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Home✈️Aircraft🚁Helicoptere-Thunder TigerRaptor E550 › Lost Control
06-20-2009 11:28 PM  11 years ago
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heliraptor10

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kokomo, in-US

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Lost Control
First let me apologize for not having video on this,
reading about a crash is lame.

On my 52nd flight my e550 went down.
My equipment

Raptor e550 stock motor,ESC
Dimension engineering BEC with 6v on (http://www.helidirect.com/sportbec-...-bec-p-4550.hdx)
Carbon blades
hyperion servos http://www.amainhobbies.com/product...e-Digital-Servo
on the swash
and the hyperion digital GMD on the tail
Zippy 4000mah 20c battery
DX6i
and
AR6200

What happened

I have been flying on a 6 minute timer with the Cellpro 10s estimating that I have a remainder of 30% in my battery when done,
when I recharge the cellpro puts in about 2000mah each time.

With this in mind on flight 52 I decided to push it past 6 minutes.

It had been an easy flight anyway,
and after 6 min I just kind of flew around low and slow.

at about 6 min 45 seconds I was in a nose in hover and I decided to fly away to bring her back around and land,
for a couple brief seconds she didn't seem to respond,
(kind of like when you are new and the wind just moves you around),
but
I didn't like it so I turned her away to move further away before landing (yeah I know I should have just landed then).

When I throttled up she quit responding and she started tipping forward,
after about 3 seconds she started responding again,
but I was at a high angle of attack,
so I throttle up and pulled back,
again she quit responding and kept going up and tipping forward.

She eventually landed right on her top,
and I have to say she took it like a champ.

lost
main blades
flybar
feathering shaft
The canopy windshield
Battery

The main shaft is still straight (though I will replace it, no reason to keep something that may cause vibration).

If it weren't for the battery it would have been a fairly cheap crash.

Anyway,
my impression is that I had several RX brown outs.

Anyone got any ideas?
Goblin! where have you been all my life?
RC helis, the original fidget spinners
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06-20-2009 11:34 PM  11 years ago
Max Headspeed

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Sunny (!) Livingston, Scotland

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Go back to landing at 6 minutes.Max Headspeed.
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06-21-2009 05:13 AM  11 years ago
heliraptor10

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kokomo, in-US

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Thanks Captain Obvious!

Seriously though,
on another page people have suggested all sorts of things,
and it was eating up a thread for another purpose,
so I started this.

I have had a couple people tell me how unlikely it would be that this was a brown out,
and in case it was something else I want to have my bases covered.
Goblin! where have you been all my life?
RC helis, the original fidget spinners
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06-21-2009 07:49 AM  11 years ago
AllThumbs

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New Zealand

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What Radio?
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06-21-2009 08:37 PM  11 years ago
heliraptor10

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kokomo, in-US

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Lol,
Knew I'd forget something

DX6i
and
AR6200
Goblin! where have you been all my life?
RC helis, the original fidget spinners
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06-22-2009 02:58 AM  11 years ago
AllThumbs

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New Zealand

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Well, it does sound a little like a brown out? or radio range issue? Have you done a range test on the ground?
Did you have fail safe setup on the transmitter?
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06-22-2009 08:19 PM  11 years ago
heliraptor10

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kokomo, in-US

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Range tested ok.

What do you mean by failsafe on the TX?
Goblin! where have you been all my life?
RC helis, the original fidget spinners
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06-22-2009 08:41 PM  11 years ago
Melnic

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Columbia, MD,USA

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30% remaining but your putting back in only 50% (2000 out of 4000)?
That does not compute Will Robinson.

You already mentioned in the other thread that there was no flashing light on the Main Rx or SatelliteRx correct?

Might you mention how your getting Rx power in the thread?
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06-22-2009 09:16 PM  11 years ago
heliraptor10

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kokomo, in-US

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RX power was off of the main battery, with the aforementioned BEC.

I didn't say there wasn't a flashing light,
I said I couldn't see one,
I will fix it so that next time I can see the RX lights.

I know the battery doesn't make sense,
but I just chalked that up to the Cellpro10s's inaccurate fuel gauge estimation.

One of the reasons I decided to push the battery.

The other being my on board battery monitor that is supposed to turn colors to indicate battery life,
blue (full battery), green, yellow, white, red.

It was programmed specifically for these batteries,
and when landing at my 6 minute timer the light was still bluish green,
and the last I saw it before I turned the heli away it was still green.

On my small heli I always landed at yellow green and had 20% estimated still in my battery.
Goblin! where have you been all my life?
RC helis, the original fidget spinners
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06-22-2009 09:43 PM  11 years ago
Melnic

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Columbia, MD,USA

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From your videos, I'd say what we do w/ our e550s are pretty close to one another.
I put back in about 3500 after 7 minutes. Mine is a tad heavier because I have the 5000mAh Zippy-H.
Although I set the timer for 7. I do often fly an additional minute or so hovering around.

I know if you power cycle the Rx, that it will flash but I don't know what happens if it looses Rx signal (like during a range test).

The only failsafe I recall is that when you bind, you should lower your throttle. IT will remember that and lower your throttle a short time after you loose signal. My first DX Rx I did a bind on the workbench w/ the motor disconnected and accidently bound at 1/4 throttle. During my first range test, the heli throttled up and tipped over on me Lesson learned
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06-22-2009 09:53 PM  11 years ago
heliraptor10

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kokomo, in-US

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I bound mine at 0 throttle.

I thought I'd read that the spektrum stuff (after losing a signal) will just continue doing whatever the last instructions were until it received new ones?
Goblin! where have you been all my life?
RC helis, the original fidget spinners
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06-22-2009 10:09 PM  11 years ago
AllThumbs

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New Zealand

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Not sure on the failsafe with Spectrum stuff, but I run Futaba & have my throttle set to 0 (Cut) in the case of a lost signal (On all my heli's, electric or nitro). That way if it's the motor or esc causing the interferance etc I get control back (in theory)and with the motor off there is usually less damage done if the ground leaps up & hits me. But to date I have never had a lockout or brownout to test that theory.. Yet
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06-22-2009 11:46 PM  11 years ago
helicraze

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Victoria - Australia

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AR6200 most likely the problem.

The powerbus on it is not recommend for full size servos. Many people have found out the hard way.
Now it can be argued that its should be fine blah blah but there are many many posts on it and also with a lot of these crases involving AR6200 that is the problem.

Get a AR7000
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06-23-2009 12:28 AM  11 years ago
heliraptor10

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kokomo, in-US

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It isn't?

The ar6200 (according to Spektrum) is rated from parkflyers to 600 scale.

I also did some searching here on runryder and couldn't find a discussion about the inadequacies of the 6200.

That being said I know it is low end,
but I know too many people who use this without problems.

If you can recall a link to info on this it would be appreciated.

I am still open to all suggestions.

If I bound the RX at 0 throttle,
then it would have gone to that in the event of signal loss,
so I don't think it was signal loss.
Goblin! where have you been all my life?
RC helis, the original fidget spinners
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06-23-2009 12:31 AM  11 years ago
helicraze

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Victoria - Australia

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Search in the mikado forum, there has been several reports this year already. OIC032 can tell you all about it.

Also with failsafes it only sets all other channels to hold, the thr will go to 0 with spektrum, however the ESC can can still keep running if something like the thr lead is unplugged depeding on ESC so keep that in mind.
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06-23-2009 11:17 AM  11 years ago
Ben-T-Spindle

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Central Illinois

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I had so much trouble with Spektrum (3 crashes) that I sold everything and got a Futaba 7C-2.4. Never had a glitch after that.

... BTS
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06-23-2009 04:20 PM  11 years ago
heliraptor10

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kokomo, in-US

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I wouldn't call this a glitch,
I've had almost a years worth of flying on this radio system with no problems.

And 51 flights on this heli without a hint of problems.

I suppose if a system is glitchy it has to surface sometime,
but I don't think thats it.

I did a test,
I pulled the power from the RX while it was running and it kept going for a moment and then stopped,
when I plugged it back in it came back immediately and the orange lights were blinking,
so I believe I have quick connect.

And this makes it seem likely that my receiver lost power,
but due to other points,
I wonder if it was my battery (as I initially believed) or some sort of failure on my BEC, heat, etc.
Goblin! where have you been all my life?
RC helis, the original fidget spinners
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