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

English Turbines · March 03, 2016, 09:30:46 AM

My new Skywalker 1900 is now on build...Having sorted out the UHF receiver for "Muxed" mode, it's now all working as it should with the Cyclops Storm AP.

I'm going to be using a 35mm 1200KV Turnigy G10 Motor.

I will be using a 12vdc BEC regulator to provide smooth clean power for the Storm and Video system, so I can use either a 3S or a 4S Lipo for power.

It's a large plane, and I'm thinking a single large capacity 4S Lipo would be a wise choice, say about 8000mah? Not looking for out and out performance, just a good cruising match for motor and Prop. Keeping the build very simple and low drag, but I'm considering clipping the wings maybe later if its too slow?

Suggestions please on the Lipo and also a suitable size prop for this motor?

Cheers..

:vulture:

AdamG · March 03, 2016, 09:40:06 AM

I run mine on 4S and it feels just right. I haven't tried it on 3S but I've heard others say it feels a bit under powered. Is there any benefit to going 3S considering you already have your 12v UBEC in place???

Oh and I carry 10,000mah

English Turbines · March 03, 2016, 10:08:53 AM

Quote from: AdamG on March 03, 2016, 09:40:06 AM
I run mine on 4S and it feels just right. I haven't tried it on 3S but I've heard others say it feels a bit under powered. Is there any benefit to going 3S considering you already have your 12v UBEC in place???

Oh and I carry 10,000mah

Hi Adam,
No, it's just that I have a few 3S Lipos I could parallel together that's all.....but thinking about it, buying a couple of decent 4S Lipos seems more sensible....I assume you are using two 5000,s?

:vulture:

AdamG · March 03, 2016, 10:28:27 AM

Makes sense, always nice to use LiPo's you already have.

Yeah I have 5 x 4S 5000's 25c. I use them in my SW, on my F450, and will also be using them on my Skyhunter.

FPVSteve · March 03, 2016, 10:31:44 AM

They do fly well on 3s but if you want to climb at any reasonable speed, especially with weight onboard then forget it. It feels like a 4s plane to me. The FPV Raptor was the same (well, worse :laugh:) .. on 3s it was a nice cruiser, but 4s really turned it into a fully fledged version of itself.

wgt40w · 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

English Turbines · March 03, 2016, 12:40:35 PM

Thanx for all your input guys, I have ordered 2 x 4S Lipos...10000mah.

Cheap at £22 each for a 10,000 4S Lipo....Multistar green ones.

After reading Blue flyers build notes, he had difficulty making it nose heavy enough. Since I wont be using a heavy GoPro etc, it seems a logical choice now. Going to keep it light and simple and as drag free as possible.

:vulture:

FPVSteve · March 03, 2016, 12:47:47 PM

What's the URL for those lipos? I have one but they went back up to £39

keukpa · March 03, 2016, 01:09:53 PM

Yeah the multistar ones are great for this plane.

I currently use 1x5000 mAh 4S and 1x2200 3S in my skywalker

Keukpa

AdamG · March 03, 2016, 01:58:50 PM

Quote from: English Turbines on March 03, 2016, 12:40:35 PM
Thanx for all your input guys, I have ordered 2 x 4S Lipos...10000mah.

Cheap at £22 each for a 10,000 4S Lipo....Multistar green ones.

After reading Blue flyers build notes, he had difficulty making it nose heavy enough. Since I wont be using a heavy GoPro etc, it seems a logical choice now. Going to keep it light and simple and as drag free as possible.

:vulture:

Good choice ;)

English Turbines · March 03, 2016, 02:25:50 PM

Multistar.....10,000mah 4S Lipos....Find it here....£21.80p each:

https://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=64794

Dunno how good they are, but if your just cruisin around?

:vulture:

AdamG · March 03, 2016, 02:40:14 PM

Quote from: English Turbines on March 03, 2016, 02:25:50 PM
Multistar.....10,000mah 4S Lipos....Find it here....£21.80p each:

https://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=64794

Dunno how good they are, but if your just cruisin around?

:vulture:

Thats mad cheap prices!!! :o :o :o was £42!!!

It will be perfect. 10amp at 10c = 10x10=100. So you can pull 100 amps according to its stated c rating, you wont even pull half of that, my max is about 43 amps on WOT :D

FPVSteve · March 03, 2016, 02:47:26 PM

They are very good for a 5-10A cruise but the voltage sags a little when pulling more, I'm on just over 40A as well at full chat

English Turbines · March 03, 2016, 02:54:05 PM

Quote from: Steve W on March 03, 2016, 02:47:26 PM
They are very good for a 5-10A cruise but the voltage sags a little when pulling more, I'm on just over 40A as well at full chat

I'm using a 60 amp ESC with a 4 amp BEC....Im pleased these are rated high enough, never did understand that C rating...
I don't think my modest 1200kv Turnigy G10 will be a problem for it.

Anyway, the Lady at HK UK said my two were the last of the stock...lol....Only kidding...:)

They did seem a bit cheap at the time, so I bought em....maybe its a Sale?

:vulture:

dogzilla · March 03, 2016, 03:31:03 PM

4S definitely. Skywalker flys best heavy and with lots of power in my opinion.

And those packs are cheap because.... well they ain't that good. OK budget lipos.

I bought a bunch last year at similar slashed prices. One of them decided to become a 3S pack when one of the cells just completely died and the other two have pretty badly matched cells.