crashed my 500 with CP2 on and sunny day

[vanguy]

I was flying my 500 on a beautiful sunny day and just having a great time with CP2 on. On my last flight, I went really high and did some rolls and came down very fast on purpose to land. When I got to around 10 ft, the heli just went out of control and veered backwards into the ground. Centering the stick did nothing and I was too slow to hit TH. Lots of damages and again my main sensor wire is off which happened on another crash. I thought I leaned my lesson and taped the sensor wire but I guess the tape was not strong enough. In both crashes, I still don't know if the main sensor wire coming lose and caused the crash or did the wire came off after the crash. I guess I have to look at the bright side which is how many crashes the CP2 prevented.

[Navigator53]

Sorry to hear that Van

I'm good about checking mechanical but.....

I quess I need to pay better attention to my little wires on Helicommand.

Mel

[icerat4]

I have my wires shrinked wrap on to help..Maybe thats the way to go instead of tape...Sorry to hear it man....Throw some money at it and make it better soon

[pril250]

Originally Posted by vanguy

I was flying my 500 on a beautiful sunny day and just having a great time with CP2 on. On my last flight, I went really high and did some rolls and came down very fast on purpose to land. When I got to around 10 ft, the heli just went out of control and veered backwards into the ground. Centering the stick did nothing and I was too slow to hit TH. Lots of damages and again my main sensor wire is off which happened on another crash. I thought I leaned my lesson and taped the sensor wire but I guess the tape was not strong enough. In both crashes, I still don't know if the main sensor wire coming lose and caused the crash or did the wire came off after the crash. I guess I have to look at the bright side which is how many crashes the CP2 prevented.

Are you talking the extension or the actual wire from the main sensor?

[nightflyr]

If the main sensor becomes detached, the CPII will shut down and just feed your Tx signals through the Avionics computer, as if it wasn't there..... if you were getting intermittent contact that would cause serious issues.
If you were getting no stick response, I would suggest you look at your Rx or flight pack if you are using one.

[vanguy]

Originally Posted by pril250

Are you talking the extension or the actual wire from the main sensor?

I'm talking about the extension. Going forward, I'm going to make sure the main sensor wire will never come off. There seems to be a hundred thing that can go wrong. What a unforgiving hobby.

[FLAME747]

"hundred thing that can go wrong. What a unforgiving hobby" - You Wanna compare stories.
on the extension the goes from the main sensor to the computer I put some heat shrink tubing around the connection.

Hope you get your Heli back in the air soon.

FCA

[nightflyr]

Vanguy,

I would suggest try hot gluing the connections, it is done all the time with the VBar unit due to the loose connection from the main sensor to the controller.

And if you need to ..it can be peeled off when you need to change something out

[pril250]

Yep, the amount of vibrations especially at high headspeeds under stress are uncomprihendable. That could work anything loose.

Be sure to secure things well to tie all loose cables and secure connectors with CA so if HeliGod forbid you have an incident you can be sure what didn't cause it.

[vanguy]

Night, I should have listened to you earlier. Most of my crashes were operator error but I had 3 crashes including this one with the CP2 on where the heli just veered off fast into the ground and centering the stick did nothing. One crash was high enough that I tried to correct before centering but to no effects. It's like the heli had a mind of it's own. I like to think that my crashes have to do with the main senor wire detaching but one of my crash did not involved any wire coming lose. With that crash, I hit TH in time and accidently discovered auto rotation and amazingly did no damage to my heli. I have a DX6i TX.

[pril250]

When you recovered the heli was the RX light flashing by any chance?Did you ever perform a range test with your TX.

A friend of mine was suprised to discover on a range check that the TX was failing, ie loosing control to early as he was stepping backwards, luckily he didn't fly that day, JR couldn't find a fault but never the less replaced the 2.4Ghz module and now it is all fine.

[nightflyr]

You really need to start looking at all your Rx connections and possibly your BEC, beginning to sound as if your suffering from brown outs, losing your signal to the heli.

What exactly are you flying, and what hardware have you got installed???

[vanguy]

Remember there is a video on this forum of a 600N all the sudden veering off and nose diving into the ground. All my crashes are similar. I have purposely dive the heli towards the ground and centered the stick and CP2 would snap it back to level in an instant. Of the 3 crashes, all I know is the heli just all of the sudden angled towards the ground fast and centering the stick did nothing to level is out. As for brown out, I'm not sure because the heli was fairly close to me when the I nor CP2 could avoid the impending crash. I have a PRO and a TREX 500 with all Align electronics and Spectkum RX and DX6i TX. No BEC. Just what does happens when there is a brown out, what does the heli do?

[nightflyr]

In a brown out the Rx fall into its failsafe default position, where ever that is when you bound the Tx to Rx, and if your in that condition for what ever reason, your sticks will do nothing because the Rx is not receiving a signal from the Tx.

I suggest you go over all your connection and ensure they are all clean and tight, also you might consider hot gluing them in place.

Now this may seem a bit extreme...

Power up your Tx and heli, and shake the daylights out of it to see if there is a faulty connection somewhere, could be a poor solder joint bad crip on a pin....this could prove to be a labor to track down.

[vanguy]

Night, I will go through the birds with a fine tooth comb. However I'm still perlexed as to why the heli want to veer towards the ground in the first place and why stick movement or centering the stick did nothing to stop the trajectory of the heli hitting the ground.

[nightflyr]

as I said if it was a brown out your Rx went into failsafe your stick inputs were not being received by the Rx....

[pril250]

My thoughts are that the receiver is connected before the CPII so if there was any power to the CPII and it sensed no stick input it would have done its job of levelling the heli.

I think over and above NF's suggestion to thoroughly check all your electric connections, a BEC is a must in your case for peace of mind (Not sure which ESC is in use and of what rating). At least that will ensure that if your ESC got hot and cut the power, the RX and CPII and the rest stay alive.

[icerat4]

I heard that some of the dx6i had issues ..a recall was done ...Am i right on this...



Here is the recall


http://www.spektrumrc.com/Articles/A...ArticleID=1901

[vanguy]

Guys, appreicate all your inputs and I'm going through the process of eliminations. There is power, no wires were disconnected other than the main sensor wire coming off the avionics computer but I still don't know if it came off before or after the crashes, the TX does not have the recall problem. I'm now more interested in what caused the heli to angle down towards the ground at full speed as though I'm banging the stick which I was not. Maybe it's operator error and I just don't know enough about it.

[icerat4]

Maybe a couple of heinkins Lol..Just had too..Sorry ill be next karma is a bitch