Motor failure

[pazza]

Hi guys I was out today flying the trekker all was good after first batt pack. I landed and proceeded to rest it as it gets pretty hot. I then put 3 packs through 600 DFC and 2 packs through 550 DFC. I then powered the big girl up for final flight ( it runs the 800mx motor with hs of 2000rpms. It was couple of minutes into flight as I thought I might do 1 speed run as I only get 4mins of flight time. I was up maybe 400 to 500 meters and that again away from me when I heard the worst . I managed to auto it 15 meters away from me only damaging tail blade.

The motor was boiling and under inspection the wiring has melted. The bearings are fine but the rest is smoked. I have wiring all over the place. It even embedded into 1 of my satellites . I'm glad I didn't smash it. I've sent all settings and castle log to appropriate people and I hope they give me warranty. It's had no more then 15 flights through it so not sure what went wrong as I mostly fly my other birds.

[Varelco]

Gonna need to supply some more detail. What was the Motor timing and PWM set to, can you upload the logs on here?

[pazza]

[hunch]

Why would you want to fly up to 500 m with that size bird??
That's over 1500ft. If anything goes wrong as it did you can only
Hope that it lands in water.
First, I doubt you were up there at 500m but ok.
Second welcome to owning align.
It will grow on you

[RV_7A]

Pmw 12 rate is high and creates unnecessary heat. 8 is much better. Especially if you're just sport flying around. Not saying that should have taken out a quality motor like the 800MX but isn't good for longevity.

[pazza]

Originally Posted by hunch

Why would you want to fly up to 500 m with that size bird??
That's over 1500ft. If anything goes wrong as it did you can only
Hope that it lands in water.
First, I doubt you were up there at 500m but ok.
Second welcome to owning align.
It will grow on you

What u never done any speed runs from that high. I've been higher then that and I guess I'm lucky I can auto rotate... Nothing wrong with align mate everyone has malfunctions especially when u sell 10's of thousands of products.

[Phoinix]

I seriously doubt you were that high with a model and was able to steer it into auto and landing next to you, except if you were born with eagle eyes.

It even doesn't add up with your flight time. Except if you were climbing vertically with full collective... Than you know why the melted wires...

But, u can always take a video of how to fly a heli at that height.

[hunch]

i agree,
i think it was lifted to certain height (pretty sure it wasn't 500m) vertically
hence the burned motor and wires.
800 will lift at 12-13 degree pitch at about 100ft/s (~33m/s)
which means you had to put it on full blast for 12s to get to 400m and 15s to get to
500m.
let's not mention that after about 1200ft 800E is just a dot in the sky so yeah,
unless you have eagle eyes...

i did a flight similar to that once with a GPS module on it so i could see how high it really
went.
where we were it was about 400ft elevation and i put the 800 up to 1390, so in real life
about 990ft or about 300m and i could barely see it, i couldn't hear it anymore that's for sure.
scared the crap out of me...

so for you to say you were at 400-500m and "heard" something on the heli
i will need some video and numbers next to that statement.



ps:
LP v slovenijo!

[Phoinix]

Originally Posted by hunch

ps:
LP v slovenijo!

Hvala,
LP nazaj v ZDA

[Dino Spadaccini]

a important question is being missed was it a 120 0r 160 ESC

also i see your running fixed end points doing a speed that motor had to be over speeding bad


that motor was 184 *

[Dino Spadaccini]

to all that post here you see he never posted what ESC he was using So fast to point the finger at the Align motor. I just love these forums


Dino

[pazza]

Originally Posted by Dino Spadaccini

to all that post here you see he never posted what ESC he was using So fast to point the finger at the Align motor. I just love these forums


Dino

It was a ESC 120. I'm not bagging align matey. I love what they make for the price . I was probably to blame for the full power held on to long to get to the height I wanted.I already purchased a new 800mx for it and just waiting to see if align will warrant the motor.

Only cost me 150 bucks for new 1 quiet cheap.

[Dino Spadaccini]

120 is border line for what your doing and if you are doing speed runs i would get a 160


Dino

[pazza]

Originally Posted by Dino Spadaccini

120 is border line for what your doing and if you are doing speed runs i would get a 160


Dino

Thank you for the info .I don't normally do speed runs but I was showing a guy how fast it can go. It should of come with a 160 I reckon. Nevermind learn by my mistakes.

[PHANTMXR6]

Originally Posted by pazza

It should of come with a 160 I reckon. Nevermind learn by my mistakes.

This. It's amazing when a manufacturer or rep says you need a larger component because your flying is borderline.

My question is if it's needed then why didn't it come with it straight out of the box??

[Dino Spadaccini]

PHANTMXR6

It's not amazing we and i have been saying this from the time a 800mx and 850mx came out, the more power a motor makes the more amps you pulling the bigger esc you will need, You can try and get away with this but you could thermal the ESC and crash their needs to be some common sense at times, plus that motor is not rated for high speed runs i bet you where in the 130 mph range by the time you flatten out everything has limits including me.

if he didn't do the speed run he has been fine so it's not about whats in the box it's knowing your setup and its limits once you are beyond that all bets are off.


Dino

[PHANTMXR6]

Once again though Dino, if Align know the ESC is at it's limits with this motor then why are they
A: supplying an over powered motor.
or
B: supplying an under powered ESC.

Hardly a consumer problem if the manufacturer can't get it right is it?

If so, then a CC EDGE 160HV would need to be put in the budget when considering purchase of a new 800 DFC or Trekker model. That might be enough to put some prospective buyers off.
I know it won't entice me to buy an 800 from Align.......

[Dino Spadaccini]

120 with an 800 works look at bens flights from xfc that what he was using.

so again once the end user has the product we have no control over what and how they use it, the only reason the motor burned up was from a speed run other wise his setup was working.

So again what is in the box works and lets not for get the end user asked for more power we give to them, the trekker with a 800 and 120 works for what it is a camera ship

the new DFC 800 pro comes with everything the end user asked for in the box.

so again what was your point Align always puts the best possible products in the box at the best possible price.

[PHANTMXR6]

My mistake. I thought the new 800 DFC only came with a CC 120 and not a 160.

An 800MX motor has a capability rating of 115A continuous right?

If so, then the log posted earlier in this thread does not depict anything out of the ordinary.

pazza, is that the log of the flight when the motor failed?

[Dino Spadaccini]

129.3 amps that chart shows

I think thats a little over the rated 120 amps max under normal flights most guys are pulling about 80 to 90 amps which leaves about 20% to 30% head room in the esc you never fly max and this is with a 800 mx motor even it you where pulling 100 amps your good.


so again what is in the box works if you are a person that can shut down the 120 with an 800 then you need to look at setup of the motor and esc and heli max pitch and cyclic and if thats correct then move up to a 160 its that simple.

Dino