Questions and Answers If you have general RC questions or answers discuss it here.

Minimum reciever voltage?

Reply

Old 09-09-2010, 08:27 PM
  #1  
1wrangler
Junior Member
Thread Starter
My Feedback: (1)
 
Join Date: Apr 2010
Location: St. Cloud, MN
Posts: 19
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Minimum reciever voltage?

I just recieved my fancy new 6 volt reciever battery and I am wondering at what voltage Ishould stop flying. My voltmeter has a "green" (safe) range from 4.8 to 5.7 volts. With my 4.8 volt pack, I fly until 4.8 is indicated with the volt meter. Is it the same with this new 6 volt? BTW, I am running Futaba Faast 2.4. Thanks!
1wrangler is offline  
Reply With Quote
Old 09-09-2010, 08:30 PM
  #2  
DMcQuinn
My Feedback: (13)
 
Join Date: Jan 2002
Location: Chesterfield, MO
Posts: 1,857
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Minimum reciever voltage?

If you stop flying at 6.0 volts you will be very, very safe. A good condition 5-cell battery (NiMh) will probably hit 6.0 volts when it is about half used up. So you'll have a big safety margin.
DMcQuinn is offline  
Reply With Quote
Old 09-09-2010, 08:41 PM
  #3  
1wrangler
Junior Member
Thread Starter
My Feedback: (1)
 
Join Date: Apr 2010
Location: St. Cloud, MN
Posts: 19
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Minimum reciever voltage?

Hmm, I guess what I'm asking is: would it be bad to run this 6 volt battery down to 5 volts before calling it quits?
1wrangler is offline  
Reply With Quote
Old 09-09-2010, 09:10 PM
  #4  
Gray Beard
My Feedback: (-1)
 
Join Date: Apr 2003
Location: Hemderson, NV
Posts: 14,380
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Minimum reciever voltage?

I have never tried to see how far down it would go but I have been known to get them at 5.2 without crashing.
Gray Beard is offline  
Reply With Quote
Old 09-09-2010, 09:16 PM
  #5  
1wrangler
Junior Member
Thread Starter
My Feedback: (1)
 
Join Date: Apr 2010
Location: St. Cloud, MN
Posts: 19
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Minimum reciever voltage?

Got it, thanks guys!
1wrangler is offline  
Reply With Quote
Old 09-10-2010, 05:36 AM
  #6  
bkdavy
Senior Member
My Feedback: (1)
 
bkdavy's Avatar
 
Join Date: Sep 2004
Location: FrederickMD
Posts: 2,114
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Minimum reciever voltage?

A good rule of thumb to follow with Nickel (Nimh or NiCd) is 1.1 volts /cell is fully discharged. With a 6 volt battery, there are 5 cells.

The typical discharge curve for these batteries has a fully charged voltage of about 1.45 volts/cell, which quickly drops down to around 1.25 volts per cell while using. They then discharge fairly linearly down to about 1.15 volts/cell . After that they drop quickly. If you discharge a 5 cell battery down to 5 volts, you're going below the normal fully discharged curve. Depending on your current draw, you may pull it down below 3 volts in flight and your reciever will cease to function. Your "time to quit" voltage with a 6 volt battery should be around 5.7-5.8 volts.

The voltwatch your using is for a 4 cell pack. You should replace it with one designed for the 5 cell (6 volt) battery.

Brad
bkdavy is offline  
Reply With Quote
Old 09-11-2010, 09:27 AM
  #7  
Roo Man
Senior Member
My Feedback: (1)
 
Roo Man's Avatar
 
Join Date: Mar 2008
Location: Lakeland FL
Posts: 561
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Minimum reciever voltage?

Is the voltage you refer to, with load or without?

Gary
Roo Man is offline  
Reply With Quote
Old 09-11-2010, 09:44 AM
  #8  
LesUyeda
Banned
 
Join Date: Oct 2002
Location: San Diego, CA
Posts: 2,670
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Minimum reciever voltage?

With load. Without load, the cells will very rapidly return to normal voltage.

Les

p.s. And exercise the servos while you are doing it.
LesUyeda is offline  
Reply With Quote
Old 09-11-2010, 09:51 AM
  #9  
Roo Man
Senior Member
My Feedback: (1)
 
Roo Man's Avatar
 
Join Date: Mar 2008
Location: Lakeland FL
Posts: 561
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Minimum reciever voltage?

Thanks,

Gary
Roo Man is offline  
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service