Skywalker 1900......4S....or 3S...???

Ratty · March 03, 2016, 05:01:16 PM

I hope they aren't too bad as I just grabbed one to use for field charging.

AdamG · March 03, 2016, 05:10:37 PM

Quote from: Ratty on March 03, 2016, 05:01:16 PM
I hope they aren't too bad as I just grabbed one to use for field charging.

How?

Ratty · March 03, 2016, 05:12:16 PM

Just plug charger into it.

Only charging small 1000-1300mah batteries so should get 6-8 charges of the 10a battery.

AdamG · March 03, 2016, 05:13:12 PM

Good idea. I assume your charger takes over 12v ok?

Ratty · March 03, 2016, 05:14:19 PM

Yer, I usually run it at 18v. ;D

AdamG · March 03, 2016, 05:31:29 PM

Quote from: Ratty on March 03, 2016, 05:14:19 PM
Yer, I usually run it at 18v. ;D

Good stuff. I have a couple of Accucel 6's, haven't checked what input they can take, will check it out later ;D

Ratty · March 03, 2016, 05:38:21 PM

Yer worth a check. That battery will get me an extra 6-8 flights for the price of 2-3 more battery packs.

Cheap air time. ;D

BlueFlyer · March 03, 2016, 07:12:23 PM

I wouldnt say I had difficulty getting the nose heavy enough... It was built with the intention of having a GoPro on the canopy, so naturally without the GoPro there it was a bit more tail heavy than it is now, still no dramas though.

BlueFlyer · March 03, 2016, 07:12:35 PM

Quote from: wgt40w on March 03, 2016, 10:35:37 AM
Please Note:

A 12 volt BEC regulator will not work with a 3s battery, as the BEC cannot regulate a 12 volt supply from , when battery even fully charged, less than 12 volts.

On a 4s battery - all OK

a fully charged 3S LiPo is 12.6 volts... so the 12v BEC would work fine up until the LiPo dropped below 12v... or am I missing something?

English Turbines · March 03, 2016, 11:39:21 PM

Its a big bird, and I think it will handle the heavier 4S Lipo.....

I didn't think about field charging though...will I need more than a 12V Lead acid to charge a 4S?

We do have two 12V Lead acid batts though in our hut....I think they are wired in series?....Have to check my charger now..

They was cheap though at HK..

:vulture:

Ratty · March 03, 2016, 11:43:52 PM

A single lead acid will charge a 4s fine. ;D

English Turbines · March 03, 2016, 11:54:15 PM

Quote from: Ratty on March 03, 2016, 11:43:52 PM
A single lead acid will charge a 4s fine. ;D

Thanks Ratty..

Oh, I just quickly read my charger Manual, it's an Overlander Charger...It states a DC input max of 18vdc...but says it will do up to 6S...But is that when its on Mains Supply?.....Confused...:(

Anybody else got an opinion?

:vulture:

BlueFlyer · March 04, 2016, 12:23:08 AM

it doesnt matter about the voltage, charging is about capacity.

As long as the 12v lead acid battery has more mah than the LiPo you're charging, it's all good.

But you need a charger in the middle to control the charging process, make sure it doesn't put electrons into your LiPo too fast (current)

FPVSteve · March 04, 2016, 12:23:46 AM

Quote from: Ratty on Today at 22:43:52

A single lead acid will charge a 4s fine. ;D

Is that right? I thought that the 14V lipo battery would try to charge the 12V Pb battery because they'd try to normalise the voltage.

BlueFlyer · March 04, 2016, 12:37:21 AM

Quote from: Steve W on March 04, 2016, 12:23:46 AM
Is that right? I thought that the 14V lipo battery would try to charge the 12V Pb battery because they'd try to normalise the voltage.

which is why you wouldn't just plug them into each other, you power the charger from the 12v pb battery... this then controls the charging process to charge the 4s LiPo.