Archive of the Yahoo! Groups mailing list for the Bug hand-launch glider 2002-2018

From: "tom_yellowblue" <tom_yellowblue@...>
Date: Tuesday, May 27, 2003 11:40 AM
Subject: Re: On lightness, stretched wings and 1/8" CF tailbooms
John, I can't remember the minimum voltage per cell, but I think it is in the range of 2.5-3.0V. The manufacturers would have the info, and I know it has been posted on the Ezone many times. I've never had problem because I usually only use them in planes with electric motors. On a 2-cell pack, the plane will be on the ground before the minimum voltage is reached. I have played around using a single cell for a glider, but I don't have anything special for protection. I calculate about how long I can fly before the voltage will get too low, then I give myself a large margin. I have also heard of people making/selling circuits that will light up an LED when the voltage gets below a certain point. This may not help if the plane is in the air for hours at a time, but it should work if you're constantly hand-launching or can fly the plane close enough to see the LED. Tom --- In BugHLG@yahoogroups.com, "gldrgidr" <gldrgidr@m...> wrote: > > I've heard that these cells are permanetly damaged if you let the > charge go below something like 40%. How do you prevent this? > John