Connectors one use makes a GREAT difference!

[BonJour Brat]

Finally solve my H2 bogging prob, it was caused by the lousy jst connectors..

Tried looking for the micro deans but failed to do so, thus went down to sim lim to grab some gold connectors.. H2 now climbs reasonably well with 2s 1500 kokams without bogging!

To check out how u can make ur own Gold connectors which can handle up to 20amps for $1.60 a pair, Click here

[HZM]

Sure?


Mike

[MicroHeli-Nut]

Well I now know why my AXI cuts out in mid-air


even my heavy duty JSTs cant take the load... the CC10 got hot and so did the wires.....


My tail was just dialed in seconds ago...... then

cut.....

and bang!

And when i took her up again, the wagging came back!!!! Arrggghhhh I hate soldering@!@!!!#!@#$@#%

[MicroHeli-Nut]

And b4 i went down to test flight i was thinking; ' it's okay.... just dial in the tail... come back home tomorrow then work on the connectors.....''


Sheet sheet sheet!

[BonJour Brat]

Hmm... if bad connectors cause mid air cut offs as they rob power off the batts resulting in not enough current supplied to the esc, then that may just explain my ics400h cutting off halfway in flight with the jst!
Will monitor if the cut off still occurs..

[HZM]

I call myself intermediate in soldering skill

I solder w ease batts, motor, can of motor, wire etc.... nothing seems diff to me ( I am an electrical student ) Btw I use 63/37 solder......most commonly available is 40/60 ...... I never use flux ..... will give a pointer or 2 down the road


Mike

[D.Yeo]

Hey ray i think you should check and see if there's any mechanical drag in your transmission even the small JSTs , while not very good, will still work.

And in the same thing too, a hornet 2 with axi in fact it was ah tats one when he was first trying it out. he was usign the small JSTs as well. No problem his hornet still worked pretty good.

if somethig in the driveline's not good the power system might be under strain and is running a crazy current througth itself.



hey jon
bad connectors cause resistance which causes a voltage drop across the input terminals of the esc.The esc would detect a voltage drop not current drops. What's a pain is as the current flow through the system is increased rememberign that energy disspated through a resistor is I^2 R you'll find a greater and greater proportion of the battery output being used to cook the connectors. Bad connectors stink.

glad to hear your hornet is up and about now !

Maybe you and ray should order a batch of micro deans from ac world i think between you 2 there'll be enough to warrant a little shipment.

[mack]

hi,
Our 2mm gold connector handles 20 - 45A. They come in 2 pairs FOC with every Etec lipoly pack purchased.

Cheers,
mack

[MicroHeli-Nut]

I still think no one can solve my heat problems. Replaced all the lousy JSTs with the gold connectors mack supplied me with.... CC10 soldered directly to the motor.....

Esc gets hot even when motor is not running. CC10 motor wires heat up.......

how?!?

Doug?

Derrick?

[HZM]

I remember Aceviper mentioning even u never connect the P10 to motor, by continuously giving full and zero throttle, the FET on it will heat up. Not sure if you wanna try try

Mike

[MicroHeli-Nut]

How to try?

As in connect the only the Esc?

[D.Yeo]

Esc's that only only have their BECs running do tend to get warm,
dont know about them getting hot though that sounds serious.

what was funny was i had this wattage 15 amp esc that even when off, as logn as the battery was plugged win will like start discharging the battery or something and bloody drain it in an hour or two very cock and got hot.probably meant to do that anyway.

But with the phx 10 the wires and all also, sounds like a pretty big issue and i'm rather surprised the cc10's are very common amongst micro heli modelers

[BonJour Brat]

How bout the cc25? Anyone using that with the axi? Any idea if it gets hot too?

[Fit]

With CP's even without the motor connected, when you move the throttle stick up and down you're also operating all 3 cyclic servos. Thus the heat is from the BEC. The BEC gets extremely hot as in you can burn your finger after about 2 seconds with 3S.

I had to cut the shrinkwrap over the side with the led to cool the BEC. Ray if the ESC and motor is working fine, don't worry too much man.

[D.Yeo]

A DC-DC convertor like a bec circuit is usually very very inefficient and produces lots and lots of heat.

If i remember right the energy loss through the system is something like a square factor of the difference in voltage in and out.


but man having an expensive esc like a cc10 getting hot that's upsetting. Maybe i better not buy one.