Furion 6 went in...

[dpelletier]

Furion 6 went in this afternoon.
Was just coming out of a loop and everything stopped. I mean I think the head stopped turning... not sure, it all happened so fast. It dropped like a rock into a muddy area from maybe 200 feet up.
Damaged Canopy, tail boom and that's all I see for now.
I actually spooled it up (low rpm) after and everything looks ok.

Is it possible the one-way seized up in flight?
Not sure where to start?

[Chris Sexton]

Ouch. Sorry to hear about the crash.

When you say the blades stopped. Did they stop all at once or by the time the bird hit the ground they were stopped?

I would think that if the owb had locked up you wouldn't know it until you tried to shut it down.

If the electronics lost power or the RX had a signal loss the heli could have gone into fail safe and that could be power down if you haven't set it up otherwise.




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[Corvette & Copter Guy]

Sorry to hear.

[spootman]

Sorry to hear the bad news Danny. Did you forget to switch out of normal mode (if you still use it) before the loop? I agree, if the one way seized you wouldn't notice until you spooled down or tried to auto.

[jadams]

A seized one way would not stop the blades unless the belt broke and wrapped up the main gear too. Just sounds like you stalled the blades and it fell from the sky....things happen quick.

[ahahn]

Just from the size of these blades, it would be amazing that they could just "stop"without completely wrapping up the head. There is a lot of stored rotational energy in the blades.

Must be one of those "slow motion" like feelings you can get when something like this happens.

Sorry to hear about it though.

[zoomtt]

That could happen. Do you know what is the peak power the yge can handle?

[dpelletier]

Originally Posted by zoomtt

That could happen. Do you know what is the peak power the yge can handle?

I've been looking and can't find anything.

[ahahn]

Just because a motor/esc is rated at 100 amps doesn't mean that you will actually pull that much.

That is entirely dependent on how much you are loading things.

In fact you can pull an arbitrary number of amps, at least for a short time , limited only by the coil resistance of the motor. Likewise with a low loading you can pull just a few amps.

The best way to see what is going on is to use a datalogger. Another option is to look at what other Furion6 setups are getting.

If you are flying a particular style, you will need a number of watts going into the rotor. This is independent of whether you have a 6s, 10s, or 12s setup. Of course the amps will scale inversely with the pack voltage. This at least will get you in the ballpark.

[dpelletier]

Finally got my boom replacement, so I started my tear-down today.

Not pilot error - pitt crew error (same guy though)

Pinion was loose on the motor shaft and one of the two grub screws was missing, other almost out... no indication of any thread locker anywhere

Oh well... just about ready to get back up... not quite sure what to do about the canopy or how to patch it while I wait for a replacement.

I'm thinking tape and epoxy?

[spootman]

Glad to hear you figured out the problem. Stinks when that happens, but at least you know what the problem was. I'm sure the epoxy would do the trick or if you have a scrap canopy, you could epoxy a patch to the inside of it.