How may Lipo cells do I need for my setup ...4S or 6S??

J

Jake

Member
Hi guys,

I'm hoping i can tap into your knowledge. I've built a hex with the following spec:

x650 Carboncore
Leg set
Tiger motor MN3508-16 (700)
12 x 6.5 carbon props
Wookong-M etc.

Now, at the moment i only have a bunch of 3S 6000 mAh lipos from when i had my quad. After building the hex, i thought i'd give it a test flight with the 3S lipos. Before takeoff, with 2 of them strapped to the quad in parallel, the all up weight was 3.8 Kgs.

Needless to say, the quad struggled to gain any altitude - which to be fair i had expected i just wanted to get the thing airborne.

So i'm now i the market for some new batteries, my question is: will 4S batteries be powerful enough given the spec and weight. My problem is that i can't go for 6S as my ESCs don't support 6S, and I really don't want to go down the route of stripping everything down and starting again.

Will 4S be OK in your opinions?

Thanks
 


E

Electro 2

Member
8.3 pounds for a 650 ?? Ouch! A diet may be in order first. And to give the 3 cell pack a run-up with various props, too, as you don't know that your were optimally prop'ed the first test.
 


soler

soler

Member
Those motors are 700KV and I doubt if they will run on a 6S, I tried some 530KV motors on a 6S system and it did not like it, it seamed to miss sequence some how. I would go for a 4S system and you should be fine.
 

flitelab

flitelab

Member
With that kv probably going to need to go with 4S. They do support 6S but going to take a smaller prop to do so or they may run hot.
 

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