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Futaba-RC . A Main Hobbies . Boca Bearings

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e-Century Hummingbird - Swift > HB radio interference?
 
 
B.Waitkus
Veteran
Location: Cranberry Capital (Carver, MA)

Does anyone have an idea why I am getting radio hits at full throttle only???? The servos start twitching etc...




Thanks
08-09-2003 Over year old.
 
 
B.Waitkus
Veteran
Location: Cranberry Capital (Carver, MA)

and it only happens when throttle is given...
08-09-2003 Over year old.
 
 
MADGUNS
Senior Heliman
Location: RAF Mildenhall

I answer with more questions

As for interference how is your Antenna set up?
If it is wrapped up around any of the carbon you may get wacky signals.
Is your TX charged all the way up?
Have you ever flown this machine with the MS blades?
If not I see your running the 370 I assume you have a 10 tooth
That may be to low of a gear for this set up.
What type of batterys are you running?
I have a Hummingbird / Feda Feda mechanics and Hbird guts with CSM. I also run an Orion with 12 tooth stock blades and High atail motor. I have never tweaked my blades so I am sure they have warped into a pretty light pitch.
Your problems with the Hummingboard, the interference, and not being able to get OGE are symptoms of undercharged batterys. On my Bird with a full charge If I make the LED go RED.. IT is on its way to the MOON. I tried a 9 tooth pinion on my orion and its is GUTLESS. It climbs but it just is too slow for the way I fly. If I get really high outside and want to desend a 9tooth does not have enough RPM's to get me out of trouble. The 12 runs my motor warm but I also have a heatsink on it so it tends to run cooler. After I have been flying for a while I start to lose tail authority and it starts to glitch. When my battery is low I gun it and the LED turns red and I cant get OGE. The RED I think tells you its at full bore. Your machine on a fresh charge should lift off out of ground effect showing a green LED.

Charge the hell out of your batterys if they are NIMH or Nicads
Charge your TX and make sure that antenna in the helo and TX are secured
Change to a higher tooth pinion gear for those blades
Hope this helps
08-09-2003 Over year old.
 
 
B.Waitkus
Veteran
Location: Cranberry Capital (Carver, MA)

Thanks man


but why do the servos only glitch at 50% or more throttle?
08-09-2003 Over year old.
 
 
MADGUNS
Senior Heliman
Location: RAF Mildenhall

Power Baby Power

I think its because the main and tail motor are able to draw as much current as they want. I think at the end of a flight they rob power from the RX which gives you a weeker signal. Hence the glitching. Do you got LiPoly's? I swear those things are like bolting an afterburning turbo fan on a cessna 150 Well maybe not that drastic.
08-09-2003 Over year old.
 
 
wedge
Elite Veteran
Location: Victoria BC, Canada

do you have resistors soldered to your motor like the orignal one??

Wedge
08-09-2003 Over year old.
 
 
B.Waitkus
Veteran
Location: Cranberry Capital (Carver, MA)

MADGUNS I think your right, cause it only happens when lots of power is given to the motor!!

wedge The stock 370 motor comes with them installed



Brandon
08-09-2003 Over year old.
 
 
MADGUNS
Senior Heliman
Location: RAF Mildenhall

Those are not resistors those are Capacitors
I do not have one on my Orion. It is the only DC motor that does not require Capacitors. The capacitors function as a Filter for EMI
Thats Electro Magnetic Interference. I experienced this firsthand by installing an 370 I had lying around. It would hover fine for about 30 seconds and then crash hard to the left. The build up of static and interference made the Cyclic servo pitch hard right. You can expect the same problems if you do not have a capacitor on the tail motor. Hope this helps you out. Get your rotor speed up for those blades. Try a LIPOLY battery too
08-09-2003 Over year old.
 
 
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e-Century Hummingbird - Swift > HB radio interference?
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