Receiver battery size / BEC question for HV Align servos

[theonlygk]

Hi

I was wondering how people are powering there HV servo's via 2s lipo or BEC

what size 2s battery's are people using successfully with HV setups especially Align 815HV servo's along with Align HV855 servo.

And how many flights for specific battery size.

OR

if people are successfully using a BEC,

I am in one model I bought but its an expensive one its an HV2 BEC and the cheapest I can find another is 139 Euro's plus post so looking for good alternatives.


Thanks in advance

[Mike Sanders]

I use a Turnigy 2s, 2200 mah in my 700. I fly pretty gently so one lasts me all day. I take a spare just in case.

I think that this is the cheapest option. (Unless you want to spend a lot of time charging smaller batteries).

[A.W]

In my goblin 600 using those exact servos I use a 1600 mah 2s lipo. I'm getting about 5 flights from it at most, but I usually keep it to 4.

I like using a lipo for the electronics, keeps it nice and simple for me.

[10x]

I am using a life battery for my heli with the Align 815/855.
A123 Battery Pack 2 Series 2500mAh

[p1andy]

Optipower 2150 2s and i limit it to 8 flights on the 700 dominator

[trillian]

One of my gassers is using BL700H's on the swash and an HV tail servo and I power it with either a 2s 2200mah LiPo or more frequently with a 3000mah LiFe pack. I have several of the same RX packs so I don't try to get the max amount of flights but I can easily get 3 or 4 flights per pack with plenty left.

The other gasser has AceRC DS1015s on the swash and I only use the LiFe packs on it.

I have an Opti-guard on both helis as well.

[CromedCm]

I am running them servos on my 700 using a Castle Creations BEC PRO at 7.5v. Works great for me!

I also have a friend who runs the same setup only with a 2s 2200mah lipo, i think he gets around 4-5 flights on it but i am not certain.

Both options work great just depends if you don't mind charging up a receiver pack.

[theonlygk]

Thanks everyone really glad I asked as I thought I would need a big 4000 pack for these servos and wasn't sure I had the space.

i think I'll look for a 2200 2s Lipo which will be nice and light as well

[helicol]

Optipower 2S 1450mAh packs here on Protos Max 780mm blades , getting 3 or 4 flights ( using approx 130 mA per flight). Using Torq HV servos cyclic and tail. Flying style - sport and poor 3d .

[cjm180]

i asked a similar question when i was building my trex600L. Went with a 2s 1800mAh lipo in the end.

[trillian]

Optipower 2S 1450mAh packs here on Protos Max 780mm blades , getting 3 or 4 flights ( using approx 130 mA per flight). Using Torq HV servos cyclic and tail. Flying style - sport and poor 3d .

Those servos much be more efficient or something, I'm pretty sure I'm using about 250-300mah per flight on average.

[p1andy]

Those servos much be more efficient or something, I'm pretty sure I'm using about 250-300mah per flight on average.

Helicol is spot on, mine are just over the 100mah per flight also. Yet on my f3c machine which runs 2s lipo through a regulator will take over 300mah per flight on ds600 series servos.

[Grumpy]

Helicol is spot on, mine are just over the 100mah per flight also. Yet on my f3c machine which runs 2s lipo through a regulator will take over 300mah per flight on ds600 series servos.

Linear regulators (if that's what you are using) are very inefficient, they burn off excess voltage as heat.

But I do find the same theme, brushless servos use a lot less juice than conventional servos. I'm in the ballpark of 130mAh for brushless and maybe 200mAh or more for coreless on 700 size helis.

[cjm180]

by the way that 1800 2s battery is straight into the GPro / receiver with two connections. No regulator. Direct connected. The GPro, R7008sb and all servos are HV, so didnt see the need for anything in between