Belt-cp problem

[bjleung]

Hi all,


I have a problem with my belt-cp, I got the RTF set and was running fine then heli was hovering very stable until suddenly the esc burn out after 2 packs of cells (2200mah 25c) I know it was the esc because I connected to my friends esc and it worked fine. Anyway I repleaced the esc with a towerpro 30a brushless esc installed it and everything was working again but when I try to fly again the heli won't lift off the ground. The heli seems to be geting good head speed but it never leaves the ground. Everything seems ok but won't lift off the ground even at 3/4 throttle. My pitch curve is -5, -3, 0, 5, 10 (normal flight) and throttle curve is set at 0,50,80,90,100. I have not crash the heli and I checked the pitch and it was good.

Ok so here is my question, if my setting is correct, batteries are new 2200mah 25c (fully charged), esc is new at mid throttle my heli should lift right? Right now my belt-cp is 99%new so the only thing I can think of is the Brushless motor EK5-0006 was damaged along with the stock esc so I am not getting enough rpm (I don't have a tachno so I can't measure) should I change the motor. Please give me some advice :tongue

thanks alot.

[sleddog7]

Is that a programmable ESC? If it is you'll need to set the throttle curve to a linear setting on the TX, then program the ESC.
After that is done, you can set the desired T-curve.

What TX do you have?

[carlo_the_wonder_frog]

Maybe you have the motor running the wrong direction? What direction do the blades turn? CW or CCW? If that is the case switching around any 2 of the 3 motor wires will correct that. Check your pitch curve and make sure it is actually controlling the pitch of the blades.

[bjleung]

Is that a programmable ESC? If it is you'll need to set the throttle curve to a linear setting on the TX, then program the ESC.
After that is done, you can set the desired T-curve.

What TX do you have?

I have the futaba 6EXHP the esc is programmable I never tried programming the Throttle curve on the ESC but I did on the TX.

[bjleung]

Maybe you have the motor running the wrong direction? What direction do the blades turn? CW or CCW? If that is the case switching around any 2 of the 3 motor wires will correct that. Check your pitch curve and make sure it is actually controlling the pitch of the blades.


Hi,

the blades are turning clockwise looking from the top, I checked the pitch curve also and they seems to be correctly. I am down to my last solution of buying a new motor for it and see if that's the source of my problem casue everything is quite new on my heli. Anymore hints? Your help are greatly appreciated.

[sleddog7]

You can't program a T-curve on the ESC.

You do have to (usually) program the ESC... timing, volt cut-out, soft-start, brake.... blah blah...

The TX throttle MUST be linear for the set-up of the ESC.... After programming the ESC, you can then set your desired T-curve on the TX.

[sleddog7]

Have you used a pitch gauge for the blades?... Carlo has a good point.

[bjleung]

You can't program a T-curve on the ESC.

You do have to (usually) program the ESC... timing, volt cut-out, soft-start, brake.... blah blah...

The TX throttle MUST be linear for the set-up of the ESC.... After programming the ESC, you can then set your desired T-curve on the TX.

Thanks,

You are right, the esc have default setting all I set was the throttle end points and the soft-start the timing, voltage cut and brakes I left at default. I set the T-curve on my TX (0%,50%,80%,90% and 100% curve).

[bjleung]

Have you used a pitch gauge for the blades?... Carlo has a good point.


Yes I used the pitch guage and it reads (-5,-3,0,5,10 for pitch curve setting)

[bjleung]

since no one yet mentioned this could be a motor problem I guess no one feels my problem is caused my the motor? I am just wondering besides Head Speed (RPM) and pitch and good fully charged batteries what other factors will make a new heli not wanting to lift at all. Mind you that my heli is not hopping or sliding left or right..it stays put on the ground with the blade spinning and if I give it enough throttle the heli will start to virbate and shake then I ease on the throttle ...

[sleddog7]

On your TX, what is the ATV % on the throttle?

Do you have your main blades tight?

[bjleung]

On your TX, what is the ATV % on the throttle?

Do you have your main blades tight?

Sorry I don't have my TX with me but I never touched the ATV % since resetting the model so my guess is either 0% or 100% which ever is defaulted on the 6EXHP

My main blades are relatively tight, no super tight that it can't move back and fourth and not so lose that it can be flinged around either. So I say its 90% tightened.

[sleddog7]

If you have +10 degrees full pitch as you say, and the motor develops full power... it HAS to lift off.

There's a problem somewhere.

Throttle ATV needs to be 100% up and 100% down.

Post a pic of the head with the motor unplugged and at full collective stick.

[bjleung]

If you have +10 degrees full pitch as you say, and the motor develops full power... it HAS to lift off.

There's a problem somewhere.

Throttle ATV needs to be 100% up and 100% down.

Post a pic of the head with the motor unplugged and at full collective stick.


ok I will get a new motor and test first..if the problem persist then I will upload a photo. Thanks alot for your helps.

[carlo_the_wonder_frog]

Perhaps you have the pitch reversed? When you are giving it positive pitch maybe its actually going negative? That would totally explain things. Check your paddles too, make sure the leading edge is biting into the direction of rotation.