Re: Odd crash, any ideas what happened?



Jen,

Sorry for your loss.

How many flights do you have on this unit? I don't have any rc
experience, but at my job we diagnose all kinds of equipment problems.

If you are pretty sure there was no radio interference, then there
was an electronic failure. Your batts were all up, so that should not
be the problem. So it's either a bad TX or a bad receiver, which I
assume is now destroyed. If it was the receiver, then a new complete
plane will fix it. If it was the TX, then the new plane will do the
same thing.

I would see if you can send the TX and whats left of the ESC/ Rx
back to PZ for evaluation.

Larry

On Fri, 13 Jul 2007 11:10:10 -0600, Jennifer Smith
<jennifer@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

This morning I stuffed my old F27B, and I don't know what happened:

Charged LiPo, topped off TX batteries. At the field, did the usual
pre-flight: Servo check, engine check, plugs all checked, linkages
checked, fuselage checked. It all checked out, nothing out of the
ordinary whatsoever.

Launched, plane climbed to altitude. Brought it around for a big circle
when I noticed the first oddity: The plane climbed rather steeply. I cut
back power and adjusted the trims, regaining control and deciding to
bring it down. Before I even got to lining up for approach the engine
revved up, the nose dropped into a straight down dive, from about 50-75
feet up. I cut throttle, flipped from low rates to high rates and tried
to pull up - but the engine was still screaming and the control input
had no effect whatsoever. The plane went straight into the ground, with
engine screaming all the way until impact.

The plane is pretty much a loss. I haven't looked at the mess yet but
I'm stunned as to what would cause such behavior? It doesn't feel like
radio interference, it just seems like an entirely odd loss of control.

Any ideas?


Jen

.

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