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2006 Colco LYNX 380XL 6CH RC Helicopter

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2006 Colco LYNX 380XL 6CH RC Helicopter

Old 11-05-2006, 09:56 AM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

GRRRRRRRRR I replaced the RX107 unit and also with a brand new RX and TX crystals and the problem remains:
------------------------------------------------------
I think me recieving unit RX107 is broke or something.
When I turn on the transmitter (with throttle down and everything else as its should) and connect the battery to the helicopter then the recieving unit only flashes RED (and the Gyro flashes superfast) and nothing more happens..
No controls or servos react. The only thing that works is that servos goes on and off when transmitter is going on or off.
------------------------------------------------------

Then it must be the transmitter, there is simply nothing left that that can cause this problem. Crap I dont feel for replacing that part because its the most expensive one and tis costs 50% of completely new RTF package
Any other tips? This made me wanting to quit this rc hobby
Old 11-06-2006, 02:11 AM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

I solved the problem with the transimitter. I took it apart and I already knew that there is no problems with the potentiometers that the controls and trims are connected to.
Beside that there are not so many components on the circuit board.
I found 2 adjustable components that can't (or are not ment to be) adjusted by the end user. It was 2 small variable potentiometers that where marked as "FREQ" and "DEV".
I didn't want to touch FREQ because it didnt believe that it was a frequency issue in the communication between tx<->rx. I mean the servos where reacting at switching on/off the TX. So I adjusted DEV a bit.
I started to turn in counterclockwise but then I noticed that the servos didnt react anymore at all not even om on/off of the reciever.
So I started to turn in clockwise and the servos started to live its own life! Like I was acting a mad man with the TX controls even if i didnt touch them.
So i turned it a bit more clockwise and then I noticed that the servos stopped living its own life and they also reacted according to when I moved the controls.
And even better was when I watched the RX107 stopped flasing the GAIN LED and the same for the gyro. The initialization seemed to work, the servos now reacted as they should and I could also start the motors! I didnt test flight it yet because it was to late but everything looks and works as it should now.

I hoped that this saved my from buying a TX. Ill keep you posted with my first test flight
Old 11-10-2006, 10:45 PM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

Dear Lostman,
I have the Lynx-380XL and am having good luck and a lot of fun with it. I have just one question...and I direct it to you because you seem to be a dealer and in-the-know, or anyone else who can help me.
1. In the manual they mention up-grading the battery to a Lithium Polymer 11.1v 1400mAh for best aerobatic performance. I am using the stock battery that came with my unit; Lithium Polymer 7.4v.
Can I upgrade to the 11.1v Li-Po and not change any-thing else??? or do I need to up-grade the speed-controller and motor as well?
Thanks,
Ken
Old 11-17-2006, 01:28 PM
  #54  
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

Since lostman is not answering: yes you can. However you will also need a 11.1V charger because the stock one doesnt go above 7.4v
Old 11-17-2006, 04:53 PM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

Dear House of Pain,

Thanks for that info, It wasn't too clear in the manual, If I can call it that.

How are things out in AB?

Old 11-29-2006, 11:29 AM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

I have a dark knight 2 with the same controller / rec. (the old)rx 107
i figured out how to get it started, but i believe there is some fine tuning to do to the servo "setup"

when it starts to take off it leans to the right and runs the rotors into the gurond, crashing before it ever gets airborn.

can anyone help with this?
Old 12-20-2006, 04:07 AM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter


Hi there lostman Icannot believe there is someone else with same problem as mine My lynx380 burnt out reciever controller exactly the same as yours unfortunately my lynx has not even managed to get of the ground I have a theory on why reciever burnt out 1 battery size 2 incorrect cable connection to controller (as in pink/white wires around the wrong way) Lyxn has not flown since new As I am new to Helis I think it has something to do with servo settings ie reversing [:@]
Old 12-20-2006, 04:13 AM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

Hi there buttheadgsxr1000 just a warning it may be incorrect but make sure higher voltage battery does not burnt out reciever/controller as i believe that is what has happened to mine
Old 12-20-2006, 04:15 AM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

Hi there buttheadgsxr1000 just a warning it may be incorrect but make sure higher voltage battery does not burnt out reciever/controller as i believe that is what has happened to mine
Old 12-20-2006, 02:40 PM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

Tooo late, I already burned mine out. I think the voltage was ok, but I used a 2200 mAh battery. I think you should not go any higher than around 1400mAh.

On the good side...I heard something rattling around in-side my receiver, so I took it apart only to find 2 ic's melted off the board. I managed to solder them back on...very carefully...and got it working again. I was lucky to have a spare receiver to see which way the ic's went on the board. They must have got so hot with the big battery that they melted the solder right off the tabs before they had a chance to burn out. Now i'm just keeping to the stock battery.
Old 12-21-2006, 02:43 AM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

Fixing new Lynx transmitter faults and straightening blade axle

ORIGINAL: buttheadgsxr1000
On the good side...I heard something rattling around in-side my receiver, so I took it apart only to find 2 ic's melted off the board. I managed to solder them back on...very carefully...and got it working again. I was lucky to have a spare receiver to see which way the ic's went on the board. They must have got so hot with the big battery that they melted the solder right off the tabs before they had a chance to burn out. Now i'm just keeping to the stock battery.
21.12.2006

Thanks for the warnings! Yes, with a heavier battery a heli will get heavier, too, resulting to more amperage, which heats the ESC fets. Yours were apparently heated melting hot!


Lynx transmitter errors

My Lynx 380 had some soldering faults in its transmitter already as new. I wonder if any of you did get a tx with similar errors? The directions of 3D and gyro switches were reversed (see photos). So was the pitch trim on the left upper corner of the tx. I resoldered them to work correct. Also, the pitch trim pushed the blade slider against its end. I rescaled the trimmer with an added 5 k resistor.

The aileron and elevator controls produced sudden pitch jump at their ends as they seemed to drive the servos against their stops. Their ranges had to be limited by soldering 2 k resistors to each ends of the potentiometers - a kind of fixed D/R modification. Also, the elevator stick fad a troublesome affect on pitch. Pushing the stick would drop the heli down, and pulling it would add lift. I did away with this effect out by moving the links in the two rear servo horns one hole closer to servo axle. Now the pitch seems to remain rather unaffected from elevator movement.

The pitch scaling trimmer on the right upper corner (see pic) of the tx produced a different problem. If it was set to low (ccw) in 3D mode, it produced sudden jump from positive to negative pitch. This is evidently a transmitter mixer programming error. In flight, it would probably have smashed the heli against ground. In its clockwise position the trim did not twitch the rotor pitch, so I readjusted it by scaling out the defect section by soldering a 12 k resistor on the ccw end of the trimmer pot.


Twisted blade axle

The Lynx blades looked a little weird as they seemed to hang. The heli shook violently when blades rotated. The reason for it appeared to be a curved axle between blade holders. I straightened it, which did away with the shaking problem.

For straightening the axle, the blade holder bearings were extracted from the axle with two pliers. Axle was fastened in a rotating three jaw chuck of a drill, and knocked gently with a plastic hammer until it was straight. Its straightness was visually checked by rotating the drill.

At the same time I checked the crossbolt on the main axle that felt loose. It proved to be broken in its hole. This heli seemed to have experienced some hard test flying in the factory. As a replacement to the 1,2 mm dia crossbolt, I bent a cotter from piano wire of similar thickness.


ARF, not RTF

Otherways, it seems mechanically a quite nice heli, and surely worth its price, after these initial faults are spotted and corrected. Also spare parts are moderately priced. The head lock gyro GY400 seems quite good and appears to work, at least on tabletop.

Correctly, the text on its box states that it is 95 % ready built and so almost ready to fly (ARF), not ready to fly (RTF)!

I have not yet dared to actually fly the heli. Will try it after Christmas. Here are some images of it.


- Juha -


Edit 28.12.2006:

First flights

Now the Lynx has been flown for a few days on our front yard! It behaves rather well for so low cost heli. It is quite stable, and with some skill it can be flown in gusty wind, too. No 3-D trials yet. In normal mode the gyro works well, but in heading hold mode it wags tail. The heli is also rather impact proof. Only a couple of blade fixes and axle straightenings this far..!
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Old 01-26-2007, 01:01 PM
  #62  
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

Now the Lynx electronics have been rather heavily modified and it has new home made lightweight balsa blades that help make the steering response quicker.

Its 10 year old owner likes it and tells that it is easier to fly than Dragonfly 4, his previous training heli.

We also tried it with a TV camera attached under its belly with a clothespin. Photos below.
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Old 02-05-2007, 04:30 AM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

Howdy guys,

This is the only thread I could find online about the LYNX 380XL. I just recently got one, and I can't seem to find a website that supplies replacment parts for it. I'm also curious as to if the Walkera 36 36B CNC Aluminum Metal Head Rotor Set will fit on the LYNX 380XL. If not, what CNC rotor set will fit? Any information would be greatly appreciated.
Old 02-08-2007, 01:03 PM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

I ordered my spares together with the heli from an eBay Hong Kong shop "RVMShop", http://stores.ebay.com/RVMShop-Store , ordering direct, not by ebay bidding.

They could deliver the parts in about three weeks. The spares were very moderately priced.

Although they sent a couple of wrong parts first, after my notice they quickly mailed the correct parts without charge. So their customer service has been very good this far.
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Old 02-08-2007, 08:51 PM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

For spares email this guy at [email protected]. He gives great service, competitive prices and even contributes to this thread too.

Also happens to be me!!
Old 02-24-2007, 06:30 PM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

i disagree, i bought one of these helis and its the best thing i have ever bought, i have had no problems with it. its very robust, i had a crahs with it (i was hovering in 3d mode and my neighboor came around and my heli was very close to him so i went to kill the engine but insted reversed the pitch, whan it hit the ground one or two of the blades went though the tail boom, the whole thing fliped on its side and went balistic.[:@]) it only broke the rotor blades and the boom, every thing in the rotor head survived.. but i would say that its not really a trainer cos it is a bit sensative.
Old 03-06-2007, 05:07 PM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

I have one of these choppers as a first chopper - two mates also bought them. We all found it near impossible to fly, however I made a simple mod that made it quite flyable -

move all the linkages to the inner hole of the servo - makes it much less sensitive and quite controllable.

Another good mod to do is take the front cover off the receiver/motor controller. This makes it run quite cool - when confined the thing just cooks. ( I may nibble out some holes in it so there rn't so many live parts exposed - also thought about sticking a small heatsink to the chips sticking out the top of the box)

I was so frustrated with it I'd nearly given up. But am really getting the hang of flying it now. Am curently thinking about upgrading to the brushless motor kit and the bigger battery.

The best thing about this chopper is it can take tons of abuse as it's pretty strong, as long as you have the power off when it hits the ground it generally comes out pretty good. Last weekend I got into a bad situation when the copter was about shoulder height, I cut the power and the thing fell straight down onto a concrete floor on its side with no damage at all.
Old 03-06-2007, 05:35 PM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

Dear RZBen,

I agree with everything you say. In fact I'm going to try your suggestion about moving the linkage on the servo tabs. I too am having trouble flying mine...it just seems too sensitive.

thanks for your input,
Ken
Old 03-06-2007, 07:01 PM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

Hey Ken,

You'll find it's whole different machine after doing that - the differences you'll note - it won't reverse pitch as the swash can't go up so far - which is a good thing for me cos it means that if the s*#t hits the fan you can dump the collective and it doesn't slam itself into the ground, the motor cuts and it comes down quite gently if u r not too high. The twitchyness is well reduced and after 4 batteries worth of practise I can fly it around the workshop without too much trouble.

Deff recommend taking the cover off the controller also just the side where the motor and batteries plug in - and hold it together with a small cabletie or something. After doing this the controller is hardly warm after a flight.

Have fun
Ben
Old 03-11-2007, 05:50 PM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

How did it work for you butthead?
Old 03-11-2007, 06:08 PM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

Dear nzbend,

I'm so busy these days, I haven't had a chance to even get close to it yet. The weather is so lousy hear, I'm going to wait a bit.

I'll keep you posted,
Ken
Old 03-25-2007, 01:18 AM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

OK, I made a big mistake of getting this Heli and not doing my research first.

I'm having the same big negative pitch jump as Juha was having.

In 3D mode, the full throttle factory setting gave me about 0° Pitch and would not hover the heli. Below 50% throttle stick position, the pitch jumps about 15° negative in one big burst. So I assume it's a mixing problem.
In normal throttle mode, the pitch change over the full throttle curve is about 1° which produces zero lift.

I've only bench run this thing as it's obviousl that it won't fly. Whilst running full throttle on the bench it also just powered down the motor. After bringing the stick to zero and back again, the motor came back.

This is such a crap POS!. Has anyone got any good ideas?, or do I just try and get a refund?

What would you heli-heads recommend instead as a good reliable CP model?

Thank you

Psi



ORIGINAL: J. Hartikka

The aileron and elevator controls produced sudden pitch jump at their ends as they seemed to drive the servos against their stops. Their ranges had to be limited by soldering 2 k resistors to each ends of the potentiometers - a kind of fixed D/R modification. Also, the elevator stick fad a troublesome affect on pitch. Pushing the stick would drop the heli down, and pulling it would add lift. I did away with this effect out by moving the links in the two rear servo horns one hole closer to servo axle. Now the pitch seems to remain rather unaffected from elevator movement.

The pitch scaling trimmer on the right upper corner (see pic) of the tx produced a different problem. If it was set to low (ccw) in 3D mode, it produced sudden jump from positive to negative pitch. This is evidently a transmitter mixer programming error. In flight, it would probably have smashed the heli against ground. In its clockwise position the trim did not twitch the rotor pitch, so I readjusted it by scaling out the defect section by soldering a 12 k resistor on the ccw end of the trimmer pot.


Twisted blade axle

The Lynx blades looked a little weird as they seemed to hang. The heli shook violently when blades rotated. The reason for it appeared to be a curved axle between blade holders. I straightened it, which did away with the shaking problem.

For straightening the axle, the blade holder bearings were extracted from the axle with two pliers. Axle was fastened in a rotating three jaw chuck of a drill, and knocked gently with a plastic hammer until it was straight. Its straightness was visually checked by rotating the drill.

At the same time I checked the crossbolt on the main axle that felt loose. It proved to be broken in its hole. This heli seemed to have experienced some hard test flying in the factory. As a replacement to the 1,2 mm dia crossbolt, I bent a cotter from piano wire of similar thickness.

- Juha -
Old 03-25-2007, 03:29 PM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

Use the mixing knobs on the control to set up the pitch mixing - the left knob sets the zero position and the right sets the gain setting between throttle and pitch - set it so it's reving quite fast when it lifts off, makes it slightly easier to control, I recommend putting all the linkages to the centre hole on the servos, I also recommend popping some holes in the cover to the speed controller and soldering the rotor main motor plug onto the board (after a while the connection gets bad and hot). Mine is currently set up so there is no -ve pitch which is ideal for learning as when u make a stuff up you can bring the throttle right back to zero and it doesn't slam the helicopter onto the ground. From my experience with it, it's acually a pretty good heli, tho it's issue is it's not setup properly out of the factory. The speed controller will melt if you dont' give it ventilation and the weedy plug the motor plugs in with adds alot of heat also - mine runs cool as now. This heli will take some real abuse with out breaking anything or only very minor damage providing power is off when it hits the ground. It's far stronger than a lot of more expensive choppers. Take some time and set it up,
Old 03-25-2007, 04:09 PM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

Both knobs do not work. If the manufacturer won't give me a replacement TX, I'll try replacing the resistors.



ORIGINAL: nzben

Use the mixing knobs on the control to set up the pitch mixing - the left knob sets the zero position and the right sets the gain setting between throttle and pitch - set it so it's reving quite fast when it lifts off, makes it slightly easier to control, I recommend putting all the linkages to the centre hole on the servos, I also recommend popping some holes in the cover to the speed controller and soldering the rotor main motor plug onto the board (after a while the connection gets bad and hot). Mine is currently set up so there is no -ve pitch which is ideal for learning as when u make a stuff up you can bring the throttle right back to zero and it doesn't slam the helicopter onto the ground. From my experience with it, it's acually a pretty good heli, tho it's issue is it's not setup properly out of the factory. The speed controller will melt if you dont' give it ventilation and the weedy plug the motor plugs in with adds alot of heat also - mine runs cool as now. This heli will take some real abuse with out breaking anything or only very minor damage providing power is off when it hits the ground. It's far stronger than a lot of more expensive choppers. Take some time and set it up,
Old 04-24-2007, 06:04 AM
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Default RE: 2006 Colco LYNX 380XL 6CH RC Helicopter

Can I upgrade my battery lipo 7.4 v 1600ma to a lipo 7.4v 2000ma on my Colco Lynx 380xl for longer fly or should I get a 11.4v lipo?

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