Raflex

<span style="font-family: Verdana, Arial; font-size: 13px; background-color: rgb(251, 252, 255);">Hello everybody,</span><br style="font-family: Verdana, Arial; font-size: 13px;" /><br style="font-family: Verdana, Arial; font-size: 13px;" /><span style="font-family: Verdana, Arial; font-size: 13px; background-color: rgb(251, 252, 255);">I'm trying to convert my Hangar 9 extra 260 27% to electric.</span><br style="font-family: Verdana, Arial; font-size: 13px;" /><span style="font-family: Verdana, Arial; font-size: 13px; background-color: rgb(251, 252, 255);">I'm using the HXT 6364 230 kv and with 8s lippo 30c 4000 ma i have 8kgr static thrust.</span><br style="font-family: Verdana, Arial; font-size: 13px;" /><span style="font-family: Verdana, Arial; font-size: 13px; background-color: rgb(251, 252, 255);">Propeller 20x10 Apc.</span><br style="font-family: Verdana, Arial; font-size: 13px;" /><br style="font-family: Verdana, Arial; font-size: 13px;" /><span style="font-family: Verdana, Arial; font-size: 13px; background-color: rgb(251, 252, 255);">I havent flown yet because my CG is about one inche aft of the suggested .</span><br style="font-family: Verdana, Arial; font-size: 13px;" /><span style="font-family: Verdana, Arial; font-size: 13px; background-color: rgb(251, 252, 255);">If anyone can help me on this , this plane can fly safely 3d with this aft cg? or i should stick to the manuals.</span><br style="font-family: Verdana, Arial; font-size: 13px;" /><span style="font-family: Verdana, Arial; font-size: 13px; background-color: rgb(251, 252, 255);">About the deflection rates , shall i follow the manuals or can i use more throws for 3d.</span><br style="font-family: Verdana, Arial; font-size: 13px;" /><br style="font-family: Verdana, Arial; font-size: 13px;" /><span style="font-family: Verdana, Arial; font-size: 13px; background-color: rgb(251, 252, 255);">Iam planning to connect in series the 6s with 2s lipo to get the 8s that is required. Anyone have something to tell me about that?</span><br style="font-family: Verdana, Arial; font-size: 13px;" /><br style="font-family: Verdana, Arial; font-size: 13px;" /><span style="font-family: Verdana, Arial; font-size: 13px; background-color: rgb(251, 252, 255);">Looking forward for your replies</span>

Walt Thyng

My Feedback: (9)

you don't say what the plane weighs, but 8kg thrust is quite a bit. How many amps are you pulling?

After losing a couple of 5 and 6 cell packs (and one 10 cell) all I buy now are two and three cells packs that I series together to get the voltage I need. As a sport flier I cannot detect aany losses.

As far as the c/g and control throws, go with the book for initial flights and put LOTS of expo in. That said, Hangar 9 has the reputation (in my club at least) of having poorly calculated c/gs - usually too far aft, so I wouldn't try to fly with one an inch back of what they say. Personally, on all H9 stuff,I now recalculate the c/g myself.
Walt

Glacier Girl

My Feedback: (4)

I agree with Walt, unless you have the CG set correctly you are probably looking at a very short unhappy maiden.

There are CG calc programs available on the web.

Raflex

First of all thank you very much for your reply.

The plane weights RTF with batteries 6kgr and the thrust i measure is 8 kgr on 91 Amps.
I will keep your advice on CG by adding some weight on the nose and if i see that this cg will be the final i will move the Rudder servo forward.

Concerning the Lipos in series , during my tests i notice that the 2s battery is dropping first. It will be a good idea to use instead 6s4Amp+2s4Amp,
6s4Amp+2s4.5Amp.(well mentioned is that both batteries are the same C rate but different brant)

Thanks.<br type="_moz" />

Walt Thyng

My Feedback: (9)

Being in series is probably not why the 2S pack is dropping first. It is most likely simply the difference between the packs -more cycles, manufacturing tolerances, just a plain old weak pack.
Walt