4s lipo on a 450 ???

[SamS]

Can a 4s 2300mah lipo be used on a 450 size heli, I would be using the stock 35amp ESC ??

[ghost2212]

Can a 4s 2300mah lipo be used on a 450 size heli, I would be using the stock 35amp ESC ??

With what motor? Not sure I would trust the inbuilt BEC on 4s either...

[SamS]

It's a scorpion hk2226-1

[ghost2212]

It's a scorpion hk2226-1

Can't seem to find that on the internet?

[aparkin]

Scorpion HKII-2221-6 - Scorpion Power System

it says 3 cell

[ghost2212]

that on 4s would most likely make the heli explode due to too high RPM. would also kill the ESC and be nose heavy as well.

[cjcj1949]

I've thought about trying 4S LiFe. You have to watch the gearing and the motor kv to get the max revs right. The motor needs to be rated to 4S as mentioned, and you'll need a SBEC rated to 4S or a separate battery. I don't see why a 3S motor shouldn't be run on 4S if you keep the throttle down to a safe level and limit the current as well. No motor is safe on any voltage if you load it enough. A motor may be sold as usable on a 450 at 3S for typical use, whatever that means. Brushless motors don't really know about volts except via the esc and the esc will never switch the volts on all the time as in a brushed motor. By brushless I mean our sort of motors with 3 wires. A 3S motor is probably best used on 3S unless you really know better. If you want better performance a smaller higher C battery would save weight.

[SamS]

Nahh, I'm after more power as I'm tying to turn the 450 into a camera ship.

Thanks for the advice people

[cjcj1949]

To lift more you need more thrust. The amount you can lift is equal to the change of momentum of the air that you can shift through the blades in one second. So you need bigger blades and or higher revs. The smaller the heli the more difficult that will be for a given lift. Momentum is mass x velocity. With props the best results for thrust were with large props and the best for speed was small props. Looks like you need to keep the revs as low as possible and use as much collective as you can to keep the velocity of the airflow low. Doesn't sound right to me though, seems to be the opposite of what I'd expect. Things are often like that though.

[ghost2212]

Nahh, I'm after more power as I'm tying to turn the 450 into a camera ship.

Thanks for the advice people

I wouldn't waste your time. The 450 is just too small to lift alot of weight in an efficient way. High RPM's just aren't efficient.

Having said that the biggest difference would probably come from semi symmetrical blades as they will give more lift for the same RPM.