reading. Considering it will drop a few degrees by the time you can check it.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-26-2007 03:32 PM  10 years agoPost 8
slider46

rrProfessor

Ocala Florida

My Posts: All  Forum  Topic

If it is a 10C rating your probably using most of that hovering especially with that motor DN has some 15-18C packs but your going to be in the 1350 mah range with them....

Tom..... No "D" flying....

PM  EMAIL  GALLERY  Attn:RR  Quote
01-26-2007 03:40 PM  10 years agoPost 9
Stealth_T-REX

rrNovice

USA

My Posts: All  Forum  Topic

slider46 is right, you should look into getting some higher C rated packs to run the brushless setup.

You could sell the new e-flite packs here on runryder and invest the money into some thunder powers.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-26-2007 05:14 PM  10 years agoPost 10
jmc67

rrApprentice

Dutchess County, NY

My Posts: All  Forum  Topic

This is the battery which is recommended for the brushless setup. Gear mesh is perfect.

PM  EMAIL  Attn:RR  Quote
01-26-2007 05:44 PM  10 years agoPost 11
vsnyder8

rrVeteran

Ft Wayne, IN

My Posts: All  Forum  Topic

Where do you get a temp gun and how much are they?

PM  EMAIL  Attn:RR  Quote
01-26-2007 05:50 PM  10 years agoPost 12
Funky Trex

rrElite Veteran

Westerville, OH - USA

My Posts: All  Forum  Topic

I have been running that same setup for a while (370 4100kv/DD tail/G90)and have no problems. Batteries get pretty warm after a flight but not really hot. Those 800s are my favorite batteries that I have used for my Blade. As long as you don't have any binding and your gear mesh is good you shouldn't have any problems with that setup. I have around 80 cycles on my E-Flite 800s and they still work like new.

FYI... If you drained the battery too much in the past and damaged a cell it will get much hotter than normal. I did this with 2 Thunder Power 2100s when I was learning and if I try to fly with them in my Rex they get much hotter than my other batteries.

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 464 views
Helicopter
e-
Blade
Other › Lipo Noob
 Print TOPIC  Make Suggestion 

 4  Topic Subscribe

Monday, December 11 - 7:43 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online