BL ESC Killer

[loyn]

Hahahaha.......my CC Phx-10 is dead again .......hahahhah.... What can I say beside laugthing at myself...... This is the second (replacement from CC) BL ESC die on me within 3 weeks....and a new one is on its way to me from CC....hahahaha....just like in the war, replacement on the way to the front line......@#$%&*

Hope this will not happen to you guys

[loyn]

Oh by the way is there anything I should do to prevent such thing from happening again in the near future? All advises are welcome

Thank you
regards
loyn

[Super-Hornet]

Hi loyn

How did your B/L ESC died in the frontline? And what is the symptom?

And... how much did u send back (I mean postage stamp)? I just got my replacement for my CC PHX-25. I was wondering how much stamp do u need to put onto the envelop for me to send back the damage one.

Super-Hornet

[dabiddo]

Just bring it down to Post office and they should be able to tell you the cost... not expensive...think it's a couple of dolloars when i send mine back... just ask them for the lowest international postal....

[loyn]

It fail to initialize, no audio signal and the light come on and off for several times before off forever. No response to throttle from Tx.

1$ will do if you are returning with their self address envelop.

I believe there is some design issue on the Phx BL ESC. other wise they should not fail so offen for both the P-10 and P-25. Or just bad luck

[Super-Hornet]

Thanks for the info. I will send mine this afternoon.

I think u might seen my Dragonfly before (U know... Curve Landing Skids, Elevated Tail Section) the last Funfly. My B/L motor cannot spin/start up. I have to manual spin the blades first before I power up. Yesterday nite i replace it to the new one and WOW! now it does spin up even with main blades one and even with super slow start up.

My new replacement is the same as my old one. Only different is some of the MOSFET is from different company and the PCB circuit layout is the same except the protection coating is different. Another thing is that the uP marking now is J instead of I. I wonder the newer PHX-25 capacitor is what type? Mine is blue color but stilll one capacitor type.

Super-Hornet

[loyn]

Sorry no idea about the P-25 as I am using a P-10 for min weight. Anyway my objective is to use CD-rom motor rather that std BL motor for low weight and fun factor. (like to make something out of nothing.....hehehe)

So it muct be the ESC issue and good to know that now you have a proper setup heli to fly with. good luck with your flying and enjoy.

BTW what BL motor are you using? Did it have high current drawn? (short flight time) Can a P-10 handle it? As I have not much success with my CD-rom so may have to source for std BL motor....sucks

[Super-Hornet]

Hi loyn

Since u using your DIY CDROM Motor, I suspect maybe your coil wire too thick for your PHX-10 to handle...that is why it is dead.

The PHX has LED indicator and sound but the sound actually coming from B/L motor itself. Since u said no sound, could be the MOSFET die liau. If so, them maybe u overload the PHX-10.

I'm using Himaxx HA2025-4200. DAMN this motor is heavier than EM300 (or Mabuch RK-370SD). I think it is 66g. It is rated as 15A so that means I do not have problem running on my PHX-25 (25A continous). Why I choose HA2025-4200 because THAT IS THE ONLY PIECE Jet Hobby has! Damn. I'm too late.

My flight time is around 10 Minutesfor 3Cell 1500mA (Maybe this battery also dying soon because it was 2Cell initially then I put in one cell from a damage 2cell pack).

I wanted to make my own B/L motor out of CDROM but I only has 1 B/L controller. I don't want to kill the B/L in the process of developing it. Maybe I wait till I have enough money (or sudden urge) to buy new B/L controller to start off the CDROM motor project.

I bet my flight time is short because HA2025-4200 is heavy. 3Cell 1500mA (98g) also heavy.

Super-Hornet

[loyn]

I am using 0.45mm wire which is the smallest I can get from SLT. I am not too sure about the current drawn but the ESC is only slightly warn after 15 flight (manage to have a success flight with Joe's CD-rom motor) time. Joe is using the same configuration but with no problem. So not too sure what is the problem yet. Anyway my main problem with the ESC is not power overload but of unpredictable power cut at the motor (very short time) during fly.

The weight is the main concern with std BL motor. At 66g and 3S cell. Man that is not mirco setup any more. The motro have to overcome so much of it own weight before bring the rest into the air. It may not a concern for a plane but for heli.....that may post a problem.

Any idea where can I get thinner wire for the CD-rom?

[Super-Hornet]

I know I know my chopper IS HEAVY. No choice. I don't want to spend money on Astro or any good and light weight motor so I go for Himaxx...cheapest. I can't find HA2015-4100 (Same weight as 370) in S'pore... all sold out. Jet Hobby offer me B/L Controller + HA2025-4200 with discount. So I go for it.

Think of the bright side, heavier chopper is more stable than light chopper!!

Super-Hornet

[Super-Hornet]

Oh.. about the motor wire, another ways to get thin wires is to salvage / damage those computer fan motor.

Super-Hornet

[Super-Hornet]

Oh.. HA2025-4200.. even though is heavy, this motor IS DAMN powerful man!!! 4200rpm per volt... Imagine u run at 12V.

I use 8 Teeth Pinion and I can hover at 50% or less throttle. I can hit ceilling long before i reach 100%.

Anyway, this motor is like Formular 1 engine on a normal road car. It is more suitable for bigger chopper (like Zoom 400) where u have bigger area of rotor blades.

Super-Hornet

[Fit]

0.4mm wire

Loyn, I have some 0.4mm wire courtesy of Doug. I can pass some to you on the next funfly.

As for the power cut, its possible that you're suffering from interference. The other causes is that its losing sync of the motor.
Don't give up on the cd rom motor yet. I tried a couple of stators before I find one that works reliably. If that stator doesn't work, start afresh on another stator. Its possible that the stator's insulation has wore off due to winding and causing shorts.

Super Hornet, wow the 2025 is way overkill for FP's man. Its draining alot from the lipos as well. Luckily you got the Kokam which are more up to the task of handling the higher current draw. An Etec pack would have been destroyed by the 4025 in short use.

When you add the third cell, try to equalise each cell's voltage by charging each cell separately. You can still access the individual cells in a pack by adding a second set of connectors to the 2nd cell in the pack. For more info go here and click on Li-Poly terminal for accessing single cells.

[jaZallo]

Originally posted by loyn
Oh by the way is there anything I should do to prevent such thing from happening again in the near future? All advises are welcome

Thank you
regards
loyn

convert to nitro

enjoy!

[Super-Hornet]

Hi Fit

My Kokam should be 8C discharge capable.

A few weaks ago, one cell of my 2Cell Li-Poly balloons up when flying. After cooling, it deflate back to normal. I charge it up again and after a few minutes of flight, it balloons up again. So I took the one that looks ok out and fully charge it (4.2V). I then fully charge my 2Cell Li-Poly (another pack) to full charge. Measure each cells to make sure all are in 4.20V. Then I soldered them together to form 3Cells. Yes... I know and aware of those balance things but thanks for your info.

I believe that my battery is near to its lifespan because I always use that pack. I have another pack which has flight time around 12 Minutes... not confirm yet. Only tested a few flight.

Super-Hornet