wkma7six
Heliman
Location: Los Angeles
My Posts This: Topic Forum | Hi everyone,
I have a question about the tail setup for those of you who have done the brushless tail setup with a heading hold gyro. Particularly the Eflite G90 with a Castle Creations Thunderbird 9 amp ESC and Feigao long can brushless motor using the stock geared setup. I've read and searched and some people do have to hold left stick to keep the tail from turning, but I didn't find any trim setup issues and specs.
My problems is this. So I got the itch to do the full brushless mods last night and had the parts sitting for a few weeks since I ordered it from bphobbies. I installed everything and wire it up and get it flying. No problems til I try to trim it out. I'm cranking my subtrim on my Futaba 9C to -101 ( to the left )for the rudder and adjusting the right rudder trim to +24 while the gyro sensitivity gain is set on +65 heading hold on my TX. No revo mixing of course! The tx throttle hold is also set with a rudder offset to keep it from spinning left at nearly half throttle on the tail motor. My Thunderbird 9 is also programmed with a NiCad/NiMh setting so I don't the get the tail cutoff and spin out of control ( my main motor ESC signals when power dies down so no need to lose the tail ). I've tried my old settings also with the brushed separates thinking it wasn't going to be off my much, but didn't workout.
I'm not having issues with flying this heli, but was wondering if anyone else is having these types of extreme settings on their setups once doing the brushless tail mod. It has TONS of tail authority and hovers like the tail has more control over the mains. Rock sold and very stable. This is just hovering indoors BTW. I will take it out soon.
I should mention that I've run the the brushed separates tail with the stock motor wired with a resistor and a Zener diode so that it get just over 9 volts and nothing more so the motor will last longer. With this setup, I had to only set the subtrim to around 30 for the rudder and timmed the rudder to the right very little during flight. This setup held well for hovering and basic flight, but never attempted any type of 3D.
Setup:
Eflite G90 Heading Hold Gyro
Eflite Park 370 4100Kv Main motor with integy steel 8 tooth pinion (from 1/18 scale R/C cars)
Century Autorotation main gear
Eflite 20 Amp BL ESC
Berg 7 receiver
Hitec HS 56 cyclic servos
Feigao Brushless long can tail motor with stock tail setup including stock pinion modified to fit
CC Thunderbird 9 BL ESC
Thunder power 910 and 1320 batts. Cg is beter with 1320, but higher AUW
Futaba 9C Super TX
Here are some pics so you guys can see the heli is setup properly:
TONS OF WIRES!!
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