General Coaxial Helicopter Owners Thread

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[dborn]

Hi. Is there a reason that I can't find a forum or thread for the Megatech RC helicopters? Thank you from the father of a new owner. DB

[swatson144]

Welcome to HeliTown dborn.

Hi. Is there a reason that I can't find a forum or thread for the Megatech RC helicopters? Thank you from the father of a new owner. DB

Probably because there wasn't one until a few short mins ago, when I created it. Thanks for pointing that out.

Steve

[Ranger]

I found this while looking for something else
http://www.vaggshobbies.com.au/images/mainpage/heli/chinook2.jpg
http://www.vaggshobbies.com.au/images/mainpage/heli/chinook1.jpg
http://www.vaggshobbies.com.au/cgi-bin/index.asp

[JamNSK31]

I fly a blade cx, but my problem is most likely common to all coaxial helicopters. It seems that sometimes if i make a sharp move one way followed quickly by another move in the opposite directions, the blades (or possibly the stabilizer bar) seem to contact eachother. I bent my stabilizer bar in a wreck a little while ago, but i bent it back to nearly straight. The helicopter flies well otherwise, but i just wanted to see if anyone else has this happen.

[eddiemoth]

I happened to me once and I stop flying badly any more. I guess a coaxial helicopters are not designed for fast or quick turns.

[JamNSK31]

I figured out what it was. Apparently I had a broken upper rotor head. I'm guessing one side of the head broke so it allowed the upper rotor to move a little more than it was supposed to. I didn't figure that the rotor head was broken until both mounts broke and the upper rotor shattered both lower rotors and chipped one of the upper rotors. So, I'm off to the hobby shop tommorow morning to fix everything.

[Griffin]

Does anyone know how they setup the receiver and gyro to controll this thing? :?:? I am tempted to buy one just to find out how they do it? ;)

http://www.vaggshobbies.com.au/images/mainpage/heli/chinook1.jpg

(PS my 13 old says it is easy)

[swatson144]

On the CP tandems it's done by mixers. Mix the throttles less to front more to back for down elevator. inverse mix on ails for rudder.

Steve

[Dmoo]

anybody had experience with the esky Dauphin. Just got one and it appears the 4 in 1 controller is faulty after a couple of heavy landings. Anyone know a easy way to check it without going to the expense of purchasing a new one to try.
Dmoo

[eddiemoth]

Dmoo, Welcome to HeliTown. Are all servos working? I am not familar with esky Dauphin but most of 4 in 1 units are similar. What light do you get when connected to the battery?

[Dmoo]

Hi
Light starts out red and then instead of getting a green I get no light

[Dmoo]

Hi again
It appears the only function not working is the thottle control

[swatson144]

To both rotors? I'd think you may have a bad 4n1 if only one rotor turned.

Maybe someone who remembers the lights sequence can help the guy out?

Things to check... Maybe the throttle reverse switch on the TX got moved? Trim and stick fully down? Crystal fall out?

Are all servos working? That's needed if they aren't it's more on the RX side than the ESC side.

Steve

[Dmoo]

hi
thanks for the input. I pulled all inputs off the controller and reinstalled them also the crystal and fixed the problem. I guess something came loose on impact.

[pewe]

Hi,
anyone experienced the relation between flybar linkage balls width and the width between the upper blades holders linkage balls ?
What influence on behaviour of the coax: a) if flybar width shorter than blades holder? b) if flybar width larger than blades holder? c) if width is equal ?
This problem occured to me when trying to upgrade my coax with others manufacturers equipment ! ( alu, lighter, ballbearings, shorter, ...)
Any infos welcome, thanks

[Ddwineguy]

I crashed my Walkera Lama 400d. I replaced the blades, and the fly bar. Now when given throttle it will not lift off and spins in a clockwise direction. I can't notice any other damage. Does anyone have any ideas?

[Skytrek]

Humm, Are you saying the whole heli spins or both blades are spinning in a clock wise direction? The blades should counter rotate.

If it is the heli, you should check your ruder trims and make sure it is centered. Or you might have to trim a little more in the other direction from the spin.

Let us know!

[Skytrek]

Oh sorry, Welcome to Helitown!!

[Ddwineguy]

Thanks Skytrek

The whole helicopter spins. I did reset the trims but that did not work. I am thinking that one of the blades is slipping on the shaft but I am not sure. Also Walkera uses some pins to secure the rotor head to shaft and it might be those? I really like my esky honeybee v2 more. It is much easier to work on.

[swatson144]

Most common causes are

Swash separating

Anti rotation pin out of the forks

poor gear mesh/stripped

Steve

[craigerrator]

Hello out there in helicopter land. I am very new at rc helicopters, just got my first heli 4 weeks ago and have already spent about $100 for repair parts. My question is how long is the antenna wire suppose to be? after 12 crashes I noticed that my antenna wire is only about 1 inch long. I wonder if the short wire had any thing to do with going out of control went the heli was farther than 40 / 50 ft away.

[swatson144]

about 1" is right if it's 2.4G.

Steve

[mtpenguin]

Also if your 2.4G (Spektrum anyway), depending on the receiver and Tx, The receiver will give a special LED blink pattern if it lost signal for any reason. The Tx may have a range check ability.

Power Tx, Power Rx, wait for solid LED and full control.

Leave on ground with no power (maybe even disconnect the main rotor motor) and shut off Tx. Turn Tx back on. If your Rx can tell the disconnect, it will blink LED lost connect code.

CHECK YOUR MANUALS FIRST!!!!!


B-)

[mtpenguin]

Also if your 2.4G (Spektrum anyway), depending on the receiver and Tx, The receiver will give a special LED blink pattern if it lost signal for any reason. The Tx may have a range check ability.

Power Tx, Power Rx, wait for solid LED and full control.

Leave on ground with no power (maybe even disconnect the main rotor motor) and shut off Tx. Turn Tx back on. If your Rx can tell the disconnect, it will blink LED lost connect code.

CHECK YOUR MANUALS FIRST!!!!!


B-)