EPOXY ESC ????

[garvey76]

HI ALL.
Just gone lipo but not had chance to get good flight yet.
using deans and original can.
having major problems with rudder. lots of movement when idle and sometimes doesn't work at all. managed to get air then stuck on full left rudder and got in a spin of death
is it interference from lipo battery or problem with solder joints on esc
tried an old parkzone mustang board and had same problem, no left or right or it goes mad or sometimes fine on ground then lose in air
looking at buying new esc, if i do can i epoxy the whole board to protect solder and joints
i also have Spektrum 2.4GHz DSM radio control system that enables you fly anywhere without ever having to worry about interference. this is from my blade cx2.
can i use this on the cub and if so how.is the range any good?
thanks for any help.

[flydiver]

Read this:
supercubclub.proboards78.com/index.cgi?board=motors&action=display&thread=1631

Lipo does not cause interference. If it worked before in your area then something has gone wrong.

You don't need to do the whole ESC and it's a bad idea. It needs to shed heat. The lousy part is the servo plug. Just a tiny dab on the underside and back help that. Don't get IN the plug or it's shot.

To put in 2.4 you need to change everything except the motor.
Spectrum cures everything, uh huh.

[garvey76]

Thanks for help flydiver.
read the link and it makes sence of my problems.
if i want to use the Spektrum 2.4GHz DSM radio control system from my blade, what esc would you recomend and is it all plug and play stuff or is soldering needed

[flydiver]

I'm not a Spectrum guy so I'll leave that to others. It should just be plug and play like your blade. If the TX setup is proprietary for the heli it may not translate over-don't know helis and their specifics.
You'd have to get a new RX, ESC, and servos. Motor is optional. The stock motor does pretty well on 3S if propped down a little.

Be aware that most brushed ESC do a poor job with LVC if used with lipos. I don't know any that do a top notch job. You should fly by time, not to LVC and bring it down with 20% of the battery left (that's about 3.6-3.7v/cell resting).

[garvey76]

Thanks again, ill go to my local store and ask about the change.

sorry whats LVC

[SCC]

Oct 13, 2008 20:41:42 GMT 1 garvey76 said:

sorry whats LVC

Low Voltage Cut off.
Did you remove the small jumper from your cubs rx when you went to lipo.

[garvey76]

Hi SCC
Yes i removed the jumper.
is it better to get a new esc that is for lipos only?
if so does it mean a new transmitter or can i get one to go with the spectrum from the blade cx2?

[SCC]

Hi Garvey.
I ran my stock SC on lipos for sometime and did'nt have a problem. The popular advice is to prop down to a 10X6

As for the 2.4 stuff from your heli, I have not got a clue. I still use 35megs and I am very happy with it.

[flydiver]

The issue on conversion is staying brushed with the original motor. Then you have to use a brushed ESC. Even those I have seen that are dedicated to lipo + brushed have a poor LVC.

You can fly by time. This means having something to measure voltage. Then you fly a safe period of time>land>measure voltage. IMO you should keep the resting voltage ABOVE 3.6v/cell.
This usually translates into something around 2.8-3.0v/cell WORKING but depends on the work load, and quality of the cell.
You then can expand the flying time to suit the capacity of the cell.
It does NO HARM and is actually better for the lipo if only used to about 50% CAPACITY.

Many of the brushed ESC have LVC around 2.0-2.5v/cell. Not good if you fly to LVC. A lot of lipos are ruined by bad equipment and lack of knowledge about how the power system as a whole works.

IMO unless you have an ESC you can program to 3.3v/cell working you should never fly to LVC.
The only one I know that does that is Castle.

FWIW I think the stock Cub LVC with jumper removed is 8.8v. Personally I think that is too low.

fly