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RE: Walkera Dragonfly #36 - 9/18/2005 9:24 PM   
ewr101


 

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Status: offline 		no i let the glue dry first, then put the screw in. i didn't want to glue the screw into the servo in case i needed to take it back out. do you know if there is some way of doing this so the screw will tighten down?? i have a few screws that are stripped or about to be. some on the frame some on the linkages (is that a word??-lol)


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RE: Walkera Dragonfly #36 - 9/18/2005 9:36 PM   
b16a2sir


 

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Status: online 		Wellk, i just installed the brushless setup it came with, Works 100%. So My problem has to be the ESC built in to the rX. Anyway, this has alot more power than before. Time top learn to hover!!!

WOOOOO HOOOOOOO!!

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RE: Walkera Dragonfly #36 - 9/18/2005 9:38 PM   
rotorcraftpilot


 

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Status: offline 		I read the whole post about the Dragonfly 36 and didn't see anything about what the max size of battery you can get? I like the Ni-mh rechargeable batteries. I am new to the whole electric heli seen. I have flown raptors and robbe machines for the past couple of years and I haven't a clue about electric heli's. I figure I will buy the Dragonfly 36 with the tx and rx ready to go. I know how to set it up and I am going to try a couple of mods. to it. I was just wondering what the biggest battery pack you could put in it is that is a Ni-mh. I haven't messed much with the Li-po; how well do they work and what is the weight of these battery packs? Please let me know of any good battery packs you have found that supply great power for a good amount of time. I prefer Ni-mh, but am willing to try the Li-po if they seem to be worth it. I have read that the tx with this heli does spaz out sometimes. Is this common or is this rare problem? I use futaba electronics in all of my other heli's. Is it a good idea to buy another rx and crystal and put it in this heli or just stick with the factory tx and rx? Any help you have would be great.

Thx, Kelly

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RE: Walkera Dragonfly #36 - 9/19/2005 1:58 AM   
millewi



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Status: offline 		ewr101
!QUOT!no i let the glue dry first, then put the screw in. i didn't want to glue the screw into the servo in case i needed to take it back out. do you know if there is some way of doing this so the screw will tighten down?? i have a few screws that are stripped or about to be. some on the frame some on the linkages (is that a word??-lol) !QUOT!

No when I do it I put the screw in before it is dry. Once it is dry you can unscrew and it will leave new threads. It is a little tight at first but it will pop lose and come out.

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RE: Walkera Dragonfly #36 - 9/19/2005 2:08 AM   
millewi



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quote]ORIGINAL: b16a2sir

Wellk, i just installed the brushless setup it came with, Works 100%. So My problem has to be the ESC built in to the rX. Anyway, this has alot more power than before. Time top learn to hover!!!

WOOOOO HOOOOOOO!!
[/quote]


I have a brushless setup coming also. I didn't get a Walkera because I don't like the gauge wire they have for the ESC battery connector. How hard was it to get the motor out. I also got a gear puller. Love these tools you can get for working on my copter.


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RE: Walkera Dragonfly #36 - 9/19/2005 3:20 AM   
jascamera


 

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Status: offline 		Hi,

I am flying a stock walkera 36. With the blue 2200 battery that come with the kit, the heli flies perfect. I damaged the it. Then I bought 2 more new 2200 blue walkera batteries for the same supplier. They only hover like 10sec before falling back on the floor. Anyone have a suggestion? Is it just bad batteries?

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RE: Walkera Dragonfly #36 - 9/19/2005 4:10 AM   
Spockie-Tech


 

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Status: offline 		Most likely..

I have read many accounts of those blue batteries being highly variable in quality. Shorted cells, low capacity and so on.

If you want to verify it, do what I suggested to someone earlier.

Hook up a multimeter to the battery connection point by poking a couple of bits of wire down the back of the battery conenctor where the wires go in and connect your meter in voltage mode to these points. Tie down or weigh down the heli with something heavy through the skids, keep your wires clear and spin it up.

If the batteries output voltage drops significantly then its not coping with the load. If it is normally sitting at 11v and it drops to 8 or 9v then the battery is faulty (or not charged).



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RE: Walkera Dragonfly #36 - 9/19/2005 5:13 AM   
b16a2sir


 

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Status: online 		Well, the walkera brushless seems pretty good to me. Lift off was quick, and it just screams! had to re adjust my pitch. The stock motor came out with a little persuasion on the wire terminal. Brushless went in easier with just a twist!! But then i hit a wall and broke the blade and holder. I think the stock motor is much easier to learn on!!

But while I was looking for blade holders. I found this;

Anyone able to give me more info on it, is it worth it?

< Message edited by b16a2sir -- 9/19/2005 5:16 AM >

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RE: Walkera Dragonfly #36 - 9/19/2005 6:16 AM   
+c0re-


 

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Status: offline 		Well I've read this whole thread, and it seems like people are having very varied results.

I'm thinking of getting one of these as a cheap introduction to a CP heli, but I have a few questions mainly regarding the batteries;

From what I've read, I'd like to steer clear of the cheap chinese li-poly batteries, they sound far too temperamental and in worst cases dangerous. If I'm going to be dealing with a slightly dangerous technology such as li-poly's I'd sooner buy some decent ones, but basically I don't want to buy a very cheap heli then spend almost the same again on good quality lipos & charger.

Are the stock NiMh batteries absolutely terrible or can they give you at least a few minutes of hover time? My thought was to buy a couple of these since they're only $15 & more importantly should be safe (I'd be charging whatever battery I got indoors). How about with a better quality Ni-mh pack?

I'm also wondering how these things fly with stock parts if you set them up correctly? I've seen the manufacturer's video clip and also the video clip earlier in this thread, which looked to be a heavily upgraded 36.

I'm not interested in any fancy flying maneuvers with this heli, I'd just like something of slightly higher quality than the Jabo etc. helis to learn hovering on. Assuming you've balanced the blades & heli, and adjusted the pitch etc, can you get it in a nice stable hover?

I was thinking of getting a t-rex but I can't ignore the fact that this is around 1/4 the price and looks to be quite similar, albeit lesser quality.

Oh also - there's a website which has a set of "lessons", I don't recall exactly but I remember it uses a box or square of tape or drawn on the ground, which you have to keep the heli inside. Hopefully that'll make sense to someone! If so could you give me the link please? Can't find it anywhere.

Thanks for any help on the above

< Message edited by +c0re- -- 9/19/2005 6:36 AM >

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RE: Walkera Dragonfly #36 - 9/19/2005 6:57 AM   
Spockie-Tech


 

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Status: offline 		As with most things in life, you get what you pay for..

The Walkera's I have are quite good mechanically (I have a #35 and a #39), but the electronics and batteries are junk - you're better off without them.

The servo's are jittery, have heaps of slop and weak.. the first time they get hit with any load, the cheap plastic gears will strip.. it happened to two of mine.

The radio receiver/esc is prone to sudden unexplained glitches and the in-built BEC seems to be marginally rated and overheats and shuts down for a second or so, which causes all the servos to freeze where they were for a second or two then it wakes up again (usually with your heli splatted on the ground and you wondering what happened).

The Gyro seems to do strange things at times as well.. mine was flying fine, then suddenly developed a case of tail-wag and nothing I've done so far seems to be able to eliminate it.

Funnily enough, the Lipo Charger they supply does actually put out a reasonably good stable charge voltage from my testing, but the Lipo's themselves are of highly variable quality.

The two NiMh batteries I received with my Walkeras are "ok" - They give maybe 5 minutes or so of flying time which is enough to hover about with for a little while, but I wouldnt want just 1.. you would want at least 2, one on charge and one flying.

The problem is, the plugpack they give you to charge the NiMh's is rubbish.. the usual unregulated, no end-of-charge piece of junk that will quickly reduce the capacity of the batteries from over-charging them.

If the budget doesnt stretch to covering some quality electronics, chargers and batteries, then I'd say buy a Walkera that comes with a Lipo, and buy one good quality Lipo battery in addition. If you are lucky the supplied Lipo will be ok, if not, you have the good one to use. The standard charger Lipo charger should do the job adequately from my testing so far.

Unfortunately, to get effective use of the NiMh's, you really need a better NiMh charger than the one that comes with it.



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RE: Walkera Dragonfly #36 - 9/19/2005 7:25 AM   
mattphung


 

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Status: offline 		Can anyone tell me their reverse settings on the back of the controller and what slots are used on the electronic box. For some reason my throttle(left stick) doesn't work. It doesn't do anything. The way I get the rotor to spin is by using the PLT knob. This doesn't seem right to me. Also, when I use the knob I notice that the more I turn the knob the faster the rotor spins and the more the swash plate tilt. Is this right? And how do I control the pitch? Any help will be greatly appreciated.

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RE: Walkera Dragonfly #36 - 9/19/2005 8:52 AM   
Spockie-Tech


 

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Status: offline 		If you're using the standard walkera receiver with the inbuilt ESC that shouldnt be happening.

channels 1 and 2 should be you swashplate control servo's
channel 4 goes to the gyro then the rudder servo connects to the lead coming from the gyro
channel 6 connects to the collective pitch servo (under the main gear)

channel 3 is internally connected to the speed controller, so how you've managed to get the pitch controlling that is beyond me..


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RE: Walkera Dragonfly #36 - 9/19/2005 5:21 PM   
+c0re-


 

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Status: offline 		Thanks, that's some helpful info!

Totally understand about getting what you pay for, just seems a shame that rather than increase the overall price by $20 or so, they use stuff that's so cheap it's borderline whether it'll even work.

So are the supplied li-poly's (blue 2200mah) safe? Seems like they have no overcharge protection or anything like that, is this correct?

Surprised to hear that the supplied lipo charger will do ok, is there any way to tell when it's charged without using a Multimeter?

I also have a couple more questions - is the ESC on the brushed motor version seperate from the rx? or is it some kind of integrated unit?

My idea is to gradually upgrade the electronics part by part over time (servos, Rx, maybe esc) and then when I've finally got a fairly good set of micro radio gear, swap it all over to a better barebone heli like a trex. Is the dragonfly Tx compatible with futaba or JR shift Rx's? (or neither)
Thanks again.

< Message edited by +c0re- -- 9/19/2005 10:03 PM >

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RE: Walkera Dragonfly #36 - 9/19/2005 10:13 PM   
thecheatscalc



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Status: offline 		+c0re- : hey the "free" li-polys charge fine. unless you get a burn PCM board like I did. if you do get out your Vmeter and check to see if the voltages of the cells are ok. sodder the plug onto 2 wires which you sodder onto the 11v tabs. it will still charge and run fine just make sure to get it off the charger between 1:20-30 min. Also the best way to see if it's charged is to use it.

Spocke: my servos are great... I've had some bone jarring crashes (with abs blades) and they work like new. my suggestion is to remove the screws that "hold" the horns on. (the restance is mre than plenty to keep them on) then in hard crashes the horn pops off saving a servo and all attached to it up the line.

mattphung : are your control rods on the servos connected?

my question is: how may of you have striped the in phase wheel assy.? (the thing in the chassis that is attached to the belt) and who thinks the stock motor is under powered? my "free" li-pos don't even get 130 degrees (nor does the motor ) but I still can't get off the ground.

AND does any one know what gauss rating are the magnets in the stock/align 420LF motor? I know of a site that sells 50N (highest streghnth magnets avalible) neodimum magnets in tons of shapes and sizes and I'm sure that would give the motor a boost as well as upgraded torque. what do you think?

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RE: Walkera Dragonfly #36 - 9/19/2005 11:56 PM   
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Status: offline 		Spockie-Tech, thecheatscalc -

thanks for the info but it still doesn't work. The rods are connected the all the channels work except for channel 3 (Throttle). Can it be something with the gyro? Do the gyro control the throttle. I tried everything........ I 'm getting so desparate that I might even switch No. 8 on the reverse panel to unlock. Any advice would be greatly appreciated.

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RE: Walkera Dragonfly #36 - 9/20/2005 5:25 AM   
mattphung


 

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Status: offline 		I fixed the problem with the throttle. I think it had something to do with the electronics in the control box. I took it apart and switch the wires and I got the throttle to work with channel 3. Very strange but it works now. I guess by switching the wires and then putting them back I managed to rest the settings. Thanks everyone for all your help

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RE: Walkera Dragonfly #36 - 9/20/2005 5:33 AM   
Pubhi


 

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Status: offline 		Has anyone tried changing the rudder servo? I think i'm going to have to change the tail servo and the aileron servo. Everything else is working great but i'm experiencing some trouble with these servos. So, if anyone else has tried to change these servos and improved the functioning of the heli, please let me know. Thanks.

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RE: Walkera Dragonfly #36 - 9/20/2005 9:31 AM   
CitYbYdBaY


 

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Status: offline 		What is going on with your heli? Why would you want to change the rudder servo and the aileron servo? I have changed my pitch servo and elevator servo with hi tech hs-55 servos becuase I stripped the stock servos moving them by hand. I still have the stock servo for the aileron and yellow tail servo for the rudder on my heli.

I am getting better at hovering but still keeping it low to the ground until I get better. I have good results using the walkera blue 2200 mah Li-po battery and supplied wall Li-ion charger, along with the 180 brushless motor and 30a esc and stock gyro.

I am thinking about getting another blue 2200 mah li-po battery pack for more flight time and less down time. For the price, it's really hard to beat for a newbie like me.

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RE: Walkera Dragonfly #36 - 9/20/2005 5:21 PM   
nuhelo


 

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Status: offline 		Im glad that some one else started a thread. cuz i my self am having difficulties with my new dragonfly 36 off of ebay. I recieved two sets of foam blades, a 650mah, and 2200 lopi batteries. the seller said that it was set up and adjusted. upon recieving the bird i know that there were adjustments needed still.

im also having troubles with the 650mah getting me more then 3 inch off the deck. the 2200 seems to be good enought to do any thing. How long are you suppose to charge them? the cheap chager came with a sheet and said it will become hot and Wet. it sounds like poor translation to me. on the other hand the 2200 says no more then 3 hours is this the generall rule of thumb? from the reading it sounds like i need to invest in a swollow charger.

when i started out the collective seems to be set way way to flat and had to adjust it too almost the farthest it will go? is that right?

yet another ? my rudder seems to stuck in one spot. i can chang the direction of the nose but when i let go it goes to the same spot it was before.

i had to mess with the swt on the back of the controler to get a good set up. im just wondering if i have it all wrong. i have now. 1,4,6,8,9,10 as being on. if this is wrong can someone let me know, im afraid that ive worked it out wrong and will have proplems down the road. thanx.

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RE: Walkera Dragonfly #36 - 9/20/2005 5:56 PM   
Pubhi


 

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quote:

ORIGINAL: CitYbYdBaY

What is going on with your heli? Why would you want to change the rudder servo and the aileron servo? I have changed my pitch servo and elevator servo with hi tech hs-55 servos becuase I stripped the stock servos moving them by hand. I still have the stock servo for the aileron and yellow tail servo for the rudder on my heli.

I am getting better at hovering but still keeping it low to the ground until I get better. I have good results using the walkera blue 2200 mah Li-po battery and supplied wall Li-ion charger, along with the 180 brushless motor and 30a esc and stock gyro.

I am thinking about getting another blue 2200 mah li-po battery pack for more flight time and less down time. For the price, it's really hard to beat for a newbie like me.






The rudder just quits responding sometimes and I have to reset the gyro to get it to work again.

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RE: Walkera Dragonfly #36 - 9/20/2005 7:11 PM   
thecheatscalc



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Status: offline 		that could be your gyro doing that...
li-po charging times on stock charger is 1:20-30 long.
the ni-mh batterys are just crap so don't worry about that (i'm amazed that you even got 3 in. mine never got that high!)
any more questions?

don't mess with the controls on the back. they switch the controlls of the ones they control. just make sure every thing is centered, pitch is set at a max of 13 degrees. all is level. the gear mesh should have .75-.50 mm clearance. (tail in) at neutral the rear blades should be at 15 degrees and blowing to the left. paddles at 0-2 degrees pitch.

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RE: Walkera Dragonfly #36 - 9/20/2005 8:14 PM   
newimage


 

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Status: offline 		Hi,

Would any body know what is thebest adjustment on a 36 walkera to make pitch adjustments more gentle i find it very difficult to keep at the same height without jumping up and down like a yo yo.

What would be the best adjustment to make

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RE: Walkera Dragonfly #36 - 9/20/2005 8:41 PM   
thecheatscalc



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Status: offline 		take the servo arm off the center servo. stick the rod in a hole closer to the center. if that's too much still then move it a hole closer. keep doing that till you fell like it's in the right place. hope that helped!

PS: how may of you have had trouble with the stock motor not having enough power?

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RE: Walkera Dragonfly #36 - 9/20/2005 11:25 PM   
thecheatscalc



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Status: offline 		ok if any one could give a quick answer that'd be great as I kinda need it fast. Does a trex main gear work on a walkera 36, (the large one) and less important what's its name?

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RE: Walkera Dragonfly #36 - 9/21/2005 3:47 AM   
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Status: offline 		I read the manual and it said the right stick should be the throttle and the left stick should be forward/backward. I always thought the left stick contols the throttle? Is this right or does Walkera need an English person to proof read their manuals?

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