Weird Near Crash Today!! Any Thoughts?????

[nguyen23464]

Check this out guys,

Raptor 30 V1,

I had about 4 tanks fuel ran through the chopper already today. Flying was good and smooth. On the 5th tank, arriving half way into the reserve tank of fuel. The chopper acted crazy.
Wouldnt respond to my controls.

I could still hear the engine. So the engine didnt die. It was going nose in. Tried to bring it back to the tail orientation and it was very unresponsive. I eventually got it to the tail perspective, and it was falling fast. Couldnt pull the chopper back towards me. It was heading foward on its own. The gears missed the bleechers by no more than a foot, and went over it. Luckily I killed the engine and got it to land on the training gears about nearly 100 feet away, right infront of the bleechers.
Phew!!!!!! Got sooo lucky on that one.

Afterwards,
turned back on the helicopter with the same amount of fuel, and it idled just fine, responded to my controls, servos check out fine, rudder and gyro seemed fine. Batteries check out fine. Second green on helicopter, 10.2v on radio.
Killed the engine and went home.

Any thoughts?

One thing I did notice was, on one of the TT woodies I was using, the plastic was starting to open up at the tip after the incident. I was thinking of fixing that tonite by just adding some transparent tape to cover it up. Whats you guys think?

Wind getting into the blades making the raptor go crazy?

Radio Interference? Open field though, no one was there except me.

Gas running out, causing the engine to go crazy?

[rcspud]

Low battery?

[nguyen23464]

Low battery?

Thought about too,


helicopter according to "voltspy" was 2nd green. Radio was 10.2v

I try to charge everything overnight before the next day flight.

[rcspud]

You really need to load a battery to test the amperage before you know what is happening with it. Ill bet if yo load test it now you wouldnt fly it until its charged again.

[nguyen23464]

You really need to load a battery to test the amperage before you know what is happening with it. Ill bet if yo load test it now you wouldnt fly it until its charged again.


Thanks, I will bring follow your suggestion. And making sure I bring a volt meter from now on.

[flyinfool]

With your volt spy with the heli turned on swirl both stick in a circle to get all servos moving at once and then see how far down the voltspy goes. That would be a poor mans load test.

Just using a voltmeter is not putting a load on the battries.

You need to use a 5 ohm resistor, 5 watt or bigger and connect that to the charge lead and measure the voltage across the resistor. Do not leave the resistor connected for long it will get hot and is putting a 1 amp load on the battery.

[porsche]

Sounds to me as though it was low batt. as well. I found that the on board volt watch is not that accurate. You need to use a loading volt meter very important. It would also depend on what batt. your heli has in it I was getting 3 safe flights on an 1100 ma batt. Good luck. Alan