From 450 to 600 size leccy

[porkus]

Hi guys ive been reading alot of posts and have read all sorts of stuff that has made me think u need extra regulators and stuff on 50+ leccys,

If this is right say if i were to build a fusion 50 what extra would i need over a trex 450?
As in main components i know bigger batts lol but thats what HK there for

[CookieMan]

Well mate, to start with, you're going to need better/bigger servos that can handle the weight and torque produced by a bigger machine, as compared to a 450 size model. Now, since you're going to use bigger batts, you're going to need a higher spec voltage regulator to distribute the power to the electronics. If it is an electric 50 size, then bigger motors demand a higher spec ESC. There are quite a lot of brands out there that can help.

Then comes the Gyro - but thats pretty much standard compared to the 450. A good gyro can be shared between different size models.

[porkus]

Sorry shud of said i have the general jist of bigger evrything but what i was wnting to know was do i need a seperate voltage reg or whatever as u dont have one on a 450 only an esc

[CookieMan]

My bad, should have made it more clear - the regulator is NOT needed for bigger leccy's. You use them on engine powered models. (I overlooked you mentioned 'leccys' and thought initially when I was typing, that you were asking a general question about the bigger models.)

For bigger electrics you need a higher spec'd BEC-ESC, similar to the 450, but just higher spec'd, mate.

[CookieMan]

Thinking about it, just to make it a little more clear, the whole purpose of a BEC is that you have a seperate power supply to your receiver just in case your ESC shorts out or burns up in flight you can still land "somehow". All helis over the 500 class should have a bec for this reason.

On a 600 one would expect to have a 10 Amps BEC - I reckon. Also maybe a step down on the tail servo to reduce the amount of voltage sent to it, would also be a good idea, I feel. The recommended ESC for a 50 size would be a minimum of 150 Amps, but this is usually described with the motor. Some motors may just require a 100A one or so.

I'm hoping the leccy guys may jump in and correct me if I'm wrong at any point. Hope this helps.

[LaurenceGough]

It depends how much you are willing to pay, if you want to pay a bit more for a quality product then buy a ESC with a built in stable BEC such as the Kontronik Jive series of ESC's. You can use the built in BEC as it's one of the world's most reliable as with the ESC.

With cheaper ESC/BEC combinations if one fails the other tends to also, hence why it's a good idea to separate them if you go down this route that way you can still remain in control of all the servos etc, just have no motor power.

The only problem I find with the separate BEC is that there is additional wiring and more things to go wrong compared to a solid ESC/BEC.

And as Cookie has said really above for all else.

Batts
ESC
(maybe BEC)
Motor
Servos (cyclic and tail)

The size and rating of the ESC can vary, higher voltage systems use less amps, so a 12S high voltage battery will use no where near the amps of a 6S system under the same watts (overall power).


A 12S (HV) 600 size electric can be flown on as little as a 30A ESC as the amp draw is quite low. A 6S battery pack 600 size heli would need a 100A+ ESC.

Higher voltage also has the benefit of lower temperatures and longer battery cycle life.