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HomeAircraftHelicopterHelicopter Main Discussion › Help with spinning Heli
04-10-2014 03:12 PM  4 years agoPost 1
HeliNutAndy

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worcester, MA USA

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Last weekend I took at my Goblin 500 and my Logo 600. The winds were gusting which is usually not that big of a deal for me. I had three flights without incident. When I went to fly for the fourth time I spooled up like I normally do and the heli started to spin uncontrollably on the ground and I ruined a set of tail blades before I could hit throttle hold. The wind was gusting up a bit. What would cause this? Do you think it was the wind? I'm kind of pissed that this could happen out of the blue. I always perform pre-flight checks to make sure the model is air worthy and their were no issues with the model.

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04-10-2014 04:03 PM  4 years agoPost 2
cbflys

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Nesconset, NY - USA

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Gyro correction reversed?

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04-10-2014 04:32 PM  4 years agoPost 3
rexxigpilot

rrProfessor

Florida

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Assuming you did not make any changes to your setups, it may be that your FBL gyro did not initialize properly. Perhaps the heli moved slightly before initialization was complete or there was a power interruption when plugging in the batteries, like a double plug-in. Either of these can cause the initialization to fail.

Which FBL system are you using? V-Bar typically gives an indication when it fails to initialize properly by pumping the collective. Although I have seen a V-Bar go berserk without giving the failure signal.

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04-10-2014 04:50 PM  4 years agoPost 4
dkshema

rrMaster

Cedar Rapids, IA

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IF the radio setup didn't change, and if the FBL unit initialized OK, look at the tail drive system. If it's belt and pulleys, look for slipping pulleys or other drive train problems.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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04-10-2014 05:04 PM  4 years agoPost 5
icanfly

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ontario

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If I may, are your servos high voltage? Would it be possible the tail was buffeted enough to go into failsafe. Is the tail servo hv and cp ones 6.6v? I had to remove a hv servo last night from a heli where only that servo was affected and nothing else, all others being regular v but digital.

I think once your battery v drops below 8v on a hv servo set up your on your own and they will cause exactly what you describe.

good luck

You know, it's funny but every time there's an upgrade of electronics on a heli they are always fraught with issues and more so because guys are mixing old and new things together.

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04-10-2014 05:05 PM  4 years agoPost 6
Ladymagic

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South Korea

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Sounds like your gyro did not initialize correctly. As rex already stated, if it really was windy during the initialization process it could have caused the failure. It's less likely, but the heli may not have been level when it initialized as well, but you did not indicate that you had any cyclic problems.

But, it also could be that your rudder servo crapped out or bound up on you for some reason. Definately check to see if your rudder servo has any stripped gears and that it is getting the correct voltage if it isn't designed to run at high voltage. Sometimes, controller settings reset on their own for no reason so, check that it is operating at a compatiable frame rate, check your internal gain settings, and that your control rod and slide system isn't binding, twisting, or has too much play.

Please let us know what you find. Gook luck=)

Mellisa

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04-10-2014 06:40 PM  4 years agoPost 7
HeliNutAndy

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worcester, MA USA

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Thx guys for the suggestions. It has a belt drive and I did check to see if it was slipping but it nice and tight. I will follow what's suggested and keep you posted.

Thx again,
Andy

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04-13-2014 11:56 AM  4 years agoPost 8
HeliNutAndy

rrKey Veteran

worcester, MA USA

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I checked my servo and went through my fbl settings to make sure nothing went south on me and I did not find any issues. I put a new set of tail blades on(a larger set) and went flying yesterday. I did not have any issues. The tail actually holds a bit better now with the bigger blades. I'm guessing the fbl unit did not initialize correctly like was mentioned. Another lesson learned. I need to make sure it does before spinning up those blades. What a nice day it was here yesterday. I must have flown 30 times yesterday.

Thx again for the help.
ANDY

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