I did something dumb, I think. Haven't figured it out yet.
I flew my Slow Stick this morning and found I needed too much right trim. Landed and took it into the bench to remove the wing and adjust the linkage so it would be zero trim. Turned on my transmitter, plugged in the slow stick battery. Everything OK. Started to push buttons on my Futaba T6EXA radio to bring up the current trim setting so I could reduce it to zero and then adjust the linkage. Before I got there the airplane went to full throttle, full down elevator, full right rudder. It jumped off the bench, cut my arm twice, broke the prop, and tore the gear box apart. I fought it to the ground and un-plugged it's battery. (A little dramatic but sounded good.)
What did I do wrong? This is about 40 flights now. I have made these adjustments in the past without being attacked.
I'm glad it was not my AXI 4120 with a 13 inch prop.
It's just sitting there broke now and I don't want to duplicate my mistakes.

ouch, sounds like the 6EXA it to blame.

A little late now, but as you have learned, you have to treat an electric plane with the battery plugged in the same as if it were running. They should always be properly restrained and the prop avoided as if it is turning. Purely by nature of it being controlled by radio signals, there is always a possibility of interference or radio failure causing uncontrolled operation.

As you found out they can bite pretty good. Alot of folks with tiny electrics seem to be under the impression that they are too small/weak to hurt them.

Richard
Tomball, TX

I got attacked by my slo stick the other day, at least it had the good sense to go for the pant leg, no injury. Totally me, I was sitting on the floor watching TV, forgot the battery was plugged in, jammed throttle to full. If it had got a little to the left it might have been intersting...

Andy

i know how those cuts are.
i just cut my hand trying to put a sharp APC prop on!!![:@]

My Wattage MadMax attacked me about a month ago... I went out flying with Glow and ele planes with my nice still new to me 9C that almost all of my planes are on. well I made a few flights with my little MadMax... now I'll swear to this day I unplugged the battery anyway I set it on my jeep's spare tire and proceeded to get one of my Glow burners ready, during "preflight" the MadMax seemed to be upset with the fact I directed my attention to my Glow planes... as I gave the throttle servo a check my now pissed off max slammed into my back lucky for me the weather was a bit cold... my jacket and heavy shirt saved me from injury, how ever they didn't help with the EMBARRASSMENT.

John

rwlewis; You are 100% correct. I learned the hard way. Some people learn from watching others pee on the electric fence. Some people just have to pee on the fence themselves..
Thanks.

Got bit in the leg too. Was carrrying my Astroflight 020 powered FMA Razor out to the flightline. Bumped the throttle stick while walking and prop got into my leg. No blood fortunately. Found out reaction time is directly proportional to pain.

David E.

You asked what your mistake was, it was playing with the radio with the motor battery pack plugged in.

I would say if you've done this before and NOT been bitten, you were lucky up til now. Never play with the Tx settings with the Rx pack plugged in!
Dennis-

The good that came from this is;
1. A new brush-less AXI 2808/14 for my slow stick.
2. I learned to never play with radio programing when the plane is energized.
3. When the plane is energized treat it as if the prop is running. Restrain it and stay out of the props way.

The planes and I should last linger with my new regard for safety. Thanks!