RunRyder RC Helicopter Topic - Hummingbird CP problem...

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e-Century Hummingbird - Swift > Hummingbird CP problem...

GaryB
Heliman
Location: Kansas

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...i own a Hummingbird CP that i bought used off of RR (Futaba 401 gyro) - the pirouette rate was too fast for me so i turned down my Channel 4 ATV from 100% to approx. 70%...

...here's the problem - the last 2-3 flights (Normal Mode) have gone good for the first 1-3 minutes - then the tail cuts loose & it goes into a continual left pirouette right into the ground - could turning down my channel 4 rate from 100% to 70% have caused this?...

03-19-2006 Over year old.

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Planehazza
Veteran
Location: Newcastle, England

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Sounds daft, but check the little rubber stopper that holds on the tail rotor isnt coming loose.

As far as they know, I already had it!
T-Rex 450 XL HDE with metal upgrades

03-19-2006 Over year old.

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GaryB
Heliman
Location: Kansas

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...it has the GWS direct drive tail conversion...everything's still ok with it...so that's not the problem...

...like i said, the tail holds fine the first 1-3 minutes of the flight...then cuts loose and the heli crashes...

03-19-2006 Over year old.

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slider46
rrProfessor
Location: Gloversville, NY

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First off I would not limit the travel on the tail rotor IF I didn't absolutely have to, as you may need the extra travel to save your heli someday... Do you have a seperate esc on the tail?? Maybe it is cutting out early for over heating or low voltage...
Also does it do thes same thing in HH maybe you have a bad gyro....

Tom..... No "D" flying....

03-19-2006 Over year old.

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GaryB
Heliman
Location: Kansas

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...2 Castle ESC's - E-Flite brushless on the main rotor; GWS brushless on the tail rotor...

...the confusing thing is, i actually had 3-4 successful 6-7 min. flights on it before the gremlins set in - it would fall out of the sky after 1-3 minutes...just like you turned the switch off - i guessed it was the TP 700 mah 3s LiPoly's that came with the heli(replaced them with new TP 900 mah 3s Lipoly's) - evidently, i guessed right because the power doesn't turn off in flight any more - now we're doing power on crashes with no tail control!!!.........

...i just thought the lack of tail control might be related to me turning down my channel 4 ATV from 100% to 70%...

03-19-2006 Over year old.

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Silvashadow
Veteran
Location: Kent, UK

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IMHO changing the ATV should not have the effect you describe. You are powering up the gyro in HH mode I assume? I would try a new tail motor and see if you still have the problem.

03-19-2006 Over year old.

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GaryB
Heliman
Location: Kansas

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...yes, HH mode...could be - maybe the tail motor is bad...and overheating...

03-20-2006 Over year old.

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t.edwards
Senior Heliman
Location: Lake Geneva, Wisconsin

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Gary, Set the lvc on the tail motor esc lower than the lvc for the main motor. This way when you run the battery down and hit the lvc, the tail motor won't quit first. Happy Flying, Tom

03-22-2006 Over year old.

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e-Century Hummingbird - Swift > Hummingbird CP problem...

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