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GrandRC . CanoMod . A Main Hobbies

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Crashed? Discussion and Photos > chicken dance
 
 
jh77ie
Senior Heliman
Location: rancho cucamonga,ca. ,u.s.

well im not a very good dancer but my raptor is she just couldnt get enough of it the other day she danced till she blew the clutch out of the side of the clutch bell. mechanical failure during punchout i punced out then she went full peg negative strait into the ground and danced her little clutch shoe off. narrowed it down to two possible reasons after i yanked the fuel line i rolled her over to inspect damage first thing i noticed was a broken servo arm on the collective. possible reason #1 the only other thing i can think is a spike of power to the reg which sent my receiver into failsafe. im leaning towards the servo arm.
01-22-2008 11:47 PM
 
 
Shredder777
Senior Heliman
Location: Riverside, CA - USA

ouch, sorry about your crash. Seen my first chicken dance a few weeks ago from another guy and that was the most nerve racking experience I have ever witnessed. It just beat it self to death.

Hope u can get her flying again soon!
02-06-2008 04:49 AM
 
 
bigdad390
Veteran
Location: e. liverpool, ohio

Chicken dance = Not good. Sorry to hear you had one.
02-07-2008 10:00 PM
 
 
jh77ie
Senior Heliman
Location: rancho cucamonga,ca. ,u.s.

it happens
02-08-2008 01:56 AM
 
 
bosshoss
Senior Heliman
Location: Chicago, IL

Chicken Dance....

I Chicken Dance'd at my Wedding 20 years ago......it was fun.

But, I NEVER want my 50 or 90 to try.....unless the music is playing for effect....

You know the tune...

DADA DADA DADA Daht, DADA DADA DADA Daht, DADA DADA DADA Daht....Clap clap clap!!!

Sorry dude. I watched agood friends Xcell destroy it self and all the electronics....in the time it took for someone to run to the parking lot and get a blanket to throw over it, it was finally motionless, maybe a minute and half or two minutes....screaming its guts out and exploding the bottom off the motor.

Sucks.
02-12-2008 02:00 PM
HOMEPAGE  
 
 
rkeith2
Veteran
Location: Norco, CA

I witnessed it - heinous when they self destruct.


02-12-2008 02:43 PM
HOMEPAGE  
 
 
GyroFreak
Key Veteran
Location: Florida ... 28° 50' N 81° 16' W

Terrible feeling watching your bird commit suicide ! Here is my solution for power loss which often happens on a crash leading to the dreaded chicken dance.



EDIT: IT is a very light spring and I would rather have the slight load on the servo than the #&##&%# chicken !

Support bacteria. They're the only culture some people have. !
02-12-2008 02:55 PM
 
 
Jon the Rooster
Elite Veteran
Location: Johns Island, Charleston, SC

My Gasser didn't need a spring cause there was allready one loaded inside the carb to shut the venturi closed if the link rod fell off.
But Great idea if you didn't have one!!

and one more thing "DON'T BE AFRAID!"
02-12-2008 03:08 PM
 
 
GyroFreak
Key Veteran
Location: Florida ... 28° 50' N 81° 16' W

Quote 
allready one loaded inside the carb to shut the venturi closed if the link rod fell off.
Jon, your right and that spring did save me once when the rod end broke off. But it is not enough to overcome the servo if the battery gets thrown out on a hard landing or crash. Thats why I added the extra spring.

Support bacteria. They're the only culture some people have. !
02-12-2008 03:25 PM
 
 
bosshoss
Senior Heliman
Location: Chicago, IL

This where a Smart-Fly Opti-kill makes so much sense for a gasser.

Lockout...dead engine. Rx Battery failure...dead engine. flip a switch..dead engine.

I have been amazed at the rejection in the Heli community for this device.

My gasser will certainly have one, planker that I am.
02-12-2008 04:21 PM
HOMEPAGE  
 
 
GyroFreak
Key Veteran
Location: Florida ... 28° 50' N 81° 16' W

Hey Boss, give me a link to where I can see what this does and how. I never heard of it. How can it kill the engine on loss of power. I guess it could use a normally closed relay that kills the ignition when no power ??

Support bacteria. They're the only culture some people have. !
02-12-2008 04:51 PM
 
 
Jon the Rooster
Elite Veteran
Location: Johns Island, Charleston, SC

Quote 
How can it kill the engine on loss of power
You can't!!! Spring to overcome the servo is it, but,that's got to be a strong spring.
I am think'n about put'n a spring on my nitro ship, blown 2 motors allready du to linkage pop'n off -then Red-Lining!!!

and one more thing "DON'T BE AFRAID!"
02-14-2008 02:39 AM
 
 
gian
Senior Heliman
Location: AZ

Nah- Doesn't need to be so strong with some of these digital servos.

My (aging) S9253 will swing effortlessly while unpowered.
02-14-2008 02:43 AM
 
 
bosshoss
Senior Heliman
Location: Chicago, IL

Uh, yes it can kill the motor upon loss of power to the reciever, FACT.


Yes, the use of a relay is required for magneto systems with this system.

When the rx loses power the light is turned off in the fibre....no light, no power (supplied by separate battery, or diode isolated from the rx battery) is supplied to the relay.

I would prefer a separate battery for the relay. That would make it entirely independent of the RX system. Omron relays take 100mah current to trip, so a 300mah 2cell would do it.

Simply the best kill system made. I don't fly any gasser plank without one, and my Predator will have one.

I am still in disbelief that the gasser heli community doesn't DEMAND these devices at events , as plank events do. Well, plank events DEMAND a remote engine kill method other than throttle kill.

AKA, choke servo, ign kill, any method..servo/switch, opti-kill, etc.
02-14-2008 03:01 AM
HOMEPAGE  
 
 
bosshoss
Senior Heliman
Location: Chicago, IL

LINK to Opti-kill.

http://www.smart-fly.com/Products/Ignition/ignition.htm
02-14-2008 03:02 AM
HOMEPAGE  
 
 
GyroFreak
Key Veteran
Location: Florida ... 28° 50' N 81° 16' W

Quote 
Doesn't need to be so strong with some of these digital servos.

True, the spring I added to my gasser (which would work equally as well on nitro) is quit light, and I adjust it with a tie wrap to enough to overcome the servo (9451) with no power. Sure, it adds some servo load, but it isn't much and what it can save you in the event of a crash is well worth it.
See my previous post for picture or my gallery.

EDIT:
My gasser has a built in spring on the carb, but not enough for the servo no power return, but saved it once when a throttle linkage popped off. On a nitro the spring should be connected to the carb arm in case the linkage fails (rod end breaks or pops off).

Support bacteria. They're the only culture some people have. !
02-14-2008 04:39 AM
 
 
Laurens
Key Veteran
Location: NL, behind my computer

I would have put it on the arm of the carb instead of the servo, what if your linkage pops off

Team RC-TEK
Team Airthunder
02-16-2008 05:53 PM
 
 
jh77ie
Senior Heliman
Location: rancho cucamonga,ca. ,u.s.

heres some pics check out the clutch

02-27-2008 12:39 AM
 
 
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Crashed? Discussion and Photos > chicken dance
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