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Modefo's RC Helicopters . XHELI.COM . Autography FlightPower

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Safety - RC Helis are not toys > Lucky
 
 
yrags
Heliman
Location: Boise, Idaho

They say wisdom is knowledge gained through experience. I believe it! Anytime we do something stupid and learn from the experience we have gained something. If we get away with not hurting ourselves or someone else in the process we are also Very Lucky.

I was test hovering my Concept 30SX for only the second time after the installation of my new RD8000 radio. Like I've done many times before when making these hover tests I do it on my driveway in the front yard. I was dialing in the REVO mix on my tail rotor and on the 3 hop had the heli suddenly yaw 90 degrees to the left. I corrected for it and then it went about 80 degrees to the right. I set the heli down and left the rotor head spun up. I checked the tail rotor control and all seemed ok. I assumed I was hit by a gust of wind.

I popped my heli into a hover again (Big Mistake!!!) and suddenly found myself with a tail rotor that had a mind of its own. Remember, I'm a beginner, so I fought valiantly to maintain control. The heli yawed, this way, then that, all the time drifting closer to my garage door. Suddenly it did about 4 piroette's to the left and the rotor blades hit flag stone supports between my garage doors. CRRRAAAAKK!!! I remember putting my right arm over my face and turning my back to the heli just before the rotor blades hit.

Pieces of my woodies flew everywhere, the heli fell about 3 feet landing upright on its skids with the engine still running but the rotor head jammed and not turning. I hit the kill button but nothing happened so I reached down and pinched the fuel line and killed the engine. I then noticed that my receiver and battery were laying on the ground completley unplugged!. No wonder the kill switch didn't work.

I found splinters of rotor blade over 30' away behind me on the front lawn. How I didn't get hit by flying splinters I don't know.

I haven't figured out what went wrong yet but I started thinking how stupid it is to hover in my front yard. What if it flew away and hit some else's house, or a neighbor, or me. The liabilities are staggering and I really lucked out that nothing bad happened other than a broken heli.

I'll NEVER hover in my yard again.

Fly safe everyone and use good judgement.

Gary
06-05-2003 Over year old.
 
 
DOKEY
rrProfessor
Location: Northampton UK

Sounds very much like your gyro needs to be reversed !!

Check the gallery!
06-05-2003 Over year old.
HOMEPAGE  
 
 
yrags
Heliman
Location: Boise, Idaho

Lucky

Actually the gyro is working in the correct direction, I checked that very carefully before I flew the heli with my new radio. I had flown 1 week prior to the accident with no problems with tail rotor control, other than the Revo mix needed a small amount of tweaking. Thats why I was flying it on the day of the accident, to get the Revo set correctly cause it was over correcting a very small amount. Also, as I made changes to the Revo settings I was doing so in very small increments so I don't think it was because of the tweaking I was doing.

When the tail rotor went crazy it was a sudden change like something failed. Before that it was hovering fairly stable with no twitching in the tail. I need to investigate further to see what went wrong.

My big decision now is weather I should fix my old Concept 30SX or not. Its gonna need about $120.00 worth of parts and I'm not sure its worth fixing. I'm seriously looking at getting the new Raptor 30 V2. Many of the pilots in our club fly Raptors so there is a larger experienced resource base avalible to me for setup help.

Thanks for the feedback though...

Gary
06-05-2003 Over year old.
 
 
helicopter
Senior Heliman
Location: Omaha, Nebraska

Just dew it...

Get the rappy v2 with the TT39 in her!
You'll be GLAD you did!

Byron

I love gravity, it always keeps my feet planted when I fly! Byron 2 Peter 1:3 The Bible is True.
06-05-2003 Over year old.
 
 
gerallt
Heliman
Location: Caernarfon, N Wales

Was your gyro in HH mode? I don't think you should have revo in HH mode, only in Normal.

Could it be this???

Gerallt
06-05-2003 Over year old.
 
 
SolarXtreme
Veteran
Location: Arroyo Grande, CA

The old concepts had a problem with the wire drive. Sometimes the tailboom would slide back just slightly and the wire drive will disengage.
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I picked a hell of a day to quit drinking

Avant EFX
Freya EVO
06-05-2003 Over year old.
HOMEPAGE  
 
 
zabir
Veteran
Location: Leicester, UK

Lesson learnt, fortunatly with no human damage.
06-05-2003 Over year old.
 
 
mykool
Heliman
Location: New Zealand

Sorry about your loss it always hurts but you will be wiser next time.
but Gerallt you are right...you shouldnt use Revo in HH mode things start to get very twitchy!.

mike

Gravity sucks!
06-10-2003 Over year old.
 
 
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Advantage Hobby . Revolution Models . CarbonXtreme

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Safety - RC Helis are not toys > Lucky
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