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05-01-2004 06:56 PM  13 years agoPost 1
mnewhook

rrApprentice

Newfoundland, Canada

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Hi,

I had a very short flight with my fury today... I took off and flew one circuit and was coming down to check the engine temp when all hell broke loose. The heli was coming toward me nose-in at about 30 feet when it started piroflipping, and doing all sorts of crazy stuff. I immediately hit throttle hold, but the engine didn't drop back to idle. I'm not 100% positive but I don't think I had any control over the heli. From the time it went nuts to when it smacked into the ground was perhaps 3 seconds. After it smashed in I ran over to try and stop it from beating itself to death. I stayed back until luckily the flybar got stuck in the canopy and the heli stopped doing the funky chicken. My buddy rushed over and hauled off the fuel tubing. During this I was trying to kill the engine, but no dice.

I took the heli over to the bench and took off the canopy expecting to see the battery unplugged or something of that nature. Amazingly when I turned on the radio and heli again it all appeared to work perfectly, except the rudder servo which is stripped. I had lots of other flights that day with other helis and no radio problems -- so I don't think that is the problem. I checked the PCM lockout setting and it was also functional -- engine to idle, collective to 0 degrees and cyclic to neutral.

The tail gears still appear fine, the torque tube is still intact and fine. Besides if it was only the tail that had gone I would have thought the heli would start pirouetting, not piroflipping!

I'm at a loss to the cause of this problem, which sucks alot since I don't really want to spend a pile of cash on repairs only to have a repeat of the incident!

Things that are definitely broken:
- Clutch is fried.
- Boom
- Blades
- Grips
- Flybar
- Spindle
- Main shaft
- Tail push rod
- Tail blades
- Most of the connecting rods for the swash
- 9253 gear set

Does anyone have any ideas as to what could have happened?

Regards, Matthew

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05-01-2004 07:03 PM  13 years agoPost 2
lfalsetto

rrKey Veteran

COLORADO

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I have now heard of more lockouts with Fury's recently. I am experiencing one myself and can't id the problem. I am wondering that maybe the tight canopy and placement of antenna may cause the problem.

I have no real ideas.

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05-01-2004 10:00 PM  13 years agoPost 3
mnewhook

rrApprentice

Newfoundland, Canada

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A couple of other strange things about this crash...

The flybar looks to have a burn in it right around where my flybar weights are. I don't think it could possibly have touched the clutch, so I have no idea what is up with that.

The horizontal tail fin was pushed back so that that the tail blades would touch it, however I think this must have happened post-crash since the fin has no marks. What's strange is that covering that you put around the carbon tail push rod where it goes through the last rod support is all torn up... how could that have happened?

I hope the engine isn't fried. It was running at a good clip on the ground for a minute or so. There is all kinds of black residue underneath the clutch bell, and bell itself is now a golden color and not the nice silver color it used to be.

It was a nice running ship. 300+ flights without a mishap. The only thing I can imagine occurred is that either the battery pack is flakey, or the receiver has a problem with vibration and flakes out also...

Regards, Matthew

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05-01-2004 10:16 PM  13 years agoPost 4
crashdebris

rrNovice

Choctaw, Oklahoma

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Is it possible someone else turned on their transmitter on your frequency? I'm still a newb so please tell me if this wasn't possible.

Sorry to here about your loss, hope you'll be back in the air soon!

Dan

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05-01-2004 10:18 PM  13 years agoPost 5
mnewhook

rrApprentice

Newfoundland, Canada

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Anything is possible, but when I was flying the only other guy around was my pal and his radio is on a different frequency.

Regards, Matthew

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05-02-2004 12:50 AM  13 years agoPost 6
Conrod

rrVeteran

Mount Dora , Florida

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maybe Switch is going/gone south?

just a place to check

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05-02-2004 02:18 AM  13 years agoPost 7
shaley

rrNovice

montclair, NJ

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I have a 700 MAH rotorsport blades (excellent shape) and blade grips (used, but in good condition) if you're interested.

$80 shipped.

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05-02-2004 05:57 AM  13 years agoPost 8
KC

rrElite Veteran

WA

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I had a lockout a few weeks ago, I tracked it down to the rubber o-ring that slides onto the starter shaft, between the clutch bell and clutch, no problems for a long time before that wore out.

maybe that who knows?

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05-02-2004 06:13 AM  13 years agoPost 9
helimike77

rrApprentice

La Habra, CA

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Any Links pop off? I had a link on the head pop off and it did a similar thing. Was all over the place as it headed towards the ground. I know it was this on mine since it was the only link off after it crashed.

Mike

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05-02-2004 01:53 PM  13 years agoPost 10
mnewhook

rrApprentice

Newfoundland, Canada

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Hi,

I don't think it was links, since I had apparently lossed radio control. The more I think about it the more I think that the only reasonable explanation is total power loss -- which means either the battery or the switch.

Regards, Matthew

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05-02-2004 02:32 PM  13 years agoPost 11
Ken B

rrElite Veteran

Phoenix, AZ

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Sounds aweful similar to when mine fried a switch.

In the air the bird just started to fly like I was Jason Kruase. My buddy said that was some of the wildest flying he had seen. Unfortunatly I was not in control of the bird in any manner. I even handed him the radio and told him to try. After what seemed like an eternity my Fury discovered gravity and plowed in.

Post crash inspection revieled nothing. I tested every componant thinking Battery, servo, reciever..... Lastly I tested the switch. It was working normally. Sence it was the least expensive item I took it apart to see what if anything was going on in it. Sure enough I found signs Arcing and browning from excessive load. After I rebuilt my bird, I went with a good heavy duty switch. Damn glad I did, havn't seen a problem since.

Ken B

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05-02-2004 03:36 PM  13 years agoPost 12
kthane

rrVeteran

Pensacola

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I've seen this stunt too on a R50. Looks like JK/TB flying yet nobody is controlling it! In this case a wire broke of the battery. It slowly fell from a 100ft doing some wild a$$ aerobatics and funky chicken funnels. The cool think is when it hit, it went into some grass. Think the only damage was a bent flybar and some broken double links. The blades survived! If you were flying PCM and the servos were slowly moving around my best guess is you lost power to the servos/rx.

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05-02-2004 03:41 PM  13 years agoPost 13
Greg McFadden

rrKey Veteran

Richland, WA

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well, you want strange, I had one instance where adding a 12" servo lead extension (any 12") caused interference and lockout where a shorter or longer one would not.

The silence often, of pure innocence persuades, when speaking fails

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05-02-2004 03:49 PM  13 years agoPost 14
Polariman

rrApprentice

Annandale, Minnesota

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It sounds like a similar crash of mine. I had a 401 gyro that suddenly went out. Check the gyro and maybe send it in to be checked. Maybe at 30 feet you did not have enough time to see if you had tail control.

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05-02-2004 03:52 PM  13 years agoPost 15
Polariman

rrApprentice

Annandale, Minnesota

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If it was the switch, look into the perfect switch at http://www.centralhobbies.com. It has a 5.1V regulator (running a 6v battery) and it fails OPEN.

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