my New Biplane!

[cdis]

I thought lipo's were good to about 3v? Although not recomended.
2.8v was basically the point where the lipo is stuffed or on its way to stuffed.

In my desert truck, I run the lvc at 3.2v.
I assume it's all the same for both air and surface, same chemistry etc...

The pitts looks nice too by the way.
When I can afford it, I will be looking at getting a mulitplex easy star, been wanting to get a plane for a while.

Remember that the LVC on the speedy operates whether the system is under load or not. So if you have a high load on your system, the battery voltage might sag a little in order to compensate for the higher amp demand. In this case, your resting voltage of the pack might be say 3.6v, but under load it may drop to 3.2v. This is probably a good thing, as it stops the battery getting so low that providing power would damage it. However, if your setup is not as harsh on the battery, then you could actually approach the LVC of 3.2.

That dude that Oblivion linked to is right on the money. Depending on my setup and what vehicle, I set my LVC to right around 3.5v. Usually once my packs start approaching 60-70% used, they start hitting the LVC and I either stop driving or land.
The way I've measured this, is once I land, I check resting voltage, write it down, and and then charge. Once the charge is done, I make a note of the mAh that was put back into the pack.

There are always 2 sides of the story tho. You get guys that are like "LVC? whats that? I just drive till it stops then charge and go again", or others that say, "nahhh 3.2 isn't low enough, go for 3.0 or 2.9... I've been doing it for ages and nothing's happened". Ask those guys if they actually recorded mah replaced, internal reistance betweent the cells, etc etc. 9/10 they didnt.

IF you want your cells to last for a good 300 cycles, then treat em nice, buy a few extra so you don't have to try and squeeze runtime out of em, and run them well within their limits.

IF you want your LiPos to .. well I won't say fail, but if you want them to be un-trustworthy (I don't know if that's the right use of the word), then just abuse em and hopefully you won't see any fireworks .

As for me, my LiPos live in my house (right next to the patio door), they travel to and from places I drive and fly in my car with me and I definitely do not want to have one go pop when its anywhere near me, or in my house, or if I were asleep. Therefore, I treat em realllly nice lol. Otherwise, best to treat em like a naughty dog and store em outside in a metal box

[allanach]

Hey Boys,

Sent the question away to the store and they have excellent communication and kept in contact with me the whole time and below is a cut and paste of the answer about the voltage monitor.

"We have received your email in regard of your inquiries and we’d like very much to help you. However, we are sorry to advise you that we are not trained for technical support or product recommendations."

Read into it as you will but it sounds like it will be fine going from the above..... they only cost like $30 for the batterys so I am tempted to give her a whirl.

[Oblivion]

keep an eye on how many mah it puts back in the pack after every charge and what the final volt reading was.

you should see the volts will probably always come up good but it will feel like it goes flat real quick and you'll notice less mah going in with each charge if your pushing it too low

[Oblivion]

some readings for ya'll with the stock motor + esc and a 1500 3s 20c turnigy pack.


stock 10 x 4.7 SF prop
half throttle: 2.5A @ 31w (now we can see why it feels a bit down on power @ 50% thr )
full throttle (peak) 13.46A @ 158w

Eflite 10 x 7 SF
Half: 3.6A @ 45w
Full (peak) : 17.09A @ 203w (my new choice in prop i think! )

Eflite 11 x 4.7 SF prop
Half: 3.04A @ 39W
Full: 16.98A @193.4W

an 11x4.7 is no good if your always flying with one blade and wiping dirt and grass off it

imagine what happens as the tail rises on take off, and if you dont do perfect 3 point touch downs your screwed! and so is the prop



just flew with the 10x7SF

you gotta give it a try, i now honestly feel this model has the most perfect thrust to weight ratio.
a little extra speed, good strong vertical climbing power.
it went straight up, it wasnt rocketting straight up but it had a good vert climb rate.

very impressed with this plane now, it cruised with the greatest of ease at 30-40% throttle now.

vid to come

[Oblivion]

http://www.youtube.com/watch?v=rX5PIgoe01o