X5 FES what 6s will yield perfect CG.

[Shawn Behrens]

I am considering getting an x5 and would like to know what battery weight (grams) will yield a perfect CG. This is with canopy on. I have some 6s 4000 and 4400s which weigh 611 grams and 677 grams respectively and I was hoping these batteries would give me good neutral CG.

Thank you
shawn

[fusionsx00]

Too many variables, main blades tail blades, servos, landing gear

On mine, the hyperion 35c 4200mah make it perfect

[Shawn Behrens]

Um main blades effect CG how? If 4200s give you good CG I should be close I guess.

Thank you

[akamullen]

Its not how many mah, its the pack weight, 4200 packs can range from around 590 to 700 grams depending on brand and C rating. I have noticed that Turnigy packs are among the heaviest packs, so I steer clear of them. My X5 seems to like 600-625 grams for good CG, but you can move the esc around as well as other electronics to help get perfect CG depending on pack weight.

[fusionsx00]

yeah its not that hard, really never thought about it

[gbidwell]

If your talking about stock setup then I can't help you with that one. You can always move your electronics around OR use lead weights.

I have a flybarred version with CC100 ESC and CC BEC pro mounted up front, with a BLS 254 tail servo, KBDD tail blades, Futaba GY520 ( stock Gyro location) and futaba 7ch receiver (stock location), hyperion EX 4200 (674g rated weight, not actual..actual will be heavier) and canomod dragonous canopy. These parts are the main players in effecting CG. cyclic servos are of no real concern...centered around the main shaft.

With all of these parts installed I still had to add 40g of lead on the tail. The way I mounted the ESC inbetween the frames, there was no opportunity to move its location for CG adjustment. I could have moved the CC BEC pro behind the main shaft, but I doubt it would have done much to counter the nose heavy tendency. 40g of weight at the end of the boom has a great lever arm effect, I vaguly remember equating it at the time to be 120g nose heavy. But fat chance I was going to find a 4200 45C 550g pack that was also top quality AND short enough to fit in front of the battery fence.

Saved 20g yesterday with new main blades...so I have removed half the added dead weight now!

[Rob Cherry]

Also depends on how much cg you mind giving up. None of my helis are spot on, but I still fly the smack out of them without any issue. Vbar and beastx handle unbalanced helis just fine. To me, certainly adding dead weight would never be an option, I'd rather have a little off balance than add more weight.

[Chris Sexton]

Originally Posted by fusionsx00

Too many variables, main blades tail blades, servos, landing gear

On mine, the hyperion 35c 4200mah make it perfect

+1 my hyperion VX G3 4200 35C packs balace perfectly with my new Gaui 520 FBL mains and KBDD Extreme 84.5mm tail blades.

I also have 1 of the Spider 4000mah 30c packs, it doesn't seem to balance any worse.

[irishmatt18]

Gens Ace 4000 MAH 25c....
AWESOME batteries. Very good with balance and Battery stop.

[Shawn Behrens]

Thanks Matt,

The gens ace 6s 25c 4000 batteries are what I have on hand. It doesn't matter much though as the weekend/black Friday sales just were not enticing enough this time for me to pick up a Gaui x5. The info was greatly appreciated guys.

shawn