How many lipos do you have?!

[ViperTech]

Knacknor, I know what you mean, I am 47 and I have 1 son at home and he's 21 and he kind of does his own thing with working and going to college and my two oldest are married and my daughter gave us 2 beautiful grandkids. My wife doesn't mind me having a hobby................ just spending money on it! LOL

RCwingman, Ok here ya go! I count 76 total plus 2 regulated power supplies 2 IMAX B-6 chargers and another field charger that can handle 2 batteries at a time, I forget the name on it.

4s
2200 (2)

3s
2200 (15)
1800 (13)
1500 (4)
1300 (9)
1000 (7)
600 (2)
500 (2)

2s
2200 (4)
1000 (1)
700 (3)
500 (7)
300 (2)

1s
750 (3)
500 (2)

 

[kacknor]

I've a VenomPro Dual on the bench and took a chance on this little iSDY SC-608 for the field. It works great so far. Small (Tiny) and easy, yet has the power to charge fast. Comes with nothing. Have to build your own cables, or use what you have.

I still have a ton of batteries. Maybe I'll do a count... Someday. It's build season!

JD

 

[rcwingman]

Knacknor, I know what you mean, I am 47 and I have 1 son at home and he's 21 and he kind of does his own thing with working and going to college and my two oldest are married and my daughter gave us 2 beautiful grandkids. My wife doesn't mind me having a hobby................ just spending money on it! LOL

RCwingman, Ok here ya go! I count 76 total plus 2 regulated power supplies 2 IMAX B-6 chargers and another field charger that can handle 2 batteries at a time, I forget the name on it.

4s
2200 (2)

3s
2200 (15)
1800 (13)
1500 (4)
1300 (9)
1000 (7)
600 (2)
500 (2)

2s
2200 (4)
1000 (1)
700 (3)
500 (7)
300 (2)

1s
750 (3)
500 (2)

wow ViperTech thats a huge treasure. JACKPOT! Thanks for counting your lipos. Based on my theory, your RC addiction level is extremely high.

The iSDT SC-608 is intersting. Could be a great addon for my Turnigy reactor chargers.

Two more and I can make some statistics guys....

 

[DonC52]

I am fairly new ti the hobby but do have some older LiPos for small Helicopters I fly in the house.
Here we go:

4s
2200 (4)

3s
1800 (4)

2s
1000 (2)

1s
Various (5)

As for the wife. If I keep the credit card bill for each month pretty level I am OK but if I get carried away in one month I will probably have some explaining to do. Starting up in this hobby could have a negative effect on your happy home-life if you are not careful:black_eyed:. I am just glad that I have found FT and the swappables:applause:. They will keep me happy with an acceptable spend, I hope.
DonC52

 

[BridgeInspector]

This was in January, I have added about 12 more.


The addiction is real and contagious.

 

[rcwingman]

Wow, thanks.
OKOK... I will feed the information into a excel sheet this evening and post some statistics...

Are you happy with the B-Grade batteries BridgeInspector?
How big is the internal resistance per cell?

 

[BridgeInspector]

Wow, thanks.
OKOK... I will feed the information into a excel sheet this evening and post some statistics...

Are you happy with the B-Grade batteries BridgeInspector?
How big is the internal resistance per cell?

I only have a few,as they where cheap and it didn't add to the shipping cost to add them to the cart. They are fine for low amp draw applications, like powering USB chargers, 12v hot glue gun and goggles. I don't have a way to measure IR, yet, but assume that they have high IR numbers and is why they are B grade.

 

[CrossedUpChris]

Why use 3s when I can use 4s?

You guys have some pretty sweet collections going.
I was going to start a new thread about this but thought I would ask in here. Nearly all of my batteries are 4s. I see a few planes recommend 3s setups and I'm just wondering why. I am an electrical engineer so I understand all aspects of voltage, current, capacity etc.
In my mind there are so many benefits of running a 4s over 3s. Mainly that for any given power, the current draw on the battery is is significantly lower.
There is a Wight penalty but, again to get equivalent power a lower C rating is required which negates this somewhat.

I want to build a new plane (rc powers f18) and I'm weighing up whether to use a 1900kv overlander on 4s that i already have, and may just order another battery for, or get a recommended 2200 kv motor that runs on 3s.

Can anyone enlighten me on why people tend to generally run 3s batteries?

Thanks

 

[ViperTech]

Well when you have a motor setup rated at a 3s if you use a 4s battery you are going to overheat the motor and esc.
A motor rated at 1400 kv paired with a 8x4 prop and a maximum amp rating of say 25 amps on 3s "12 volts" cranks the prop at 16800 rpm. Where the 4s at 15 volts 21000 rpm.
Remember the kv is rpm per volt. So an increase in rpm adds load because the prop numbers are like gears in a transmission. The 8x4 prop of course the 8 is diameter but the 4 is the pitch and in a perfect world the prop will move forward 4 inches in 1 revolution. So 3s 16800 rpm x 4 inches= about 5600 feet forward and the 4s=7000 feet. so the motor will be working harder.
Now you can get away with it if you prop down
I am not the expert on this as diameter is a big factor in the calculation in this also but I think you can see why folks run a 3s set up vs the 4s set up.
Along with weight savings and cost and most FT planes lack space for a 4s set up too.

****The battery volts are rounded up and the motor set up is just an example*****

 

[CrossedUpChris]

Yeah I get what you mean and I'm aware of how kv works. I've always steered towards a lower KV motor (partly because of availability) with a smaller esc and 4s as opposed to higher KV, larger esc and smaller 3s batteries.

I guess the main reason to stick with a higher kv motor and 3s is cost and packaging and build with a higher amperage in mind.

 

[rcwingman]

So here are some statistics.

ViperTech is the LIPO-King with 76 batteries.

Its hard to say how much "kacknor" has.
We have 288 lipos so far total.
The average Flite-Test, fan-dude-pilot-forum-guy has 29 Lipos.
The most used size is 3s, followed by 1s.
That means the trend goes toward microquads or super light planes.
Surprisingly 4s is being less important than I expected.





Total based on Size



User total lipos

User total based on size

 

[kacknor]

OK, I know I said tomorrow but it bugged me and SWMBO got the shower first. So...

No 4s here either, but I'm looking at faster posibilities so maybe soon? As I've noted elsewhere I've begun to accomodate field charging. I bring less and as they die, puff or get old I'll not replace them so easily. As expected, I have more of those fitting the planes I've been flying this summer. The 3s 1.3 and 1.8, and 2.2 particularly. Lot's of overlaping in that group. 1.8 for 1.3, 1.8 for 2.2, and 2.2 for the 3.0.

I need to get more UMX stuff. I have more batteries than I have aircraft to use them. First indoor flying is in three days. Got's to do preflights!

1 Cell Packs

75-250 mAh - 13
400-500 mAh - 4

2 Cell Packs

300 mAh – 6
500 mAh - 3
800-900 mAh – 5
1.0 Ah – 2
1.3 Ah – 2
1.5 Ah – 2

3 Cell Packs

450 mAh - 4
800 mAh – 1
1.0 Ah – 4
1.3 Ah – 7
1.8 Ah – 10
2.2 Ah – 8
3.0 Ah – 2

Total = 73? Yikes.

JD

 

[nhk750]

Qty 2 Turnigy 2200-40c, 3s
Qty 2 Turnigy Nano-tech 2650-35c, 3s
Qty 2 Turnigy 1000-20c, 3s
Qty 1 150, 2s

Based on your theory I am irrevocably doomed to enjoy this for about a lifetime.

View attachment 78418

That's not even all of them! Most...

Full disclosure: The 6 2200's on the floor are good and fairly puffed from my overly aggressive sticks in a Durafly Tundra. 40c just don't hack it with that thing. They are destined to become a 6s equivalent 13,000 mAh low amperage portable field recharging station.

JD

What are you recommending for the Tundra?
So far I haven't flown it yet, but have the Nanotech 2650-35c and standard Turnigy 2200-40c batteries to use. I like the 2200-40c because its only $20 and seems to hold up well. Haven't tried the 2650-35c yet (still in the box) but do see guys using them in 3D planes. I use the 2200-40c in the Storch and its great!

 

[kacknor]

Qty 2 Turnigy 2200-40c, 3s
Qty 2 Turnigy Nano-tech 2650-35c, 3s
Qty 2 Turnigy 1000-20c, 3s
Qty 1 150, 2s

What are you recommending for the Tundra?
So far I haven't flown it yet, but have the Nanotech 2650-35c and standard Turnigy 2200-40c batteries to use. I like the 2200-40c because its only $20 and seems to hold up well. Haven't tried the 2650-35c yet (still in the box) but do see guys using them in 3D planes. I use the 2200-40c in the Storch and its great!

Well I've since found out that the Tundra may not be at fault. Seems that the series of Turnigy 40-50c batteries are known for puffing. Unfortunately I have 5 of them. All are puffed. I also have 2 25-35cc that are slightly better, and a 60-120 that I haven't used yet. I've used all (save the one) in the Tundra, a Radian XL and a Polaris SE. The Tundra hits them hardest. The XL has an upgraded AXi motor but I only run it 30 seconds at a time. I got 2 Thunder Power 3s 1800 70c with a Pulsar glider and really like them. Found three more at a very good price while trolling the RC Groups Classifieds. Have not flown any in the Tundra yet.

JD