Next step up system...

[Jumpy07]

 I would stick to 4s Lipo..  bigger props.. will give you longer flight times. .. 

[guest325]

Googling Y harness brings me up some rather kinky underwear, but I will keep looking.  ::)

http://www.hobbyking.com/hobbyking/store/__10265__XT60_Harness_for_2_Packs_in_Parallel_1pc_.html?strSearch=Parallel

[Richlizard]

I would stick to 4s Lipo..  bigger props.. will give you longer flight times. ..

That';s just it Craig. If you read there page here, it states that for 4s battery, you must use the SMALLER props...

http://www.buildyourowndrone.co.uk/DJI-Flame-Wheel-Propellers-10-p/dji-ps10.htm

Head explode!

[Jumpy07]

That';s just it Craig. If you read there page here, it states that for 4s battery, you must use the SMALLER props...

http://www.buildyourowndrone.co.uk/DJI-Flame-Wheel-Propellers-10-p/dji-ps10.htm

Head explode!

Normally u run lower KV motors, more voltage and bigger props for best flight times..  but tbh there are lots of variables, weight .. pitch of prop etc etc..


A good program to calculate flight times.. MTOW etc etc .... is Ecalc http://www.ecalc.ch/xcoptercalc.htm




I think without doubt for a hex of that size you want 4s lipos.

[Richlizard]

Just what I needed Craig, thanks.

[Richlizard]

Thanks Darrel.

I did a quick search on Ebay as I have lots of 3s batteries and there were both options of ';parallel'; and ';series';, but pretty much identical descriptions. So what';s the difference?

Also, do you think running 2x 3s batteries 2200mah with ten inch props would give better or worse performance than 1x 4s battery at 5,000mah?

Cheers anyone!

http://www.hobbyking.com/hobbyking/store/__10265__XT60_Harness_for_2_Packs_in_Parallel_1pc_.html?strSearch=Parallel

[guest325]

Paralleling 2x3S 2200';s will give you 3S 4400, Series 2x3S 2200';s will give you 6S 2200.
As regards whether to go 3S or 4S I';m not the best person to ask as I don';t run any fpv gear or cameras, I just fly them for something different to fly - I also do really enjoy hooning about with a quad more than a plane, I find them more manoeuvrable.

[Richlizard]

Yea, I sort of get the end result with two batteries, but not why the two types of Y cable connectors were being offered.

Will just remember that as and when I get one, it should be parallel. Ta

[guest325]

Yea, I sort of get the end result with two batteries, but not why the two types of Y cable connectors were being offered.

There are the two types because they are connected differently internally to give you series or parallel connection I.e. series + to - and parallel + to + and - to -

[Richlizard]

There are the two types because they are connected differently internally to give you series or parallel connection I.e. series + to - and parallel + to + and - to -

And what situation would the series be used in?

[guest325]

And what situation would the series be used in?

The only reason for using series connection is if you';ve got a lot 3S but need 6S and don';t want to fork out for the 6S or am uncertain if that';s what is needed - it';s just an easy way to get 6S without buying them. Personally I wouldn';t use them as a permanent measure, I would only use them to trial a configuration; you have more connections so more resistance so less efficient, only marginal if you have good connectors but if they are getting worn your losses could be significant.

[Opto-Mystic]

[attachimg=1]

Hopefully this will assist in determining the difference between ';Series'; and ';Parallel'; connections.

Taking two batteries, Series doubles the voltage and keeps the amperage the same as one. Whereas Parallel doubles the amperage capability but keeps the voltage as one.

[Richlizard]

Taking two batteries, Series doubles the voltage and keeps the amperage the same as one. Whereas Parallel doubles the amperage capability but keeps the voltage as one.

Thanks Donald.

So in fact, if you have massive props you want to use and need very low kv, would it make sense then to have them in series to get more voltage? Or am I a fish out of water here?

[Biffa]

So in fact, if you have massive props you want to use and need very low kv, would it make sense then to have them in series to get more voltage? Or am I a fish out of water here?

That would depend on what voltage the motors are rated at rather than just prop size and motor KV.

Generally speaking for multi rotor use you would want more capacity than voltage, so running packs in parallel is more likely.